Samuel Coquereau
(Centre National de la Recherche Scientifique (FR))
23/07/2015, 09:00
Electroweak penguin b-hadron and c-hadron decays are very sensitive to physics beyond the Standard Model. Recent LHCb measurements have shown indications of large unexpected asymmetries in B→K*μμ and hints of lepton universality violation. Latest results involving new decay modes are presented.
Antonio Marrone
(Univ. of Bari)
23/07/2015, 09:00
We review the status of the neutrino oscillation parameters,
as determined from a global analysis of all available neutrino
data, in a the standard three-neutrino mass-mixing framework.
We analyse the correlations between the oscillation parameters
and we discuss the current status and the prospects for a near
future determination of the neutrino mass hierarchy and of the
CP-violating...
Prof.
Georg Weiglein
(Deutsches Elektronen-Synchrotron (DE))
23/07/2015, 09:00
The relation between the mass of the W boson, the Z boson, the fine structure constant and the Fermi constant is one of the most important precision observables, which provides access to the quantum structure of the underlying theory and has a high sensitivity for discriminating between different models. Updated predictions for the W-boson mass in the Standard Model (SM) as well as its minimal...
Ilse Kratschmer
(Austrian Academy of Sciences (AT))
23/07/2015, 09:00
This talk presents the CMS quarkonium production results in pp collisions, placing emphasis on the most recent measurements, which include the S-wave Psi(nS) and Y(nS) cross sections up to transverse momenta exceeding 100 GeV with the Run-1 dataset, and reports on the prospects for B physics measurements with high statistics data at CMS, and presents preliminary results obtained with 13 TeV data.
Elena Gonzalez Ferreiro
(Universidade de Santiago de Compostela (ES))
23/07/2015, 09:00
In nucleus-nucleus collisions, quarkonium production is expected to be significantly suppressed as a consequence of the colour screening of the force that binds the ccbar (bb) state. In this scenario, quarkonium suppression should occur sequentially, according to the binding energy of each state. As a consequence, the in-medium dissociation probability of these states can provide an estimate...
Laura Reina
(Florida State University (US))
23/07/2015, 09:00
The available information on the properties of the observed Higgs signal is assessed in view
of the current experimental accuracy and the employed theoretical assumptions. Possible
interpretations of the observed signal in scenarios of physics beyond the Standard Model are
discussed in view of their phenomenological implications, and the experimental sensitivity
for discriminating between...
Dr
Mauro Dinardo
(Universita & INFN, Milano-Bicocca (IT))
23/07/2015, 09:15
The Flavour Changing Neutral Current decay, B0 -> K*0 mu+mu-, is very sensitive to New Physics through its observables like A_FB (muon forward backward asymmetry), F_L (longitudinal polarisation of K*), and differential branching fraction. So far, these parameters are consistent with the Standard Model prediction. We will report the recent results from CMS on these parameters using the 20...
Stefanos Leontsinis
(National Technical Univ. of Athens (GR))
23/07/2015, 09:15
We present a large number of detailed measurements of the production of various open and hidden charm (D meson, J/psi, psi(2s), chi_c) states at the ATLAS experiment at centre- of-mass energies of 2.76 TeV, 7 TeV, and 8 TeV. The total charm production cross-section at the LHC is also determined. These measurements extend in reach and precision beyond those currently available, and we compare...
Dr
Emmanuel Chauveau
(RCNS Tohoku University)
23/07/2015, 09:15
Double Chooz aims to measure the last neutrino mixing angle theta13 with a 10 % precision through the disappearance of reactor electronic anti-neutrinos. The experiment relies on the measurement of neutrino flux and spectrum with two identical detectors at different location: one at 1 km of reactor cores to observe the disappearance of neutrinos around the first minimum, and one around 400 m...
Mr
Tevong You
(King's College London)
23/07/2015, 09:15
Particle physics in the last century can be described as a series of effective theories, each
predicting its own range of validity beyond which a more fundamental theory must take over.
This program culminated in the Standard Model (SM), with all its constituent particles
now experimentally established following the 2012 discovery of a Higgs boson. The SM is a
renormalizable theory valid...
Jenny Lyn Holzbauer
(Mississippi University (US))
23/07/2015, 09:25
We present $W$ boson and lepton charge asymmetry measurements from $W$ decays in the electron channel, with 9.7 fb$^{-1}$ of RunII data collected by the D0 detector at the Fermilab Tevatron Collider. The electron charge asymmetry is presented as a function of the electron transverse momentum and pseudo-rapidity out to $|\eta|\leq 3.2$; we also give the $W$ charge asymmetry as a function of $W$...
Ayan Paul
(INFN, Sezione di Roma)
23/07/2015, 09:30
The rare semileptonic B_d → K∗μ+μ− decay has been extensively studied within the Standard Model (SM) and beyond. In the last two releases, measurements provided by the LHCb experiment suggested a discrepancy found between the theoretical SM prediction and the experimental value of the angular observable P′5 at low q^2.
We critically reassess the theoretical uncertainties in the Standard...
Barbara Trzeciak
(Czech Technical University in Prague)
23/07/2015, 09:30
Despite extensive studies, the J/$\psi$ production mechanism in hadron collisions is not yet exactly known.
For many years, mostly J/$\psi$ differential cross-section measurements have been used to test different J/$\psi$ production models. While many models can reasonably well describe the experimental data on the J/$\psi$ cross-section in $p+p$ collisions, they have different predictions...
Xiangpan Ji
(Tsinghua University)
23/07/2015, 09:30
Precise determination of the neutrino mixing angle $\theta_{13}$ is important for searches of CP violation in the lepton sector. The Daya Bay Reactor Neutrino Experiment (Daya Bay) observed electron antineutrino disappearance and measured a nonzero value of $\theta_{13}$ with a significance greater than 5 standard deviations in early 2012. With the final two detectors installed, Daya Bay...
Andres Sandoval
(Instituto de Fisica, UNAM)
23/07/2015, 09:30
The High Altitude Water Cherenkov (HAWC) Gamma-Ray Observatory was completed this year at a 4100-meter site on the flank of the Sierra Negra volcano in Mexico. HAWC is a water Cherenkov ground array with the capability to distinguish 100 GeV - 100 TeV gamma rays from the hadronic cosmic-ray background. HAWC is uniquely suited to study extremely high energy cosmic-ray sources, search for...
Li Yuan
(Kobe University (JP))
23/07/2015, 09:40
This talk will review the status of what has been learned from LHC run-1 about the properties of
the observed Higgs boson mostly from the bosonic decay channels, but also from latest/final
inclusive analyses of the coupling structure. As far as considered relevant updates on the analyses
in individual bosonic decay channels can be touched, but these discussions should be concise. The...
Aleksandra Dimitrievska
(Institute of Physics Belgrade (RS))
23/07/2015, 09:43
The ATLAS Collaboration is engaged in precision measurement of fundamental Standard Model parameters, e.g. the weak-mixing angle and the complete set of coefficients that describe the angular distributions of Drell-Yan production.
A measurement of the forward-backward asymmetry for the neutral current Drell Yan process is presented and the results are then used to extract a measurement of...
Martin Erdmann
(Rheinisch-Westfaelische Tech. Hoch. (DE))
23/07/2015, 09:45
We present a new method of investigating the galactic magnetic field
using public data of ultra-high energy cosmic rays. In comparisons of
expected and measured arrival directions of the cosmic rays we evaluate
the directional characteristics and magnitude of the field. Our analysis
provides first experimental verification of the deflection of ultra-high
cosmic rays in the galactic...
Seon-Hee Seo
(Seoul National University)
23/07/2015, 09:45
RENO has been taking reactor neutrino data to measure neutrino mixing angle theta_13
since Aug. 2011 using two identical detectors located in Near and Far sites in Yonggwang, Korea. The data taking has gone smoothly to collect data more than 1 M (0.1 M) neutrino events in the Near (Far) detector as of May 2015. Currently we are at the stage of finalizing our new results based on spectral...
Alexei Garmash
(Princeton)
23/07/2015, 09:45
Recent observations of charged charmonium-like states have opened an interesting landscape in the field of hadron spectroscopy. Continuing with its tradition, Belle recently observed a new charged charmonium-like state Zc(4200) and obtained an evidence for Zc(4430) → J/ψπ+ in B → J/ψπK decays. Belle also found the first evidence for a new charged state Zc(4020)+ in their updated study of ISR...
Michal Sumbera
(Acad. of Sciences of the Czech Rep. (CZ))
23/07/2015, 09:45
We discuss possible experimental tests of the Color-Singlet model (CSM) in associated J/psi or Y plus leading hadron production in pp collisions at RHIC and LHC energies. Using color dipole approach we calculate several different observables of leading hadron and rapidity/azimuth difference between produced J/psi or Y and the leading hadron in the CSM approach. As a very promising measurement...
Peter Stangl
(Excellence Cluster Universe, Munich)
23/07/2015, 09:45
We investigate whether
the $2.6\sigma$ deviation from lepton flavour universality
in $B^+\to K^+\ell^+\ell^-$ decays recently observed at the LHCb experiment
can be explained in minimal composite Higgs models.
We show that a visible departure from universality is indeed possible
if left-handed muons have a sizable degree of compositeness.
Constraints from $Z$-pole observables are avoided...
Javier Fuentes-Martin
(IFIC, Universitat de València-CSIC)
23/07/2015, 10:00
Motivated by the $b\to s\ell^+\ell^-$ anomalies recently reported by the LHCb collaboration, I will present a class of flavored $\mathrm{U(1)}^\prime$ gauge extensions of the Standard Model that naturally accommodate them and present a rich phenomenology.
This class of models is characterized by the presence of tree-level flavor-changing $Z'$ couplings in the down-quark sector, protected by...
Melody Ravonel
(Universite de Geneve (CH))
23/07/2015, 10:00
T2K is a long-baseline neutrino oscillation experiment, in which a muon neutrino beam is produced at J-PARC and detected 295 km away at the Super-Kamiokande detector. The T2K experiment observed electron-neutrino appearance in 2012. This observation enables T2K to explore CP violation in the lepton sector by comparing electron-neutrino appearance and electron-antineutrino appearance. Indeed,...
Yutie Liang
(Giessen University)
23/07/2015, 10:00
The BESIII Experiment at the Beijing Electron Positron Collider (BEPCII) has accumulated the world's largest samples of $e^+e^-$ collisions in the tau-charm region. From the collected samples, which include $e^+e^-$ annihilations at J/psi, psi(2S), psi(3770) peaks and in the region from 4 GeV to 4.6 GeV, BESIII has produced many new results in the spectroscopy, transitions, and decays of...
Rajdeep Mohan Chatterjee
(Tata Inst. of Fundamental Research (IN))
23/07/2015, 10:01
The production of W and Z bosons is studied in pp collisions at a center-of-mass energy of 8 TeV using data collected in the CMS experiment. W events are selected containing an isolated, energetic electron or muon. Z events are selected containing a pair of isolated, energetic electrons or muons. Data-driven methods are used to estimate reconstruction and triggering efficiencies, and well as...
Petr Chaloupka
(Czech Technical University in Prague)
23/07/2015, 10:05
In the collisions of heavy ions the nuclear matter can undergo a phase transition from hadrons to a state of deconfined quarks and gluons, the Quark-Gluon Plasma (QGP). Suppression of heavy quarkonia due to Debye-like screening of the quark-antiquark potential, has been predicted to be a sensitive indicator of the thermodynamical properties of the created QGP. However, cold nuclear effects and...
Prof.
Georg Ralf Weiglein
(Deutsches Elektronen-Synchrotron (DE)), Prof.
Gudrid Moortgat-Pick
(University of Hamburg / Desy)
23/07/2015, 10:10
We discuss the importance of off-shell Higgs contributions
for a SM-like Higgs boson at a linear collider and the LHC. Possible constraints on the total Higgs width are investigated, the involved theoretical assumptions are analysed, and it is shown that the interference between signal and background limits the sensitivity for a SM-like width. Off-shell contributions and signal-background...
Paoti Chang
(National Taiwan University)
23/07/2015, 10:15
We will present new results on leptonic and radiative leptonic decays. Purely leptonic B meson decays, $B \to \ell \nu$, are helicity-suppressed in the Standard Model (SM), and while more challenging for the extraction of the CKM matrix element $|V_{ub}|$, they are excellent probes of models beyond the SM. The decay $B \to \ell \nu\gamma$ is not affected by this suppression and gives access to...
Dr
Antonio Surdo
(INFN - Sezione di Lecce (IT))
23/07/2015, 10:15
The CR spectrum has been studied by the ARGO-YBJ experiment in a wide energy range (TeV → PeV). This study is particularly interesting since it allows a better understanding of the so called "knee" of the energy spectrum and its origin, and also provides a powerful cross-check among very different experimental techniques. The unique detector features (full coverage, time resolution, large...
Sheldon Stone
(Syracuse University (US))
23/07/2015, 10:15
Observations of exotic structures in the $J/\psi p$ channel, that we refer to as pentaquark-charmonium states, in $\Lambda_b^0 \to J/\psi p K^-$ decays are presented. The data sample corresponds to an integrated luminosity of $3~fb^{-1}$ acquired with the LHCb detector from 7 and 8~TeV $pp$ collisions. An amplitude analysis is performed on the three-body final state that reproduces all the...
Aran Garcia-Bellido
(University of Rochester)
23/07/2015, 10:19
We present measurements of the $Z\gamma$* rapidity and $\phi$* production distributions and the weak mixing angle from $Z$ boson decays, with all RunII data collected by the D0 detector at the Fermilab Tevatron Collider. The measurement of $\phi*$ probes the same physical effects as the $Z/\gamma$* boson transverse momentum, but is less susceptible to the effects of experimental resolution and...
Gabriele Sirri
(Universita e INFN, Bologna (IT))
23/07/2015, 10:22
The OPERA experiment at the Gran Sasso underground laboratory has been
designed to study the nu_mu -> nu_tau oscillation in appearance mode in the
CNGS neutrino beam. Four nu_tau candidate events have been confirmed so
far, using a sub-sample of data from the 2008-2012 runs. Given the number
of analysed events and the low background, nu_mu -> nu_tau oscillations have
been established...
Andrew Pilkington
(University Of Manchester),
Bob Kowalewski
(University of Victoria (CA)),
Dag Gillberg
(CERN), Dr
Florian Urs Bernlochner
(Universitaet Bonn (DE)),
Holger Schulz
(Humboldt-Universitaet zu Berlin (DE)),
Michaela Queitsch-Maitland
(University of Manchester (GB)),
Yanping Huang
(Deutsches Elektronen-Synchrotron (DE))
23/07/2015, 10:25
In 2014 ATLAS published a first set of $H \to \gamma\gamma$ and $H \to 4 \ell$ differential fiducial cross sections and CMS is finalizing similar results. These measurements are carried out close to the experimental fiducial region and have minimal underlying model dependencies and can be used to constrain beyond the Standard Model physics scenarios coupling to the Higgs sector. Using these...
Ryan Mackenzie White
(Federico Santa Maria Technical University (CL))
23/07/2015, 10:25
The production rates of heavy quarkonia states in A-A collisions provide sensitive probes to the hot and dense QGP. However, a reference for understanding the dissociation in the hot medium is necessary; p-A collisions open the possibility to study heavy quarkonia states in a smaller system. This is an important step in forming a baseline for understanding A-A collisions, as well as an...
Ruben Mauricio Da Silva Conceicao
(LIP Laboratorio de Instrumentacao e Fisica Experimental de Part)
23/07/2015, 10:30
The interaction of Ultra High Energy Cosmic Rays with the atoms of the atmosphere can occur at center-of-mass energies that surpass the 100 TeV, while present man made accelerators go up to 13 TeV. Therefore it provides a unique opportunity to explore hadronic interactions at the highest energies. However, the extraction of hadronic interaction properties from the Extensive Air Showers (EAS)...
James William Walder
(Lancaster University (GB))
23/07/2015, 10:30
Hadronic spectroscopy has experienced a renaissance in the last decade thanks to experiments at B-factories and Tevatron and recently at the LHC. A wide zoology of quarkonium-like states still needs to be understood within a possibly consistent framework that the LHC experiments are now contributing to enrich. The latest results on the production and decay properties of exotic mesons in the...
Agnieszka Ilnicka
(University of Warsaw)
23/07/2015, 10:40
The first run of the LHC has successfully discovered a Higgs boson, however no signs of New Physics were found. This may suggest that the New Physics is beyond reach of current experiments, and may be accessed just by measuring small deviations from SM predictions. Effective Field Theory (EFT) offers a consistent bottom-up approach to parametrise such deviations. In our work we apply the EFT...
Alec Habig
(University of Minnesota)
23/07/2015, 10:45
NOvA is an off-axis long-baseline neutrino experiment, looking for $\nu_e$ appearance in an upgraded NuMI beam of $\nu_\mu$ to precisely measure the recently discovered $\theta_{13}$ acting in subdominant $\nu_\mu\rightarrow\nu_e$ transitions. As an appearance experiment, NOvA might also be sensitive to CP-violating $\delta$ and the neutrino mass hierarchy. To maximize sensitivity to the...
Fulvia De Fazio
(INFN Bari)
23/07/2015, 10:45
The relaxation towards the hydrodynamic
regime of a boost-invariant non Abelian plasma taken
out-of-equilibrium is investigated using a holographic approach.
In the dual description, the system is driven out-of-equilibrium by
boundary sourcing,
a
deformation of the boundary metric, as proposed by Chesler and Yaffe.
The corresponding Einstein equations in the bulk are solved, and the...
Dr
Shaouly Bar-Shalom
(Technion, Israel)
23/07/2015, 11:30
Assuming the presence of physics beyond the Standard Model
with a characteristic scale $M \sim O(10 ~ TeV)$, we investigate the
naturalness of the Higgs sector at scales below $M$
using an effective field theory (EFT) approach.
We obtain the leading 1-loop EFT
contributions to the Higgs mass with a Wilsonian-like hard cutoff,
and determine the constraints on the corresponding operator...
William James Barter
(CERN)
23/07/2015, 11:30
LHCb's unique forward acceptance allow for complementary measurements of electroweak boson production. Thanks to the precise vertex detector and the gas injection system LHCb has the most precise luminosity calibration at the LHC. New precision W and Z cross-section measurements at 7 and 8 TeV are presented.
Darren Price
(University of Manchester (GB))
23/07/2015, 11:30
We present recent results on heavy flavor jet production in association with weak vector bosons using proton-antiproton collision data collected with the D0 detector at center of mass energy of 1.96 TeV. Studies of these processes provide tests of perturbative QCD predictions and non-perturbative effects. They are also important backgrounds to many precision SM measurements as well as searches...
Lizardo Valencia Palomo
(Univ. Blaise Pascal Clermont-Fe. II (FR))
23/07/2015, 11:30
Quantum Chromodynamics (QCD) predicts that at high energy density, ordinary nuclear matter undergoes a phase transition towards a new state of matter called Quark-Gluon Plasma (QGP) that is characterized by deconfined quarks and gluons. High-energy Pb-Pb collisions are used to reach the thermodynamical conditions to create the QGP. As heavy quarks (charm and beauty)
are produced in the...
Pablo Ruiz Valls
(Instituto de Fisica Corpuscular (ES))
23/07/2015, 11:30
LHCb recently reported the first observation of a non-zero photon polarisation in b→γs decays. The interpretation of this result in terms of potential right-handed currents is still open. New results from the decays Bs→φγ and B0→K0ee are presented.
Nicolas Arnaud
(LAL (CNRS-IN2P3))
23/07/2015, 11:30
Since fall 2011 the Virgo collaboration has undertaken a major detector upgrade aiming to make the sensitivity of the Advanced Virgo gravitational-wave interferometer a factor 10 better than that of initial Virgo. 2015 should mark the completion of the Advanced Virgo construction and the restart of an intense commissioning activity. This talk will present the status and outlook of Advanced Virgo.
Marco Martini
(University of Ghent)
23/07/2015, 11:30
In the present and future accelerator-based neutrino oscillation experiments nuclear targets (such as C, O, Ar and Fe) are involved. Hence the knowledge of neutrino-nucleus scattering is very important. In particular it is crucial for the determination of the neutrino energy which enters the expression of the oscillation probability, since this energy is reconstructed from the final states of...
Brais Sanmartin Sedes
(Universidade de Santiago de Compostela (ES))
23/07/2015, 11:45
Charmless B meson decays proceed via suppressed b→u tree and b→s,d penguin diagrams and are thus sensitive to New Physics. We present recent results on angular analyses of B→VV decays and searches for very suppressed decay modes.
Antoni Szczurek
(Institute of Nuclear Physics)
23/07/2015, 11:45
We present differential cross sections for Higgs boson and/or
two-photon production from (virtual) Higgs boson within
the formalism of $k_t$-factorization. The off-shell $g^* g^* \to H$
matrix elements are used. We compare results obtained
with infinite top fermion (quark) mass and with finite mass
taken into account. The latter effect is rather small.
We compare results with...
Laura Amelie Zambelli
(High Energy Accelerator Research Organization (JP))
23/07/2015, 11:45
Since 2014, the T2K long-baseline neutrino oscillation experiment in Japan has been running with reversed horn current to produce a beam enhanced in muon antineutrinos. Near detectors located 280 meters from the target study the neutrino interactions prior to the onset of neutrino oscillations. By selecting muon (anti)-neutrino charged current interactions in various channels of pion...
Ivan Polyakov
(ITEP Institute for Theoretical and Experimental Physics (RU))
23/07/2015, 11:45
Its forward acceptance puts the LHCb in a unique position at the LHC to measure QCD phenomena at large rapidities and low transverse momenta, where theoretical models often fail to describe the data accurately. We present new studies of the production of the ϒ meson of the Λb baryon.
Matthias Saimpert
(CEA/IRFU,Centre d'etude de Saclay Gif-sur-Yvette (FR))
23/07/2015, 11:48
The scheduled installation of forward proton detectors at the LHC nearby the CMS and ATLAS experiments will provide a -- somewhat surprising -- opportunity to measure the light-by-light scattering with unprecedented precision by taking advantage of the coherent photon flux emitted by the protons. The detection of the intact protons allows to reconstruct the full kinematic of the event which is...
Marco Meissner
(Ruprecht-Karls-Universitaet Heidelberg (DE))
23/07/2015, 11:50
LHCb's unique forward acceptance and particle-ID capabilities allow for complementary measurements in proton-ion interactions. Latest results are shown and prospects for ion-ion and ion-gas collisions are presented.
Grazia Luparello
(Universita e INFN, Trieste (IT))
23/07/2015, 12:00
Heavy quarks, i.e. charm and beauty, are produced in hard parton scatterings in the initial stages of hadronic collisions. The study of their production in pp collisions at LHC energies provides, therefore, a test of perturbative QCD calculations at the highest collision energies available.
In addition to the heavy-flavour production cross sections, more differential measurements provide...
Sandro Bravar
(Universite de Geneve (CH))
23/07/2015, 12:00
MINERvA (Main INjector ExpeRiment v-A) is a neutrino scattering experiment using the high intensity neutrino beam produced by the Main Injector (NuMI) at Fermilab. MINERvA is making precision cross-section measurements of neutrino interactions with various nuclear targets (C, CH, Fe, Pb) at low and medium energy to study nuclear medium effects with a weak probe.
This talk will present...
Tobias JENKE
(Atominstitut TU Wien)
23/07/2015, 12:00
This talk focuses on two different kinds of gravity tests at short distances using ultracold neutrons within the qBounce experiments.
One class of gravity experiments focuses on the realization of a Quantum Bouncing Ball, i.e. a measurement of the time evolution of a neutron bouncing above a horizontal plane. In 2014, the spatial probability distribution of this Schrödinger wave packet has...
Prof.
Leonard Lesniak
(Henryk Niewodniczanski Institute of Nuclear Physics PAS, Krakow, Poland)
23/07/2015, 12:00
Large CP-violating asymmetry effects in the
B+- --> K+- K+ K- decays have been predicted in the QCD factorization model [1].
The model includes strong K+ K- final-state long-distance interactions in the S-, P-, and also (in the recent analysis) D- wave two-body states.
The S-wave two-body unitarity conditions involve interchannel couplings of the kaon-kaon states with the intermediate...
Andrew Gilbert
(KIT - Karlsruhe Institute of Technology (DE))
23/07/2015, 12:00
This talk will review the status of what has been learned from LHC run-1 about the coupling of the
observed Higgs boson to fermions. The presentation will cover the couplings from the analyses of
final states and initial states like production in association with top quark pairs or single top
quarks. It may also highlight the role of the fermion analyses in latest coupling fits. The talk...
Mariusz Przybycien
(AGH University of Science and Technology (PL))
23/07/2015, 12:06
The measurement of the exclusive gamma+gamma -> ll production cross-section in proton-proton collisions at a centre-of-mass energy of 7 TeV has been carried out by the ATLAS experiment at the LHC, based on an integrated luminosity of 4.6 fb-1. The ratios to the pure QED cross-section predictions are measured in the electron and muon channels and are found to be consistent
with the previous...
Mrs
Olga Rusnakova
(CTU Prague)
23/07/2015, 12:10
The properties of the strongly interacting Quark-Gluon Plasma, created in high energy heavy-ion collisions, can be studied using heavy quarks, such as charm and bottom. Heavy quarks may interact with the medium differently than light quarks. For example, energy losses of the heavy quarks through gluon radiation are expected to be smaller due to the dead cone effect. Therefore, measurements of...
Dr
carlos yaguna
(MPIK, Heidelberg)
23/07/2015, 12:15
We study the impact that future lepton flavor violating experiments will have on the viable parameter space of the scotogenic model. Within this model, the dark matter particle is assumed to be the lightest singlet fermion and two cases are considered depending on how its relic density is obtained: via self-annihilations or via coannihilations with the scalars. For each case, a scan over the...
Alexander Korzenev
(Universite de Geneve (CH))
23/07/2015, 12:15
A precise prediction of the expected neutrino flux is required for a long-baseline accelerator neutrino experiment. The flux is used to measure neutrino cross sections at the near detector, while at the far detector it provides an estimate of the expected signal for the study of neutrino oscillations. Review of recent results of the NA61/SHINE experiment on determination of charged hadron...
Iain Bertram
(Lancaster University)
23/07/2015, 12:15
We present a first study of the inclusive production of the X(4140) state in hadronic collisions. We report the X(4140) production rate and a new measurement of its mass and width. The results of searches for the Zb(10610) and the Zb(10650) using the decay Zb → Υ(nS)π± where Upsilon(nS) → μμ are also presented. Sensitivity to the production of Zb is demonstrated.
We present a measurement of...
Min-Zu Wang
(National Taiwan Univ.)
23/07/2015, 12:15
We present recent measurements of B mesons to 3-body hadronic final states. These measurements test factorization predictions, search for final-state interactions and measure strong interaction amplitudes using Dalitz-plot analysis techniques. The results employ the full Belle dataset and are our final measurements for these modes.
Manfred Jeitler
(Austrian Academy of Sciences (AT))
23/07/2015, 12:24
A search for exclusive or quasi-exclusive W+W- production induced by photon-photon exchange in pp collisions at sqrt(s)=8 TeV is reported using data corresponding to an integrated luminosity of 19.7/fb. Events are selected by requiring the presence of an electron-muon pair with large transverse momentum pT > 30 GeV and no associated charged particles detected from the same vertex. The observed...
Dr
Davide Meloni
(Dipartimento Matematica e Fisica, Universita' Roma Tre)
23/07/2015, 12:30
In this talk I will briefly discuss the present status of models of neutrino mixing, in particular comparing the virtues of Bimaximal Mixing,
corrected by terms arising from the charged lepton mass diagonalization
in SU(5) and SO(10) contexts, to models based on chance, like Anarchy or U(1)_FN.
Paolo Gandini
(University of Oxford (GB))
23/07/2015, 12:30
Its forward acceptance puts the LHCb in a unique position at the LHC to measure QCD phenomena at large rapidities and low transverse momenta, where theoretical models often fail to describe the data accurately. We present new exclusive production studies of ϒ mesons. A first look at the new Run II data and the performance of the new HERSCHEL forward counters may be presented.
Emanuele Angelo Bagnaschi
(DESY Hamburg)
23/07/2015, 12:30
We present the prospects for searches for dark matter after Run 1 of the LHC, based on a global fit in the phenomenological MSSM with 10 parameters (pMSSM10). Particular care has been taken regarding the implementation of the most important limits obtained from the SUSY searches at Run 1 of the LHC. The information from the observed Higgs signal, limits from Higgs searches, as well as...
Diego Stocco
(Laboratoire de Physique Subatomique et des Technologies Associe)
23/07/2015, 12:30
Heavy-flavour hadrons are effective probes of the Quark-Gluon Plasma which is produced in ultra-relativistic heavy-ion collisions.
Heavy quarks (charm and beauty) are produced in the hard scattering processes at the initial stages of the collision and they subsequently traverse the medium, losing energy in the interaction with its constituents.
Heavy-flavour measurements are hence sensitive...
Rainer Mankel
(Deutsches Elektronen-Synchrotron Hamburg and Zeuthen (DE))
23/07/2015, 12:30
While the existence of a Higgs boson with a mass near 125 GeV has been clearly established, the detailed structure of the entire Higgs sector is yet unclear. Besides the Standard Model interpretation, well-motivated models with extended Higgs sectors are being considered. Such options include the minimal and next-to-minimal supersymmetric extensions (MSSM and NMSSM) of the Standard Model, as...
Narei Lorenzo Martinez
(Indiana University (US))
23/07/2015, 12:42
The ATLAS collaboration has carried a set of measurements to test self-interactions of the electroweak gauge bosons. Among these measurements are the production of W or Z bosons in the vector-boson fusion channel and two same-charge W bosons in the vector-boson scattering channel. Furthermore, the first evidence for the production of three gauge bosons has been obtained. Cross sections are...
Alexey Guskov
(Joint Inst. for Nuclear Research (RU))
23/07/2015, 12:45
The electric (${\alpha}_{\pi}$) and the magnetic (${\beta}_{\pi}$) polarisabilities are fundamental properties of the pion characterising the rigidity of its internal structure as a complex QCD system. They have been precisely measured at the
COMPASS experiment at CERN with a ${\pi}^{-}$ beam of 190~GeV/c
assuming ${\alpha}_{\pi}+{\beta}_{\pi}=0$. Muons of the same
momentum were used for...
Prof.
Sankagiri Umasankar
(Indian Institute of Technology Bombay)
23/07/2015, 12:45
We consider a neutrino mass model based on $A_4$ symmetry.
The spontaneous symmetry breaking in this model is chosen to obtain
tribimaximal mixing in the neutrino sector. We introduce $Z_2 \times Z_2$
invariant perturbations in this model which can give rise to acceptable
values of $\theta_{13}$ and $\delta_{CP}$. Perturbation in the charged
lepton sector alone can lead to viable values...
MING-CHUAN CHANG
(FU JEN CATHOLIC UNIVERSITY)
23/07/2015, 12:45
Charmless decays of $B$ and $B_s$ mesons provide nice testing ground for the Standard Model (SM) and excellent probes for physics beyond the SM. The Belle experiment has produced many results in this subject by analyzing the high-statistics event sample of $B$ and $B_s$ meson decays. We present the searches for the two-body charmless rare decays $B^0\to \eta \pi^0$ and $B_s \to K^0 K^0$ using...
Francesco Lo Sterzo
(Academia Sinica (TW))
23/07/2015, 12:45
In this talk the searches of the ATLAS and CMS experiment for additional Higgs boson like resonances
in the WW, ZZ and $\gamma\gamma$ final state, for high masses beyond 125 GeV are summarized. The
searches are based on the full LHC run-1 dataset of each experiment. Upper limits are presented in
the context of an electro-weak singlet extension of the standard model.
Jesper Roy Christiansen
(Lund University (SE))
23/07/2015, 14:30
Recent progress on colour reconnection within the PYTHIA framework
is presented. A new model is introduced, based on the SU(3) structure
of QCD and a minimization of the potential string energy. The
inclusion of the epsilon structure of SU(3) gives a new baryon
production mechanism and makes it possible simultaneously to describe
hyperon production at both ee and pp colliders....
Jan Rusnak
(Nuclear Physics Institute Prague)
23/07/2015, 14:30
Jets represent an important tool to explore the properties of the hot
and dense nuclear matter created in heavy-ion collisions. However,
their reconstruction presents a challenging task due to the extremely
large and fluctuating background that overwhelm the true hard jet
population.
We present recent measurements of charged jets in
Au+Au collisions, by the STAR collaboration at RHIC,...
Francesco Fabozzi
(Universita e INFN, Napoli (IT))
23/07/2015, 14:30
Measurements are presented of t-channel single top quark production in proton-proton collisions at the LHC at centre-of-mass energies of 7 and 8 !TeV, using data collected with the CMS experiment during the years 2011 and 2012. The analyses consider decay channels where the W from the top decays into electron-neutrino or muon-neutrino, and makes use of kinematic characteristics of electroweak...
Julia Harz
(University College London)
23/07/2015, 14:30
With the latest Planck results the dark matter relic density is determined to an unprecedented precision. In order to reduce current theoretical uncertainties in the dark matter relic density prediction, we have calculated next-to-leading order SUSY-QCD corrections to neutralino (co)annihilation processes including Coulomb enhancement effects. We demonstrate that these corrections can have...
Emanuele Angelo Bagnaschi
(DESY Hamburg)
23/07/2015, 14:30
We present the prospects for SUSY searches after Run 1 of the LHC, based on a global fit in the phenomenological MSSM with 10 parameters (pMSSM10). Particular care has been taken regarding the implementation of the most important limits obtained from the SUSY searches at Run 1 of the LHC. The information from the observed Higgs signal, limits from Higgs searches, as well as constraints from...
Andrea Mauri
(UZH)
23/07/2015, 14:30
Many models extending the SM to account for dark matter or explain inflation predict the existence of O(1) GeV mass particles with long lifetimes. LHCb's detection capabilities for detached vertices are exploited to search for particles decaying to muon pairs. New results are presented.
Carlo Giunti
(INFN - National Institute for Nuclear Physics)
23/07/2015, 14:30
I review the experimental indications in favor of short-baseline
neutrino oscillations. I discuss their interpretation in the framework
of neutrino mixing schemes with one or more sterile neutrinos which
have masses around the eV scale. I present arguments in favor of 3+1
neutrino mixing with one sterile neutrino at the eV scale. I discuss
the implications for neutrinoless double-beta...
Osamu Seto
(Hokkai-Gakuen University)
23/07/2015, 14:45
Coherently generated PQ scalar fields could dominate the energy density in the early
Universe and decay into relativistic axions, which would confront with the current
dark radiation constraints. We study the condition that a thermal inflation driven
by a U(1) gauged Higgs field dilutes such axions, in particular, for the case of
gauged B-L symetry.
Nadine Fischer
(KIT - Karlsruhe Institute of Technology (DE)),
Peter Skands
(Monash University (AU)),
Simon Plaetzer
(ITP, Universitaet Karlsruhe),
Stefan Gieseke,
Stefan Kluth
(Max-Planck-Institut fuer Physik (Werner-Heisenberg-Institut) (D)
23/07/2015, 14:45
A study of QCD coherence is presented based on a sample of about
397.000 e$^+$e$^-$ hadronic annihilation events collected at
$\sqrt{s}=91$ GeV with the OPAL detector at LEP. The study is based
on four recently proposed observables that are sensitive to coherence
effects in the perturbative regime. The measurement of these
observables is presented, along with a comparison with the...
Luca Stanco
(Universita e INFN, Padova (IT))
23/07/2015, 14:45
The OPERA experiment has observed muon neutrino to tau neutrino oscillations in the atmospheric sector. Based on this result new limits on the mixing parameters of a massive sterile neutrino have been set. In this talk the analysis performed in the 3+1 neutrino model is presented. The status of the searches for sterile neutrinos performed on LBL experiments is also recalled and...
Teng Jian Khoo
(University of Cambridge (GB))
23/07/2015, 14:45
Despite the absence of experimental evidence, weak scale supersymmetry remains one of the best motivated and studied Standard Model extensions. This talk summarises recent ATLAS and CMS results on inclusive searches for promptly decaying supersymmetric squarks and gluinos in events containing jets, missing transverse momentum with and without light leptons. The results presented utilise 20/fb...
Mario Merola
(Universita e INFN, Napoli (IT))
23/07/2015, 14:48
Measurements of single top quark production in the tW-channel in pp collisions are presented. In the tW-channel a top quark is produced in association with a W boson. The data were collected in the years 2011 and 2012 at centre-of-mass energies of 7 and 8 !TeV. The experimental signature is similar to top pair production, and there is interference at higher orders between the two processes....
Dennis Vadimovich Perepelitsa
(Brookhaven National Laboratory (US))
23/07/2015, 14:50
In relativistic collisions of heavy ions, a hot medium with a high density of unscreened color charges is produced, and jets propagating through this medium are known to suffer energy loss. This results in several distinct effects seen in central heavy ion collisions: the yield of inclusive jets measured via the nuclear modification factor is observed to be strongly suppressed; the yield of...
Sebastian Trojanowski
(National Centre for Nuclear Research, Poland)
23/07/2015, 15:00
Possible discovery of supersymmetric particles in the second run of the LHC accompanied by lack of observation of a dark matter particle in direct searches may point towards dark matter candidates being extremely weakly interacting particles with supersymmetric origin. In this talk I will focus on two such candidates that are well motivated theoretically, namely the axino and the gravitino. In...
Greig Cowan
(University of Edinburgh (GB))
23/07/2015, 15:00
B mesons provides an ideal laboratory for measurements of CP
violation and searches for CPV beyond the Standard Model. Recent
measurements of the mixing phases of the $B_s$ and $B_d$ mesons,
$\phi_s$ and
$\sin{2 \beta}$, using decays to $J\Psi$X final states are presented.
In view of
future improved measurements, a good understanding of pollution from
sub-leading penguin topologies in...
Thorsten Kuhl
(Deutsches Elektronen-Synchrotron Campus Zeuthen (DE))
23/07/2015, 15:00
The ATLAS collaboration has carried out several measurements of
particle production properties and correlations at different pp collisions
centre-of-mass energies.
The production properties of mesons and baryons at sqrt(s)=7 TeV are presented
and compared to predictions. The effects of space-time geometry in the
hadronization phase has been studied in the context of...
Martin Tripiana
(IFAE (ES))
23/07/2015, 15:00
Naturalness arguments for weak-scale supersymmetry favour supersymmetric partners of the third generation quarks with masses not too far from those of their Standard Model counterparts. Top or bottom squarks with masses of a few hundred GeV can also give rise to large direct pair production rates at the LHC. The talk presents recent ATLAS and CMS results from searches for direct stop and...
Pablo del Amo Sanchez
(LAPP-IN2P3-CNRS / Université Savoie Mont Blanc)
23/07/2015, 15:00
Interest in light sterile neutrinos has been recently revived by the
so-called Gallium and reactor neutrino anomalies. In both of them, a
deficit of detected neutrinos was observed with respect to the
expectations. Both anomalies could be explained by the oscillations
of a sterile neutrino introducing an additional $\Delta m^2$ around 1 eV$^2$.
Such oscillations should cause a tell-tale...
Manfredi Ronzani
(Albert-Ludwigs-Universitaet Freiburg (DE))
23/07/2015, 15:06
We present measurements of the cross sections for the two main
production modes of single top quarks in ppbar collisions at a center-of-mass energy of 1.96 TeV in the Run II data collected with the CDF and D0 detector at the Fermilab Tevatron Collider. For this measurement the full data set corresponding to an integrated luminosity of up to 9.7 fb$^{-1}$ per experiment is used. We report...
Nick Ryder
(University of Oxford (GB))
23/07/2015, 15:15
The SoLid experiment intends to search for active-to-sterile anti-neutrino oscillation at very short baseline of the SCK•CEN BR2 research reactor and provide a precise measurement of a high enriched Uranium core, a key ingredient in the calculation of reactor antineutrino flux. It utilises a novel approach to anti-neutrino detection based on a highly segmented detector design. High...
Yue Shi Lai
(Massachusetts Inst. of Technology (US))
23/07/2015, 15:15
Collisions of high-energy nuclei create the hottest and densest matter ever produced in laboratory, and it is a ground for studies of QCD in extreme conditions. When compared to collisions of protons, the contrasts of the jets and hadrons observed in PbPb collisions provide signatures of phenomena that appear in such conditions. One such phenomenon is called ‘jet quenching’ which refers to the...
Michele Lucente
(LPT Orsay)
23/07/2015, 15:15
We consider the possibility of simultaneously explaining Dark Matter and the Baryon Asymmetry of the Universe using different low-scale seesaw realisations involving sterile fermion states (such as right-handed neutrinos), among them minimal realisations of the Inverse seesaw and/or the Linear seesaw. In particular, we discuss the possibility of obtaining a successful leptogenesis in the...
Paula Eerola
(Dept of Physical Sciences, Univ. of Helsinki)
23/07/2015, 15:20
The study of CP violation in the decay channel Bs->Jpsi Phi is very important to explore physics beyond Standard Model in the quark flavour sector. The measurements of Phi_s and the decay width difference (Delta Gamma_s) are key parameters to look for BSM physics. We will report the recent results on these parameters using the 20 fb-1 data set collected in 2012.
Reinhild Peters
(University of Manchester (GB))
23/07/2015, 15:24
We present the most recent measurements of the cross section for pair
and single production of the top quark with the D0 detector at the
Tevatron proton-antiproton collider. Measurements use the full D0
Run II data corresponding to an integrated luminosity of 9.7 fb^-1.
We also discuss the measurements of differential cross section
distributions of top quark pairs in the lepton plus jets channel.
Anthony Morley
(University of Sydney (AU))
23/07/2015, 15:30
Measurements are presented from proton-proton collisions at different centre-of-mass energies in the range of 0.9 to 13 TeV recorded with the ATLAS detector at the LHC. The charged-particle multiplicity, its dependence on transverse momentum and pseudorapidity, and the relationship between the mean transverse momentum and charged-particle multiplicity are measured. The results are corrected...
David Michael Morse
(Northeastern University (US))
23/07/2015, 15:30
The violation of R-parity allows new signatures to be pursued in the search for supersymmetry at the LHC. This talk presents the latest results from the ATLAS and CMS experiment using 20/fb of pp LHC collision data of searches for R-parity violating SUSY scenarios with baryon and lepton number violation. The results presented are for dedicated searches for resonances, as well as a systematic...
Dr
Matteo Agostini
(Technische Universität München & Gran Sasso Science Institute)
23/07/2015, 15:30
The Borexino detector has convincingly shown its outstanding performances in the low energy regime through its accomplishments in the solar and geo neutrinos detection. These performances make it the ideal tool to accomplish a state-of-the-art, source based experiment able to test the long-standing issue of the existence of a sterile neutrino, as suggested by the several anomalous results...
Cristiano Alpigiani
(University of Washington, Seattle)
23/07/2015, 15:35
The large amount of Heavy Flavour data collected by the ATLAS experiment is potentially sensitive to New Physics, which may be found in the mixing of B meson states, or through processes that are naturally suppressed in the Standard Model. We present the new results on the measurement of the decay of the Bs into J/psi phi based on full data collected in LHC Run-1 and with updated flavour...
Jacek Tomasz Otwinowski
(Polish Academy of Sciences (PL))
23/07/2015, 15:40
Recent results on particle production in p--Pb collisions at the LHC
exhibit features that are similar to those observed in Pb-Pb collisions.
This indicates that final-state collective effects might also be present
in small collision systems. In order to quantify the effects, the
transverse momentum spectra (pT) of charged particles, identified
hadrons and jets measured in different...
Katerina Lipka
(Deutsches Elektronen-Synchrotron (DE))
23/07/2015, 15:42
The results of phenomenological studies of top-quark pair production in proton-proton collisions are presented. Differential cross sections are calculated in perturbative QCD at approximate next-to-next-to-leading order ($\alpha_s^4$) by using methods of threshold resummation beyond the leading logarithmic accuracy. Predictions for the single-particle inclusive kinematics are presented for...
Nick Barlow
(University of Cambridge (GB))
23/07/2015, 15:45
This talk presents searches for SUSY models that require specific analysis techniques, such as in the case of compressed scenarios. The talk presents recent results from such searches performed with the ATLAS and CMS detector.
Maxim Eingorn
(urn:Facebook)
23/07/2015, 15:45
The background evolution problem is resolved for the Universe endowed with relic colored objects – quarks and gluons – that survived hadronization either as isolated islands of quark-gluon “nuggets” (QNs), or as a uniform fluid. In the first scenario, QNs can play the role of dark matter. In the second scenario, uniform colored objects can play the role of dark energy providing the late-time...
Dmitry Gorbunov
(Institute for Nuclear Research of the Russian Academy of Sciences / Moscow Institute of Physics and Technology),
Dmitry Gorbunov
(Russian Academy of Sciences (RU))
23/07/2015, 15:45
Supplemented with three right-handed sterile neutrinos the Standard Model can explain neutrino oscillations (active neutrino masses via seesaw type-I mechanism), baryon asymmetry of the Universe (via leptogenesis by sterile-active neutrino oscillations in the primordial plasma) and dark matter phenomenon (by a population of the lightest sufficiently long-lived sterile neutrino). This seems to...
Hans Van Haevermaet
(University of Antwerp (BE))
23/07/2015, 15:45
Several measurements of jet final states are presented performed at
different center-of-mass energies and down to very low pt. The
simultaneous observation of several jets in the same event is
exploited to study for example the angular correlations of Mueller
Navelet jet topologies in order to search for the signature of BFKL
parton dynamics. But multi-jet measurements are also used to...
Damir Devetak
(University of Belgrade (RS))
23/07/2015, 16:30
The observation of long-range two-particle correlations in high energy heavy ion collisions opens the opportunities of exploring novel QCD dynamics in quark gluon plasma (QGP), the hot dense matter created in heavy ion collisions. In particular, such correlations are sensitive to the degree of thermalization in the system. We present selected results from non-identified and identified...
Marco Drewes
(Technische Universitaet Muenchen (DE))
23/07/2015, 16:30
Neutrinos are the only particles in the Standard Model of particle physics that have only been observed with left handed chirality to date. If right handed neutrinos exist, they would not only explain the observed neutrino oscillations, but could also be responsible for several phenomena in cosmology, including the baryon asymmetry of the universe, dark matter and dark radiation. A crucial...
Eleni Ntomari
(Deutsches Elektronen-Synchrotron (DE))
23/07/2015, 16:30
Precision measurements are presented of the top-quark pair inclusive production cross section in proton-proton collisions at the LHC at centre-of-mass energies of 7 !TeV and 8 !TeV. The data are collected with the CMS experiment during the years 2011 and 2012. The analyses include all top quark pair final states with the exception of events with two tau-leptons in the final state. In most...
Antoni Szczurek
(Institute of Nuclear Physics),
Rafal Maciula
(Institute of Nuclear Physics PAN)
23/07/2015, 16:30
We present first results for the $2 \to 4$ single-parton scattering
$g g \to c \bar c c \bar c$ subprocess for the first time fully within
the $k_t$-factorization approach. In this calculation we have used
the Kimber-Martin-Ryskin unintegrated gluon distribution which effectively
includes some class of higher-order gluon emissions, and an off-shell
matrix element squared calculated using...
Dr
Christoffer Petersson
(ULB-Brussels/Chalmers-Gothenburg)
23/07/2015, 16:30
The LHC searches for light compressed stop squarks have resulted in considerable bounds in the
case where the stop decays to a neutralino and a charm quark. However, in the case where the
stop decays to a neutralino, a bottom quark and two fermions via an off-shell W-boson, there is
currently a significant unconstrained region in the stop-neutralino mass plane, still allowing for...
Philipp Frings
(Karlsruhe Institute of Technology)
23/07/2015, 16:30
The CKM angle $\beta$ ($\beta_s$) is one of the key $CP$-violation parameters in the SM. It is best
determined by the mixing-induced $CP$ asymmetry in the decay $B_d\to J/\psi K_S$ ($B_s \to J/\psi \phi$).
However, the theoretical precision of this determination has been under discussion for a long time and the
estimated uncertainties ranged from negligible to sizable.
The possible...
Matthias Hamer
(CBPF - Brazilian Center for Physics Research (BR))
23/07/2015, 16:45
The analysis of the data collected by the major LHC experiments during the LHC Run I has put strong constraints on supersymmetric models. We study the parameter space of the constrained Minimal Supersymmetric Standard Model (CMSSM) in a global fit, taking into account the non-observation of supersymmetry at the LHC, Higgs mass and rate measurements, as well as several cosmological and low...
Basem Khanji
(Universita & INFN, Milano-Bicocca (IT))
23/07/2015, 16:45
The Bd meson oscillation frequency sets strong contraints on
the CKM matrix. A precision measurement using semileptonic decays is
presented.
Sergio Grancagnolo
(Humboldt-Universitaet zu Berlin (DE))
23/07/2015, 16:45
Leptoquarks are hypothetical particles predicted by extensions of the Standard Model, providing an explanation for the similarity between the quark and lepton sectors. Pair-produced scalar leptoquarks have been searched for using final states including leptons and jets. Similar final states are predicted in decays of heavy leptons/neutrinos including Type III neutral/charged leptons as well as...
Marko Bracko
(Jozef Stefan Institute)
23/07/2015, 16:45
The $e^+ e^−$ annihilation process provides an access to the fragmentation functions due to its clean environment. Using the high-statistics dataset accumulated by the Belle detector at the KEKB asymmetric-energy $e^+ e^−$ collider, we report the first measurements of the double differential cross section of identified di-hadrons (pions and kaons) with respect to the two hadron's fractional...
Ulrich Husemann
(KIT - Karlsruhe Institute of Technology (DE))
23/07/2015, 16:48
Differential top quark pair production cross sections are measured in proton-proton collisions at the LHC at centre-of-mass energies of 7 and 8 !TeV, using data collected by the CMS experiment in the years 2011 and 2012. The differential cross sections are measured as functions of various kinematic observables, including the transverse momentum and rapidity of the (anti)top quark and the...
Dr
Jan Fiete Grosse-Oetringhaus
(CERN)
23/07/2015, 16:50
Angular correlations of two and more particles are a sensitive probe of the transport properties of the system produced in heavy-ion collisions. In pp and p-Pb collisions, recent results revealed intriguing long-range correlation structures reminiscent of features observed in heavy-ion collisions. We will show recent results from the analysis of two-particle correlations in pp, p-Pb, and Pb-Pb...
Dr
Surajit Chattopadhyay
(Pailan College of Management and Technology, Kolkata)
23/07/2015, 17:00
Motivated by the work of Yang et al., *Mod. Phys. Lett. A*, **26**, 191 (2011), the present paper reports a study on reconstruction of scalar field dark energy models, namely, quintessence, DBI-essence and tachyon in the framework of chameleon Brans-Dicke cosmology. Firstly, we have reconstructed the Hubble parameter and consequently the density of the new holographic dark energy...
Valentina De Romeri
(CNRS)
23/07/2015, 17:00
A future high-luminosity Z-factory will offer the possibility to study rare Z decays, as those leading to lepton flavour violating final states. Processes such as Z → l∓1 l±2 are potentially complementary to low-energy (high-intensity) observables of lepton flavour violation. We address the impact of new sterile fermions on lepton flavour violating Z decays, focusing on potential searches at...
Per Grafstrom
(Universita e INFN, Bologna (IT))
23/07/2015, 17:00
The total pp cross section is a fundamental parameter of the strong interaction which cannot be calculated in QCD but still can be measured using the optical theorem, which states that the total cross section can be obtained from the extrapolation to t=0 of the differential elastic cross section measured at small four-momentum transfer t.
The ATLAS Collaboration has collected 80 mub-1 of...
Alberto Cervelli
(Universitaet Bern (CH))
23/07/2015, 17:00
The results of supersymmetric searches at the LHC are typically presented in the context of simplified models, with a single specific production channel and decay mode for the supersymmetric particles. In full SUSY models, several production and decay channels are expected, and the limits on supersymmetric particle masses might be weaker. This talk presents the combination of the results from...
Prof.
Sankagiri Umasankar
(Indian Institute of Technology Bombay)
23/07/2015, 17:00
In the time evolution of neutral meson systems, a perfect quantum
coherence is usually assumed. The important quantities of the $B^0_d$
system, such as $\sin 2 \beta$ and $\Delta m_d$, are determined under
this assumption. However, the meson system interacts with its environment.
This interaction can lead to decoherence in the entangled mesons even
before they decay. In our formalism this...
Dr
Marino Romano
(INFN Bologna (IT))
23/07/2015, 17:06
Measurements of the inclusive and differential topquark
pair and singletop
production
cross sections in protonproton
collisions with the ATLAS detector at the Large Hadron
Collider are presented. The inclusive measurements reach high precision and are
compared to the best available theoretical calculations. Differential measurements of the
kinematic properties of the top quark...
Maja Katarzyna Mackowiak-Pawlowska
(Warsaw University of Technology (PL))
23/07/2015, 17:10
The NA61/SHINE experiment aims to discover the critical point of strongly interacting matter and study the properties of the onset of deconfinement by measurements of hadron production properties in proton-proton, proton-nucleus and nucleus-nucleus interactions in the CERN SPS energy range.
In this contribution results on the energy dependence of hadron spectra and yields as well as on...
Keisho Hidaka
(Tokyo Gakugei University)
23/07/2015, 17:15
We compute the decay width of $h^0 \to c \bar{c}$ in the MSSM with quark flavor
violation (QFV) at full one-loop level in the $\overline{\rm DR}$
renormalization scheme. We study the effects of $\tilde{c}-\tilde{t}$ mixing,
taking into account the constraints on QFV from the B meson data. We find that
the full one-loop corrected decay width $\Gamma(h^0 \to c \bar{c})$ is very...
Hans Van Haevermaet
(University of Antwerp (BE))
23/07/2015, 17:15
QCD and Hadronic Physics
Experiments in the upcoming high-luminosity runs at the LHC face the
challenges of very large pile-up. Primary techniques to deal with this are
based on vertexing by trackers. Outside the detector tracking acceptances,
however, lie regions of much interest for a great many aspects of the
LHC physics program. Treatments of pile-up in these regions rely more
strongly on Monte Carlo...
Kristjan Kannike
(Nat. Inst. of Chem.Phys. & Biophys. (EE))
23/07/2015, 17:15
We present a minimal model of inflation where the Planck scale is dynamically generated from dimensionless interactions. The inflaton field $\phi$ gets a vacuum expectation value via dimensional transmutation. The Planck scale is generated via its non-minimal coupling to gravity $\xi\phi^2 R$. To generate the minimum of the inflaton potential, one needs a singlet scalar and new fermion(s)...
Mr
Josu Hernandez
(IFT-CSIC)
23/07/2015, 17:15
We extend the Standard Model with 3 right-handed neutrinos with an approximate lepton number symmetry, which leads to sizable neutrino mixing while generating the neutrino masses and PMNS matrix measured in oscillation experiments.
Constraints on the right-handed neutrino mixing are derived through a global fit to electroweak precision observables. We analyze explicitly the impact of...
Tomonari Miyashita
(Caltech)
23/07/2015, 17:15
The asymmetry between same sign inclusive dilepton samples (l^+l^+ and l^-l^-) from semileptonic B decays in Upsilon(4S) -> B0 B0bar events allows us to compare the B0 mixing probabilities P(B0bar -> B0) and P(B0 -> B0bar), and hence to test T and CP invariance. We present a measurement of CP asymmetry in inclusive dilepton samples using the full BABAR dataset near the Upsilon(4S)...
Olga Bessidskaia Bylund
(Stockholm University (SE))
23/07/2015, 17:24
The large integrated luminosity provided by the LHC enables the production significant
numbers of top quark
pairs in association with addition jets or additional gauge bosons.
The production crosssection
of topquark
pairs in association with jets originating from
additional bquarks
is presented. This process is an important background to searches for
new physics and is compared to the...
Ernesto Arganda
(Universidad de Zaragoza)
23/07/2015, 17:30
The ratio of branching ratios R = BR($H \to b \bar b$)/BR($H \to \tau \bar \tau$) of Higgs boson decays is a powerful tool in order to distinguish the MSSM Higgs sector from non-supersymmetric two Higgs doublet models (2HDM). This ratio receives large renormalization-scheme independent radiative corrections in supersymmetric models at large $\tan\beta$, which are insensitive to the SUSY mass...
Dr
Enrico Fragiacomo
(INFN, Trieste (IT))
23/07/2015, 17:30
Hadronic resonances provide valuable observables for the properties of the hot and dense hadronic phase of the fireball created in heavy-ion collisions, since their lifetimes, of the order of few fm/c, are comparable to the time span between the chemical and kinetic freeze-outs, which characterize the latest stage of the fireball evolution. Re-scattering of decay products and regeneration via...
Markus Roehrken
(California Institute of Technology)
23/07/2015, 17:30
We report on a time-dependent CP violation measurement of B0->D_CP($\star$)h0 decays, where the light neutral hadron h0 is a pi0, eta, or omega meson, and the neutral D meson is reconstructed in decays to two-body CP eigenstates K+ K-, K_S pi0, or K_S omega. The measurement is performed by combining the final data samples of 471 million BBbar pairs collected by the BABAR experiment and 772...
Dr
Roman Nevzorov
(University of Adelaide & ITEP)
23/07/2015, 17:30
In $N=1$ supergravity (SUGRA) supersymmetric (SUSY) and non-supersymmetric
Minkowski vacua originating in the hidden sector can be degenerate. This allows for
consistent implementation of the multiple point principle (MPP) assumption.
We present no--scale inspired SUGRA model where the MPP assumption is realised
at the tree--level without extra fine-tuning. In the supersymmetric phase in...
Diego ARISTIZABAL
(Universite de Liege)
23/07/2015, 17:30
Majorana neutrino masses can originate either at the tree level (type-I, II or III seesaws) or can be radiatively induced. The latter option naturally requires order TeV BSM fields, thus leading to -in principle- testable neutrino mass generation mechanisms. Based on a two-loop systematic classification of the dimension five effective Weinberg operator, in this talk I will discuss the...
Zoltan Laszlo Trocsanyi
(University of Debrecen (HU))
23/07/2015, 17:42
We simulate the hadroproduction of a t tbar pair in association with one or two isolated photons at the LHC using the PowHel program. The generated events are stored according to the Les-Houches event format and constitute an almost inclusive event sample (regarding the photons), so that usual experimental photon isolation can be employed. We interface those events to the PYTHIA shower Monte...
Ankita Mehta
(Panjab University (IN))
23/07/2015, 17:45
Double parton scattering is measured in different channels using the CMS experiment at the CERN LHC. Data from pp collisions collected at 7 and 8 TeV center-of-mass energy are used. Several final states are investigated to identify and measure the signature of double parton scattering in inelastic events. Parameters are extracted from the data that are suited in an optimal way to distinguish...
Dr
Maximiliano Rivera
(Universidad Tecnica Federico Santa Maria)
23/07/2015, 17:45
We discuss some extensions of the Standard Model of particle physics that naturally generate small neutrino masses and provide a dark matter candidate. The symmetry that stabilizes the dark matter suppresses neutrino masses to appear first at higher order in perturbation theory (e.g. 2 or 3-loops). Without the need of very heavy new fields or right-handed neutrinos. In the talk we will...
Iain Bertram
(Lancaster University)
23/07/2015, 17:45
We present the first search for exclusive CPT-violating effects in
the mixing of $B_s^0$ mesons using the full Run II data set with an integrated luminosity of 10.4 fb$^{-1}$ of proton-antiproton collisions collected using the D0 detector at the Fermilab Tevatron Collider. We find no evidence for the CPT-violating effects tested and place limits on CPT- and Lorentz-invariance violating...
gauhar abbas
(IFIC, Valencia)
24/07/2015, 09:00
We perform a complete one-loop computation of {the two-body flavour-violating top decays $t \rightarrow c h$ and $t \rightarrow c V$ ($V= \gamma, Z$),} within the aligned two-Higgs-doublet model. We evaluate the impact of the model parameters on the associated branching {ratios,} taking into account constraints from flavour data and measurements of the {Higgs} properties. Assuming that...
Dr
Matteo Agostini
(Technische Universität München & Gran Sasso Science Institute)
24/07/2015, 09:00
The GERDA experiment searches for the neutrinoless double-beta decay of Ge-76 by operating an array of Ge detectors directly in liquid argon. After a first successful phase of data taking (Phase I), the apparatus is currently being upgraded to double the target mass (up to 38 kg) and to further reduce the background index (<0.001 cts/keV/kg/yr). Results from the on-going hardware...
Prof.
Georg Weiglein
(Deutsches Elektronen-Synchrotron (DE))
24/07/2015, 09:00
The available information on the properties of the observed Higgs signal is assessed in view
of the current experimental accuracy and the employed theoretical assumptions. Possible
interpretations of the observed signal in scenarios of physics beyond the Standard Model are
discussed in view of their phenomenological implications, and the experimental sensitivity
for discriminating between...
Marina Artuso
(Syracuse University (US))
24/07/2015, 09:00
The long standing discrepancies between the measurements of Vub and Vcb in inclusive and exclusive decays are still unresolved. LHCb recently reported the first observation of the baryon decay Λb→pμν and the related measurement of Vub. Similarly, Λb→Λcμν is used to constrain Vcb and the associated form-factors. Future prospected will also be presented.
Manuel Colocci
(Universita e INFN, Bologna (IT))
24/07/2015, 09:00
In ultra relativistic heavy-ion collisions a large and similar amount of nuclei and anti-nuclei is produced in the central pseudorapidity region allowing one to deeply investigate their properties. Mass and electric charge are expected to be the same in nuclei and anti-nuclei as long as the CPT invariance holds for nuclear force, a remnant of the underlying strong interaction between quarks...
Giovanni Abbiendi
(Universita e INFN, Bologna (IT))
24/07/2015, 09:00
The CMS muon system has played a key role for many physics results obtained from the LHC Run-1 data. During the Long Shutdown (2013-2014) significant upgrades have been carried out on the muon detectors and on the L1 muon trigger. In parallel the algorithms for muon reconstruction and identification have been improved for both the High-Level Trigger and the offline reconstruction. Results of...
Chrysostomos Valderanis
(Johannes-Gutenberg-Universitaet Mainz (DE))
24/07/2015, 09:15
The luminosity of the LHC will increase up to 2 and 7x10^34 cm-2s-1 after long shutdowns in 2019 and 2025 (phase-1 and phase-2 upgrades). In order to cope with the increased particle fluxes, upgrades are envisioned for the ATLAS muon spectrometer. At phase-1, the current innermost stations of the ATLAS muon endcap will be upgraded with 2x4-layer modules of Micromega detectors, sandwiched by...
Jan Hladky
(Acad. of Sciences of the Czech Rep. (CZ))
24/07/2015, 09:15
H1 and ZEUS have published single-differential cross sections for
inclusive $D^{\star}$ meson production in deep-inelastic ep scattering at HERA
from their respective final data sets. These cross sections are
combined in the common visible phase space region of photon virtuality
$Q^2> $5 GeV², electron inelasticity $0.02 < y< 0.7$ and the $D^{\star}$ meson's transverse momentum...
Yuri Skovpen
(Budker Institute for Nuclear Physics)
24/07/2015, 09:15
The inclusive electron spectrum from B-meson decays is measured using a sample of 467 million BBbar pairs recorded with the BABAR detector. Contributions from CKM-favored and CKM-suppressed semileptonic B decays, from secondary decays of charm hadrons and from continuum e+e- -> qqbar annihilations are evaluated using a simultaneous fit to data collected at the Y(4S) resonance and at collision...
Olivier Davignon
(Ecole Polytechnique (FR))
24/07/2015, 09:15
With this talk a review will be given for the searches for charged and neutral Higgs bosons, $A$,
$H$, $h$, $H^{+}$, in the context of the MSSM and more general 2HDMs. The result of the ATLAS and
the CMS experiment will be discussed. The searches will be based on the full LHC run-1 dataset of
each experiment.
Dr
Masaya Kohda
(Chung-Yuan Christian University)
24/07/2015, 09:18
With a large amount of top and anti-top quarks produced at the LHC, rare top quark decays offer a nice probe to search for physics beyond the standard model. In this talk, I will discuss about a flavor-changing neutral current (FCNC) decay of the top quark by emitting a new massive gauge boson Z', namely, t --> c Z', based on a model of gauged L_mu - L_tau (the difference between the muon and...
Nestor Armesto Perez
(Universidade de Santiago de Compostela (ES))
24/07/2015, 09:20
The LHeC is a proposed upgrade of the LHC to study ep/eA collisions in the TeV regime, by adding a 60 GeV electron beam through an Energy Recovery Linac. In this talk new results are presented on the physics prospects on energy frontier eA collisions with this machine, with emphasis on the precise determination of nuclear parton densities.
Arantza Oyanguren
(IFIC - Univers. de Valencia)
24/07/2015, 09:30
Precision measurements of the D -> pi e+ nu form factor could shed new light on the persistent difference between inclusive and exclusive measurements of Vub. We report the measurement of the partial branching fraction of D -> pi e+ nu in intervals of the four-momentum-transfer squared from D to pi using 347.2 /fb of integrated luminosity of the BaBar data. The D -> pi form factor is...
Francesco Terranova
(Universita & INFN, Milano-Bicocca (IT))
24/07/2015, 09:30
CUORE (Cryogenic Underground Observatory for Rare Events) is a ton-scale experiment aimed at searching for neutrinoless double beta decay in $^{130}$Te with tellurium oxide bolometers, with a projected sensitivity close to the inverted mass hierarchy region. The CUORE detector design and background budget have been validated by CUORE-0: an array of 52 TeO$_2$ bolometers built using the same...
Panos Kokkas
(University of Ioannina (GR))
24/07/2015, 09:30
Recent results on PDF constraints from CMS are presented.
Rosamaria Venditti
(Universita e INFN, Bari (IT))
24/07/2015, 09:30
For the LHC High Luminosity phase (HL-LHC) the CMS GEM Collaboration is planning to install new large size triple-GEM detectors in the forward region of the muon system (1.5<|η|<2.2) of the CMS detector. The muon reconstruction with triple-GEM chambers information included have been successfully integrated in the official CMS software, allowing physics studies to be carried out. The new...
Vittorio Paolone
(University of Pittsburgh)
24/07/2015, 09:30
DUNE - Deep Underground Neutrino Experiment - plans on using a 34-kton (fiducial mass) liquid argon time projection chamber to be sited at 4850 ft depth at the Sanford Underground Research Facility in South Dakota. The significant overburden at this site gives DUNE significant physics reach for several non-beam physics topics. These include neutrino oscillation studies with atmospheric...
Joseph Boudreau
(University of Pittsburgh (US))
24/07/2015, 09:36
The top quark is the heaviest known fundamental particle and probing its couplings with
the other fundamental particle may open a window to physics beyond the Standard Model.
Searches for flavour changing neutral current top quark decays using the full 2012 ATLAS
dataset are presented. In addition, single top events are used to probe for anomalous
couplings between the top quark and the...
Prof.
Alexander Sorin
(Joint Institute for Nuclear Research, Dubna)
24/07/2015, 09:40
The NICA (Nuclotron-based Ion Collider fAcility) project is now under active realization at the Joint Institute for Nuclear Research (JINR, Dubna). The main goal of the project is an experimental study of hot and dense strongly interacting matter in heavy ion (up to Au) collisions at centre-of-mass energies up to 11 GeV per nucleon. Two modes of the operation is foreseen, collider mode and...
Rebecca Charlotte Lane
(Imperial College Sci., Tech. & Med. (GB))
24/07/2015, 09:40
Searches for Higgs bosons decaying to a pair of Higgs bosons (hh or hA) or for a Higgs boson decaying to Zh/ZA are presented. Different analyses involving Higgs boson decays into bottom-quarks, tau pairs, and diphotons will be summarized in this talk.
Kristin Lohwasser
(Deutsches Elektronen-Synchrotron Campus Zeuthen (DE))
24/07/2015, 09:45
Improved determination of the strange sea distribution in the nucleon is presented. Recent charm production data in neutrino-nucleon deep-inelastic scattering by the NOMAD and CHORUS experiments and from charged current inclusive deep-inelastic scattering at HERA are used. The results are consistent with the data from the ATLAS and the CMS experiments on the associated production of...
Fedor Simkovic
(Comenius University)
24/07/2015, 09:45
The recent progress in theoretical description of the neutrinoless double beta decay (0νββ−decay) is briefly reviewed. A possible effect of nuclear medium on exchange of three light neutrinos is addressed. It is shown that non-standard neutrino interaction generates in-medium Majorana neutrino masses, which influences the 0νββ-decay rate.
Nuclear physics is important for extracting useful...
Robin Glattauer
(Institute of High Energy Physics Vienna)
24/07/2015, 09:45
Semileptonic B meson decays, $B\to X \ell\nu$, are currently the preferred modes for determining the Cabibbo-Kobayashi-Maskawa (CKM) matrix elements $|V_{cb}|$ and $|V_{ub}|$, two fundamental parameters of the Standard Model. At the same time they can also be used to test and refine the theoretical tools used for describing the production of B mesons and their decays. Based on the large data...
Ilya Korolkov
(Universitat Autònoma de Barcelona (ES))
24/07/2015, 09:45
The upgrade of the LHC will bring instantaneous and total
luminosities which are a factor 5-7 beyond the original design of the
ATLAS Liquid Argon (LAr) and Tile Calorimeters and their read-out
systems. Due to radiation requirements and a new two-level hardware
trigger concept the read-out electronics will be improved in two
phases. In Phase-I, a dedicated read-out of the LAr Calorimeters...
Olga Suvorova
(Russian Academy of Sciences (RU))
24/07/2015, 09:50
In April 2015 the deep underwater neutrino telescope Dubna was deployed
and started to take data in Lake Baikal. This array is a first cluster of
the cubic kilometer scale Gigaton Volume Detector (Baikal-GVD), which is
constructed in Lake Baikal. In this contribution we will review the design
and status of the neutrino telescope Dubna.
Zoltan Laszlo Trocsanyi
(University of Debrecen (HU))
24/07/2015, 09:54
We present the computation of the differential cross section for the process pp -> W+ W- b bbar -> e mu b bbar + X at NLO~QCD accuracy matched to Shower Monte Carlo. We include all resonant and non-resonant contributions. This is achieved by fully taking into account the effect of off-shell t-quarks and off-shell W-bosons in the complex mass scheme. We also present a program called DECAYER...
Georges Vasseur
(CEA/IRFU,Centre d'etude de Saclay Gif-sur-Yvette (FR))
24/07/2015, 09:55
We present a search for a light CP-odd Higgs boson (A0) in Upsilon(1S) -> gamma A0, A0 -> ccbar decays. The Upsilon(1S) mesons are selected via the dipion transition Upsilon(2S) -> pi+pi- Upsilon(1S), and the A0 -> ccbar final state is tagged through the reconstruction of various D(*) mesons. No significant signal is observed, and limits on the product branching fraction B(Upsilon(1S) -> gamma...
Vladislav Balagura
(CNRS / IN2P3 / LLR - Ecole Polytechnique (FR))
24/07/2015, 10:00
The CALICE collaboration is developing highly granular calorimeter prototypes to evaluate technologies for experiments at a future lepton collider optimized for particle flow event reconstruction. These technologies include electromagnetic calorimeters with tungsten absorbers and silicon or scintillator active elements, and hadronic calorimeters with steel and tungsten absorbers with...
Eva-Maria Kabuss
(Johannes Gutenberg-Universitat)
24/07/2015, 10:00
The COMPASS experiment at CERN performs a rich program in inclusive (DIS) and
semi-inclusive (SIDIS) deep inelastic scattering of longitudinally polarised
muons off longitudinally polarised nucleons. The main topic is the
investigation of the spin structure of the nucleon in terms
of quark and gluon polarisations. For the extraction of the contribution
of the different quarks flavours...
Barbara Trzeciak
(Czech Technical University in Prague)
24/07/2015, 10:00
The multi-TeV LHC beams offer the possibility to perform the most energetic fixed-target experiments ever, in order to study with high precision pp and pA collisions at $\sqrt{s_{NN}} \simeq 115$ GeV and Pbp and PbA collisions at $\sqrt{s_{NN}} \simeq 72$ GeV. AFTER@LHC -- A Fixed-Target ExperRiment -- can greatly complement collider experiments, in particular those of RHIC and EIC projects....
Paolo Gambino
(università di torino)
24/07/2015, 10:00
The most precise determinations of Vub and Vcb come from semileptonic B decays. The results of the B factories, analysed in the light of the most recent theoretical calculations, are puzzling. For both Vcb and Vub the
determination based on exclusive channels is about 3σ below the one based on inclusive decays.
This discrepancy has survived several checks and may be an indication of new...
Dr
Tomasz Palczewski
(The University of Alabama)
24/07/2015, 10:05
Neutrinos are expected to be produced in hadronic acceleration processes at the sources of extremely high-energy cosmic rays. These high-energy neutrinos should be produced in astrophysical sources like the Gamma Ray Bursts (GRBs), type I b/c supernovae, and Active Galactic Nuclei (AGNs). The expectation for the neutrino flavor ratio at the source is 1: 2: 0 (nu e : nu mu : nu tau). The flavor...
Juan Herrero Garcia
(KTH)
24/07/2015, 10:10
We study lepton flavor violating Higgs decays in the light of the recent enhancement in the τμ channel, which should be confirmed/excluded with data from the second run of the LHC. From an EFT perspective we study both tree-level and loop-level realizations that can in principle accommodate the excess, being at the same time compatible with other low-energy constraints. We also discuss...
Naomi Van Der Kolk
(Max-Planck-Institut fuer Physik (Werner-Heisenberg-Institut) (D)
24/07/2015, 10:15
The highly granular calorimeter prototypes of the CALICE collaboration have provided large data samples with precise three-dimensional information on hadronic showers with steel and tungsten absorbers and silicon, scintillator and gas detector readout. From these data sets, detailed measurements of the spatial structure, including longitudinal and lateral shower profiles and of the shower...
Katerina Lipka
(Deutsches Elektronen-Synchrotron (DE))
24/07/2015, 10:15
The impact of recent measurements of heavy-flavour production in deep inelastic ep scattering and in pp collisions on parton distribution functions is studied in a QCD analysis in the fixed-flavour number scheme at next-to-leading order. Differential cross sections of charm- and beauty-hadron production measured by LHCb are used together with inclusive and heavy-flavour production cross...
Marta Calvi
(Univ. degli Studi Milano-Bicocca)
24/07/2015, 10:20
The decay B→D*τν is sensitive to new physics and its rate exhibits a hint of deviation from the SM expectation. LHCb presents its first measurement of this mode.
Antoni Szczurek
(Institute of Nuclear Physics),
Mariola Jadwiga Klusek-Gawenda
(Polish Academy of Sciences (PL))
24/07/2015, 10:20
We present, for the first time, differential distributions for two $\rho^0$ meson
production in exclusive ultraperipheral, ultrarelativistic collisions
via a double scattering mechanism. The calculations are done in the impact
parameter space. The cross section for $\gamma A \to \rho^0 A$ is
parametrized based on an existing calculation. Smearing of $\rho^0$ masses
is taken into account....
Theodota Lagouri
(Yale University (US))
24/07/2015, 10:25
This talk will summarize the searches for exotic Higgs boson decays. It should cover decays of the
observed Higgs boson to dark sector bosons, lepton flavor violating and flavor changing decays, and
decays to a light pseudoscalar neutral Higgs boson as predicted by the NMSSM. Prospects for the LHC
run-2 should be given. The talk should cover the results from ATLAS and CMS.
Achim Geiser
(Deutsches Elektronen-Synchrotron Hamburg and Zeuthen (DE))
24/07/2015, 10:30
The combined HERA data on charm production in deep inelastic scattering have recently
been used to determine the charm quark running mass $m_c(m_c)$ in the $\overline{MS}$ renormalisation
scheme. The same data are used differentially as a function of the photon virtuality
Q² to evaluate the charm quark running mass at different scales to one-loop order. The scale
dependence of the mass is...
Mr
Vasily Mikhaylov
(Nuclear Physics Institute of ASCR)
24/07/2015, 10:30
The design and performance of the hadron calorimeters developed for the future high energy nuclear physics experiments at FAIR, NICA, and CERN will be discussed. The Projectile Spectator Detector (PSD) for the CBM experiment at the future FAIR facility, the Forward Calorimeter for the NA61 experiment at CERN and the Multi Purpose Detector at the future NICA facility are reviewed. These...
Mr
Thomas Rauh
(TU Munich)
24/07/2015, 10:30
A threshold scan of top-pair production at a future linear collider
allows to determine several standard model parameters with very high
precision. The recent completion of the third-order QCD corrections
to the inclusive top-pair production cross section demonstrates that
strong dynamics are under control. We investigate effects from
P-wave production and Higgs contributions at third...
Prof.
George W.S. Hou
(National Taiwan University)
24/07/2015, 10:35
The recent IceCube astrophysical PeV neutrino events motivate the
planning of the Neutrino Telescope Array (NTA) observatory, which
will have three site stations watching the air mass surrounded by
Mauna Loa, Mauna Kea, and Hualalai on Hawaii Big Island, plus a
site station at the center watching the lower night sky.
By separating nu_tau -> tau conversion from tau-shower...
Philipp Hamer
(Goettingen)
24/07/2015, 10:35
Semileptonic and leptonic B meson decays involving a heavy $\tau$ lepton are sensitive to new physics scenarios with an extended Higgs sector, such as the type-II two-Higgs-doublet model. Decays that have been studied at Belle include $B\to D^{(*)}\tau\nu$ , $B\to \tau\nu$ and $B\to \pi\tau\nu$. In this talk we report new and updated results for these modes, based on the large data sample...
Prof.
Khaled Abdel-Waged
(Physics Department-Umm Al-Qura University- Saudi Arabia)
24/07/2015, 10:40
A simple basic model for describing proton-nucleus collisions has been the intra-nuclear cascade model, where the interactions are simulated by a sequence of binary nucleon-nucleon collisions. This model helped to establish many scientific concepts and also creates the foundation for more modern simulation codes, especially at low and intermediate energies. In this paper, we present a new...
Johannes Bluemlein
(DESY)
24/07/2015, 10:45
A survey is presented on the calculation of the 3-loop QCD corrections to the heavy flavor Wilson coefficients in deep-inelastic scattering in the region of large momentum transfer $Q^2 \gg m^2$ and on the 3-loop matching coefficients in the variable flavor number scheme. Results are presented for the flavor non-singlet and pure singlet cases and for contributions due to Feynman diagrams...
Antoine Chapelain
(Cornell University)
24/07/2015, 10:45
We present the design of the uTCA-based waveform digitizers that will instrument the electromagnetic calorimeters deployed for the E989 Muon g-2 experiment at Fermilab. Each uTCA advanced mezzanine card (AMC) consists of a custom made 5-channel 12-bit 800 MSPS digitizer with dedicated 1Gbit memory buffers. The digitizer communicates with the CMS designed AMC13 module to receive the...
Julia Harz
(University College London)
24/07/2015, 10:45
Interactions that manifest themselves as lepton number violating processes at low energies in combination with sphaleron transitions typically erase any pre-existing baryon asymmetry of the Universe. We demonstrate in a model independent approach that the observation of neutrinoless double beta decay would impose a stringent constraint on mechanisms of high-scale baryogenesis, including...
Henning Kirschenmann
(CERN)
24/07/2015, 11:30
Measurements of the top quark mass are presented using data collected by the CMS experiment in proton-proton collisions at the LHC at centre-of-mass energies of 7 and 8 TeV. Analyses in several decay channels of top quark pair events are employed to determine the top quark mass. The results are combined and compared to the world average.
Francesca Calore
(University of Amsterdam)
24/07/2015, 11:30
Unveiling the nature of dark matter is one of the biggest challenges of particle physics and cosmology. Beside direct detection and collider experiments, it is possible to look for a dark matter signal through indirect searches whose goal is to disentangle the signal from particle dark matter annihilation or decay from the large astrophysical background. I will discuss messengers and targets...
Robert Samuel Thorne
(University College London (UK))
24/07/2015, 11:30
We present the MMHT2014 PDFs, an update of the previous major release in the same framework, i.e. MSTW2008. We discuss the changes in both the central values and uncertainties in the PDFs due to changes in theoretical procedures and the impact of new, largely LHC data-sets. We note, however, that changes in predictions are rather small. We discuss the correlation between the PDFs and the...
Miguel Arratia
(University of Cambridge (GB))
24/07/2015, 11:30
The measurement of centrality and pseudorapidity dependence of the $p_{T}$-integrated flow harmonics, $v_{2}$ up to $v_{5}$, in Pb+Pb collisions at $\sqrt {s_{NN}}$=2.76 TeV with the ATLAS detector at the LHC are presented. These measurements give a clear picture of the average geometry as well as fluctuations in it. These measurements are extended to include the correlations between flow...
Jessica Lynn Leonard
(Deutsches Elektronen-Synchrotron Hamburg and Zeuthen (DE))
24/07/2015, 11:30
The beam monitoring and luminosity systems of the CMS experiment are enhanced by several new and upgraded sub-detectors to match the challenges of the LHC operation and physics program at increased energy and higher luminosity. A dedicated pixelated luminosity telescope is installed for a fast and precise luminosity measurement. This detector measures coincidences between several three-layer...
Florian Fraenkle
(Karlsruhe Institute of Technology)
24/07/2015, 11:30
A model independent, direct way to measure the neutrino masses is the investigation of the kinematics of single $\beta$-decay via a precise measurement of the $\beta$-decay electron energy spectrum close to the endpoint. This talk will present the current status of two experiments intending to use this method by measuring the $\beta$-spectrum of tritium.
The KArlsruhe TRItium Neutrino...
Thomas Peiffer
(Hamburg University (DE))
24/07/2015, 11:30
We present an update of the global electroweak fit using electroweak next-to-next-to-leading order (NNLO) calculations for all precision observables that enter the fit. The availability of NNLO corrections allows for the first time the inclusion of realistic estimates of theoretical uncertainties due to missing higher order calculations. The knowledge of the mass of the Higgs boson improves...
Voica Ana Maria Radescu
(Ruprecht-Karls-Universitaet Heidelberg (DE))
24/07/2015, 11:45
The uncertainties of protons parton distribution functions (PDFs) play a dominant role for the precision tests of the Standard Model (SM) and they also impact substantially the theory predictions of Beyond SM high mass production. We present the HERAFitter project which provides a unique open-source software framework for the determination of the proton's PDFs and for the interpretation of...
Regina Caputo
(University of California, Santa Cruz)
24/07/2015, 11:45
The era of precision cosmology has revealed that ~80% of the total amount of matter in the universe is dark. Cosmic microwave background measurements, galactic rotation curves, and gravitational lensing each provide strong evidence for the existence of dark matter. One promising candidate, motivated by both Particle Physics and Astrophysics, is the Weakly Interacting Massive Particle (WIMP)....
Costas Fountas
(University of Ioannina (GR))
24/07/2015, 11:45
The CMS Level-1 Trigger from Run 1 is being replaced with an entirely new system which is based on large FPGAs, 10 Gbps optical links and it is based on the uTCA technology. This platform allows for new trigger algorithms whose sophistication approaches those of higher level triggers. Whilst the new trigger will be operational early in 2016, elements of it will be installed already in 2015....
Stephan Scholl
(Eberhard Karls Universitaet Tuebingen)
24/07/2015, 11:45
The Electron Capture in 163Ho experiment, ECHo, is designed to investigate the electron neutrino mass in the sub-eV range by means of the analysis of the calorimetrically measured spectrum following the electron capture in 163Ho. Arrays of low temperature metallic magnetic calorimeters (MMCs), read-out using microwave SQUID multiplexing, will be used in this experiment. With a first MMC...
Oleg Brandt
(Ruprecht-Karls-Universitaet Heidelberg (DE))
24/07/2015, 11:48
The top quark mass is one of the fundamental parameters of the Standard Model. The
latest ATLAS measurements of the top quark mass are presented. A measurement using
lepton+jets events is presented, where a multidimensional
template fit is used to constrain
the uncertainties on the energy measurements of jets. The measurement is combined with
a measurement using dilepton events. In...
Prof.
George W.S. Hou
(National Taiwan University)
24/07/2015, 11:50
We do not violate the Grossman-Nir (GN) bound per se, but point out that the commonly perceived current GN bound of B(KL --> pi0 nu nu(bar)) < 1.4 x 10^-9 can be evaded, if a weakly interacting narrow state falls into the windows of kinematic exclusion of the K+ --> pi+ nu nu(bar) experiments. An explicit example is a Z' boson motivated by the muon g-2 anomaly and linked with flavor physics....
Jana Crkovska
(FNSPE CTU Prague)
24/07/2015, 11:50
The hadronic collective flow was found to be one of the most pronounced signatures of the Quark-Gluon Plasma (QGP), the hot and dense matter created in the collisions of relativistic heavy ions.
The azimuthal distribution of detected hadrons can be expanded into a Fourier series over the azimuthal angle, the flow harmonics are then represented by the Fourier coefficients.
In semi-peripheral...
G. Carrillo-Montoya
(CERN)
24/07/2015, 11:55
The discovery of the Higgs boson opens many perspectives to explore physics beyond the Standard Model.
This talk describes constraints of new physics in a number of models using the combined measurements
of the coupling strength of the 125 GeV Higgs particle using the entire ATLAS run-I data. The various
models presented include an additional real electroweak singlet, two Higgs doublet...
Nikolas Zimmermann
(Rheinisch-Westfaelische Tech. Hoch. (DE))
24/07/2015, 12:00
Precision measurements by the Alpha Magnetic Spectrometer on the
International Space Station of the primary cosmic-ray electron flux in
the range 0.5 to 700 GeV and the positron flux in the range 0.5 to 500
GeV are presented. The electron flux and the positron flux each require
a description beyond a single power-law spectrum. Both the electron flux
and the positron flux change their...
Voica Ana Maria Radescu
(Ruprecht-Karls-Universitaet Heidelberg (DE))
24/07/2015, 12:00
The new combined inclusive HERA cross sections were input to QCD
analyses at NNLO, NLO and LO providing a new set of parton
distribution functions, HERAPDF2.0. Besides the small experimental
uncertainties, model and parameterisation uncertainties were also
considered. The consistency of data and the QCD fit was tested for
variants of the fit such as the treatment of heavy flavour...
Patrick Czodrowski
(University of Alberta (CA))
24/07/2015, 12:00
The ATLAS trigger system has been used successfully for data collection in the 2009-2013 Run 1 operation cycle of the CERN Large Hadron Collider (LHC) at center-of-mass energies of up to 8 TeV. With the restart of the LHC for the new Run 2 data-taking period at 13 TeV, the trigger rates are expected to rise by approximately a factor of 5. The trigger system consists of a hardware-based first...
Boris Tuchming
(CEA Saclay)
24/07/2015, 12:06
We report most recent measurements of the mass of the heaviest known
standard model particle, the top quark, performed by the D0 experiment at the
Fermilab Tevatron Collider. We present measurements in the lepton+jet and
dilepton decay channels. For these measurements the full D0 data set
corresponding to an integrated luminosity of 9.7 fb$^{-1}$ is used. We also
discuss a measurement of...
Gyulnara Eyyubova
(Czech Technical University (CZ)), Mr
Ponimatkin Georgij
(Ostrov Industrial High School (CZ))
24/07/2015, 12:10
Heavy-flavour quarks are predominantly produced in hard scattering on a short time-scale and traverse the
medium interacting with its constituents, thus they are one of the effective probes of the transport properties of the medium formed in relativistic heavy ion collisions. On the other hand, the thermal production of heavy-flavour quarks in quark-gluon plasma is itself of interest.
In...
Gavin Davies
(Imperial College Sci., Tech. & Med. (GB))
24/07/2015, 12:10
Combined constraints from the CDF and D0 Collaborations on models of the Higgs boson with exotic spin J and parity P are presented and compared with results obtained assuming the standard model value $J^P = 0^+$. Both collaborations analyzed approximately 10 fb$^{−1}$ of proton-antiproton collisions with a center-of-mass energy of 1.96 TeV collected at the Fermilab Tevatron. They combined...
Dr
Sushant Raut
(KTH Royal Institute of Technology)
24/07/2015, 12:15
Standard neutrino oscillation physics has entered the era of
precision measurements. With a large value of $\theta_{13}$ having
been measured, the remaining unknowns yet to be determined are the
mass hierarchy, CP violation and the octant of $\theta_{23}$.
The main problem in determining these parameters is the problem
of parameter degeneracy.
T2K, NOvA, SK, IceCube and the reactor...
Paul Seyfert
(Universita & INFN, Milano-Bicocca (IT))
24/07/2015, 12:15
The LHCb detector consists of subsystems designed to perform high efficiency tracking (>95%) with an excellent momentum resolution (0.5% for p<20 GeV). Two Ring Imaging Cherenkov detectors provide precise particle identification.
In Run II of the LHC, a new scheme for the LHCb software trigger allows splitting the triggering of the event in two stages, giving room to perform the alignment...
Ali Khorramian
(IPM and Semnan University)
24/07/2015, 12:15
We present a comparative analysis of the non-perturbative intrinsic
charm quark contribution in the proton, using the inclusive production
of $\gamma +c $-jet in $ pp $ and $ p\bar{p} $ collisions and for the
kinematic regions that are sensitive to this contribution. We discuss
the $ Q^2 $ evolution of intrinsic quark distributions and present a code that provide these distributions as...
Mr
Yen-Hsun Lin
(Institute of Physics, National Chiao Tung University, Taiwan)
24/07/2015, 12:15
We study the thermal transport occurring in the system of solar captured dark matter (DM) and explore its impact on the DM indirect search signal.
We particularly focus on the scenario of self-interacting DM (SIDM). The energy flows in and out of the system include the gravitational capture via DM-nucleon and DM-DM scatterings, the energy dissipation via DM annihilation, and the heat...
Riccardo Fantechi
(INFN - Sezione di Pisa)
24/07/2015, 12:20
We report the first observation of the very rare decay K+- -> pi+- pi0 e+ e- by the NA48/2 experiment. From a clean sample of almost 2000 reconstructed signal events, we have determined the branching fraction with high precision and measured the e+ e- invariant mass distribution, which allows to differentiate between different decay models.
Jan Kieseler
(Deutsches Elektronen-Synchrotron (DE))
24/07/2015, 12:25
Measurements of the top quark mass employing alternative methods are presented using data collected by the CMS experiment in proton-proton collisions at the LHC in the years 2011 and 2012 at centre-of-mass energies of 7 and 8 TeV. The alternative methods include the use of endpoint distributions as well as the study of possible model dependencies of the top mass measurement on the event...
Philippe Calfayan
(Ludwig-Maximilians-Univ. Muenchen (DE))
24/07/2015, 12:25
This talk will summarize the latest results of searches for the decay of the observed Higgs boson
into invisible and quasi-invisible states. The talk should cover the results of the ATLAS and the
CMS experiment based on the full dataset of LHC run-1.
Sascha Caron
(Nikhef National institute for subatomic physics (NL))
24/07/2015, 12:30
Observations with the Fermi Large Area Telescope (LAT) indicate an excess in gamma rays originating from the center of our Galaxy. A possible explanation for this excess is the annihilation of Dark Matter particles. We have investigated the annihilation of neutralinos as Dark Matter candidates within the phenomenological Minimal Supersymmetric Standard Model (pMSSM). An iterative particle...
Johanna Gramling
(Universite de Geneve (CH))
24/07/2015, 12:30
Physics collisions at 13 TeV are expected at the LHC with an average of 40-50 proton-proton collisions per bunch crossing. Tracking at trigger level is an essential tool to control the rate in high-pileup conditions while maintaining a good efficiency for relevant physics processes. The Fast TracKer (FTK) is an integral part of the trigger upgrade for the ATLAS detector. For every event...
Katarzyna Wichmann
(Deutsches Elektronen-Synchrotron Hamburg and Zeuthen (DE))
24/07/2015, 12:30
An extendend QCD analysis of the new combined inclusive HERA was
performed at NLO, also including HERA data on jet and charm production.
This enables the simultaneous measurement of parton distribution
functions and the strong coupling using data from HERA alone. The strong
coupling is measured to be $\alpha_s(M_Z)$= 0.1182 ±0.0008(exp) ±0.0005(model/param.) ±0.0012(hadronisation)...
Harri Niemi
(University of Jyväskylä)
24/07/2015, 12:30
One of the main goals in heavy ion collision experiments at relativistic energies is to determine the properties, like viscosity, of nearly thermalized strongly interacting matter. The dynamics of the system formed in these collisions is, however, complex and the matter properties reflect into the experimental observables in a non-trivial way. Therefore, it is essential to have a good...
Dr
amarjit soni
(Brookhaven National Lab)
24/07/2015, 12:35
Recent publication [arXiv:1505.07863 by RBC and UKQCD Collaborations] of the first lattice QCD calculation of the complex kaon decay amplitude A0 with physical kinematics, using a single 323 x 64 domain wall ensemble is discussed. Approximate agreement with the experimental value for Re(A0) is obtained.. The calculated value of Im(A0) is used to...
Abdollah Mohammadi
(Kansas State University (US))
24/07/2015, 12:40
A search is performed on the 8 TeV LHC data for additional scalars and pseudoscalar with masses below the newly discovered higgs boson h(125). These searches are motivated within several BSM theories, most significantly extensions of the non mininal extensions of the MSSM like the NMSSM, where additional scalar and pseudoscalar states are expected. The mass range from 350 MeV to 110 GeV is...
Francesco Crescioli
(Centre National de la Recherche Scientifique (FR))
24/07/2015, 12:45
The Fast TracKer (FTK) trigger project is an upcoming upgrade for the
ATLAS trigger system currently under installation. A first reduced-coverage FTK
is expected to participate in data taking by the end of 2015, while full detector coverage will be
reached in 2016 and more processing power will be added in 2017-2018.
The ATLAS FTK is a dedicated supercomputing processor based on FPGAs...
Linda Cremonesi
(Queen Mary University of London)
24/07/2015, 12:45
Hyper-Kamiokande (HK) is a megaton scale water Cherenkov detector proposed to be built in Japan. HK is the logical continuation of the highly successful program of neutrino physics and proton decay searches using a water Cherenkov technique. HK will study the CP asymmetry in neutrino oscillations using the neutrino and anti-neutrino beams produced at J-PARC. With an exposure of 7.5 MW x 10^7...
Juan Rojo Chacon
(University of Oxford (GB))
24/07/2015, 12:45
I present NNPDF3.0, the first set of parton distribution functions (PDFs) determined
with a methodology validated by a closure test. NNPDF3.0 uses a global dataset including HERA-II deep-inelastic inclusive cross-sections, the combined HERA charm data, jet production from ATLAS and CMS, vector boson rapidity and transverse momentum distributions from ATLAS, CMS and LHCb, $W$+$c$ data from...
Enrico Maria Sessolo
(NCBJ, Warsaw)
24/07/2015, 12:45
We present prospects for detection of WIMP dark matter at the Cherenkov Telescope Array (CTA). We derive a realistic assessment of the sensitivity of CTA to photon fluxes from dark matter annihilation by means of a binned likelihood analysis for the Einasto and Navarro-Frenk-White halo profiles. We use the most up to date instrument response functions and background simulation model provided...
Christoph Niehoff
(Excellence Cluster Universe, Munich)
24/07/2015, 12:50
We present an analysis of the rare exclusive $B$ decays $B\to K\nu\bar\nu$ and $B\to K^{\star}\nu\bar\nu$ within the Standard Model (SM), in a model-independent manner, and in a number of new physics (NP) models. Combining new form factor determinations from lattice QCD with light-cone sum rule results and including complete two-loop electroweak corrections to the SM Wilson coefficient, we...
Ayan Paul
(INFN, Sezione di Roma)
24/07/2015, 14:30
The question of the validity of analyzing charmed meson decays to pairs of hadrons within the SU(3) framework has been long and often debated. While there are convincing arguments that small breaking of this symmetry can accommodate for the current experimental results, the inability to compute QCD effects in these modes render it quite impossible to justify with complete authority the...
Benedikt Vormwald
(Hamburg University (DE))
24/07/2015, 14:30
The present CMS pixel detector designed for a luminosity of 10^34 cm-2s-1 will have to be replaced at the end of 2016. The new upgraded detector will have higher tracking efficiency and lower mass with four barrel layers and three forward/backward disks to provide a hit coverage up to absolute pseudo-rapidities of 2.5. In a second stage, in order to maintain its physics reach during the high...
Alexander Karlberg
(University of Oxford (GB))
24/07/2015, 14:30
I will present fully differential NNLO corrections to vector-boson
fusion (VBF) Higgs production at hadron colliders, in the limit in which
there is no cross-talk between the hadronic systems associated with the
two protons.The result is obtained by combining an inclusive NNLO
calculation in the structure-function approach and a suitably factorised
NLO VBF Higgs plus 3-jet...
Gudrid Moortgat-Pick
(University of Hamburg/DESY)
24/07/2015, 14:30
We study SUSY models in the context of LHC searches
and LHC
exclusion bounds and explore models in the parameter range that may be
accessible at future colliders.
We study in particular the impact of precision measurements of
masses, cross sections and further observables, for instance as
forward-backward asymmetries, to determine the fundamental SUSY parameters
for dark matter...
Vyacheslav Galymov
(Universite Claude Bernard-Lyon I (FR))
24/07/2015, 14:30
A giant (10-50 kt) liquid argon TPC has been proposed as the detector for an underground observatory for the study of neutrino oscillations, neutrino astrophysics and proton decay.
This detector has excellent tracking and calorimetric capabilities much superior to currently operating neutrino detectors.
LBNO-DEMO (WA105) is a large demonstrator of the double phase liquid argon TPC based...
Antoni Szczurek
(Institute of Nuclear Physics)
24/07/2015, 14:30
$W^+ W^-$ production is one of the golden channels for testing the
Standard Model as well as for searches beyond the Standard Model.
We discuss many new subleading processes for inclusive production of
$W^+ W^-$ pairs not included in the literature so far.
We focus on photon-photon induced processes.
We include elastic-elastic, elastic-inelastic, inelastic-elastic
and...
Florian Reindl
(Max-Planck-Insitute for Physics Munich)
24/07/2015, 14:30
While the presence of dark matter in the universe was verified by observations on various astronomical scales, the nature of dark matter still remains a puzzling question. The most favored solution is the existence of Weakly Interacting Massive Particles (WIMPs). Experiments around the globe search for WIMPs; one of them is CRESST aiming to directly detect WIMPs scattering off nuclei in...
Ilya Komarov
(Ecole Polytechnique Federale de Lausanne (CH))
24/07/2015, 14:45
The very first Run II LHC data allows LHCb to measure the cross-sections for quarkonia, beauty and charm productions. Results should be available quickly thanks to the new "Turbo" stream procedure allowing the analysis of particle candidates selected at trigger level without the need of offline reconstruction. First results are presented, conditional on LHC machine operation.
Dirk Zerwas
(Laboratoire de l'Accelerateur Lineaire (FR))
24/07/2015, 14:45
CMS and ATLAS search for the presence of dark matter particles in missing energy + X final states, where X signals the production in association with jets, photons and gauge bosons. The results of these searches place stringent limits on on the cross sections of interactions of dark matter with light and heavy flavor quarks and gluons. They are interpreted in terms of simplified models with...
Michael Thomas Alexander
(University of Glasgow (GB))
24/07/2015, 14:45
LHCb has collected the world's largest sample of charmed hadrons. This sample is used to search for direct and indirect CP violation in charm, and to measure D0 mixing parameters. New updated measurements from several decay modes are presented, with complementary time-dependent and time-integrated analyses. We report on recent measurements of CP asymmetries in D→KK and D→ππ decays using the...
Maurizio Bonesini
(Sezione INFN, Dipartimento di Fisica G. Occhialini, Universita' Milano-Bicocca)
24/07/2015, 14:45
The detection of vacuum ultraviolet (VUV) radiation emitted by ionizing particles in large liquid Argon (LAr) or Xenon Time Projection chambers (TPCs ) is of key relevance in experimental neutrino or dark matter search. Typical schemes use photodetectors coated with down-conversion dyes, such as tetraphenyl butadiene (TPB). The development of large-area waveguides based on TPB is, however,...
Karolos Potamianos
(Lawrence Berkeley National Lab. (US))
24/07/2015, 14:45
The upgraded Pixel detector and the commissioning of the Inner Detector
tracking of the ATLAS experiment for Run-2 at the Large Hadron collider.
Run-2 of the LHC will provide new challenges to track and vertex
reconstruction with higher energies, denser jets and higher rates.
Therefore the ATLAS experiment has constructed the first 4-layer Pixel
detector in HEP, installing a new Pixel...
Senka Duric
(University of Wisconsin (US))
24/07/2015, 14:48
The recent multiboson measurements from CMS are interpreted in terms of constraints on anomalous triple and quartic gauge couplings.
Giulia Casarosa
(Sezione di Pisa (IT))
24/07/2015, 15:00
In the future Belle II experiment at the SuperKEKB collider in
Tsukuba, Japan, charged particle tracking in the vicinity of the $e^+$ $e^-$ interaction point is provided by a two-layer silicon pixel detector based on the novel DEPFET technology (PXD) and by a four-layer silicon strip detector (SVD). In this presentation, we review the technology and the design of these two devices, and...
Manfred Kraus
(RWTH Aachen)
24/07/2015, 15:00
We give a short review of the shower concept, first introduced by Nagy and Soper, that includes full quantum correlations in the shower evolution. We also state the current status of implementation of the
publicly available shower program Deductor. However, the main focus of the talk will be the matching of the shower at next-to-leading order within the MC@NLO formalism. Matching is necessary...
Mr
Arsenii Titov
(SISSA/INFN)
24/07/2015, 15:00
Establishing the status of the CP symmetry in the lepton sector is one of the major goals of the programme of future research in neutrino physics. In the reference 3-neutrino mixing scheme CP-violating effects in neutrino oscillations can be caused by the Dirac CP violation phase $\delta$ present in the $3\times3$ unitary neutrino mixing matrix $U$. Using the fact that $U = U_e^\dagger U_\nu$,...
antoine cazes
(Université Claude Bernard Lyon I)
24/07/2015, 15:00
The EDELWEISS experiment is dedicated to the direct detection of Dark Matter. The current setup – EDELWEISS-III – aims at exploring a spin-independent WIMP-nucleon cross section down to the $10^{-9}$pb range, and extend the coverage for masses below 20 GeV. Since July 2014, the collaboration is taking data with 24 state-of-the-art cryogenic FID800 Germanium detectors installed in the radio...
Maurizio Martinelli
(Ecole Polytechnique Federale de Lausanne (CH))
24/07/2015, 15:00
LHCb has collected the world's largest sample of charmed hadrons. Recently many searches for CP violation have focused on analysing the Dalitz phase space. New results and novel techniques are presented.
Dr
Andreas Goudelis
(HEPHY - Vienna)
24/07/2015, 15:00
The Inert Doublet Model (IDM) is one of the simplest extensions of the Standard Model that can provide a viable dark matter (DM) candidate. Despite its simplicity, it predicts a versatile phenomenology both for cosmology and for the Large Hadron Collider. I will present the status of searches for IDM dark matter in direct DM detection experiments and the LHC, focusing on the impact of the ...
Laurent Chevalier
(CEA/IRFU,Centre d'etude de Saclay Gif-sur-Yvette (FR))
24/07/2015, 15:06
Measurements diboson production cross sections in proton-proton interactions at 7 and 8 TeV are reported from the ATLAS experiment. The cross section results are measured in phase space regions defined by the decay kinematics and then extrapolated to the full phase spaces. Cross sections for WV (V=W or Z) production in the leptonic or semileptonic channels are compared to (N)NLO predictions...
Zoltan Laszlo Trocsanyi
(University of Debrecen (HU))
24/07/2015, 15:15
We compute the fully differential decay rate of the standard model
Higgs boson to a b-quark pair at NNLO accuracy. We use a general
subtraction scheme developed for computing QCD jet cross sections in
perturbation theory. The double real and real-virtual contributions to
the second order radiative corrections, regularized by subtractions,
are finite in four space-time dimensions and their...
Prof.
Emilio Ciuffoli
(IMP, CAS)
24/07/2015, 15:15
The determination of the value of θ13, which turned out to be considerably larger than the expected, opened the way to the measurement of the CP violating phase δ in the leptonic sector. We consider the following experimental setup: a 800MeV proton beam hits a target at a single site, creating μ antineutrinos via μ decay at rest; the electron antineutrinos produced by oscillations interact...
Hidetoshi Otono
(Kyushu University (JP))
24/07/2015, 15:15
It has been widely known that bino-like dark matter in the supersymmetric theories in general suffers from over-production. The situation can be drastically improved if gluinos have a mass slightly heavier than bino as they reduce the dark matter abundance through coannihilation. We consider such a bino-gluino coannihilation in high-scale SUSY models. In this scenario, gluinos have long...
Alexander Kish
(Physik-Institut UZH)
24/07/2015, 15:15
Detectors based on noble gases are a very efficient and promising technology which leads the active field of dark matter searches.
The XENON collaboration aims at a direct detection of dark matter with experiments based on liquid xenon. The XENON100 detector, which is being operated at the Gran Sasso Underground Laboratory in Italy, is a dual-phase time-projection chamber with a 62 kg target...
Mark Richard James Williams
(CERN)
24/07/2015, 15:15
The upgrade of the LHCb experiment, planned for 2019, will transform the experiment to a trigger-less system reading out the full detector at 40 MHz event rate. All data reduction algorithms will be executed in a high-level software farm. The upgraded detector will run at luminosities of 2 x 1033 /cm2/s and probe physics beyond the Standard Model in the heavy flavour sector with...
Denis Derkach
(University of Oxford (GB))
24/07/2015, 15:15
We update the analysis of D meson mixing including the latest
experimental results as of May 2015. We derive constraints on the parameters M12, Gamma12 and Phi12 that describe D meson mixing
using all available data, allowing for CP violation. We also provide posterior distributions for observable parameters appearing in D physics.
Phillip Russell Dudero
(Texas Tech University (US))
24/07/2015, 15:24
We present studies of different multiboson final states in pp collisions at 8 TeV center-of-mass energy based on data recorded by the CMS detector at the LHC. These include precise measurements of W and Z production in association with a photon, diphoton,WW,WZ and ZZ as well as triboson production productions.
Josef Pradler
(Austrian Academy of Sciences (AT))
24/07/2015, 15:30
Dark matter detectors built primarily to probe elastic scattering of WIMPs on nuclei are also precise probes of light, weakly coupled particles that may be absorbed by the detector material. Ensuing constraints on the minimal model of dark matter comprised of long-lived vector states V (dark photons) in the 0.01-100 keV mass range are presented. The absence of an ionization signal in direct...
Blake Dean Leverington
(Ruprecht-Karls-Universitaet Heidelberg (DE))
24/07/2015, 15:30
The LHCb detector will be upgraded during 2019 in order to collect data from proton-proton collisions at the LHC at
higher instantaneous luminosities and to read out the data at 40MHz using a trigger-less read-out system. All
front-end electronics will be replaced and several sub-detectors must be redesigned to cope with the higher
occupancy. The current tracking detectors downstream of the...
Eric Baussan
(Institut Pluridisciplinaire Hubert Curien (FR))
24/07/2015, 15:30
For the lepton CP violation discovery very intense neutrino beams are needed produced using very powerful proton beams. The proposed project, ESSnuSB, is based on the European Spallation Source proton linac the construction of which started in 2014 and will finish by 2023. This linac will have a power of 5 MW producing protons of 2 GeV energy. The combination of the high beam intensity and the...
Sebastian Buchta
(IFIC Valencia)
24/07/2015, 15:30
The Loop-Tree Duality (LTD) is a novel perturbative method in QFT that establishes a relation between loop–level and tree–level amplitudes, which gives rise to the idea of treating them simultaneously in a common Monte Carlo. Initially introduced for one–loop scalar integrals, the applicability of the LTD has been expanded to higher order loops and Feynman graphs beyond simple poles. For the...
Amandeep Kaur Kalsi
(Panjab University (IN))
24/07/2015, 15:30
Results for SUSY searches in the electroweak sector are summarized, based on ̃20 fb-1 of 8 TeV proton-proton collisions collected by the CMS and ATLAS detector. A variety of complementary final state signatures and methods are used to probe gaugino and slepton production, including compressed scenarios. This talk includes the latest CMS results from the first ever search for SUSY production...
Lailin Xu
(Brookhaven National Laboratory (US))
24/07/2015, 15:42
The ATLAS Collaboration has carried out the analysis of the inclusive four-lepton lineshape measurement using data corresponding to 20.3 fb−1 of integrated luminosity from proton-proton collisions at √s= 8 TeV at the LHC collected with the ATLAS detector. The study focuses on the differential cross section as a function of the 4-lepton mass spectrum ranging from 80 to 1000 GeV where several...
Mr
Ulrich Ellwanger
(LPT, University Paris-Sud)
24/07/2015, 15:45
A light singlino in the NMSSM can reduce considerably the missing transverse
energy at the end of sparticle decay cascades. This happens when the NLSP
(typically bino-like) decays into a light singlino plus a Higgs boson with a
mass just below the NLSP mass. This Higgs boson can be the SM-like Higgs,
or a lighter NMSSM-specific Higgs boson. When such a scenario is realised,
upper bounds...
German Sborlini
(IFIC-Valencia)
24/07/2015, 15:45
Loop-tree (LT) duality allows to express virtual contributions in terms of phase-space integrals, thus leading to a direct comparison with real radiation terms. In this talk, we review the basis of the method and describe its application to regularize Feynman integrals. Performing an integrand-level combination of real and virtual terms, we show that it is possible to recover physical results...
Dr
Sushant Raut
(KTH Royal Institute of Technology)
24/07/2015, 15:45
Non-standard interactions (NSI) of neutrinos arise in various models of physics beyond the Standard Model. These interactions affect the oscillations of neutrinos and can therefore be probed by long-baseline experiments. In this work, we study the possibility of probing NSI at the source and detector using the proposed superbeam experiment at the ESS facility (ESSnuSB).
ESSnuSB has been...
Pit Vanhoefer
(MPI Munich)
24/07/2015, 15:45
We present recent CP violation studies in B decays sensitive to the interior angles of the unitarity triangle in the Kobayashi-Maskawa scheme, $\phi_2 (\alpha)$ and $\phi_3 (\gamma)$. In addition, we present an updated CP-asymmetry measurement in charm meson decays. All measurements are based on the high statistics data set accumulated by the Belle detector at the KEKB asymmetric-energy e+e− collider.
Deb Sankar Bhattacharya
(CEA/IRFU,Centre d'etude de Saclay Gif-sur-Yvette (FR))
24/07/2015, 15:45
The International Large Detector (ILD) is one of the detector concepts at the ILC where calorimetry and tracking systems are combined. The tracking system consists of a Silicon vertex detector, forward tracking disks and a large volume Time Projection Chamber (TPC). R&D for a Micro Pattern Gaseous Detector (MPGD) TPC has been carried out within the framework of LC-TPC collaboration. Beam...
Juan Jose Sanz-Cillero
(Universidad Autonoma de Madrid)
24/07/2015, 16:30
The existence of a spectrum of composite resonances is a common feature of strongly interacting beyond-Standard-Model scenarios.
In this talk we compute the contributions from spin-0 and and spin-1 resonances to the low-energy EW non-linear effective theory (with the EW Goldstones non-linearly realized). We study the contributions to both the purely bosonic terms and to higher-dimension...
Martin Bessner
(Deutsches Elektronen-Synchrotron Hamburg and Zeuthen (DE))
24/07/2015, 16:30
Isolated prompt photons provide a direct probe of short-distance physics, complementary to that provided by measurements of jets or vector-bosons and are sensitive to the gluon density of the proton. The inclusive prompt photon cross sections have been measured by the ATLAS collaboration at 7 and 8 TeV pp collision centre-of-mass energies, over a wide range of transverse momenta. The diphoton...
Alessandra Tonazzo
(APC)
24/07/2015, 16:30
The neutrino community has been debating on how to assess the potential of future oscillation experiments for determining the neutrino Mass Hierarchy and for establishing CP violation in the leptonic sector. A review of some basic concepts and of the approach chosen by different projects to present their results will be shown. The key issues relevant for the future will be discussed.
Chun-Khiang Chua,
Gwo-Guang Wong
(Chung Yuan Christian University)
24/07/2015, 16:30
We construct a generic model of Majorana fermion dark matter (DM). Starting with two Weyl spinor multiplets $\eta_{1,2}$ having quantum numbers $(I,\mp Y)$ coupled to the standard model (SM) Higgs, six additional Weyl spinor multiplets with $(I\pm 1/2, \pm(Y\pm 1/2))$ are needed in general. It has 13 parameters in total, five mass parameters and eight Yukawa couplings.
The DM sector of the...
Etam Noah Messomo
(Geneva university)
24/07/2015, 16:30
In the T2K experiment, the far detector, Super-Kamiokande, observes neutrino interactions on water while the near detectors are mainly constituted of plastic. The uncertainty due to the difference of target materials is one of major systematic uncertainties in the T2K neutrino oscillation analyses. A new neutrino detector named WAGASCI has been developed to measure the cross section ratio of...
Paride Paradisi
(U. di Valencia)
24/07/2015, 16:30
Lepton Flavour Violating (LFV) processes remain among the best candidates to unveil NP effects. In this talk, I summarize LFV predictions of well motivated NP scenarios and the perspectives of detecting LFV signals in ongoing and upcoming experiments.
Antonio Policicchio
(INFN Cosenza)
24/07/2015, 16:45
The latest CMS and ATLAS searches for signatures with anomalously large ionization are presented. The findings are interpreted in terms of the production of new particles with a fractional or multiple value of the charge of the electron, the production of high mass stable charged particles, the presence of magnetic monopoles that lead to unusual ionization interactions with matter or the...
Prof.
Wei Wang
(Sun Yat-Sen University)
24/07/2015, 16:45
The Jiangmen Underground Neutrino Observatory (JUNO) is a multipurpose neutrino experiment aiming to determine the neutrino mass hierarchy and precisely measure the neutrino oscillation parameters by detecting reactor antineutrinos at ~53 km baselines using a 20-kiloton liquid scintillator detector placed at 1800-m.w.e deep underground. JUNO is also capable of observing supernova neutrinos,...
Prof.
Dmitry Grigoriev
(Budker Institute of Nuclear Physics (RU))
24/07/2015, 16:50
Lepton flavour violation (LFV) is currently one of the most exciting branches of particle physics. The flavour violating process of the neutrinoless decay of a positive muon to a positron and a gamma is strongly suppressed in the Standard Model, hence it is a very sensitive probe of new physics beyond the Standard Model. The MEG experiment searches for this process at the Paul Scherrer...
Markus Zinser
(Johannes-Gutenberg-Universitaet Mainz (DE))
24/07/2015, 17:00
The inclusive production of W and Z bosons as well the off-shell Z/gamma* production are standard candles at hadron colliders. The measurement of their production cross-sections can be compared to theory calculations at NNLO QCD and have an impact on our knowledge of the parton densities of the proton. Run-1 studies carried out by the ATLAS Collaboration are reviewed and first LHC Run-2...
Juan Herrero Garcia
(KTH)
24/07/2015, 17:00
I will discuss halo-independent tests of direct detection signals that we have derived in two recent works. In the first part [based on 1502.03342], I will discuss a halo-independent lower bound on the DM capture rate in the Sun from a direct detection signal, with which one can set limits on the branching ratios into different channels from the absence of a high-energy neutrino flux in...
Andrew Evan Hart
(Ohio State University (US))
24/07/2015, 17:00
Searches for long-lived, weakly-interacting particles have been performed with the ATLAS and CMS detectors.
The search strategies have been developed to cover a range of lifetime and mass for such particles by exploiting techniques to reconstruct decay vertices in various detector components. This talk summarizes searches for long-lived particles including supersymmetric interpretations and...
Paul Richard Newman
(University of Birmingham (GB))
24/07/2015, 17:00
The LHeC is a proposed upgrade of the LHC to study ep/eA collisions in the TeV regime, by adding a 60 GeV electron beam through an Energy Recovery Linac. A detector is under design for high precision measurements which may be readily installed by its modular structure.
The talk presents the main concepts and progress in the simulation, including an extension to the FCC-he configuration.
Thomas Ehrhardt
(Uni Mainz)
24/07/2015, 17:00
The world's largest neutrino telescope, the IceCube Neutrino Observatory, is built in one of the planet’s most extreme environments at South Pole Station Antarctica. Completed in 2010, and instrumenting more than a cubic-kilometre of ice, IceCube has been designed to measure the flux of astrophysical neutrinos it recently discovered. It also comprises a low-energy detector array, called...
Markus Roehrken
(Cal Tech)
24/07/2015, 17:05
The Mu2e Experiment at Fermilab will search for coherent, neutrinoless
conversion of muons into electrons in the field of a nucleus with a
sensitivity improvement of a factor of 10,000 over previous experiments.
Such a lepton flavor-violating reaction probes new physics at a scale
inaccessible with direct searches at either present or planned high energy
colliders. The experiment...
Debarati Roy
(Saha),
Debarati Roy
(Saha Institute of Nuclear Physics (IN))
24/07/2015, 17:15
Recent results on jets measurements as well as jet properties and jet variables are presented.
Dr
Thierry PRADIER
(IPHC)
24/07/2015, 17:15
Since the measurement of the mixing angle theta_13, the determination of the neutrino
mass hierarchy (normal vs. inverted) has become one of the central challenges of neutrino
physics, together with the search for CP violation in the leptonic sector. Recent studies
have pointed out that the neutrino mass hierarchy can be investigated in the atmospheric
neutrino sector, in the energy...
Alfredo Davide Ferella
(Stockholm University)
24/07/2015, 17:15
XENON1T has a design sensitivity for spin-independent WIMP-nucleon cross section a factor 100 below the XENON100 best limit, reachable by early 2018. Another order of magnitude can be achieved in a very cost effective and rapid realization building and installing in the same XENON1T vacuum cryostat a new detector with more than twice the liquid xenon mass and with even lower background:...
Mr
Philipp Lösel
(LMU Munich)
24/07/2015, 17:15
Micromegas (MICRO MEsh GAseuos Structures) are used in a broad field of applications due to their excellent spatial resolution and single plane track reconstruction capability. They consist of three active planes, a cathode, a micro-mesh and a strip anode with 0.45 mm modularity. The distance of the micro-mesh from the cathode being typically 5 mm is large in contradiction to the tiny distance...
Nicolas Arnaud
(LAL (CNRS-IN2P3))
24/07/2015, 17:15
Searches for new phenomena, including dark photons, long-lived particles and the EDM of the tau lepton, have been performed at the BABAR, Belle and LHCb collaboration. This talk presents these searches, highlighting the most recent results.
Hajime Nishiguchi
(KEK)
24/07/2015, 17:20
The COMET Experiment at J-PARC aims to search for the lepton-flavour violating (LFV) process of muon to electron conversion in a muonic atom, $\mu^{-}N \rightarrow \mathrm{e}^{-}N$, with a branching-ratio sensitivity of $6 \times 10^{−17}$, which is 4 orders of magnitude better than the present upper limit.
Complemental searches for two kinds of muon LFV decay modes,...
Maurizio Bonesini
(Sezione INFN, Dipartimento di Fisica G. Occhialini, Universita' Milano Bicocca, Italy)
24/07/2015, 17:30
Development of fast scintillators, such as Pr:LuAg or Ce:GAAG crystals, has been put forward in the framework of Time-of-Flight (TOF) Positron Emission Tomography (PET). These crystals have fast primary decay time (20-90 ns), high density and a fairly high light output (up to 57000 photons/MeV). The fact that they have higher densities and are not hygroscopic, as compared to Ce:LaBr3, points...
Dr
Vasiliki Mitsou
(IFIC Valencia (ES))
24/07/2015, 17:30
The MoEDAL experiment (Monopole and Exotics Detector at the LHC) is designed to directly search for magnetic monopoles and other highly ionising stable or metastable particles arising in various theoretical scenarios beyond the Standard Model. Its physics goals --largely complementary to the multi-purpose LHC detectors ATLAS and CMS-- are accomplished by the deployment of plastic nuclear track...
Pavel Starovoitov
(Ruprecht-Karls-Universitaet Heidelberg (DE))
24/07/2015, 17:30
Several aspects of jet production in pp collisions have been measured by the ATLAS collaboration.
The momentum-weighted sum of the charges of tracks associated to a jet is sensitive to the electrical charge of the parton initiating the jet. The distribution of the so-called jet charge has been measured in dijet events using pp collision data at 8 TeV with the ATLAS detector.
The...
Rok Pestotnik
(Jozef Stefan Institute)
24/07/2015, 17:45
Particle identification at the Belle II experiment at the SuperKEKB collider in Tsukuba, Japan, is provided by two Cherenkov imaging devices, the time of propagation (TOP) counter in barrel (RICH with quartz radiator) and the ARICH in the endcap regions (RICH with aerogel radiotor). In this presentation, we review the technology and the design of these two devices, and describe the current...
Elena Graverini
(Universitaet Zuerich (CH))
24/07/2015, 17:45
SHIP is a new general purpose fixed target facility, whose Technical Proposal has been recently submitted to the CERN SPS Committee. In its initial phase, the 400GeV proton beam extracted from the SPS will be dumped on a heavy target with the aim of integrating $2\times 10^{20}$ pot in 5 years. A dedicated detector, based on a long vacuum tank followed by a spectrometer and particle...
Giovanni De Lellis
(Universita e INFN, Napoli (IT))
24/07/2015, 17:45
SHIP is a new general purpose fixed target facility, whose Technical Proposal has been recently submitted to the CERN SPS Committee. In its initial phase, the 400GeV proton beam extracted from the SPS will be dumped on a heavy target with the aim of integrating $2\times 10^{20}$ pot in 5 years. A dedicated detector downstream the target will allow to probe a variety of models with light...
Roger Barlow
(University of Manchester)
24/07/2015, 17:50
We present measurements of the branching fraction for the radiative tau leptonic decays: tau -> gamma l nu nubar, where the lepton is either a muon or an electron. The results are obtained from an analysis of the complete BABAR data-set consisting of 430 million tau-lepton pairs, corresponding to an integrated luminosity of 468 fb^-1, collected at the PEP-II asymmetric energy e+e- collider at SLAC.
Jordi Garra Tico
(University of Cambridge (GB))
25/07/2015, 09:00
The angle γ is the least constrained parameter in the CKM unitarity triangle. Its determination in decays induced by tree-level b→c and b→u transitions is largely unaffected by potential new physics contributions. This allows for a consistency check of the unitarity triangle, but also of comparisons with γ determinations from modes with loop-diagrams. LHCb' γ combination for CKM 2014 already...
Brieuc Arnaud L Francois
(Universite Catholique de Louvain (UCL) (BE))
25/07/2015, 09:00
We will discuss the early Run II performance of the CMS Pixel and Strip Tracker, with the detector operating cold for the first time. The startup conditions at 13 TeV for both subdetectors will be summarised, including specifics for 50ns and 25ns operations and improvements in calibrations which were developed during 2013 and 2014. The impact of the Tracker alignment based on cosmic and...
Roger Barlow
(University of Huddersfield (GB))
25/07/2015, 09:00
LHCb has a unique capability to separate beauty and charm jets. We present recent results on jet tagging performance, W+b,c jets and the observation of the top quark in the forward acceptance at the LHC.
Dr
Denis Klevers
(CERN)
25/07/2015, 09:00
Non-Perturbative Field Theory and String Theory
talk
F-theory provides a geometric framework for engineering non-perturbation string vacua that have proven fruitful for the construction of GUT models for particle phenomenology. Its power in reliably extracting the physics of the strongly coupled string theory relies on the power of algebraic geometry. F-theory provides a dictionary between algebro-geometric properties of elliptically fibered...
Wojtek Fedorko
(University of British Columbia)
25/07/2015, 09:00
Many new physics scenarios beyond the Standard Model predict the presence of narrow or broad resonances decaying to a pair of quarks/gluons, charged/neutral leptons, photons and their combinations, or a multi-jet final state. Non-resonant excess in tails of mass and transverse momentum distributions is another strong indication of new physics. This talk highlights recent ATLAS searches on new...
David Kaplan
25/07/2015, 09:00
I will talk about my experience giving public lectures and making the 2014 documentary, Particle Fever, in the context of how it affected me, my research, my perspective on our field and our responsibility. Then I'll show a video clip - let's call it an outtake from the film.
Vladimir Shiltsev
(Fermilab)
25/07/2015, 09:01
Particle colliders for high-energy physics have been in the forefront of scientific discoveries for more than half a century. The accelerator technology of the colliders has progressed immensely, while the beam energy, luminosity, facility size, and cost have grown by several orders of magnitude. The method of colliding beams has not fully exhausted its potential but has slowed down...
Wenbin Qian
(Centre National de la Recherche Scientifique (FR))
25/07/2015, 09:15
Decays of b-hadrons to states including open charm provide a rich laboratory to constrain the unitarity matrix and search for new physics. We present recent measurements in this sector, including first observations of orbitally excited D mesons, measurements of their spin, mass and decay widths.
Stefan Groot Nibbelink
25/07/2015, 09:15
Non-Perturbative Field Theory and String Theory
talk
We discuss recent investigations of constructions of non-supersymmetric models in string theory. We start from the non-supersymmetric heterotic SO(16)xSO(16) in ten dimensions and describe its compactification on smooth and singular manifolds. We show that it is possible to get models that look quite similar to the Standard Model of particle physics. However, understanding the cosmological...
Barbara Clerbaux
(Inter-University Institute for High Energies (BE))
25/07/2015, 09:15
Many new physics scenarios beyond the Standard Model predict the presence of narrow or broad resonances decaying to a pair of quarks/gluons, charged/neutral leptons, photons and their combinations, or a multi-jet final state. Non-resonant excess in tails of mass and transverse momentum distributions is another strong indication of new physics. This talk highlights recent CMS searches on new...
Alessandro Di Girolamo
(CERN)
25/07/2015, 09:15
The ATLAS Distributed Computing infrastructure has evolved after the first
period of LHC data taking in order to cope with the challenges of the
upcoming LHC Run2. An increased data rate and computing demands of the
Monte-Carlo simulation, as well as new approaches to ATLAS analysis,
dictated a more dynamic workload management system (ProdSys2) and data
management system (Rucio),...
Tom Neep
(University of Manchester (GB))
25/07/2015, 09:18
The top quark is unique among the known quarks in that it decays before it has an
opportunity to form hadronic bound states. This makes measurements of its properties
particularly interesting as one can access directly the properties of a bare quark.
Measurements of the charge asymmetry in topquark
pair events are presented. The
measurements use both the 7 and 8 TeV ATLAS datasets and...
Ms
Silke Zollinger
(Science & Technology Facilities Council)
25/07/2015, 09:20
In particle physics researchers work at small scales within projects, but are also part of a larger scale within a collaboration. In the same way, researchers can be part of both small scale Public Engagement activities and large scale programs. No matter the scale, the principles of successful Public Engagement are the same: a work cycle that includes strategy, planning, implementation, and...
Mr
Andreas Gerhardus
(Bethe Center for Theoretical Physics, Universität Bonn)
25/07/2015, 09:30
Non-Perturbative Field Theory and String Theory
talk
Two-dimensional gauged linear sigma models with $N=(2,2)$ supersymmetry are a powerful tool for studying the worldsheet theories of type II string compactifications. We construct a certain class of non-abelian gauged linear sigma models that exhibit an interesting phase structure emerging from non-Abelian strong coupling dynamics. The observed phase structure leads to a duality proposal...
Maikel de Vries
(Mainz University)
25/07/2015, 09:30
The robustness of translating effective operator constraints to BSM theories crucially
depends on the mass and coupling of BSM particles. This is especially relevant for hadron colliders where the partonic centre of mass energy is around the typical energy scales of natural BSM theories. The caveats in applying the limits are discussed using Z and G models, illustrating the effects for a...
Fulvia De Fazio
(INFN Bari)
25/07/2015, 09:30
I discuss the predictions of models based on an extended gauge group on several rare B decays, focusing in particular on the correlations among flavour observables. Two cases are considered in details: models introducing a new Z' gauge boson and the Randall Sundrum model with custodial protection.
Philip Nicholas Burrows
(University of Oxford (GB))
25/07/2015, 09:31
The Compact Linear Collider (CLIC) project explores the possibility of constructing a future multi-TeV linear electron-positron collider for high energy frontier physics post LHC. The CLIC-concept is based on high gradient normal-conducting accelerating structures. The RF power for the acceleration of the colliding beams is produced by a two beam acceleration scheme, where power is extracted...
Carlos Lacasta Llacer
(IFIC-Valencia)
25/07/2015, 09:35
The Educational ALIBAVA System (EASY) is a compact and portable system for lecturing sensor instrumentation at university teaching laboratories. EASY tests and readouts a silicon micro-strip sensor. The front-end electronics is based on a low noise ASIC with 128 input channels.
Semiconductor devices are widely used as radiation sensors in many scientific and industrial applications. They are...
Frank Sebastian Roscher
(KIT - Karlsruhe Institute of Technology (DE))
25/07/2015, 09:36
Measurements are presented of the properties of top quarks in pair production from proton-proton collisions at the LHC. The data were collected at pp centre-of-mass energies of 7 and 8 !TeV by the CMS experiment during the years 2011 and 2012. The charge asymmetry is measured using the difference of the absolute rapidities of the reconstructed top and anti-top kinematics, as well as from...
Dr
Bjorn Herrmann
(Unite Reseaux du CNRS (FR))
25/07/2015, 09:45
We present an extensive study of non-minimally flavour violating (NMFV) elements in the Lagrangian of the Minimal Supersymmetric Standard Model (MSSM). We impose a variety of theoretical and experimental constraints and perform a detailed scan of the parameter space by means of a Markov-Chain Monte-Carlo (MCMC) setup. To our knowledge, this represents the first study of several non-zero...
Dr
Eugenio Megias
(Max-Planck-Institut fur Physik, Munich)
25/07/2015, 09:45
Non-Perturbative Field Theory and String Theory
talk
The time evolution of the energy transport triggered in a strongly coupled quantum critical system by a temperature gradient is holographically related to the evolution of an asymptotically AdS black brane with a gradient in its planar horizon. Of relevance in these systems is the appearance of a universal steady state, described by a boosted thermal state. A relevant observable that provides...
Franz Muheim
(University of Edinburgh (GB))
25/07/2015, 09:45
During the LHC Run 1 the LHCb experiment has successfully performed a large number of world-class precision measurements in heavy flavour physics by having collected over 3 fb-1 at centre-of-mass energies of 7 TeV and 8TeV. However, even after an additional expected integrated luminosity of 5 fb-1 in Run 2, many of the LHCb measurements will remain limited by statistics. The current 1 MHz...
Ivan Marchesini
(Hamburg University (DE))
25/07/2015, 09:45
This talk presents searches for new phenomena in signatures with a pair of top-quarks, a top and bottom-quark, together with searches for fermionic top/bottom partners (VLQs). ATLAS and CMS results from Run-1 and Run-2 (if available) will be presented together with their interpretations, with a view to the reconstruction techniques used in the searches.
Clara Nellist
(LAL-Orsay (FR))
25/07/2015, 09:50
The ATLAS collaboration has recently setup three projects targeting citizen science or specific communities :
The goal of the HiggsML project was to bring particle physicists and data scientist together by a “challenge”: compete online to obtain the best Higgs to tau tau signal significance on a set of ATLAS fully simulated signal and background. The challenge ran from May to September...
Ulrich Husemann
(KIT - Karlsruhe Institute of Technology (DE))
25/07/2015, 09:54
We present recent measurements based on $t\bar t$ production in both the lepton+jets and dilepton channels using the D0 detector at the Fermilab Tevatron Collider. In both channels we measure angular distributions to extract the ttbar production forward-backward asymmetry and the top polarization in different basis. The full Run II D0 data sample corresponding to 9.7 fb$^{-1}$ of integrated...
Guido Martinelli
(Scuola Int. Superiore di Studi Avanzati (IT))
25/07/2015, 10:00
During the last 15 years, B-physics facilities have been giving enormous contributions to the consolidation of the Standard Model (SM) in the flavour sector. New analyses flowing from the LHC experiments, in particular LHCb, are now providing unprecedented insights into CKM metrology and new evidences for rare decays. The CKM picture can be tested with great precision, and very precise SM...
Prof.
Elias Kiritsis
(University of Crete and APC)
25/07/2015, 10:00
Non-Perturbative Field Theory and String Theory
talk
Time-dependent perturbations of states in a 3+1 dimensional confining gauge theory are considered in the context of holography. The perturbations are induced by varying the gauge theory's coupling of a dimension three scalar operator in time. The dual gravitational theory belongs to a class of Einstein-dilaton theories which exhibit a mass gap at zero temperature and a first order deconfining...
Shilpi Jain
(National Central University (TW))
25/07/2015, 10:05
Hints of new physics in B-physics sector have lead to considerable interests on the flavor physics and lepton flavor violating (LFV) observables at the LHC. Searches for LFV decays of the Standard Model particles or new heavy particles have been conducted at the ATLAS and CMS experiment. This talk summarizes Run 1 searches for LFV phenomena and new physics in multi-lepton/photon final states....
Jonatan Piedra Gomez
(Universidad de Cantabria (ES))
25/07/2015, 10:13
Several measurements of top quark properties in top quark decays are presented using data collected by the CMS experiment during the years 2011 and 2012. The polarization of W bosons in top quark decays is measured. The W-boson helicity fractions and angular asymmetries are extracted and limits on anomalous contributions to the Wtb vertex are determined. Furthermore, searches for...
Péter Pósfay
(Wigner Research Centre for Physics)
25/07/2015, 10:15
Non-Perturbative Field Theory and String Theory
talk
Functional renormalization group (FRG) is an exact method for taking
into account the effect of quantum fluctuations in the effective action of the
system. The FRG method applied to effective theories of nuclear matter yields
equation of state witch incorporates quantum fluctuations of the fields.
Using the local potential approximation the equation of state for Walecka-type
models of...
Dr
Jeanette Miriam Lorenz
(Ludwig-Maximilians-Univ. Muenchen (DE))
25/07/2015, 10:15
We present a software framework for statistical data analysis, called *HistFitter*,
that has been used extensively by the ATLAS Collaboration to analyze big datasets
originating from proton-proton collisions at the Large Hadron Collider at CERN.
Since 2012 HistFitter has been the standard statistical tool in searches for supersymmetric
particles performed by ATLAS.
HistFitter is a...
Lorenzo Basso
(Institut Pluridisciplinaire Hubert Curien (FR))
25/07/2015, 10:20
The LHC discovery potential of heavy top partners decaying into a top quark and a Z boson is studied in the trilepton channel at 13 TeV in the single production mode. The clean multilepton final state allows to strongly reduce the background contaminations and to reconstruct the T' mass. We show that a simple cut-and-count analysis probes the parameter space of a simplified model as...
Katharine Leney
(University College London (UK))
25/07/2015, 10:20
Masterclasses are an excellent platform to inspire, motivate and educate students about High Energy Physics (HEP). They typically entail lectures on a chosen topic followed by a hands-on session where students get to experience being a researcher for the day. A number of HEP masterclasses have been developed, including the International Particle Physics Masterclasses, supported by IPPOG. ...
Jaroslaw Pawel Wiechczynski
(Polish Academy of Sciences (PL))
25/07/2015, 10:20
The Belle II experiment at the SuperKEKB collider in Tsukuba, Japan, will start physics data taking in the year 2018 and aims at accumulating 50 ab$^{-1}$ of $e^+$ $e^-$ collision data, about 50 times the data set of the previous Belle experiment. The physics program provides simultaneous studies of a wide range of areas in $b$-quark, $c$-quark, $\tau$-lepton, two-photon, quarkonium and exotic...
Tobias Schlüter
(LMU München)
25/07/2015, 10:30
We discuss track fitting as implemented in the Belle II experiment currently under construction at KEK in Tsukuba, Japan. Track fitting sits at the interface of physics analysis and detector data, is essential to the tasks of detector calibration and alignment, and it also is an integral part of Belle II's high-level trigger. To address the variety of tasks, the track-fitting software,...
Andres Tiko
(Nat. Inst. of Chem.Phys. & Biophys. (EE))
25/07/2015, 10:31
Single top topologies are exploited for studies of top quark properties. This includes the first measurement of single top polarization in the t-channel production mode in pp collisions, which directly confirms the V-A nature of the tWb production vertex. W-helicity fractions are measured in the phase space sampled by a selection optimized for t-channel single top production, orthogonal to the...
Vittorio Paolone
(University of Pittsburgh)
25/07/2015, 10:31
The LBNF beamline complex is designed to provide a neutrino beam of sufficient intensity and energy to meet the goals of the DUNE experiment with respect to long-baseline neutrino oscillation physics. Presented in this talk will be the issues related to the baseline design from the physics, beam power (>1 MW), lifetime, and radiological requirements. Potential future upgrades to the beamline...
Kai-Feng Chen
(National Taiwan University (NTU))
25/07/2015, 10:35
The LHC is entering into operation with an increased centre-of-mass energy of 13 TeV, and within the next 3 years of operations (Run2) the foreseen integrated luminosity delivered to CMS will be about 100 fb-1. The B hadron production cross section is expected to nearly double at this energy compared to Run1, thus potentially increasing by almost one order of magnitude the collected statistics...
Kate Shaw
(INFN Gruppo Collegato di Udine and ICTP Trieste)
25/07/2015, 10:35
There is a huge untapped potential of physicists that come from countries without a strong tradition in the field. Strong young students may lack exposure to physics and physics research, they may not be aware of opportunities for further study, and governments and institutions may not fully recognise the importance of investing into the fundamental sciences. Outreaching particle physics to...
Viviana Cavaliere
(Univ. Illinois at Urbana-Champaign (US))
25/07/2015, 10:35
Resonant production of two massive bosons (WW, WZ, ZZ, W/Z+gamma, W/Z+H and HH) is a smoking gun signature for physics beyond the Standard Model. Searches for diboson resonances have been performed in final states with dierent numbers of leptons and jets including fat-jets with jet substructure. The searches at the highest accessible masses employ new identification techniques to disentangle...
Julia Hrdinka
(Vienna University of Technology (AT))
25/07/2015, 10:45
The outstanding success of the physics program of the LHC including the discovery of the Higgs boson shifted the focus of part of the high energy physics community onto the planning phase for future collider projects. Hadron based and electron-positron based collider technologies are considered as potential LHC successors. Common to both branches is the need for a coherent software framework...
Dr
Benoit Blossier
(CNRS)
25/07/2015, 10:50
Building an inclusive society is an active field nowadays. Of course
education is a key entry for people with disabilities to fulfill
their citizenship. We propose to present a couple of initiatives
recently taken in France in that direction, by letting the pupils with
disabilities discover and share science: in particular the operation
"La Main à la Päte" promoted by Académie des...
Stephane Monteil
(Univ. Blaise Pascal Clermont-Fe. II (FR))
25/07/2015, 10:50
A possible long-term strategy for high-energy physics at colliders considers a tunnel of about 100 km circumference, which takes advantage of the present CERN accelerator complex.A possible first step of the project is high-luminosity $e^+ e^−$ collider aimed at studying comprehensively the electroweak scale with centre-of-mass energies ranging from the $Z$ pole up to beyond the $t...
Juri Fiaschi
(University of Southampton)
25/07/2015, 10:50
The Forward-Backward Asymmetry (AFB) in Z' physics is commonly only perceived as the observable which possibly allows one to interpret a Z' signal by distinguishing different models of such (heavy) spin-1 bosons. In this paper, we examine the potential of AFB in setting bounds on or even discovering a Z' at the Large Hadron Collider (LHC) and show that it might be a powerful tool for this...
Prof.
David Kaplan
(Johns Hopkins University)
25/07/2015, 11:30
I present a new class of solutions to the electroweak hierarchy problem that does not require either weak scale dynamics or anthropics. In these solutions, dynamical evolution during the early universe drives the Higgs mass to a value much smaller than the cutoff. The simplest model has the particle content of the standard model plus a QCD axion and an inflation sector. In a model with...
Hans Stroeher
(Forschungszentrum Juelich GmbH)
25/07/2015, 11:30
Permanent Electric Dipole Moments (EDM) of non-degenerate systems, e.g., leptons
(electron, muon, tau) and hadrons (neutron, proton), provide a unique opportunity to search for physics beyond the Standard Model (BSM). Since EDMs violate P-, T-, and (via CPT)
CP-symmetry they may also provide a solution to one of the biggest puzzles of contemporary physics and cosmology, i.e., the apparent...
Farid Ould-Saada
(Oslo University, Norway)
25/07/2015, 11:30
LHC data are successfully deployed in International Masterclasses where young students explore the Higgs discovery and other measurements. Promises of new discoveries in the 13 TeV era and opportunites offered by CERN open data have triggered new educational materials. After a few success stories, we describe new features and future plans. We identify four levels of high school engagement. The...
Mogens Dam
(University of Copenhagen (DK))
25/07/2015, 11:30
The prospects for electroweak precision measurements at the Future Circular Collider with electron-positron beams (FCC-ee) should provide improvements by a factor of order 25 over the present status, and constitute a broad search for the existence of new, weakly interacting particles up to very high energy scales. The Z mass and width, as well as the value of the electroweak mixing angle and b...
Daniel Schoerling
(CERN)
25/07/2015, 11:30
Following the recommendation of the European Strategy Group for Particle Physics, a study on options for a Future Circular Collider (FCC) with centre-of-mass energy of 100 TeV, a luminosity of 5–10 × 1034 cm2s−1 and a circumference in the range of 100 km was started. The study integrates ongoing accelerator and technology initiatives at CERN and in partner...
Karel Van Acoleyen
(Ghent University)
25/07/2015, 11:30
Non-Perturbative Field Theory and String Theory
talk
In the last decade the tensor network state (TNS) formalism has emerged as a
new language for our understanding of quantum many body systems. As a
Hamiltonian variational method, the TNS framework can handle dynamical
non-equilibrium phenomena and regimes with finite fermionic densities, and it
therefore presents a promising complementary approach to the Monte-Carlo
Euclidean lattice...
Eigo Shintani
(Mainz University)
25/07/2015, 11:45
Non-Perturbative Field Theory and String Theory
talk
I will present the recent result of nucleon form factor using error reduction technique, so called as all-mode-averaging. This algorithm is able to reduce the computational cost of correlation function in Monte-Carlo calculation by adopting the covariant approximation into quark propagator. In this talk, I will discuss this technique on nucleon form factor calculation and show the high...
Dr
Gertrud Konrad
(SMI Wien)
25/07/2015, 11:50
The newly established New Frontiers Group ‘NoMoS: Beyond the Standard Model Physics in Neutron Decay’ of the Austrian Academy of Sciences aims to search for traces of new physics in neutron beta decay with novel experimental techniques.
Precision measurements in neutron decay allow searching for physics beyond the Standard Model. An accuracy of $10^{-4}$ in the observables corresponds to...
Zhiqing Philippe Zhang
(LAL, Orsay (FR))
25/07/2015, 11:50
The LHeC is a proposed upgrade of the LHC to study ep/eA collisions in the TeV regime, by adding a 60 GeV electron beam through an Energy Recovery Linac. In ep, high precision electroweak and top physics can be performed, such as measurements of anomalous top couplings, for which simulation studies are presented, besides the prospect to access the top PDF.
Alessia Tricomi
(Universita e INFN, Catania (IT))
25/07/2015, 11:55
Prospects for the high luminosity LHC will be given in the fields of Higgs physics and SUSY
searches. The prospects will be presented for ATLAS and CMS.
Michele Pepe
(INFN)
25/07/2015, 12:00
Non-Perturbative Field Theory and String Theory
talk
We construct an energy-momentum tensor on the lattice which satisfies the
appropriate Ward Identities and has the right trace anomaly in the continuum
limit. These relations come forth when the length of the box in the temporal
direction is finite, and they take a particularly simple form if the coordinate
and the periodicity axes are not aligned. We implement the method for the...
Camila Jose Rangel Smith
(Uppsala University (SE))
25/07/2015, 12:00
A virtual research and learning community can be a powerful tool for educational purposes. It has a wide range of possibilities for multi-institution participation; such as synchronous and asynchronous online engagement, decentralized student discussions and academic networking, as well as being cost effective. In this context, the CEVALE2VE virtual community (Centro de Altos Estudios de Altas...
Martin Simon
(Austrian Academy of Sciences (AT))
25/07/2015, 12:05
The formation of antihydrogen opens a new avenue toward precise matter-antimatter symmetry studies through atomic spectroscopy techniques. The ASACUSA collaboration is pursuing an experiment to measure the ground-state hyperfine splitting of antihydrogen in a polarized beam [1]. For hydrogen this transition has been measured in a beam and with a maser reaching a relative precision of 4 × 10e−8...
Ivan Melo
(University of Zilina (SK))
25/07/2015, 12:10
International Particle Physics Masterclasses are successful in motivating high school students. However, it is a one day event and some of the students are ready to go deeper into the realm of particle physics. In the Cascade competition (developed at University of Birmingham) teams of 3 - 6 high school students work for several weeks on projects on projects of their choice with the help of...
Prof.
Gudrid Moortgat-Pick
(University of Hamburg / DESY)
25/07/2015, 12:10
High luminosity is required at future Linear Colliders
which is particularly challenging for all corresponding positron sources.
At the ILC, polarized positrons are obtained from electron-positron pairs by converting
high-energy photons produced by passing the high-energy main electron beam through a
helical undulator.
The conversion target undergoes cyclic stress with high peak values....
Roman Poeschl
(Laboratoire de l'Accelerateur Lineaire (FR))
25/07/2015, 12:10
The International Linear Collider and Compact Linear Collider projects aim to build a linear electron-positron collider with a center-of-mass energy well above the top quark pair production threshold. In this contribution an overview is presented of the potential of their top quark precision physics programme. One of the highlights is a precise determination of the top quark mass through a...
Mr
Alessandro Nada
(University of Torino & INFN, Turin)
25/07/2015, 12:15
Non-Perturbative Field Theory and String Theory
talk
We present high-precision lattice calculations of the thermodynamics of
Yang-Mills theories with different gauge groups. In the confining phase,
we show that the equation of state is described remarkably well by a gas
of massive, non-interacting glueballs, provided that an effective
bosonic closed-string model is used to derive an exponentially growing
Hagedorn spectrum for the heavy...
Christine Kourkoumelis
(National and Kapodistrian University of Athens (GR))
25/07/2015, 12:20
The Inspiring Science Education and Go-lab outreach projects (approved by the European Commission) have been running for about two years. Their goal is the promotion of science education in schools though new methods built on the inquiry based education techniques and involving large consortia of European partners who test them with large scale pilots in thousands of European schools.
Both...
Bastian Maerkisch
(Universität Heidelberg)
25/07/2015, 12:20
Neutron beta decay is an excellent system to study the charged weak interaction experimentally. The decay is precisely described by theory and unencumbered by nuclear structure effects. Observables are numerous correlation coefficients, spectra and the neutron lifetime. Precision measurements in neutron beta decay are used to investigate the structure of the weak interaction and to derive...
Claire Adam Bourdarios
(Laboratoire de l'Accelerateur Lineaire (FR))
25/07/2015, 12:30
To support the outreach activities of Atlas institutes and to grab people's attention in science exhibitions and during public events, we have created both a very detailed model of the experiment built entirely out of Lego bricks as well as an outreach programme using Lego bricks to get people to think about particle detectors and involve them in a conversation about particle physics in...
Dr
Pietro Giudice
(University of Münster)
25/07/2015, 12:30
Non-Perturbative Field Theory and String Theory
talk
The spectrum of the lightest bound states in N=1 supersymmetric Yang-Mills theory, calculated on the lattice, is presented. The masses have first been extrapolated towards vanishing gluino mass and then to the continuum limit. The final picture is consistent with the formation of degenerate supermultiplets.
David Anthony Milstead
(Stockholm University (SE))
25/07/2015, 12:35
Flavour Physics and Fundamental Symmetries
A sensitive search for neutron-antineutron oscillations can provide a unique probe of some of the central questions in particle physics and cosmology: the energy scale and mechanism for baryon number violation, the origin of the baryon-antibaryon asymmetry of the universe, and the mechanism for neutrino mass generation. A remarkable opportunity has emerged to search for such oscillations with...
Michael Kobel
(Technische Universitaet Dresden (DE))
25/07/2015, 12:40
IPPOG (the International Particle Physics Outreach Group) is a network of particle physicists and communicators with contacts all across Europe and beyond. In the last 10 years members of IPPOG have developed a wealth of tools which enable the public and especially young high school students from an age of 16 years onwards to perform own data analysis on real scientific data from the LHC. In...
Markus Klute
(Massachusetts Inst. of Technology (US))
25/07/2015, 12:45
After the Higgs boson discovery, the precision measurements and searches for new phenomena in the Higgs sector are among the most important goals in particle physics. Experiments at the Future circular colliders (FCC) under study are ideal to study these questions. Electron-position collisions up to an energy of 350 GeV (FCC-ee) provide the ultimate precision in Higgs physics with studies of...
Mateusz Koren
(IFT UAM-CSIC Madrid)
25/07/2015, 12:45
Non-Perturbative Field Theory and String Theory
talk
We analyze 2+1 dimensional Yang-Mills theory on a spatial torus with twisted boundary conditions.
It is conjectured that the physical quantities in the theory obey the so-called x-scaling, i.e.
depend only on the variable x~NL/b and the magnetic flux, given by the parameters of the twist (L
being the length of the spatial torus and b the inverse 't Hooft coupling). Using lattice...
Angelos Alexopoulos
(CERN)
25/07/2015, 12:50
Although significant investments have been made over the last two decades to introduce innovative approaches to science education, recent studies demonstrate that approaches based solely on inquiry and problem solving methods have a relatively low degree of adoption in school settings. In response to this, recent years have seen the emergence of a movement that seeks to encourage the public...
Gerald Eigen
(University of Bergen)
25/07/2015, 12:50
We present a measurement of the time-dependent CP asymmetry in the radiative-penguin decay B0 -> K_S pi+ pi- gamma, using a sample of 471 million BBbar events recorded with the BaBar detector at the PEP-II e+e- collider at SLAC.
We obtain the CP-violating parameters S and C in the decay, and, using new theoretical input, extract from them the time-dependent mixing-induced CP asymmetry,...
Raphael Flauger
(Carnegie Mellon Univ.)
25/07/2015, 14:30
Fedor Bezrukov
(UConn & CERN & BNL)
25/07/2015, 15:00
Reynald Pain
(IN2P3)
25/07/2015, 15:30
Christian Weinheimer
(Univ. Münster)
25/07/2015, 17:00
Prof.
Patric Muggli
(Max Planck Institute for Physics)
25/07/2015, 17:30
Robin Golser
(University of Vienna)
27/07/2015, 09:00
Anton Zeilinger
(Austrian Academy of Sciences)
27/07/2015, 09:10
Adalbert Prechtl
27/07/2015, 09:20
Dr
Kerstin Borras
(DESY / RWTH Aachen University)
27/07/2015, 11:30
Pierre Savard
(University of Toronto (CA))
27/07/2015, 12:30
Andrea Wulzer
(Universita e INFN (IT))
27/07/2015, 14:30
Maxime Gouzevitch
(Universite Claude Bernard-Lyon I (FR))
27/07/2015, 15:00
Massimiliano Grazzini
(Universitaet Zuerich (CH))
27/07/2015, 15:30
Freddy Cachazo
(Perimeter Institute)
27/07/2015, 17:00
Werner Hofmann
(MPI-K Heidelberg)
28/07/2015, 09:30
Francis Halzen
(High Energy Physics-Department of Physics-University of Wiscons)
28/07/2015, 10:00
Ofer Lahav
(University College London)
28/07/2015, 11:30
Didier Claude Contardo
(Universite Claude Bernard-Lyon I (FR))
28/07/2015, 14:00
Dr
Weiren Chou
(Fermilab)
28/07/2015, 14:30
Andrei Seryi
(University of Oxford (GB))
28/07/2015, 15:00
Jana Bielcikova
(Acad. of Sciences of the Czech Rep. (CZ))
28/07/2015, 16:30
Raphael Granier De Cassagnac
(Centre National de la Recherche Scientifique (FR))
28/07/2015, 17:00
Prof.
Pilar Hernandez
(Instituto de Fisica Corpuscular (ES))
29/07/2015, 09:00
Barbara Caccianiga
(INFN)
29/07/2015, 09:30
Juan Jose Gomez Cadenas
(Universidad de Valencia (ES))
29/07/2015, 10:00
Gudrun Hiller
(Technische Universitaet Dortmund (DE))
29/07/2015, 10:30
Patrick Koppenburg
(NIKHEF (NL))
29/07/2015, 11:35
Karim Trabelsi
(Ecole Polytechnique Federale de Lausanne (CH))
29/07/2015, 12:05
Ivan Mikulec
(Austrian Academy of Sciences (AT))
29/07/2015, 14:30
Gerald Gabrielse
(Harvard University (US))
29/07/2015, 15:30
Dr
Fabiola Gianotti
(CERN)
29/07/2015, 17:00
Jana Fodorova
(Czech Technical University in Prague)
Heavy Ion Physics
poster
Quark-gluon plasma (QGP), a novel state of deconfined nuclear matter, has been extensively studied in high-energy heavy-ion collisions
at the Relativistic Heavy Ion Collider (RHIC). Suppression of heavy quarkonium production (e.g. $J/\psi$, $\Upsilon$) in heavy-ion
collisions compared to proton-proton collisions due to the color screeening of the quark-antiquark potential is expected
to...
Prof.
Johannes Bluemlein
(DESY)
QCD and Hadronic Physics
talk
A survey is presented on the calculation of the 3-loop QCD corrections to the heavy flavor Wilson coefficients in deep-inelastic scattering in the region of large momentum transfer $Q^2 \gg m^2$ and on the 3-loop matching coefficients in the variable flavor number scheme. Results are presented for the flavor non-singlet and pure singlet cases and for contributions due to Feynman diagrams...
Mr
Jingkai Xia
(Institute of High Energy Physics, Chinese Academy of Sciences)
Detector R&D and Data Handling
poster
Photomultiplier tubes are intensively used in high energy physics experiments such as the time-of-flight detector and neutrino observatory. A comprehensive performance evaluation system for Photomultiplier tubes has been built up. The system is able to review diverse cathode and anode properties for PMTs with different sizes and dimensions. Relative and direct methods were developed for the...
Mr
Ole Trinhammer
(Technical University of Denmark, Dept. of Physics)
Higgs and New Physics
poster
Baryons are described by a Hamiltonian on an intrinsic U(3) Lie group configuration space with electroweak degrees of freedom originating in specific Bloch wave factors. By opening the Bloch degrees of freedom pairwise via a U(2) Higgs mechanism, the strong and electroweak energy scales become related to yield the Higgs mass and the usual gauge boson masses. From the same Hamiltonian we derive...
Darius Jurciukonis
(Vilnius University (LT))
Neutrino Physics
poster
Assuming a minimal seesaw model with two right-handed singlet Majorana
neutrinos we analyse light neutrino masses and oscillation angles
induced by the $\mu$-$\tau$ symmetry. A general neutrino mass matrix,
that is invariant with respect to the $\mu$-$\tau$ symmetry, gives $\theta_{23}=45$ degree and $\theta_{13}=0$. Applying radiative
corrections we break this flavor symmetry and...
Nicolas Arnaud
(LAL (CNRS-IN2P3))
Education and Outreach
poster
This poster provides an overview of the current understanding of matter at the smallest scales and it is meant to be used as a pedagogical resource at high-school level. Teachers and pupils will find information about the Standard Model, the elementary fermions (classified by family and by flavor), the fundamental interactions and the Higgs boson. This poster was created in France by a team of...
Jaroslaw Balitsky
(Moscow Institute of Physics an Technology(State University))
Astroparticle Physics, Cosmology, Gravitation
poster
In our previous work [1] it was shown that the effective potential of the inflaton is generated by gravitational loops.
Such mechanism is applicable to the inflation of early Universe. Three possible scenarios of the inflation dynamics are described and fitted to the latest Planck data.
[1] “Inflaton as a pseudo-Goldstone boson of vacuum energy shift symmetry”, JCAP, 1475 no. 04, 032...
Shao-Hsuan Chiu
(Chang Gung University, Taiwan)
Neutrino Physics
poster
Three-flavor neutrino mixing is studied through the sets of evolution equations which are based on a rephasing invariant parametrization. These equations are found to preserve some characteristic features of the mixing matrix. Applications to the neutrinos in matter and the RGE running of the neutrino parameters are investigated.
Dmitri Melikhov
(HEPHY & SINP, Moscow State University)
Flavour Physics and Fundamental Symmetries
poster
We present our analysis of the decay constants of the beauty vector mesons within QCD sum rules for the two-point correlators of vector currents. While the decay constants of the vector mesons, similar to the decay constants of the pseudoscalar mesons, individually have large uncertainties induced by theory parameters not known with a satisfactory precision, these uncertainties almost entirely...
Elsa Fabiola Vazquez Valencia
(Universidad Iberoamericana (MX))
Education and Outreach
poster
CMS welcomed over 5500 visitors underground during the 2013 CERN Open Days and more than 4500 during the Neighbourhood Days of 2014 on the occasion of CERN’s 60th anniversary. During the latter event, visitors gave their feedback on the visit experience by answering three questions: • In one sentence, what will you tell your friends about what you saw today? • What fact or story that you heard...
Dr
Catarina Simoes
(IFPA, University of Liège)
Flavour Physics and Fundamental Symmetries
poster
In this work we search for minimal sets of chiral fermions, with arbitrary quantum numbers, beyond the Standard Model that are anomaly-free and lead to vector-like particles under SU(3) and electromagnetic U(1) after symmetry breaking. We further study which of these anomaly-free sets lead to unification of the gauge couplings at energy scales higher that 5.0×10^15 GeV in order to be...
Dr
Sofia Andringa
(LIP)
Neutrino Physics
poster
SNO+ is a new neutrino physics experiment, that will start collecting data in 2016, reusing the SNO detector with 780 tons of liquid scintillator as an active medium. It will perform several low energy measurements, namely the search for neutrinoless double beta decay, for which the scintillator will be loaded with tellurium. Anti-neutrino interactions can be identified through a...
Martin Rohrmoser
(SUBATECH)
Heavy Ion Physics
poster
It is the central goal of our studies to describe parton fragmentation in the hot and dense medium of a quark gluon plasma. Under the assumption that the medium is not static and homogeneous, knowledge about the temporal evolution of the processes involved can be of essential importance.
Therefore, parton fragmentation has been studied with a Monte-Carlo algorithm that approximates the...
Angelos Alexopoulos
(CERN)
Education and Outreach
poster
art@CMS is an education and outreach programme of the CMS Experiment at CERN. Since 2012, art@CMS has been a springboard for engagement with scientific research in physics and particle physics in an exciting and inspiring way, through the development of creative and participatory experiences for the public, especially aimed at young people. art@CMS achieves this through two complementary...
Paul Glaysher
(University of Edinburgh (GB))
Higgs and New Physics
poster
Run-I at the LHC has been very successful and included the discovery of a new particle with mass of about 125 GeV compatible within uncertainties with the Higgs boson predicted by Standard Model. In this talk, the Higgs physics prospects at the high-luminosity LHC are presented, assuming an energy sqrt(s) = 14 TeV and a dataset of 300 and 3000/fb. In particular, the ultimate precision...
Oleksandr Viazlo
(Lund University (SE))
Detector R&D and Data Handling
poster
The new ATLAS luminosity monitor got several major innovations. Its photomultipliers tubes are used as detector elements by using the Cherenkov light produced by charged particles above threshold crossing the quartz windows. In order to cope with the 25 ns bunch spacing of the LHC machine the analog shaping of the readout chain has been significantly improved. The main readout card represents...
Christian Weiss
(DESY)
QCD and Hadronic Physics
poster
WHIZARD is a multi-purpose event generator for hadron- and lepton-colliders, featuring support for various models. A distinct feature is the description of beamstrahlung and ISR for lepton collisions. Up to now, the program has been able to automatically perform leading-order calculations, contributions of higher virtual orders being only available for some specific kinds of processes. Since...
Alex Birnkraut
(Technische Universitaet Dortmund (DE))
Flavour Physics and Fundamental Symmetries
poster
An essential ingredient of all time-dependent CP violation studies of B mesons is the ability to tag the initial flavour of the B meson. The harsh environment of 7 and 8 TeV pp collisions makes this a particularly difficult enterprise. We report progresses in the flavour tagging of B0 and Bs mesons, including developments of novel techniques like the use of an opposite side charm tagger.
Thomas Calvet
(CPPM, Aix-Marseille Université, CNRS/IN2P3 (FR))
Detector R&D and Data Handling
poster
The insertion of the IBL (Insertable B-Layer) allows the ATLAS Experiment to significantly improve the b-tagging performance during the LHC Run-II. As well as the IBL, a significant effort has gone into improving the b-tagging algorithms. The expected performance improvement from both these updates, as well as the first results from commissioning the b-tagging with the new data, will be...
Yevgeny Kats
(Weizmann Institute)
QCD and Hadronic Physics
poster
Measurements of polarizations of quarks produced in new physics processes could provide crucial information about the structure of the new physics. The $b$ and $c$-quark polarizations are largely preserved in the lightest baryons they hadronize into, $\Lambda_b$ and $\Lambda_c$, respectively. We show how ATLAS and CMS can measure the $b$-quark polarization using semileptonic $\Lambda_b$...
Ivan Melo
(University of Zilina (SK))
Heavy Ion Physics
poster
We fit the single-hadron transverse-momentum spectra measured in Pb+Pb collisions at $\sqrt{s_{NN}}$ = 2.76 TeV with the blast-wave model that includes production via resonance decays. Common fit to pions, kaons, (anti)protons, and lambdas yields centrality dependence of the freeze-out temperature and transverse expansion velocity. Multistrange baryons seem to decouple at higher temperature...
Vicent Mateu Barreda
(University of Vienna)
QCD and Hadronic Physics
poster
We present determinations of the MS-bar charm quark mass using relativistic QCD sum rules at O(as^3) from the moments of the vector and the pseudoscalar current correlators. Our analysis of the theoretical uncertainties is based on different implementations of the perturbative series and on independent variations of the renormalization scales for the mass and the strong coupling. We address...
Erica Brondolin
(Austrian Academy of Sciences (AT))
Detector R&D and Data Handling
poster
The Compact Muon Solenoid (CMS) is one of the two general purpose experiments at the LHC. Until 2012 (Run1), pp collisions have been delivered with a minimal bunch time separation of 50 ns and a mean of about 15 collisions per bunch crossing. After the end of the long shut-down this year, LHC is foreseen to ultimately exceed an instantaneous luminosity of 10^{34} cm^{−2}s^{−1}, which means a...
Collaboration H1 and ZEUS
(DESY)
QCD and Hadronic Physics
talk
H1 and ZEUS have published single-differential cross sections for
inclusive $D^{\star}$ meson production in deep-inelastic ep scattering at HERA
from their respective final data sets. These cross sections are
combined in the common visible phase space region of photon virtuality
$Q^2> $5 GeV², electron inelasticity $0.02 < y< 0.7$ and the $D^{\star}$ meson's transverse momentum...
Collaborations H1 and ZEUS
(DESY)
QCD and Hadronic Physics
talk
A combination is presented of all inclusive deep inelastic cross
sections measured by the H1 and ZEUS collaborations in neutral and
charged current unpolarised ep scattering at HERA. The data correspond
to a luminosity of about 1 fb$^{-1}$ and span six orders of magnitude in
negative four-momentum-transfer squared, Q², and Bjorken x. They
include data taken at proton beam energies of 920,...
Dr
Chian-Shu Chen
(National Center for Theoretical Sciences, Taiwan)
Astroparticle Physics, Cosmology, Gravitation
poster
The halo dark matter (DM) can be gravitationally captured by the Sun. For self-interacting DM (SIDM), we show that the number of DM trapped inside the Sun remains unsuppressed even if the DM-nucleon cross section is negligible. We consider a SIDM model where $U(1)$ gauge symmetry is introduced to account for the DM self-interaction. Such a model naturally leads to isospin violation for...
Prof.
Stanislav Dubnicka
(Inst.of Physics SAS, Bratislava, Slovakia)
Flavour Physics and Fundamental Symmetries
poster
The pion scalar form factor phase representation derived from the first principles together with unprecise experimental information on the S-wave isoscalar $\pi\pi$ scattering phase shift in elastic region is sufficient for a confirmation of $f_0(500)$ meson existence in a model independent way. However, for determination of correct mass and width of $f_0(500)$ in the framework of such fully...
223.
Connecting amplitudes in different gauges beyond perturbation theory: a canonical flow approach
Andrea Quadri
(INFN, Sez. di Milano)
QCD and Hadronic Physics
poster
It sometimes happens that particular gauges are computationally more suited than others in the study of several properties of gauge theories.
QCD provides a number of examples of such a feature: for instance,
evolution equations in the Color Glass Condensate picture are usually derived in the Light-Cone gauge. A more striking example is given by massive solutions
of appropriate truncations...
Tai-Hua Lin
(Johannes-Gutenberg-Universitaet Mainz (DE))
Detector R&D and Data Handling
poster
In view of the use of micromegas detectors for the upgrade of the ATLAS muon system, we have constructed two detector quadruplets with an area of 0.5 m2 per plane serving as prototypes for future ATLAS chambers. They are based on the resistive-strip technology and thus spark tolerant. The detectors were built in a modular way. The quadruplets consist of two double-sided readout panels and...
Jona Bortfeldt
(Ludwig-Maximilians-Univ. Muenchen (DE))
Detector R&D and Data Handling
poster
Floating strip Micromegas detectors have proven to be discharge
sustaining and versatile high-rate capable tracking detectors. They
exhibit a spatial resolution of 50 $\mu$m and a single strip temporal
resolution on the order of 5 ns. Up to particle fluxes of 7 MHz/cm$^2$
single particle tracking at an efficiency above $95\%$ is possible.
Recently we have further increased the high-rate...
Dr
Fanrong Xu
(Institute of Physics, Academia Sinica, Taiwan)
Flavour Physics and Fundamental Symmetries
poster
The Bs → μ+μ− mode has finally been observed, albeit at rate 1.2σ below Standard Model (SM) value, while the rarer Bd0 → μ+μ− decay has central value close to 4 times SM expectation but with only 2.2σ significance. The measurement of CP violating phase φs has finally reached SM sensitivity. Concurrent with improved measurements at LHC Run 2, KL → π0νν and K+ → π+νν decays are being pursued in...
Fabio Anulli
(Universita e INFN, Roma I (IT))
QCD and Hadronic Physics
poster
We present full Dalitz plot analyses for the decays of B mesons to
D^- D^0 K^+ and Dbar^0 D^0 K^+. We report the observation of the
Ds1*(2700) resonance in these two channels and obtain measurements of the mass M(Ds1*(2700)) = 2699 +14-7 MeV/c2 and of the width Gamma(Ds1*(2700)) = 127 +24-19 MeV, including statistical and systematic uncertainties. In addition, we observe an enhancement in...
Roberta Diamanti
(U)
Astroparticle Physics, Cosmology, Gravitation
poster
In this work we study how the kinetic decoupling of Dark Matter (DM) could improve our knowledge of the properties of the DM protohalos within a Minimal Supersymmetric extension of the Standard Model, by adopting nine independent parameters (MSSM-9). We study how the size of the smallest DM protohalos correlates to experimental signatures, such as the spin-dependent and spin-independent...
Hans Van Haevermaet
(University of Antwerp (BE))
Akshay Katre
(Universite de Geneve (CH))
Detector R&D and Data Handling
poster
In 2012, a novel strategy was designed to detect signatures of Highly Ionising
Particles (HIPs) such as magnetic monopoles, dyons or Qballs with the ATLAS
trigger system. With proton-proton collisions at a centre of mass enegy of 8
TeV, the trigger was designed to have unique properties as a tracker for HIPs.
It uses only the Transition Radiation Tracker (TRT) system, applying...
Frank Simon
(Max-Planck-Institut fuer Physik)
Detector R&D and Data Handling
talk
The highly granular calorimeter prototypes of the CALICE collaboration have provided large data samples with precise three-dimensional information on hadronic showers with steel and tungsten absorbers and silicon, scintillator and gas detector readout. From these data sets, detailed measurements of the spatial structure, including longitudinal and lateral shower profiles and of the shower...
Collaboration H1 and ZEUS
(DESY)
QCD and Hadronic Physics
talk
The combined HERA data on charm production in deep inelastic scattering have recently
been used to determine the charm quark running mass $m_c(m_c)$ in the $\overline{MS}$ renormalisation
scheme. The same data are used differentially as a function of the photon virtuality
Q² to evaluate the charm quark running mass at different scales to one-loop order. The scale
dependence of the mass is...
Katerina Lipka
(Deutsches Elektronen-Synchrotron (DE)),
Ringaile Placakyte
(Deutsches Elektronen-Synchrotron (DE))
QCD and Hadronic Physics
talk
Improved determination of the strange sea distribution in the nucleon is presented. Recent charm production data in neutrino-nucleon deep-inelastic scattering by the NOMAD and CHORUS experiments and from charged current inclusive deep-inelastic scattering at HERA are used. The results are consistent with the data from the ATLAS and the CMS experiments on the associated production of...
Judith Katzy
(DESY, HAMBURG)
Higgs and New Physics
poster
Measurements of the ZZ and WW final states in the mass range above the 2mZ and 2mW thresholds
provide a unique opportunity to measure the off-shell coupling strength of the Higgs boson.
This poster presents a determination of the off-shell Higgs boson event yields normalised to the
Standard Model prediction (signal strength) in the ZZ→4ℓ, ZZ→2ℓ2ν and WW→eνμν final states. The
result is...
Kevin Phelan
(Stefan Meyer Institute for Subatomic Physics)
QCD and Hadronic Physics
poster
The ASPE!CT project (a collaboration of industrial and research companies, and the Stefan-Meyer Institute in Vienna) aims to develop a commercially viable, cryogenic detector platform. The first phase of the project will produce a cryogen-free, single-stage, adiabatic demagnetisation refrigerator for use at ~500mK. The project aims to advance the technology into the realm of reliable, compact,...
Erik Bartos
(Institute of Physics of the Slovak Academy of Sciences)
QCD and Hadronic Physics
poster
The $\rho(770)$, $\rho(1450)$, $\rho(1700)$ mesons exist in three charged states $\rho^{0}$, $\rho^{+}$ and $\rho^{-}$, whereby masses of positively charged mesons are identical with masses of negatively charged mesons, due to the CPT theorem. However, there is no reason for the identity of charged meson masses with neutral meson masses. For determination of differences of masses and decay...
Arnd Meyer
(Rheinisch-Westfaelische Tech. Hoch. (DE))
QCD and Hadronic Physics
talk
Several measurements of QCD jets are presented as performed at different center-of-mass energies with the CMS experiment. By extending the measurement into the forward phase space and also towards low-pT the sensitivity to new features of QCD is maximised. The simultaneous observation of several jets in the same event is exploited to study for example the angular correlations of Mueller...
Sergey Sukhoruchkin
(PNPI)
Flavour Physics and Fundamental Symmetries
poster
The tuning effect in particle masses consists of empirical rational relations between them.
Using estimation by CODATA of the ratio between the masses
of the neutron and electron 1838.6836605(11) the shift of neutron mass
161.65(6) keV forms the ratio 8x1.001(1) with the nucleon mass difference. It is a confirmation of the tuning effect [1,2].
Scalar boson mass $M_H$=126.5 GeV,...
Kirill Grevtsov
(Centre National de la Recherche Scientifique (FR))
Detector R&D and Data Handling
poster
An excellent electron and photon performance is crucial for precision
results from high energy proton-proton collisions with electrons and
photons in the final state.
Identification, energy calibration, response uniformity and linearity for
electrons and photons with the ATLAS detector during the LHC run I will be
presented.
Events with W and Z bosons and J/psi mesons are employed to...
Arnd Meyer
(Rheinisch-Westfaelische Tech. Hoch. (DE))
Detector R&D and Data Handling
poster
For the LHC High Luminosity phase (HL-LHC) the CMS Collaboration is planning to upgrade the detector to cope with the extreme particle rates and to reduce the impact on the physics performance due to the large number of pileup events. The most important upgrades will involve new and thinner Silicon Tracker, with extended rapidity coverage, and a new Silicon High Granularity Calorimenter in the...
Dr
Romain Maisonobe
(Institut Laue-Langevin)
Flavour Physics and Fundamental Symmetries
poster
Free neutron decays into a proton, an electron and an antineutrino. This is a weak interaction process described by the V-A theory within the Standard Model. The beta decay of the neutron is parametrized by several measurable correlation coefficients which are related to parameters of the Standard Model and are used to search for new physics.
The spectrometer aSPECT was designed to measure...
Frank Simon
(Max-Planck-Institut fuer Physik)
Higgs and New Physics
poster
While the current 7/8 TeV results form the LHC excludes highly constrained SUSY models with a light sparticle spectrum, less constrained models
are still viable. Certain such models promise both discovery of coloured sparticles during the upcoming 14 TeV run of the LHC, and a rich spectrum of non-coloured states, accessible at the ILC. LHC might or might not give a hint to the existence of...
Peter Filip
(Slovak Academy of Sciences (SK))
Flavour Physics and Fundamental Symmetries
poster
We suggest, that specific decay channels of mesons can be
influenced by external electromagnetic field of sufficient
strength. In particular, CP - violating decay of Eta meson
Eta--> Pi+Pi-, which is limited to BR < 10^-27 in Standard
Model, can become enhanced in the magnetic field. Phenomenon
occurs due to quantum superposition of J=0 Eta meson state
with (Sz=0) substate of (J=1)...
Dr
Abolfazl Mirjalili
(Yazd university)
QCD and Hadronic Physics
poster
The transverse momentum dependent (TMD) of parton distributions will provide us new insights into the substructure of nucleon beyond the one-dimensional (longitudinal) picture. Evidence for TMDs are accessible in processes such as semi-inclusive DIS (SIDIS) or dileptons produced in the Drell-Yan process. Here we are investigating the evolution the the unpolarized TMDs up to NNLO...
Youngjoon Kwon
(Yonsei University)
QCD and Hadronic Physics
poster
Utilizing the data sample containing $158\times 10^6$ and $102\times 10^6$ events of $\Upsilon(2S)$ and $\Upsilon(1S)$ decays, respectively, the Belle collaboration has performed studies of $\chi_{bJ}(1P)$ exclusive decays to light hadrons, and $\Upsilon(1,2S)$ decays to exclusive states including a $\Lambda\bar{\Lambda}$ pair and a number of mesons. We present the results of these studies...
Dr
Valery Lyuboshitz
(Joint Institute for Nuclear Research, Dubna)
Heavy Ion Physics
poster
The process of emission of two identical particles with
nonzero spin $S$ and different helicities in relativistic
heavy-ion collisions is theoretically
investigated within the model of one-particle multipole
sources. Taking into account the unitarity of the finite
rotation matrix and the symmetry relations for $d$--functions,
the general expression for the probability of emission...
Prof.
Andre Nepomuceno
(Universidade Federal Fluminense)
Higgs and New Physics
poster
In this work one investigates the LHC potential for discovering doubly-charged vector bileptons considering the measurable process $pp \longrightarrow \mu^{+} \mu^{+} \mu^{-} \mu^{-}X$. We perform the study assuming different bilepton masses and different exotics quark masses. The process cross-section is calculated at leading-order using the CALCHEP package. Combining this calculation with...
Prof.
Chung Kao
(University of Oklahoma)
Higgs and New Physics
poster
We investigate prospects for discovery of a heavy Higgs boson
$\phi^0$ ($m_\phi > m_t$) that decays into a top and a charm
quark at the CERN Large Hadron Collider (LHC),
where $\phi^0$ could be a CP-even scalar ($H^0$) or
a CP-odd pseudoscalar ($A^0$).
A general two Higgs doublet model (2HDM) is adopted to study the signature
of flavor changing neutral Higgs (FCNH) decay $\phi^0 \to...
Nicola Pozzobon
(Universita e INFN, Padova (IT))
Detector R&D and Data Handling
poster
To extend the LHC physics program, it is foreseen to operate the LHC in the future with an unprecedented high luminosity. To maintain the experiment's physics potential in such harsh environment, the detector will need to be upgraded. At the same time the detector acceptance will be extended and new features such as a L1 track trigger will be implemented. Simulation studies evaluated the...
Prof.
Andrew Koshelkin
(National Research Nuclear University)
QCD and Hadronic Physics
poster
The fermion and total currents generated by a gauge field are derived in the framework of the $SU(N)$ gauge theories. Under the condition of gauge invariance, the obtained currents is found to be expressible in terms of the massive vector field generated by the initial gauge field.
In this way, the derived contribution to the mass of the vector field depends strongly on the occupancy...
Prof.
Anton Rebhan
(Vienna University of Technology)
QCD and Hadronic Physics
poster
We report recent results on the spectrum and the decay patterns of scalar and tensor glueballs in the top-down holographic Witten-Sakai-Sugimoto model. This model, which has only one free dimensionless parameter, gives semi-quantitative predictions for the vector meson spectrum, their decay widths, and also a gluon condensate in agreement with SVZ sum rules. The predictions for glueball decay...
Dr
Seyed Mohammad Moosavi Nejad
(Yazd University)
QCD and Hadronic Physics
poster
Fragmentation is the dominant production mechanism for heavy-quark-antiquark bound
states with large transverse momentum. We analytically calculate the initial scale
fragmentation functions (FFs) for a gluon and a heavy quark to split into $S$-wave heavy quarkonium states using the perturbative QCD.
Our analytical expression of FFs depends on the transverse momentum $k_T$ of the partons,...
Prof.
Paul Hoyer
(University of Helsinki)
QCD and Hadronic Physics
poster
I discuss an analytic, first principles approach to QCD bound states based on an expansion in $\alpha_s$. As for QED atoms, the main features (including confinement) appear already at Born level (lowest order in $\hbar$, no loops). The classical gluon field is determined by Gauss’ law using as boundary condition a non-vanishing field strength at spatial infinity. In an equal-time, Hamiltonian...
Ringaile Placakyte
(Deutsches Elektronen-Synchrotron (DE))
QCD and Hadronic Physics
talk
The uncertainties of protons parton distribution functions (PDFs) play a dominant role for the precision tests of the Standard Model (SM) and they also impact substantially the theory predictions of Beyond SM high mass production. We present the HERAFitter project which provides a unique open-source software framework for the determination of the proton's PDFs and for the interpretation of...
Piera Sapienza
(LNS, Catania)
Astroparticle Physics, Cosmology, Gravitation
talk
An unambiguous identification of the emitting neutrino sources of the high-energy cosmic
neutrino flux reported by IceCube requires km3 neutrino telescopes with a large sky coverage
and good angular resolution. The KM3NeT Collaboration aims at building a cubic kilometre
scale neutrino telescope in the depths of the Mediterranean Sea. The detector technology has
been validated with...
German Sborlini
(IFIC-Valencia)
QCD and Hadronic Physics
poster
We present splitting functions in the triple collinear limit at next-to-leading order in the strong coupling. We performed the computation in the context of massless QCD+QED, and consider first collinear processes which include at least one photon. The IR divergent structure of the multi-partonic splitting functions agrees with the Catani's formula. Consistency checks based on symmetry...
Dr
Sanjoy Biswas
(Korea Institute for Advance Study)
Flavour Physics and Fundamental Symmetries
poster
The recent results from the LHCb in the context of $(B^+ \rightarrow K^+ l l)$ decay,
the CMS analysis in the context of right handed $W$-boson ($W_R$) search and CMS searches for the di-leptoquark production show significant deviations from the Standard Model expectations. In this work, we address these seemingly uncorrelated results in the context of $\mathcal{R}$-parity violating...
Katerina Lipka
(Deutsches Elektronen-Synchrotron (DE))
QCD and Hadronic Physics
talk
The impact of recent measurements of heavy-flavour production in deep inelastic ep scattering and in pp collisions on parton distribution functions is studied in a QCD analysis in the fixed-flavour number scheme at next-to-leading order. Differential cross sections of charm- and beauty-hadron production measured by LHCb are used together with inclusive and heavy-flavour production cross...
Bernhard Arnold
(Austrian Academy of Sciences (AT))
Detector R&D and Data Handling
poster
The Global Trigger is the final step of the CMS Level-1 Trigger and implements a trigger menu, a set of selection requirements applied to the final list of objects from calorimeter and muon triggers. The conditions for trigger object selection including topological requirements on multi-object triggers, invariant-mass calculations and other complex operations are combined by simple...
Hideyuki Oide
(CERN)
Detector R&D and Data Handling
poster
Run-2 of the LHC will provide new challenges to track and vertex reconstruction with higher energies, denser jets and higher rates. In addition, the Insertable B-layer (IBL) is a fourth pixel layer, which has been inserted at the centre of ATLAS during the shutdown of the LHC. We will discuss improvements to track reconstruction developed during the two year shutdown of the LHC. These include...
Saranya Samik Ghosh
(Tata Inst. of Fundamental Research (IN))
QCD and Hadronic Physics
poster
Production of electroweak bosons, heavy quarks and jets in proton-proton collisions probe different aspects of QCD and are sensitive to the details of proton structure, expressed by parton distribution functions (PDFs). Precise measurements of cross sections of these processes are used by the CMS experiment to demonstrate the impact of the LHC data on the PDFs and their precision. The...
Manfred Jeitler
(Austrian Academy of Sciences (AT))
QCD and Hadronic Physics
poster
The first measurement of the cross section of inelastic proton-lead collisions at 5.02 TeV center-of-mass energy per nucleon-pair is presented. The cross section is corrected for effects beyond the experimental acceptance of CMS. Photon-induced interactions are studied in detail and are excluded from the result, as well as quasi-elastic excitation of the lead nuclei. The data is compared to...
Dr
Sergej Schuwalow
(DESY, Hamburg)
Detector R&D and Data Handling
poster
The objective of FCAL Collaboration is to design and optimize the very
forward region of future Linear Collider detectors. This comprises the
development a luminosity calorimeter, LumiCal, for precise luminosity
measurement, and a development of a radiation hard beam monitor detector,
BeamCal, for a fast luminosity determination and beam parameters control.
Together with low angle...
Tristan McLoughlin
(Trinity College Dublin)
Non-Perturbative Field Theory and String Theory
talk
We formulate, and provide checks of, a set of functional equations
appropriate to worldsheet form factors in the massive, integrable
but non-relativistic, light-cone gauge fixed AdS$_5$ $\times$ S$^5$ string theory.
We show how such form factors can be related to the exact all order
calculation of structure constants in ${\cal N}=4$ super-Yang--Mills by the AdS/CFT
correspondence.
Ursula Laa
(LPSC Grenoble)
Higgs and New Physics
poster
ATLAS and CMS have performed a large number of searches for physics beyond the Standard Model (BSM). The results are typically presented in the context of Simplified Model Spectra (SMS), containing only a few new particles with fixed decay branching ratios, yielding generic upper limits on the cross section as a function of particle masses. The interpretation of these limits within realistic...
Ali Khorramian
(IPM and Semnan University)
QCD and Hadronic Physics
talk
We present a comparative analysis of the non-perturbative intrinsic
charm quark contribution in the proton, using the inclusive production
of $\gamma +c $-jet in $ pp $ and $ p\bar{p} $ collisions and for the
kinematic regions that are sensitive to this contribution. We discuss
the $ Q^2 $ evolution of intrinsic quark distributions and present a code that provide these distributions as...
Dr
Roman Nevzorov
(University of Adelaide & ITEP)
Astroparticle Physics, Cosmology, Gravitation
poster
The breakdown of $E_6$ gauge symmetry at high energies may lead to supersymmetric
(SUSY) models based on the Standard Model (SM) gauge group together with extra
$U(1)_N$ gauge symmetry under which right--handed neutrinos have zero charge.
To ensure anomaly cancellation and gauge coupling unification the low energy matter
content of these models involve three $27$ representations of $E_6$...
Giulio Mezzadri
(Universita di Ferrara (IT))
QCD and Hadronic Physics
poster
The BESIII experiment has accumulated a large sample of $J/\psi$, $\psi'$ and $\psi(3770)$ data set. Through these charmonium radiative and hadronic decays, we can explore the light hadron spectroscopies. In this talk, we will report our recent results on the properties of the X states, such as X(1835) and X($p\bar{p}$), study of $J/\psi\to$ radiative decays ($J/\psi\to \gamma K_sK_s\eta$,...
Matthias Saimpert
(CEA/IRFU,Centre d'etude de Saclay Gif-sur-Yvette (FR))
Top and Electroweak Physics
talk
The scheduled installation of forward proton detectors at the LHC nearby the CMS and ATLAS experiments will provide a -- somewhat surprising -- opportunity to measure the light-by-light scattering with unprecedented precision by taking advantage of the coherent photon flux emitted by the protons. The detection of the intact protons allows to reconstruct the full kinematic of the event which is...
Aleksander Filip Zarnecki
(Warsaw University),
Katarzyna Wichmann
(Deutsches Elektronen-Synchrotron Hamburg and Zeuthen (DE)),
Oleksii Turkot
(DESY)
Higgs and New Physics
poster
The H1 and ZEUS combined measurement of inclusive deep inelastic cross
sections in neutral and charged current ep scattering, based on the final data sample corresponding to a luminosity of about 1 fb-1, was used as an input to QCD analyses, providing a set of parton distribution functions HERAPDF2.0. Here the analysis is extended to take into account possible signals from physics beyond SM....
Luc Marleau
(Université Laval)
QCD and Hadronic Physics
poster
The original Skyrme model first proposed over half a century ago, is now understood as a low-energy effective theory of QCD where baryons (and nuclei) emerge as topological solitons. It provides a relatively good picture of the nucleons, but it overestimates their binding energies in nuclei by at least an order of magnitude. The present work is based on a recent extension of the original...
Arnd Meyer
(Rheinisch-Westfaelische Tech. Hoch. (DE))
Detector R&D and Data Handling
poster
The luminosity is a key parameter as its uncertainty translates directly to the uncertainty of the measurement of cross sections and background rate predictions, essential to establish the Higgs and search for new particles. During the first three years of data taking at the LHC, CMS used the Hadron Forward calorimeters and the pixel tracking detector for the luminosity measurement. In...
Matthew Wing
(UCL)
QCD and Hadronic Physics
poster
The photoproduction of $D^{*\pm}$ mesons has been measured with the ZEUS detector at HERA at three different $ep$ centre-of-mass energies, $\sqrt{s}$, of 318, 251 and 225\,GeV. For each data set, $D^{*\pm}$ mesons were required to have transverse momentum, $p_T^{D^*}$,
and pseudorapidity, $\eta^{D^*}$, in the ranges $1.9 < p_T^{D^*} < 20$ GeV and $|\eta^{D^*}|<1.6$. The events were...
Cui Li
(Uppsala University)
QCD and Hadronic Physics
poster
Using a data set of 2.9/fb taken at a center-of-mass energy of $\sqrt{s}$ = 3.773 GeV with the BESIII detector at the BEPCII collider, the $e^+e^−\to \pi^+\pi^-$ cross section in the energy range between 600 MeV and 900 MeV is extracted using the method of Initial State Radiation. The cross section is measured and the pion Form factor is extracted. We also calculate its contribution to the...
Alexander Lincoln Read
(University of Oslo (NO))
QCD and Hadronic Physics
poster
The measurements of the jet production cross sections probe the dynamics of QCD and can constrain the parton proton structure. Double-differential cross sections for inclusive, di-, and tri-jet final states are measured for 7 TeV pp collisions with the ATLAS detector and are compared to expectations based on next-to-leading order QCD calculations as well as to next-to-leading order Monte Carlo...
Stefan Kluth
(Max-Planck-Institut fuer Physik (Werner-Heisenberg-Institut) (D)
Fabio Anulli
(Universita e INFN, Roma I (IT))
QCD and Hadronic Physics
poster
Inclusive hadron production cross sections and angular distributions in
e+e- collisions shed light on fundamental questions of hadronization and fragmentation processes. We present measurements of the Collins azimuthal asymmetries in inclusive production of hadron pairs, in the e+e- -> h1 h2 X annihilation process, where the hadrons (either kaons or pions) are produced in opposite...
Valerio Vagelli
(INFN Perugia (IT))
Astroparticle Physics, Cosmology, Gravitation
poster
We present the measurement of the cosmic ray (e$^{+}$+e$^{-}$) flux in the energy range 0.5 GeV to 1 TeV based on the analysis of 10.6 million e$^{\pm}$ events collected by AMS during the first 30 months of data taking. The statistics and the resolution of the AMS detector provide an accurate
measurement in the whole energy range. No features have been observed in the flux, and the...
Maria Aldaya Martin
(DESY)
Top and Electroweak Physics
poster
Normalized differential top quark pair production cross sections are measured in pp collisions at a centre-of-mass energy of 8 TeV at the LHC using the CMS detector. The dataset used for these measurements corresponds to an integrated luminosity of 19.7 fb-1. The measurements are performed in the lepton+jets (e+jets and mu+jets) and in the dilepton (ee, mumu, and emu) decay channels. The ttbar...
Jiri Franc
(Czech Technical University in Prague)
Top and Electroweak Physics
poster
We present the measurement of the inclusive top pair production cross section in proton anti-proton collisions at 1.96 TeV employing the full RunII data (9.7/fb) collected with the D0 detector at the Fermilab Tevatron Collider. We consider the final state of the top quark pair
containing one electron or muon and at least two jets. We select variables according
to statistical tests and...
Arnd Meyer
(Rheinisch-Westfaelische Tech. Hoch. (DE))
Kamil Augsten
(Czech Technical University (CZ))
Top and Electroweak Physics
poster
We present new measurements of the top quark polarization using the D0 detector
at the Fermilab Tevatron Collider. We use the lepton+jets decay channel to
measure angular distributions and extract the polarization of the top quark in
different basis and compare to the SM expectation. The full Run II D0 data
sample is used for this measurement, which corresponds to an integrated
luminosity...
Judith Katzy
(DESY, HAMBURG)
Flavour Physics and Fundamental Symmetries
poster
In this work, we present a measurement of the Bs0—>J/psi phi time–dependent CP asymmetry parameters using the combined Run-1 dataset. Bs0—>J/psi phi decay channel is sensitive to the new physics contributions, and already small deviations in a measurement of phi_s would be hints for the existence of the new particles.
A four-dimensional unbinned maximum likelihood fit, which also includes...
Lorenzo Magaletti
(Universita e INFN, Bari (IT))
Neutrino Physics
poster
The near detector complex of T2K consists of a set of scintillating tracking detectors spanning the beam axis (INGRID) along with a magnetized detector system with fine-grained tracking and calorimetry (ND280). Together, ND280 and INGRID offer unique opportunities for the study of ~1 GeV neutrino interactions, including the possibility to study the energy dependence of the cross section using...
Markus Zinser
(Johannes-Gutenberg-Universitaet Mainz (DE))
Top and Electroweak Physics
The ATLAS Collaboration has performed precision measurements of the transverse momentum of Z/gamma* bosons and their decay lepton angular decorrelation with the phi* observable. Measurements have been performed at 7 and 8 TeV in different di-lepton invariant mass and rapidity regions. These measurements are sensitive to soft resummation effects and hard jet emissions for small and large...
Bijan Haney
(University of Pennsylvania (US))
Higgs and New Physics
poster
We present measurements of the total and differential cross sections of Higgs boson production
that were performed using 20.3~fb$^{-1}$ of $pp$ collisions produced by the Large Hadron Collider
at a center-of-mass energy of $\sqrt{s} = 8$ TeV and recorded by the ATLAS detector. Cross sections
are obtained from measured $H \to \gamma\gamma$ and $H \to ZZ \to 4 \ell$ event yields, which are...
Robert Samuel Thorne
(University College London (UK))
QCD and Hadronic Physics
talk
We present the MMHT2014 PDFs, an update of the previous major release in the same framework, i.e. MSTW2008. We discuss the changes in both the central values and uncertainties in the PDFs due to changes in theoretical procedures and the impact of new, largely LHC data-sets. We note, however, that changes in predictions are rather small. We discuss the correlation between the PDFs and the...
Peter Filip
(Slovak Academy of Sciences (SK))
Heavy Ion Physics
poster
We suggest, that specific decay channels of mesons can be influenced by external electromagnetic field of sufficient strength. In particular, CP - violating decay of Eta meson Eta--> Pi+Pi-, which is limited to BR < 10^-27 in Standard Model, can become enhanced in the magnetic field, and strong decay channel of Rho(770) meson may become suppressed. For heavy Quarkonium-type mesons external...
Benedikt Freund
(KIT - Karlsruhe Institute of Technology (DE))
Detector R&D and Data Handling
poster
After consolidation of the LHC in 2013/14 its centre-of-mass energy will increase to 13TeV and the luminosity will reach 2 · 10³⁴ cm⁻² s⁻¹, which is twice the design luminosity. The latter will result in more simultaneous particle collisions, which would significantly increase the dead time of the current readout chip of the CMS pixel detector. Therefore the entire CMS pixel detector is...
Jon Coleman
(University of LIverpool)
Neutrino Physics
poster
Preventing nuclear proliferation is a high priority for the international community. Monitoring of nuclear facilities to detect unauthorised removal of fissile materials from operational cores is central to this. Anti-neutrino flux and spectral information can be used to determine instantaneous reactor power, and, relative core content of uranium and plutonium.
A tonne-scale prototype...
Hannah Elizabeth Herde
(Brandeis University (US))
Detector R&D and Data Handling
poster
The ATLAS muon reconstruction has been improved for the Run-II of the LHC.
In this presentation, we will discuss the new reconstruction algorithm and its performance
as measured during the early run of the LHC in 2015 at sqrt(s)= 13 TeV
using samples of J/ψ→μμ and Z→μμ decays.
Reconstruction efficiency, transverse momentum resolution and momentum scales are
measured in the various...
Daniel Martin Saunders
(University of Bristol (GB)),
Daniel Saunders
(Bristol University.)
Neutrino Physics
poster
The SoLid experiment aims to make a measurement of very short distance neutrino oscillations using reactor antineutrinos. Key to its sensitivity are the experiment's excellent spatial and energy resolution, combined with a highly suitable reactor source and good background rejection. The fine segmentation of the detector, and ability to resolve signals in space and time, gives SoLid the...
Mr
Simon Vercaemer
(SoLid)
Neutrino Physics
poster
The SoLid experiment aims to make a measurement of very short baseline neutrino oscillations using
reactor anti-neutrinos. For this purpose, a highly segmented detector was build out of PVT cubes
lined with a $^6$LiF:ZnS(Ag) layer.
Unlike neutrino experiments conducted deep underground, neutrino detectors used in a reactor
environment need to tolerate high levels of background radiation....
Prof.
Eva-Maria Kabuss
(Mainz University)
QCD and Hadronic Physics
talk
The COMPASS experiment at CERN performs a rich program in inclusive (DIS) and
semi-inclusive (SIDIS) deep inelastic scattering of longitudinally polarised
muons off longitudinally polarised nucleons. The main topic is the
investigation of the spin structure of the nucleon in terms
of quark and gluon polarisations. For the extraction of the contribution
of the different quarks flavours...
Dr
Sayaka Kawabata
(Tohoku University)
Top and Electroweak Physics
talk
We propose a new method to measure the top quark mass at the LHC. This method requires only lepton energy distribution and is basically independent of the production process of the top quark. With this method, the pole and MSbar masses of the top quark can be determined. We investigate the experimental viability of the method performing a detailed simulation analysis at the leading order. The...
Prof.
Sankagiri Umasankar
(Indian Institute of Technology Bombay)
Flavour Physics and Fundamental Symmetries
poster
The VuQ model involves the addition of a vector isosinglet
up-type quark to the standard model. In this model the full CKM
quark mixing matrix is $4 \times 3$. Using present flavor-physics
data, we perform a fit to this full CKM matrix, looking for signals
of new physics (NP). We find that the VuQ model is very stronly
constrained. There are no hints of NP in the CKM matrix,...
Stefanos Leontsinis
(National Technical Univ. of Athens (GR))
Flavour Physics and Fundamental Symmetries
poster
The associated production of vector boson with heavy quarkonia is a key observable for understanding the quarkonium production mechanisms. In this poster we present the first evidence of the production of the Z boson in association with a prompt and non-prompt J/ψ meson and measure its production rate in comparison of the inclusive Z production. Relative contributions to the signal from single...
Mariusz Sadzikowski
(Jagiellonian University)
QCD and Hadronic Physics
poster
A contribution to J/psi hadroproduction is analyzed in which the meson production is mediated by three-gluon partonic state, with two gluons coming from the target and one gluon from the projectile. This mechanism involves double gluon density in one of the protons, hence this contribution enters at a non-leading twist. It is, however, relevant due to an enhancement factor coming from large...
Dr
Alexander Bylinkin
(MIPT)
QCD and Hadronic Physics
poster
Overview of the two component model for hadroproduction based on the recently published papers is presented. The transverse momentum spectra of hadrons produced in high energy collisions can be decomposed into the two components: the exponential (thermal) and the power (hard) ones. Thus, charged hadron spectra produced in various interactions and measured in different experiments from ISR to...
Dr
Vasilij Kushpil
(Nuclear Physics Institute ASCR), Mr
Vasily Mikhaylov
(Nuclear Physics Institute ASCR)
Heavy Ion Physics
poster
Particle flow and reaction plane reconstruction performance using the Projectile Spectator Detector (PSD) in the CBM experiment at the future FAIR facility will be presented. The PSD is a compensating lead-scintillator calorimeter designed to measure the energy distribution of the forward going projectile nucleons and nuclei fragments (spectators) produced close to the beam rapidity. The main...
Ali Khorramian
(IPM and Semnan University)
poster
The measurement of $t\bar{t}$ differential
production cross sections provides a direct test of QCD. We
present the comparison of top quark differential cross section in
$p\bar{p}$ collisions (D0) at $\sqrt{s}$=1.96
TeV as a function of the transverse momentum using various
PDFs.These cross sections are calculated in next-to-next-to-leadig
order(NNLO) in QCD using DiffTop package. Our...
Juan Rojo Chacon
(University of Oxford (GB))
QCD and Hadronic Physics
talk
I present NNPDF3.0, the first set of parton distribution functions (PDFs) determined
with a methodology validated by a closure test. NNPDF3.0 uses a global dataset including HERA-II deep-inelastic inclusive cross-sections, the combined HERA charm data, jet production from ATLAS and CMS, vector boson rapidity and transverse momentum distributions from ATLAS, CMS and LHCb, $W$+$c$ data from...
Arnd Meyer
(Rheinisch-Westfaelische Tech. Hoch. (DE))
QCD and Hadronic Physics
talk
Recent results on PDF constraints from CMS are presented.
Valerio Rossetti
(Stockholm University (SE))
Detector R&D and Data Handling
poster
The ATLAS general-purpose experiment at the Large Hadron Collider
(LHC) is equipped with electromagnetic and hadronic liquid-argon (LAr)
calorimeters and a hadronic scintillator-steel sampling calorimeter
(TileCal) for measuring energy and direction of final state particles
in the pseudorapidity range $|\eta| < 4.9$.
The calibration and performance of the calorimetry system...
Fengwangdong Zhang
(Universite Libre de Bruxelles (BE))
Detector R&D and Data Handling
poster
In preparation for collecting the pp collisions from the upgraded LHC at an unprecedented energy (13 TeV) and rate (40MHz), the CMS collaboration has prepared an array of triggers utilizing jets and missing transverse energy for searches for new physics at the energy frontier. The CMS trigger system must be able to sift through the collision events in order to extract events of interest at a...
Prof.
Roland Allen
(Texas A&M University)
Higgs and New Physics
poster
In condensed matter physics, the theory of spin–charge separation dates back to the 1950 paper of Tomonaga, but experimental confirmation came only after almost a half century. Here we consider the possibility of a similar phenomenon — inspired in part by the reality of Higgs bosons, and therefore of at least one Higgs condensate — which would potentially be observable in Run 2 of the LHC....
Beata Krupa
(Institute of Nuclear Physics Polish Academy of Sciences)
QCD and Hadronic Physics
poster
The first measurement of the photon structure functions has been performed using the PLUTO detector at the DESY storage ring PETRA (1981). Following this pioneering work many experiments have been performed at all high energy $e^{+}e^{-}$ and ep storage rings. In spite of many researches there are still a lot of issues to be addressed. The last papers containing the experimental data of the...
Peter Drechsel
Higgs and New Physics
poster
The NMSSM represents an elegant and well motivated alternative description for the observed phenomenology in high energy physics. In this theory a scalar singlet together with its superpartner is added to the Higgs-sector of the Minimal Supersymmetric Standard Model (MSSM). In order to allow significant testing of the NMSSM by experiments precise predictions for the parameters of the theory...
Badder Marzocchi
(Universita & INFN, Milano-Bicocca (IT))
Detector R&D and Data Handling
poster
The LHC Run 2 has recently begun, with proton-proton collisions at an unprecedented centre-of-mass energy of 13 TeV and will soon move to a reduced bunch spacing of 25ns.
After the successful quest for a Higgs boson via its electromagnetic decays, and the subsequent measurement of its mass, the CMS electromagnetic calorimeter (ECAL) is at the forefront of precision measurements and the...
Nestor Armesto Perez
(Universidade de Santiago de Compostela (ES))
QCD and Hadronic Physics
poster
The LHeC is a proposed upgrade of the LHC to study ep/eA collisions in the TeV regime, by adding a 60 GeV electron beam through an Energy Recovery Linac. New evaluations are presented on the prospects for precisely determining the proton PDFs, with complete flavour unfolding
in a single experiment, and the strong coupling constant with per mille accuracy.
Jakub Cuth
(Johannes Gutenberg Universitat Mainz (DE))
Top and Electroweak Physics
poster
The D0 experiment at the Tevatron collider provided in recent years one of the most accurate measurements of the W boson mass. The precise knowledge of the W boson mass, together with the mass of the Higgs Boson and the top quark, provides one of the most crucial tests of the Standard Model of particle physics.
The uncertainties of this measurement are dominated by the limited knowledge of...
Dr
Alejandro Gutierrez-Rodriguez
(Universidad Autónoma de Zacatecas)
Neutrino Physics
poster
In this work we study the potential of the processes $e^+e^- \to e^+\gamma e^- \to e^+\tau \bar\nu_\tau \nu_e $
and $e^+e^- \to e^+\gamma \gamma e^- \to e^+\nu_\tau \bar\nu_\tau e^- $ at a future high-energy and high-luminosity
linear electron positron collider, such as the ILC and CLIC to study the sensibility on the anomalous magnetic
and electric dipole moments of the tau-neutrino. For...
Dr
Maria A. Hernandez-Ruiz
(Universidad Autonoma de Zacatecas)
Flavour Physics and Fundamental Symmetries
poster
We probe the U(1)$_{B-L}$ model via the process $e^+ e^- \rightarrow \nu \bar{\nu} \gamma$. We also analyzed the effects of extra gauge boson $Z^\prime$ in the cross section at high energy linear $e^+ e^-$ collider and high luminosity; namely, International Linear Collider (ILC) and Compact Linear Collider (CLIC).
Maxim Eingorn
(urn:Facebook)
Astroparticle Physics, Cosmology, Gravitation
poster
The following recent results concerning multidimensional Kaluza-Klein (KK) models with different types of compactification of extra spatial dimensions (ESDs) are discussed in detail. First, in the case of toroidal compactification, dust-like gravitational field sources are incompatible with relativistic tests in the Solar system. Such non-dust-like sources as latent solitons (particularly,...
Antoni Szczurek
(Institute of Nuclear Physics),
Rafal Maciula
(Institute of Nuclear Physics PAN)
Antoni Szczurek
(Institute of Nuclear Physics),
Piotr Lebiedowicz
(Institute of Nuclear Physics PAN)
Higgs and New Physics
poster
We present differential cross sections for production
of charged scalar, weakly interacting, particles
via photon-photon fusion in the $p p \to p p H^+ H^-$ reaction
with exact kinematics.
We give predictions for $\sqrt{s}$ = 14~TeV (LHC)
and at the Future Circular Collider (FCC) for
$\sqrt{s}$ = 100~TeV.
We present distributions in rapidities, transverse momenta and
correlations in...
Wolfgang Schaefer
(Institute of Nuclear Physics PAN)
QCD and Hadronic Physics
poster
We present a formalism which uses fluxes of equivalent photons including transverse momenta of the intermediate photons. The formalism reminds the familiar kt-factorization approach used, e.g., to study the two-gluon production of cc¯ or bb¯ pairs. The results of the new method are compared with those obtained using the code LPAIR, and a good agreement is obtained. The inclusion of the photon...
Olga Grzymkowska
QCD and Hadronic Physics
poster
The Belle collaboration has recently performed extensive studies of charmed hadrons and charmonium states produced from B meson decays utilizing its $711~{\rm fb}^{−1}$ data set collected at the $\Upsilon(4S)$ resonance.
We present measurement of $B\to D^- D_{s0}^{\star}(2317)$ decay rates and a search for isospin partners of the $D_{s0}^{\star}(2317)^+$. In addition, we present the study...
Maurizio Bonesini
(Universita & INFN, Milano-Bicocca (IT))
Accelerators
poster
Muon beams of low emittance provide the basis for the Neutrino Factory and the Muon Collider. The international Muon Ionization Cooling Experiment (MICE) will demonstrate the reduction through ionization cooling of the phase-space volume occupied by a muon beam. Ionization cooling combines isotropic deceleration by absorbing materials with RF acceleration in the beam direction.
MICE is...
Collaboration H1 and ZEUS
(DESY)
QCD and Hadronic Physics
talk
The new combined inclusive HERA cross sections were input to QCD
analyses at NNLO, NLO and LO providing a new set of parton
distribution functions, HERAPDF2.0. Besides the small experimental
uncertainties, model and parameterisation uncertainties were also
considered. The consistency of data and the QCD fit was tested for
variants of the fit such as the treatment of heavy flavour...
Collaboration H1 and ZEUS
(DESY)
QCD and Hadronic Physics
talk
An extendend QCD analysis of the new combined inclusive HERA was
performed at NLO, also including HERA data on jet and charm production.
This enables the simultaneous measurement of parton distribution
functions and the strong coupling using data from HERA alone. The strong
coupling is measured to be $\alpha_s(M_Z)$= 0.1182 ±0.0008(exp) ±0.0005(model/param.) ±0.0012(hadronisation)...
Ishita Dutta Choudhury
(S N Bose National Centre for Basic Sciences)
QCD and Hadronic Physics
poster
We investigate the effect of a small gauge-invariant mass of the gluon on anomalous chromomagnetic moment of quarks (ACM), by perturbative calculations at one-loop. We use the topological mass generation mechanism, in which the gluon acquires a mass via an interaction with an antisymmetric tensor field $B_{\mu \nu}$. For a small gluon mass $(M_g <10$ MeV), we give our results at momentum...
Marcello Abbrescia
(Universita e INFN, Bari (IT))
Detector R&D and Data Handling
poster
The CMS muon system is based on three types of gaseous detectors, RPC, CSC and DT. While operating very well in the present conditions, upgrades are foreseen for each of the subsystems, necessary to guarantee its delicate role of muon triggering and tracking also in the High Luminosity phase of LHC, foreseen to start after Long Shutdown 3 in 2024 and to last for about 10 years.
Studies...
Dr
Vasilij Kushpil
(Nuclear Physics Institute ASCR), Mr
Vasily Mikhaylov
(Nuclear Physics Institute ASCR)
Detector R&D and Data Handling
poster
Modern avalanche photodiodes (APDs) with high gain are excellent device candidates for the light readout from detectors used for the high energy physics experiments. We report the results of the APDs radiation hardness study. Properties of APDs manufactured by Zecotek, Ketek and Hamamatsu companies are studied in terms of internal defects accumulation. Test setups for offline and online APD...
Jeffrey Wayne Hetherly
(Southern Methodist University (US))
Detector R&D and Data Handling
poster
In high-energy physics experiments, online selection is crucial to select interesting collisions from the large data volume. ATLAS b-jet triggers are designed to identify heavy-flavour content in real-time and provide the only option to efficiently record events with fully hadronic final states containing b-jets. In doing so, two different, but related, challenges are faced. The physics goal...
Fabio Anulli
(Universita e INFN, Roma I (IT))
QCD and Hadronic Physics
poster
The BABAR Collaboration has an extensive program of studying hadronic cross sections in e+e- collisions at low-energies, which are accessible at center-of-mass energy of about 10.6 GeV via initial-state radiation. Our measurements allow significant improvements in the precision of the predicted value of the muon anomalous magnetic moment. These improvements are necessary for shedding light on...
Lukas Gruber
(Stefan Meyer Institute, Austrian Academy of Sciences)
Detector R&D and Data Handling
poster
In recent years, the Silicon Photomultiplier (SiPM) started to replace the vacuum PMT in many of the photosensing demands, ranging from high energy physics to medical imaging. One of the important parameters of photodetectors, especially with regard to the usage in modern particle physics experiments, is the performance in high rate environments. In order to characterize the rate capability...
Ram Krishna Dewanjee
(Tata Inst. of Fundamental Research (IN))
Higgs and New Physics
poster
A search for a Higgs boson (H) decaying into a pair of lighter (Standard Model like) 125 GeV Higgs bosons (h) or a Higgs boson (A) decaying into a Z boson and an h boson is presented. This search is performed on a dataset corresponding to an integrated luminosity of 19.7 fb−1 of pp collision data collected by CMS in 2012. A final state consisting of two tau leptons and two b-jets is used to...
Badder Marzocchi
(Universita & INFN, Milano-Bicocca (IT))
Higgs and New Physics
poster
The most recent CMS results on the search for a high mass particle decaying into two photons in the high mass region [150,850] GeV and into a Z boson and a photon in the region [200,500] GeV, using the full dataset recorded at the LHC from pp collisions at the centre of mass energy of 8 TeV will be described. Results will also be presented on the search for a Higgs boson particle decaying into...
Cecile Sarah Caillol
(Universite Libre de Bruxelles (BE))
Higgs and New Physics
poster
A search for a light pseudoscalar Higgs boson produced in association with a pair of b-quarks and decaying to a pair of tau leptons is performed in the context of two-Higgs-doublet models (2HDM). The results are based on an integrated luminosity of 19.7 fb−1 at a center-of-mass energy of 8 TeV accumulated by the CMS experiment at LHC in 2012. Pseudoscalar masses between 25 and 80 GeV are...
Andreas Pichler
Flavour Physics and Fundamental Symmetries
poster
A. Pichler for the VIP2 collaboration
The Pauli Exclusion Principle (PEP) is the foundation for our understanding of many fields of physics where systems of fermions are concerned. Since no simple explanation for the principle exists, it remains to be a postulate open to experimental tests, which are difficult as there is no well-established theory to predict a violation in a quantitative...
Attilio Picazio
(Universite de Geneve (CH))
poster
A search for narrow diboson resonances in a dijet final state is performed in 20.3 fb-1 of proton- proton collisions at a center-of-mass energy of sqrt(s) = 8 TeV, collected in 2012 by the ATLAS detector at the Large Hadron Collider. The jet mass and jet substructure properties have been used to tag each jet as a boson. Using the invariant mass distribution of the boson tagged dijet system,...
Alexey Guskov
(Joint Inst. for Nuclear Research (RU))
QCD and Hadronic Physics
poster
The $Z_{c}(3900)$ hadron state has been found by the BES-III experiment in the decay
of a hadron state with higher mass.
The first attempt to search for the direct exclusive production of the $Z_c^{\pm}(3900)$ hadron by
virtual photons has been performed in the channel $Z_c^{\pm}(3900)\rightarrow J/\psi \pi^{\pm}$ at COMPASS.
The data cover the range from 7 GeV to 19 GeV in the...
Catrin Bernius
(New York University (US))
Higgs and New Physics
poster
A search is performed for Higgs-boson decays to neutralinos and/or gravitinos in events with at least one photon, missing transverse momentum and two forward jets, a topology where vector boson fusion production is enhanced. The analysis is based on a dataset of proton-proton collision data taken at s√ = 8 TeV delivered by the Large Hadron Collider and recorded with the ATLAS detector,...
Ozan Arslan
(Universitaet Bonn (DE))
Top and Electroweak Physics
poster
A search for anomalous single top-quark production via strong
avour chang-
ing neutral currents has been performed. Data collected by the ATLAS exper-
iment in 2012 at a centre-of-mass energy
$\sqrt s$ = 8 TeV, and corresponding to
an integrated luminosity of 20.3 $fb^{-1}$ are used. Events in which a light quark
(u or c) interacts with a gluon to produce a single top quark are sought....
Benjamin Eric Kaplan
(New York University (US))
Higgs and New Physics
poster
The recently discovered Higgs boson at a mass 125 GeV provides an excellent tool to probe beyond
the Standard Model physics. Many extensions of the Standard Model predict the decay of the Higgs
boson into weakly interacting or neutral particles which do not interact with the detector, that could be
candidates for dark matter. Using proton-proton collision data collected by the ATLAS...
Kuhan Wang
(McGill University (CA))
Higgs and New Physics
poster
A search for evidence of physics beyond the Standard Model in the production of final states with multiple high transverse momentum jets, using 20.3 fb−1 of proton-proton collision data recorded by the ATLAS detector at √s = 8 TeV is presented. No excess of events beyond Standard Model expectations is observed, and upper limits on the visible cross-section for non-Standard Model production of...
Fabio Anulli
(Universita e INFN, Roma I (IT))
Higgs and New Physics
poster
We report on a search for new $\pi^0$-like particles produced in association with a tau-lepton pair at BABAR. Those objects, with mass and decay modes similar to those of a neutral pion, could provide an explanation for the apparent non-asymptotic behavior of the pion-photon transition form factor, as observed by BABAR. No significant signal is observed, and limits on the production cross...
Giuseppe Fasanella
(Universite Libre de Bruxelles (BE))
Higgs and New Physics
poster
The recent discovery of a Higgs boson at the LHC sets strong constraints
on a simple, sequential third generation of quarks. Still, the presence
of new physics is necessary to stabilize the mass of the Higgs boson, if
one wants to avoid an unnaturally high level of fine tuning of the theory.
In supersymmetry, bosonic top quark partners would cancel the loops that
induce this large...
Mario Merola
(Universita e INFN, Napoli (IT))
Top and Electroweak Physics
poster
A search for single top quark production in the s channel in proton-proton collisions with the CMS detector at the LHC is presented. Leptonic decay modes of the top quark with an electron or muon in the final state are considered. The signal is extracted by performing a maximum-likelihood fit to the distribution of a multivariate discriminant defined using Boosted Decision Trees to separate...
Manfredi Ronzani
(Albert-Ludwigs-Universitaet Freiburg (DE))
Higgs and New Physics
poster
Many extensions of the Standard Model (SM) include heavy coloured particles, such as the squark
and gluinos of supersymmetric (SUSY) theories, which could be accessible at the Large Hadron
Collider (LHC) and detected by ATLAS. The current searches in the LHC run-1 dataset have yielded
sensitivity to TeV scale gluinos, as well as to squarks in the hundreds of GeV mass range. The...
Sara Alderweireldt
(University of Antwerp (BE))
Higgs and New Physics
poster
A search for a standard model Higgs boson in the vector boson fusion production mechanism with decay to bottom quarks is presented. The search analyzes two data samples of proton-proton collisions at sqrt(s) = 8 TeV, collected with the CMS detector during 2012, comprising of 19.8 fb^-1 (prompt) and 18.3 fb^-1 (parked). Upper limits on the product of the cross section and the branching fraction...
Leonid Serkin
(INFN Gruppo Collegato di Udine and ICTP Trieste (IT))
Higgs and New Physics
poster
A search for the Standard Model Higgs boson produced in association with a pair of top quarks (ttH) and
decaying into a pair of bottom quarks (H→bb) is presented. The search is focused on the semileptonic
decay of the tt system and exploits different topologies given by the jet and b-tagged jet multiplicities
of the event. A neural network is used to discriminate between signal and...
Bob.Hirosky DZERO.PHYSICS.COORDINATOR
(DZero Experiment, Fermilab),
Boris.Tuchming DZERO.PHYSICS.COORDINATOR
(DZero Experiment, Fermilab)
Higgs and New Physics
poster
We present a search for the associated production of a Higgs boson
with top anti-top pairs in proton anti-proton collisions at a
center-of-mass energy of 1.96 TeV using a data sample of $9.7\;\rm
fb^{-1}$ of integrated luminosity, which corresponds to the entire Run
II D0 dataset. Distributions of the $H_{T}$ variable
separated into 3 jet, 4 $b$-tagging and 2 lepton categories were...
Judith Katzy
(DESY, HAMBURG)
Higgs and New Physics
poster
The recently discovered Higgs boson at a mass 125 GeV provides an excellent tool to probe beyond
the Standard Model physics. Many extensions of the Standard Model predict the decay of the Higgs
boson into weakly interacting or neutral particles which do not interact with the detector, that could be
candidates for dark matter. Using proton-proton collision data collected by the ATLAS...
Daniela Salvatore
(Universita della Calabria (IT) - INFN)
Higgs and New Physics
poster
Searches for the decay of neutral, weakly interacting, long-lived particles using data collected by the ATLAS detector at the LHC are presented. These analyses use the full dataset recorded in 2012: 20.3 fb−1 of proton--proton collision data at s√=8 TeV. The first analysis is sensitive to long-lived particles that decay to Standard Model particles producing jets at the outer edge of the ATLAS...
Merve Sahinsoy
(Bogazici University (TR))
Higgs and New Physics
poster
The naturalness argument for theories beyond the Standard Model supports the presence of fermionic top/bottom quark partners, usually referred to as vector-like quarks (VLQs). Searches for vector-like quarks have been performed in various final states with leptons, jets and missing transverse momentum at the ATLAS experiment. This poster summarizes recent VLQ searches at ATLAS with LHC Run 1 data.
Andrej Liptaj
(Slovak Academy of Sciences (SK))
QCD and Hadronic Physics
poster
Covariant quark model is an effective theory approach to hadron physics with several appealing features. The model is based on a non-local Lagrangian density which gives the model a full Lorentz invariance. It has limited number of free parameters and provides nice description of experimental measurements. It is well suited for description of rare decays of (heavy) hadrons, an important area...
Arnd Meyer
(Rheinisch-Westfaelische Tech. Hoch. (DE))
QCD and Hadronic Physics
talk
A measurement of the underlying event activity in pp collisions is performed using events with a leading charged particle or charged particle jet produced at central pseudorapidity and of transverse momentum in the range of 1 to 100 GeV. The underlying event activity is measured independently in the two halves of the transverse region with the maximum as well as minimum activities. The results...
Ms
Celine Moortgat
(UGent)
Neutrino Physics
poster
The SoLid experiment aims to resolve the reactor anti neutrino anomaly by searching for short baseline neutrino oscillations. The experiment makes use of a novel detector technology based on the combination of 5cm$\times$5cm$\times$5cm PVT cubes and 6LiF:ZnS screens. This technology provides an improvement for the background rejection capabilities, the neutron identification and the...
Dr
Valery Lyuboshitz
(Joint Institute for Nuclear Research, Dubna)
Flavour Physics and Fundamental Symmetries
poster
The spin structure of the processes $e^+e^−$ -> $ \mu^+\mu^−$ and gg -> $e^+e^−$ are theoretically investigated. It is demonstrated that, if the primary particles are unpolarized, the final state lepton pair remains unpolarized as well but their spins prove to be strongly correlated. Explicit expressions for the elements of the spin density matrices and the components of the correlation...
Dr
Valery Lyuboshitz
(Joint Institute for Nuclear Research, Dubna)
QCD and Hadronic Physics
poster
The structure of the nucleon charge-exchange process $n + p \rightarrow p + n$ is theoretically investigated on the basis of the isotopic invariance of the nucleon-nucleon scattering. By using the operator of permutation of the spin projections of the neutron and proton, the connection between the spin
matrices, which describe the amplitude of the "forward" nucleon charge-exchange process and...
Mark Alastair Rayner
(Universite de Geneve (CH))
Neutrino Physics
poster
Hyper-Kamiokande (Hyper-K), a proposed one-megaton water Cherenkov detector to be built in Japan, is the logical continuation of the highly successful program of neutrino (astro)physics and proton decay using the water Cherenkov technique. In its baseline design, the Hyper-K detector consists of two cylindrical tanks lying side-by-side, the outer dimensions of each tank being 48m x 54m x 250m....
Elena Firu
(ISS - Institute of Space Science (RO))
Detector R&D and Data Handling
poster
The physics aims at the future CLIC high-energy linear e+e- collider set very high precision requirements on the performance of the vertex and tracking detectors. Moreover, these detectors have to be well adapted to the experimental conditions, such as the bunch train structure of the beam and the presence of beam-induced backgrounds. The principal challenges are: a point resolution of a few...
Dmitri Melikhov
(SINP, Moscow State University and HEPHY)
QCD and Hadronic Physics
poster
We discuss strong couplings $g_{VPP}$ and $g_{VVP}$ ($V$ and $P$ being
vector and pseudoscalar mesons, respectively) containing one charm and one light quark ($u$, $d$,or $s$) or two charm quarks. We demonstrate that many existing results from QCD sum rules exhibit an unrealistic picture of $SU(3)$-violating effects. We present new calculations of these couplings from the relativistic...
Dr
Benoît Blossier
(CNRS)
Flavour Physics and Fundamental Symmetries
poster
Using Heavy Meson Chiral Perturbation Theory is very popular to extrapolate
to the chiral limit phenomenologically relevant quantities of heavy flavour
physics that are computed on the lattice at unphysically large pion masses.
We show that the effect of the first orbital excitation may be not
negligible in chiral loops because the corresponding pionic coupling is
large. We have extracted...
Bob.Hirosky DZERO.PHYSICS.COORDINATOR
(DZero Experiment, Fermilab),
Boris.Tuchming DZERO.PHYSICS.COORDINATOR
(DZero Experiment, Fermilab)
QCD and Hadronic Physics
talk
Two measurements of the properties of double parton scattering in $p\bar{p}$ collisions at $\sqrt{s} = 1.96$ TeV are presented through measurement of the cross sections of simultaneous production of two heavy quarkonia (two J/psi or J/psi and Upsilon) or the production of diphoton + dijet events. Multiple parton interactions are a major background for electroweak precision measurements and new...
Matthew Gignac
(University of British Columbia (CA))
Detector R&D and Data Handling
poster
The instantaneous luminosity of the Large Hadron Collider at CERN will be increased up to a factor of five with respect to the design value by undergoing an extensive upgrade
program over the coming decade. The largest upgrade project for the ATLAS Muon System is the replacement of the present first station in the forward regions with the so-called
New Small Wheels (NSWs), to be installed...
Fabio Anulli
(Universita e INFN, Roma I (IT))
QCD and Hadronic Physics
poster
We study the reaction e+ e− -> gamma_ISR J/psi, where J/psi -> pi+ pi- pi0, and J/psi -> K+ K- pi0, using events obtained from the Initial State Radiation process. We measure the relative J/psi branching fraction and perform a Dalitz plot analysis of both J/psi decay modes using an isobar and a Veneziano model.
We present also an analysis of the process gamma gamma -> K anti-K pi. We...
Fabio Anulli
(Universita e INFN, Roma I (IT))
QCD and Hadronic Physics
poster
We report on recent searches for baryonic B decays using the whole BABAR dataset of 471 million B anti-B pairs. Although about 7% of all B decays have baryons in the final state, known exclusive decay modes account for only about 10% of these decays, and very little is known about the mechanism of baryon production in weak decays or in the hadronization process. By studing such decays we...
Vladimir Druzhinin
(BINP, Novosibirsk, Russia)
QCD and Hadronic Physics
poster
We present results of the experiments carried out at the VEPP-2000 e+e-
collider with the SND detector. The reactions e+e- -> rho pi, omega pi, rho
eta, omega eta have been studied in the energy region 1.05-2.00 GeV. The
measured cross sections have been fitted in the VMD model. Parameters of
excited light vector states have been extracted. The neutron and
proton electromagnetic form...
Alexandra Carvalho Antunes De Oliveira
(Universita e INFN, Padova (IT))
Higgs and New Physics
poster
The production of the pairs of Higgs bosons provides a direct handle on the structure of the Higgs field potential.While the HH production within the SM is very small and essentially out of the experimental reach within the Run I or II, several beyond SM theories foresee an enhancement that can be already probed with the available data. First searches for resonant and non-resonant productions...
Nicolas Arnaud
(LAL (CNRS-IN2P3))
QCD and Hadronic Physics
poster
In an e+e- B factory charmonium states can be produced through different mechanisms, e.g. in e+e- annihilation, in double charmonium production, and in B-meson decays.
Prompt production of J/psi or psi(2S) in association with a second charmonium state has been observed by both the BaBar and Belle experiments in e+e- annihilation at a center-of-mass energy of 10.58 GeV. These processes...
Fabio Anulli
(Universita e INFN, Roma I (IT)),
Vladimir Druzhinin
(BINP, Novosibirsk, Russia),
Vladimir Druzhinin
(BINP, Novosibirsk)
QCD and Hadronic Physics
poster
Using the ISR technique with an undetected photon, the e+e- -> K+K- reaction has been studied with the BABAR detector in the energy region up to 8 GeV. The BABAR data have been used to measure the charged kaon electromagnetic form factor, and, together with data from other experiments, to perform a model-independent determination of the relative phases between single-photon and three-gluon...
Evgeny Solodov
(BudkerINP)
QCD and Hadronic Physics
poster
The CMD3 detector is taking data at the electron-positron collider VEPP2000.
Data from energy scans for center-of-mass energy from 0.32 to 2.0 GeV are
available with the world largest data sample. We present new preliminary
results of data analysis, including e+e- -> pi+pi- cross section, which is
the largest hadronic contribution of the SM calculation of the muon g-2. We
also present...
Flavour Physics and Fundamental Symmetries
poster
We elaborate on a recently found SU(5) relation confined to the up-(s)quark flavour space, that remains immune to large quantum corrections up to the TeV scale. We investigate the possibilities opened by this new window on the GUT scale in order to find TeV-scale SU(5) tests realizable at the LHC. These SU(5) tests appear as relations among observables involving either flavour violation or...
Fabio Anulli
(Universita e INFN, Roma I (IT))
Flavour Physics and Fundamental Symmetries
poster
We present a test of lepton universality through the measurement of the ratio of the branching fraction for Υ(3S) decays into tau leptons to that for decays to a muon pair (R = BF(Y(3S)-> tau+tau-)/BF(Y(3S)->mu+mu-). A violation of lepton universality would be evidence of new physics, for example via the existence of a light CP-odd Higgs boson. This measurement, which makes use of a sample...
Mr
Robin Aggleton
(University of Southampton/Rutherford Appleton Laboratory/University of Bristol)
Higgs and New Physics
poster
Whilst the discovered Higgs boson has so far shown no significant deviation from standard model predictions, there remains the possibility that it could be part of a larger spectrum of exotic Higgs particles, such as those found in supersymmetric standard model theories. In this talk I will explore part of this spectrum by considering the phenomenology of the 4 tau final state from the pair...
Nuno Miguel Goncalves Dos Anjos
(Universitat Autònoma de Barcelona (ES))
Detector R&D and Data Handling
poster
The new centre of mass energy and high luminosity conditions expected for Run 2 at the Large Hadron Collider (LHC) impose more demanding constraints on the ATLAS online trigger than ever before. An immense rate of proton-proton collisions must be reduced from the bunch-crossing rate of 40 MHz to approximately 1 kHz before data can be written on disk for offline analysis. The ATLAS trigger...
Kota Kasahara
(University of Tsukuba (JP))
Detector R&D and Data Handling
poster
Events with muons in the final state are an important signature for many physics topics at the Large Hadron Collider (LHC). An efficient trigger on muons and a detailed understanding of its performance are required. In 2012, the last year of Run 1, the instantaneous luminosity of the LHC reached 7.7x10^33 cm -2s-1 and the average number of events that occur in a same bunch crossing was 25. The...
Allen Irving Mincer
(New York University (US))
Detector R&D and Data Handling
poster
The transverse momentum triggers of the ATLAS experiment at the CERN Large Hadron Collider (LHC) are designed to select collision events with non-interacting particles passing through the detector. Such events provide an interesting probe new physics interactions beyond the Standard Model, but also provide the basis for precise measurements of Standard Model parameters such as Higgs couplings....
Anna Macchiolo
(Max-Planck-Institut fuer Physik (Werner-Heisenberg-Institut) (D)
Detector R&D and Data Handling
poster
To investigate the suitability of pixel sensors using the proven planar technology for the upgraded tracker, the ATLAS Planar Pixel Sensor R&D Project was established comprising 18 institutes and more than 80 scientists. Main areas of research are
• performance assessment of planar pixel sensors at HL-LHC fluences to drive design and process improvements.
• establishment of reliable...
Dominik Steinschaden
(Stefan Meyer Institute)
Detector R&D and Data Handling
poster
The P̅ANDA experiment addresses fundamental questions in hadron and nuclear physics via interactions of antiprotons with nucleus / nuclei. The experiment is currently under construction at the Facility for Antiproton and Ion Research (FAIR) in Darmstadt, Germany. The High Energy Storage Ring will provide an antiproton beam with a momentum range of 1.5 – 15 GeV/c and an average collision rate...
Manfred Valentan
(Austrian Academy of Sciences (AT))
Detector R&D and Data Handling
poster
The innermost Pixel Detector (PXD) of the Belle II experiment makes use of the DEPFET (Depleted P-channel Field Effect Transistor) technology to provide the accurate position measurements that are needed for the reconstruction of B meson decay vertices. It has to work in very challenging conditions: The instantaneous luminosity of 8x10^35 cm^2s^-1 expected at SuperKEKB causes a high event rate...
Francesca Cavallo
(INFN (IT))
Education and Outreach
poster
Building and operating the CMS Detector is a complicated endeavour! Now, more than 20 years after the detector was conceived, the CMS Bologna group proposes to follow the steps of this challenging project by playing "The Higgs Boson Goose Game", illustrating CMS activities and goals.
The concept of the game is inspired by the traditional "Game of the Goose". The underlying idea is that the...
Dr
Benedikt Vormwald
(Hamburg University (DE))
Detector R&D and Data Handling
poster
The CMS silicon pixel and strip trackers provide high efficiency charged particle reconstruction and superb momentum resolution over three decades in energy, and thus play a key role in the CMS physics program. In this talk, the readiness of the silicon tracking detectors for Run II data taking as well as first performance studies will be presented. In light of improvements to the tracker...
Luca Cadamuro
(LLR - Ecole Polytechnique)
Detector R&D and Data Handling
poster
The CMS experiment implements a sophisticated two-level online selection system that achieves a rejection factor of nearly 1E5. The first level (L1) is based on coarse information coming from the calorimeters and the muon detectors while the High Level Trigger combines fine-grain information from all sub-detectors. During Run II, the centre-of-mass energy of the LHC collisions will be...
m Koratzinos
(Universite de Geneve (CH))
Accelerators
poster
The FCC-ee accelerator is under study within the FCC design study as a possible first step towards the ultimate goal of a 100 TeV hadron collider. It is a high luminosity e+e- storage ring collider, designed to cover energies of around 90, 160, 240 and 350GeV ECM (for the Z peak, the WW threshold, the ZH and ttbar cross-section maxima respectively) leading to different operating modes. We...
Alain Blondel
(Universite de Geneve (CH))
Flavour Physics and Fundamental Symmetries
poster
One of the focuses of the Future Circular Collider design study is a high luminosity and high precision e+e- collider with energies ranging from (approx.) the Z peak to above the top quark pair production threshold. This is also a possible first step towards the ultimate goal, a 100 TeV hardon collider. The high luminosity allows to contemplate 10^12-13 Z decays, 10^8 W pairs, 2.10^6 ZH...
Mark Lancaster
(University College London (UK))
Detector R&D and Data Handling
poster
The FNAL E989 experiment is seeking to measure the anomalous magnetic
moment ($a_\mu$) of the muon to a precision (0.14 ppm): four times better
than previously achieved and to extend the sensitivity to a muon
electric dipole moment (EDM) by two orders of magnitude. The
experiment will re-use the E821 BNL storage ring but will be upgraded
with new detectors, kicker magnets, collimators and...
Agnieszka Janina Ilnicka
(University of Zurich / ETH Zurich (CH))
Higgs and New Physics
poster
The Inert Doublet Model (IDM) is one of the simplest extension of the Standard Model in which the scalar sector is augmented by a second scalar doublet. This second doublet does not contribute to Electroweak Symmetry breaking, but due to an exact Z2 symmetry gives rise to the dark sector with stable dark matter candidate. After the discovery of the Higgs boson and fixing the value of its mass,...
Emilie Maurice
(University of Liverpool (GB))
Detector R&D and Data Handling
poster
The main goal of the NA62 experiment at the CERN SPS accelerator is to measure the branching ratio of the ultra-rare K+ → π+νν ̄ decay with 10% accuracy. This will be achieved by detecting about 100 K+ → π+νν ̄ decays with a ratio signal/background ∼ 10 in 2-3 years of data taking. NA62 will use a 750MHz high-energy un-separated charged hadron beam, with kaons corresponding to 6% of the beam,...
Alain Blondel
(Universite de Geneve (CH))
Accelerators
poster
Muon beams of low emittance provide the basis for the intense, well characterised, neutrino beams necessary to elucidate the physics of flavour at the Neutrino Factory and to provide lepton-antilepton collisions up to several TeV at the Muon Collider. The international Muon Ionization Cooling Experiment (MICE) will demonstrate ionization cooling, the technique proposed to reduce the...
Yordan Ivanov Karadzhov
(Universite de Geneve (CH))
Accelerators
poster
Muon beams of low emittance provide the basis for the intense, well-characterised neutrino beams of the Neutrino Factory and for lepton-antilepton collisions at energies of up to several TeV at the Muon Collider. The international Muon Ionization Cooling Experiment (MICE) will demonstrate ionization cooling – the technique by which it is proposed to reduce the µ-beam phase-space volume. MICE...
Andrzej Mikolaj Karamaoun
(University of Alberta (CA))
Detector R&D and Data Handling
poster
Tau triggers are used in a variety of highly anticipated ATLAS physics analyses, including the measurement of the Higgs boson coupling to fermions and searches for Higgs boson partners or heavy resonances decaying into pairs of tau leptons.
As proton-proton collisions at the LHC reach instantaneous luminosities of over 10^34cm^ -2s-1, the strategies for triggering have become more...
Sebastien Kahn
(Centre de Physique de Particules de Marseille (CPPM) (FR))
Detector R&D and Data Handling
poster
Electron and photon triggers covering transverse energies from 5 GeV to several TeV are essential for signal selection in a wide variety of ATLAS physics analyses to study Standard Model processes and to search for new phenomena. Final states including leptons and photons had, for example, an important role in the discovery and measurement of the Higgs particle. Dedicated triggers are also...
Frank Seifert
(IEAP CTU in Prague)
Higgs and New Physics
poster
The measurement of the Higgs Boson and its cross-section in top associated production allows a
direct measurement of the top quark Yukawa coupling at tree level. This can be compared with the indirect
one in gluon-gluon-fusion production. The decay channel of the ttH system in the multilepton final state
gives one of the largest sensitivities. The considered sub-channel is one with two...
Cyril Adamuscin
(Slovak Academy of Sciences (SK))
QCD and Hadronic Physics
poster
We study the contribution of the incoming hadrons' polarization to the differential cross section of the hadron scattering at the ultra low energy limit.
ANTONIO DOBADO GONZALEZ
Higgs and New Physics
poster
In this work we study in detail the case of a strongly interacting electroweak symmetry breaking electroweak sector. Then we study general properties of the amplitudes like analiticy and unitarity starting from a very general non-linear effective Lagrangian. We illustrate the ideas with the Inverse Amplitude Method, one version of the N/D method and another improved version of the K-matrix. In...
Ms
Hoda Nematollahi
(Faculty of Physics, Shahid bahonar University of Kerman, Kerman, Iran)
QCD and Hadronic Physics
poster
We calculate the unpolarized transverse momentum dependent (TMD) quark distributions in the modified chiral quark model ($\chi QM$). To this end, we use the integrated quark densities which are multiplied by a TMD Gaussian factor[1,2]. These integrated distributions are computed applying the $\chi QM$[3] at low $Q^2$ value ($Q^2=0.35 GeV^2$). Finally, we compare our results with corresponding...
Silvia Biondi
(Universita e INFN, Bologna (IT))
Detector R&D and Data Handling
poster
The present ATLAS muon trigger in the barrel region (|eta|<1.05) is based on three layers of RPC chambers. It was designed to run for 10 years at the LHC luminosity of 10^{34} cm^{-2}s^{-1} and operated successfully and with high selectivity during the first run of the LHC. In order to ensure a stable performance of the RPCs until 2035 at the higher rates and at luminosities of 5-7x10^{34}...
Michele Caponero
(Istituto Nazionale Fisica Nucleare Frascati (IT))
Detector R&D and Data Handling
poster
Fibre Gragg Grating (FBG) sensors were used to develop a distributed structural sensing system devoted to assess and validate the mounting procedure of the Gas Electron Multiplier (GEM) films of the GE1/1 chambers of the Compact Muon Solenoid (CMS) experiment at LHC. The large (1m by 0.5m) GEM films must be mechanically stretched to optimal mechanical tension to assure flatness. FBG technology...
Sungmin Hwang
(Technical University of Munich)
Astroparticle Physics, Cosmology, Gravitation
poster
By explicitly constructing the Hilbert space, Higuchi showed that there is a lower bound on the mass of a minimally-coupled free spin-2 field on a curved background. Using the vacuum persistence amplitude, we show that this bound is modified by taking into account additional terms not prohibited by symmetry in the case of a maximally symmetric spacetime. This result can further be generalized...
Mrs
Alison Caldecote
(University of Warwick),
Kayleigh Lampard
(University of Warwick)
Education and Outreach
poster
XMaS ran a project taking 14 female Physics students, aged 16-17 years, to Grenoble, France in April 2015. They visited the EPN Campus where they were introduced to possible science careers at such research facilities, as well as introducing them to the inspirational scientists working there. As a result of the trip, the students were truly inspired, their perceptions and stereotypes of...
Dr
Suzy Lidström
(Uppsala University and Royal Swedish Academy of Sciences)
Education and Outreach
poster
Fundamental physics, as exemplified by the recently discovered Higgs boson, often appears to be disconnected from practical applications and ordinary human life. But this is certainly not the case, because science, technology, and human affairs are profoundly integrated in ways that are not immediately obvious. We illustrate this by defining a ‘Higgs number’ through overlapping activities....
