Massimiliano Bellomo
(CERN)
18/07/2013, 09:00
W and Z boson production have been measured in the electron, muon and tau decay channels.
Total and differential cross sections, defined in terms of the decay lepton kinematics, have been
measured as a function of rapidity and transverse momentum.
Precise measurements of W and Z production, including the polarisations of W bosons and of
tau leptons produced in W decays are presented. They...
Dr
Matthew Wingate
(University of Cambridge)
18/07/2013, 09:00
Flavour Physics and Fundamental Symmetries
Talk presentation
I will give a brief summary of lattice QCD calculations which have an impact on precision heavy flavour physics, focusing on the present status and future outlook.
Dr
Panos Kokkas
(University of Ioannina (GR))
18/07/2013, 09:00
We present CMS results related to constraints on parton distribution functions and the strong coupling constant. Results include recent jet measurements performed with 2011 data taken at center-of-mass energy of 7 TeV and 2012 data taken at 8 TeV, including alphaS constraints from multijet events and PDF+alphaS constraints from jet production cross sections.
Elizabeth Castaneda Miranda
(University of Johannesburg (ZA))
18/07/2013, 09:00
Resonances decaying into a pair of particles are an obvious
place to look for phenomena beyond the Standard Model.
This talk summarises recent results on searches for resonances in pairs of jets, lepton pairs, leptons and missing transverse energy and pairs of photons. Various models models are considered such the Z' and W', the Randall-Sundrum gravitons as well as the ADD large extra...
Michael Weber
(University of Houston (US))
18/07/2013, 09:00
Recent measurements of two–particle correlations in high–multiplicity p–Pb collisions at √sNN = 5.02 TeV revealed a long–range structure (large separation in ∆η) at the near– (∆φ ≃ 0) and away–side (∆φ ≃ π) of the triggering particle [1, 2, 3]. At LHC energies, these ridge–like structures have already been observed in Pb–Pb collisions [4], but also in high–multiplicity pp collisions [5]. In...
Dmitri Melikhov
(M. V. Lomonosov State University)
18/07/2013, 09:15
Flavour Physics and Fundamental Symmetries
Talk presentation
We demonstrate that Borel QCD sum rules for heavy-light currents yield a very strong correlation between the b-quark mass and the resulting decay constant of the B-meson. This opens the possibility of an accurate determination of the b-quark mass from the sum rule using the values of fB and fBs as inputs. Combining recent accurate lattice QCD determinations of fB and fBs with our sum-rule...
Edmund A Berry
(Princeton University (US))
18/07/2013, 09:15
Additional heavy vector bosons such as the Z' and W' are predicted by a number of new physics models. So are leptoquarks, which are particles that carry both lepton and quark number. Extra dimensions models predict the existence of massive diphoton resonances. In this talk, we present the latest results on heavy resonances and leptoquarks at CMS. Searches included are dilepton resonances,...
gauhar abbas
(IMSc Chennai, India)
18/07/2013, 09:15
We determine the strong coupling constant $\alpha_s$ from the $\tau$ hadronic width using renormalization group summed expansion of the
QCD Adler function. The main theoretical uncertainty in the extraction of $\alpha_s$ is due to the way in which renormalization group invariance is implemented and the yet uncalculated higher order terms in the QCD perturbative series. We show that new...
Mauro Villa
(Universita e INFN (IT))
18/07/2013, 09:16
The ATLAS experiment has studied the centrality dependence of global event characteristics in proton-lead collisions at sqrt(s_NN)=5.02 TeV. A total integrated luminosity of 30nb-1 was collected during LHC proton-lead runs in the fall and winter of 2012-13. The centrality of proton-lead collisions was characterized using the total transverse energy measured in the ATLAS forward calorimeter on...
Sangeun Lee
(Kyungpook National University (KR))
18/07/2013, 09:20
We present selected measurements done with W and Z bosons performed with the CMS detector, based on samples of events collected during 2011 and 2012 physics runs. Measurements include W and Z inclusive cross sections, the lepton charge asymmetry in W events, and differential cross sections of Z and Drell-Yan production.
Rikard Enberg
(Uppsala University)
18/07/2013, 09:30
Atmospheric neutrinos are produced in interactions of cosmic rays with Earth's atmosphere. At very high energy, the contribution from semi-leptonic decays of charmed hadrons, known as the prompt neutrino flux, dominates over the conventional flux from pion and kaon decays. This is due to the very short lifetime of the charmed hadrons, which therefore do not lose energy before they decay. The...
Tracey Berry
(University of London (GB))
18/07/2013, 09:30
Events containing several leptons or lepton of similar flavour and electric charge are useful probes of new phenomena due to the low background from Standard Model processes.
We look for anomalous production of prompt like-sign leptons or events with three or more leptons, as well as search for excited leptons, heavy leptons and heavy neutrinos. The searches use data recorded in 2012 at...
Thomas Ruf
(CERN)
18/07/2013, 09:30
Flavour Physics and Fundamental Symmetries
Talk presentation
LHCb has recorded large samples of semileptonic B decays. These provide potential to study CP violation effects in the B0 and Bs0 systems. Decay time-integrated or time-dependent asymmetries between charge-conjugate final states probe CP violation in B(s)0 mixing through the measurement of the parameter Afs (sometimes referred to as Asl). These measurements rely on data-driven techniques...
Monika Sharma
(Vanderbilt University (US))
18/07/2013, 09:32
Measurements of two- and four-particle angular correlations for charged particles emitted in pPb collisions are presented over a wide range in pseudorapidity and full azimuth at CMS. The results are compared to 2.76 TeV semi-peripheral PbPb collision data, collected during the 2011 PbPb run, covering a similar range of particle multiplicities. The observed correlations are characterized by the...
Stefan Soldner-Rembold
(University of Manchester),
Stefan Soldner-Rembold
(University of Manchester (GB))
18/07/2013, 09:40
We present measurements by the CDF and D0 collaborations of properties of W and Z bosons produced in proton-antiproton collisions at a center-of-mass energy of 1.96 TeV at Fermilab's Tevatron Collider. These measurements provide stringent tests on perturbative QCD calculations and are sensitivive to parton distribution functions.
Ugo Giaccari
(Universidade Federal do Rio De Janeiro)
18/07/2013, 09:45
We report recent results of the distribution of the arrival directions of ultra high energy cosmic rays recorded by the surface detector array of the Pierre Auger Observatory.
We discuss the search for large scale anisotropies expressed in terms of dipolar and quadrupolar coefficients as a function of the right ascension and declination at the EeV energy scale.
For cosmic rays at highest...
Claudia Seitz
(Rutgers, State Univ. of New Jersey (US))
18/07/2013, 09:45
The latest results on new physics searches in multijet final states are presented. Searches for new physics with dijets, b-tagged dijets, dijet angular distributions, dijet pairs, and jet triplets are all considered. Also presented will be the search for TeV-scale gravity in two complementary final states: high jet multiplicity final states and the inclusive jet search for extinction.
Aleksey Sibidanov
(Budker Institute of Nuclear Physics (BINP))
18/07/2013, 09:45
Flavour Physics and Fundamental Symmetries
Talk presentation
We present measurements of exclusive and inclusive semileptonic $B_s$ decays using 121 $\rm{fb}^{-1}$ of data collected with the Belle detector near the $\Upsilon(5S)$ resonance. The inclusive branching fraction ${\cal B}(B_s \to X^- \ell^+ \nu_\ell)$ is measured in a sample enhanced in $B_s^{(*)0}\bar{B}_s^{(*)0}$ pair events by reconstructing a tag $D_s^+$ meson. The signal lepton $\ell^+ =...
Klaus Werner
(Univ Nantes)
18/07/2013, 09:48
There is little doubt that flow has been observed in heavy ion collisions at the LHC and RHIC, mainly based on results on azimuthal anisotropies, but also on particle spectra of identified particles,
perfectly compatible with hydrodynamic expansions.
Surprisingly, in pPb collisions one observes a quite similar behavior. So do we observe hydrodynamic dynamics as well in pPb?
We will try to...
Annarita Margiotta
(Universita e INFN (IT))
18/07/2013, 10:00
More than one hundred years after the first observations of cosmic rays, problems connected with their origin and propagation have not been completely solved.
Astrophysical objects such as Supernova Remnants, Active Galactic Nuclei, Quasars and Microquasars, which are likely sources of high energy cosmic rays and gamma rays, could emit high energy neutrinos as well. The detection and the...
Aleksej Koutsman
(TRIUMF (CA))
18/07/2013, 10:00
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 results on inclusive searches for supersymmetric squarks and gluinos in events containing jets, missing transverse momentum with and without light leptons, taus or photons.
Tara Shears
(University of Liverpool (GB))
18/07/2013, 10:00
We report measurements of electroweak boson production in the forward region, using data collected at the LHCb experiment with a centre of mass energy of √s=7 TeV with an integrated luminosity of up to 1.0 fb–1. W and Z bosons are reconstructed in leptonic decay channels, and their cross-sections determined using data-driven techniques. All results are compared to NNLO predictions.
Florian Bernlochner
(Stanford)
18/07/2013, 10:00
Flavour Physics and Fundamental Symmetries
Talk presentation
We report on recent results of studies of semileptonic B
decays with the BaBar detector.
In particular, we discuss the determination of |Vub| and
|Vcb| from both recent exclusive and inclusive measurements.
These include the measurement of the exclusive
B -> pi/eta/eta'/omega l nu decays with tagged and
untagged event reconstruction, the study of the q^2 and lepton
energy...
Antoni Szczurek
(Institute of Nuclear Physics)
18/07/2013, 10:08
We estimate the electromagnetic effect of the spectator charge on
azimuthal anisotropies observed in heavy ion collisions. For peripheral
Pb+Pb reactions at the top energy of the CERN Super Proton Synchrotron,
$\sqrt{s_{NN}}=17.3$ GeV, we predict this effect to bring very large
distortions to the observed directed flow, $v_1$, of positive and
negative pions emitted close to beam...
Dr
Junpei Maeda
(Tokyo Metropolitan University)
18/07/2013, 10:15
A search for events ep-> ep Z0 has been performed in ep collisions
at HERA using the ZEUS detector. The search is based on the entire HERA-I and HERA-II data set, amounting to 0.49 fb-1 of integrated luminosity. The Z0 was searched in the di-jet decay mode with elastic condition defined by etamax < 3, where etamax is defined as the pseudorapidity of the energy deposit in the calorimeter...
Stefan Westerhoff
(University of Wisconsin-Madison)
18/07/2013, 10:15
The High-Altitude Water Cherenkov Gamma-Ray Observatory (HAWC) is currently under construction 4,100 meters above sea level on the slope of Pico de Orizaba, Mexico. HAWC is a large field-of-view instrument capable of continuously monitoring the gamma-ray sky between roughly 50 GeV and 100 TeV. The detector will be used to record both steady and transient gamma-ray sources and to provide an...
Lucy Anne Kogan
(University of Oxford (GB))
18/07/2013, 10:15
Inclusive jet and dijet doubledifferential cross sections have been measured in protonproton collisions using the ATLAS detector. The cross sections were measured using jets clustered with the antikT algorithm. The data are compared to expectations based on nexttoleading order QCD calculations corrected for nonperturbative effects, as well as to nexttoleading order Monte Carlo...
Christian Autermann
(Rheinisch-Westfaelische Tech. Hoch. (DE))
18/07/2013, 10:15
We present a set of generic searches for R-parity conserving SUSY performed by CMS
using the 20 fb-1 collected at sqrt(s)=8 TeV during 2012. Both hadronic and leptonic final states
are considered, with or without tagged bjets. We look for a SUSY signal as an excess on a falling background
distribution in the kinematic planes identified by several sets of variables. The results are...
Riccardo Fantechi
(Sezione di Pisa (IT))
18/07/2013, 10:15
Flavour Physics and Fundamental Symmetries
Talk presentation
A lepton universality test by measurement of the helicity suppressed ratio RK of leptonic decay rates of the charged kaon has been performed by the NA62 experiment.
A precision measurement of the ratio RK of the rates of kaon leptonic decays
K+- to e+- nu and K+- to mu+- nu with the full minimum bias data sample
collected with low intensity 75 GeV/c beam by the NA62 experiment at CERN...
Giovanni Carboni
(Roma 2)
18/07/2013, 11:00
Flavour Physics and Fundamental Symmetries
Talk presentation
The latest years have seen a resurrection of interest in searches for exotic states motivated by tantalising observations by Belle and CDF. Using the data collected at pp collisions at 7 and 8 TeV by the LHCb experiment we present studies of the X(3872) properties as well as preliminary studies and prospects for studies of putative states such as the Z(4430)+.
Peter Christiansen
(Lund University (SE))
18/07/2013, 11:00
\begin{center}
{\large \bf Identified charged pion, kaon, and proton production in pp and Pb-Pb collisions at LHC energies measured with ALICE}
{\bf P.~Christiansen}$^{\rm a}$ for the ALICE Collaboration.
\vspace{12pt}
$^{\rm a}$Department of Physics, Particle Physics, Lund
University,\\
SE-221 00 Lund, Sweden,\\
\textit{peter.christiansen@hep.lu.se}
\vspace{12pt}...
Tibor Kurca
(Universite Claude Bernard-Lyon I (FR))
18/07/2013, 11:00
We present a measurement of the mass of the W boson using the D0 detector and the full Run II dataset. Decays of the W into e \nu are selected and the transverse momentum of the electron, the transverse momentum of the neutrino, the transverse mass of the system, and other new variables are considered in the extraction of the mass.
Sanya Solodkov
(Institute for High Energy Physics (RU))
18/07/2013, 11:00
Several aspects of the jet production in pp collisions have been measured by the ATLAS collaboration. Measurements of multijet systems, including heavy flavour production, with or without a veto on additional jets, probe QCD radiation effects. A measurement of the inclusive multiplicity ratio is sensitive to the strong coupling constant alpha_S and has reduced sensitivity to the uncertainties...
Douglas Michael Schaefer
(University of Pennsylvania (US))
18/07/2013, 11:00
Abstract: A detailed review of the latest results on the main properties of the Higgs boson in the ZZ-?to-?four-?leptons and in the WW to lnulnu channels, with the ATLAS detector using approximately 25 fb-?1 of pp collision data collected at 7 TeV and 8 TeV in 2011 and 2012, is given. The measurements discussed are the mass, couplings, and in the four-?leptons channel through various...
Mr
Henning Kirschenmann
(Hamburg University (DE))
18/07/2013, 11:15
Calibration and reconstruction of jets critically rely on the performance of the calorimeters. Extending from out to $\eta < 5$, jets must critically rely on the interplay between forward calorimeters, central calorimeters and the tracker. The high pileup scenario poses further complications. These difficulties are overcome in CMS using the "particle flow approach". A summary of the...
Niels Tuning
(NIKHEF (NL))
18/07/2013, 11:15
Flavour Physics and Fundamental Symmetries
Talk presentation
Using the large data sample collected by the CERN LHCb experiment, we present studies of Bc mesons. The results include first observations of several new decay modes as well as high precision measurements of its properties.
Tuomas Lappi
(University of Jyvaskyla)
18/07/2013, 11:16
Ultrarelativistic Heavy Ions
This talk reviews theory predictions for charged hadron production in pA collisions at LHC energies. In particular the emphasis is on the difference between models incorporating initial and final state effects on the production of (semi)hard particles.
Alessandro Vicini
(Università degli Studi e INFN Milano (IT))
18/07/2013, 11:20
We will review the present status in MW measurements, discussing the recent progress in the development of the Montecarlo generators used in the extraction of the mass value and commenting the role of the proton PDFs as one important source of systematic uncertainty.
Tiziano Peraro
(Max Planck Institute for Physics - Munich)
18/07/2013, 11:30
I will present a novel approach for reduction of scattering amplitudes, based on multivariate polynomial division.
This technique extends the one-loop integrand reduction yielding the complete integrand decomposition for arbitrary amplitudes,regardless of the number of loops. It allows for the determination of the residue at any multi-particle cut, whose knowledge is a mandatory prerequisite...
Tomoko Iwashita
(Nara Women's Univ.)
18/07/2013, 11:30
Flavour Physics and Fundamental Symmetries
Talk presentation
It has been nearly ten years since the narrow $X(3872)$ state has been discovered in charged $B$ decays by the Belle experiment and its nature still remains unclear. To provide further insight on its properties, we report the search for the $X(3872)$ in the decays $B \to X(3872) K \pi$, $X(3872) \to J/\psi \pi^+ \pi^-$. The analysis is based on full data sample collected at the $\Upsilon(4S)$...
Alain Blondel
(Universite de Geneve (CH))
18/07/2013, 11:35
Top and Electroweak Physics
After the Higgs boson discovery by the LHC experiments at 126 GeV, the Standard Model has no free parameters left and measurements sensitive to Electroweak radiative corrections constitute powerful tests of the existence of weakly interacting New Physics beyond the TeV scale.
TLEP is a high luminosity circular e+e- collider to be fit in a 80-100 km tunnel as precursor and companion of a 100...
Fanfan Jing
(Tsinghua University (CN))
18/07/2013, 11:36
With a unique forward acceptance, and excellent vertexing and particle identification capability, LHCb is well-placed to make important contributions to heavy ion physics through measurements performed using data taken during pA and Ap collisions. The first studies of these data will be presented. These include measurements of particle multiplicity and studies of strange and charmed...
Mauro Donega
(Eidgenoessische Tech. Hochschule Zuerich (CH))
18/07/2013, 11:40
The most recent CMS results on the search for the Standard Model Higgs boson in the two photon channel, using the full dataset recorded at the LHC from pp collisions at centre of mass energies of 7 and 8 TeV, will be presented.
The measured Higgs boson properties, such as the mass and spin, will be discussed.
Peter Loch
(University of Arizona (US))
18/07/2013, 11:45
The internal structure of jets produced at the LHC is important both as a direct test of perturbative QCD and as a tool to identify boosted electroweakscale objects decaying to hadrons. The transverse energy distribution around the jet core has been measured, as well as the fragmentation of a jet into charged particles. Jet shapes, singlejet masses, and jet substructure have the potential to...
Pavel Krokovny
(Budker Institute of Nuclear Physics (RU))
18/07/2013, 11:45
Flavour Physics and Fundamental Symmetries
Talk presentation
We report the results of a study of 352 million $\Upsilon(4S)$ decays in which the final state $\eta \Upsilon(1S)$ is observed. We observe two transitions, $\Upsilon(4S) \to \eta \Upsilon(1S)$ and $\Upsilon(1D) \to \eta \Upsilon(1S)$. The results on a search for $\chi_b (3P)$ spin triplet bottomonium states are presented as well. The data are produced by the KEKB $e^+e^-$ collider and...
Tobias Kasprzik
(KIT, Karlsruhe)
18/07/2013, 11:50
Vector-boson pair production is of great phenomenological importance at the LHC. These processes not only constitute irreducible backgrounds SM Higgs production and various new physics signatures, they may also allow us to study the non-abelian structure of the SM at highest energies and provide the opportunity to search for anomalous couplings. In this talk we review the status of the...
Mr
Jean-Baptiste De Vivie De Regie
(Universite de Paris-Sud 11 (FR))
18/07/2013, 11:55
Abstract: A detailed review of the latest results on the main properties of the Higgs boson in the diphoton channel, with the ATLAS detector using approximately 25 fb-?1 of pp collision data collected at 7 TeV and 8 TeV in 2011 and 2012, is given. The measurements discussed are the mass, couplings, and in the diphoton channel through various production processes.
Krisztian Krajczar
(CERN)
18/07/2013, 11:56
Spectra of inclusive and identified charged hadrons measured in p-Pb collisions at the LHC at sqrt(sNN) = 5 TeV are presented. Charged pions, kaons, and protons in the transverse-momentum range pT = 0.1-1.7 GeV/c and for central rapidities are identified via their energy loss in the CMS silicon tracker. Inclusive charged hadron spectra are studied as a function of pseudorapidity. The fully...
Alexander Schmidt
(University of Hamburg)
18/07/2013, 12:00
Dorota Sokolowska
(University of Warsaw)
18/07/2013, 12:00
We consider a scalar Dark Matter candidate from the Inert Doublet Model in the light of the discovery of the 125 GeV SM-like Higgs boson at LHC.
Using the relic density constraints we explore potential of LHC to determine the properties of the Dark Matter particles independently on the direct and indirect DM detection experiments.
Talk based on arXiv:1303.7102, 1212.4100, 1209.5725 and...
Kai-Feng Chen
(National Taiwan University (TW))
18/07/2013, 12:00
Flavour Physics and Fundamental Symmetries
Talk presentation
The large production cross-sections at LHC energies, combined with a adapted
trigger strategy and good detector resolutions,
has enabled CMS to collect large data samples and to perform
detailed studies of Beauty hadron properties.
In this talk we will report our latest results,
including decay rate measurements from B hadrons, spectroscopy, and the
asymmetries arises from B mixing,...
Dr
Alfredo Urbano
(SISSA)
18/07/2013, 12:10
We analyze the experimental constraints on the parameters of the Higgs effective Lagrangian. We combine the most recent LHC Higgs data in all available search channels with electroweak precision observables from SLC, LEP-1, LEP-2 and the Tevatron.
Roberto Preghenella
(Universita e INFN (IT))
18/07/2013, 12:12
Hadron production has been measured at mid-rapidity by the ALICE experiment at the LHC in proton-lead (p--Pb) collisions at $\sqrt{s_{\rm NN}}$ = 5.02 TeV. The transverse momentum ($p_{\rm T}$) distribution of primary charged particles and of identified light-flavoured hadrons ($\pi^{\pm}$, K$^{\pm}$, K$^{0}_{\rm S}$, p, $\bar{\rm p}$, $\Lambda$, $\bar{\Lambda}$) are presented in this report....
Ben Cooper
(University of London (GB))
18/07/2013, 12:15
The production of heavy flavour in association with a W or Z boson represents an important process to study QCD. High precision is achieved in measurements of differential cross sections and comparisons are made to stateoftheart NLO QCD calculations. Measurement of W+c production cross section has a unique sensitivity to the strangequark density, which is poorly known at low x. W+b...
Pat Scott
(McGill University)
18/07/2013, 12:15
A deal of recent effort has gone into creating generic astroparticle likelihood functions that can be directly included in global fits to Beyond the Standard Model (BSM) theories. I will detail new generalised constraints from the cosmic microwave background on dark matter annihilation into any combination of SM particles, and discuss methods for including event-level data from neutrino...
John Baines
(STFC - Science & Technology Facilities Council (GB))
18/07/2013, 12:15
Flavour Physics and Fundamental Symmetries
Talk presentation
ATLAS has performed searches and accurate measurement of heavy hadrons, with results including the first observation of the chi_b(3P) Bottomonium states and the most accurate measurement of the Lambda_b lifetime. New results in this program are discussed, including searches for excited b-hadrons, and the study of parity violation in the decay Lambda_b into Lambda and J/psi.
Malin Sjodahl
(Lund University)
18/07/2013, 12:15
Both the higher energy and the initial state colored partons contribute to making exact calculations in QCD color space more important at the LHC than at its predecessors. This is applicable whether the method of assessing QCD is fixed order calculation, resummation, or parton showers. In this talk I will discuss tools for tackling the problem of performing exact color summed calculations. I...
Kenneth Richard Herner
(University of Michigan (US))
18/07/2013, 12:25
We present the combination of searches for the Standard Model Higgs boson at a center-of-mass energy of sqrt(s)=1.96 TeV, using the full Run 2 dataset collected with the D0 detector at the Fermilab Tevatron collider. The major contributing processes include associated production (WH or ZH) and gluon fusion (gg->H), in which the Higgs boson further decays to two bottom quarks, two photons or...
Martin Makariev
(Bulgarian Academy of Sciences (BG))
18/07/2013, 12:28
In the framework of a general study of hadron production in elementary and nuclear interactions at the CERN SPS the NA49 experiment has produced new and complete sets of inclusive meson and baryon cross sections in p+p and p+C interactions [1-8]. This work is aimed at providing precision data over most of the available phase space with a special emphasis on completeness, internal consistency...
Michal Vajzer
(Acad. of Sciences of the Czech Rep. (CZ))
18/07/2013, 12:30
Jets are collimated sprays of particles resulting from fragmentation of associated hard scattered partons. They are measured in different types of collisions at different energies to test perturbative Quantum Chromodynamic calculations and are used to study the hard scattering, fragmentation, hadronisation and other properties of partons. These properties studied in simple systems such as...
Manuel Kambeitz
18/07/2013, 12:30
Flavour Physics and Fundamental Symmetries
Talk presentation
We present a measurement of the properties of orbitally excited L=1 B mesons, using 10/fb of data collected by the CDF II detector. The masses, widths and relative production ratio times the branching fraction of the observed decays are determined for the two states B_1$ and B_2^*. The measurement is performed for excited B^0, B^+ and B_s mesons separately.
Isabel Ojalvo
(University of Wisconsin (US))
18/07/2013, 12:30
Production and hadronization of heavy quarks (b and c) in association with the W boson in proton-proton collisions is only partially understood. Experimental measurements are necessary to choose amongst the phenomenological models and parameters. Using the LHC proton-proton collision data collected in 2011 at a centre of mass energy of 7 TeV, we present two studies (1) W+c production, where...
Andrea Quadri
(INFN, Sez. di Milano)
18/07/2013, 12:44
We show that a very powerful Slavnov-Taylor (ST) identity exists
for the Effective Field Theory (EFT) of the Color Glass Condensate (CGC), allowing to control by purely algebraic means the full dependence on the background fields of the ultra-fast gluon modes, as well as the correlators of the quantum fluctuations of the classical gluon source.
We use this formalism to study the change of...
Guey-Lin Lin
(National Chiao-Tung University)
18/07/2013, 12:45
We study the sensitivity of IceCube/DeepCore detector to dark matter (DM) annihilations in the Earth core. We focus on annihilation modes DM DM-->nu anti-nu, tau^+ tau^-, b anti-b, and W^+W^-. Both track and cascade events are considered in our analysis.
By fixing the DM annihilation cross section at some nominal values, we study the sensitivity of IceCube/DeepCore detector to DM...
Louis Helary
(Boston University (US))
18/07/2013, 12:45
The integrated and differential fiducial cross sections for the production of a W or Z boson in
association with a highenergy
photon are measured. Events are selected using leptonic decays
of the W and Z bosons, including the Z->nu nu decay channel. The data are used to test the
electroweak sector of the Standard Model and search for evidence for new phenomena. The
measurements are used...
Liaoyuan Dong
(Institute of High Energy Physics),
liaoyuan dong
(ihep)
18/07/2013, 12:45
Flavour Physics and Fundamental Symmetries
Talk presentation
The BESIII experiment has collected the world's largest samples of J/psi, psi', psi(3770), Y(4260) and Y(4360) decays and is producing a large amount of results in charmonium, light hadron, open charm and XYZ physics. An overview of the most recent results on charmonium decays, D meson decays, light hadron spectroscopy, and searches for XYZ states will be given along with an outlook to the...
Marcin Kucharczyk
(Universita & INFN, Milano-Bicocca (IT))
18/07/2013, 12:45
The LHCb detector is a forward single arm spectrometer designed primarily for the study of CP-violation and other rare phenomena in the decays of beauty and charm particles. LHCb is very powerful in probing New Physics by performing indirect searches. Nevertheless, a program of direct searches for Higgs and Higgs-like particles also exists. Here we present some recent results and perspectives.
Nikolaos Kidonakis
(Kennesaw State University)
18/07/2013, 12:45
I discuss the effectiveness of soft-gluon resummations in desribing higher-order corrections. I present a comparison of recent resummation approaches and their relative successes in approximating complete NNLO corrections. I also discuss fixed-order expansions through NNNLO and present some recent applications to QCD hard-scattering processes.
Adrian Bevan
(University of London (GB))
18/07/2013, 14:30
Flavour Physics and Fundamental Symmetries
Talk presentation
Time-dependent CP asymmetry measurements in D to h^+h^- decays, where h=pi or rho
can be used to constrain the angle beta_c of the cu unitarity triangle up to theoretical
uncertainties. Here we discuss the theoretical uncertainty from penguin contributions
that can be mitigated through the use of isospin analyses. We show that uncertainty from
penguin pollution on a measurement of beta_c...
Alessandro Grelli
(University of Utrecht (NL))
18/07/2013, 14:30
Hadrons containing heavy flavours are unique probes of the properties of the hot and dense QCD medium produced in heavy ion collisions. Due to their large masses, heavy quarks are produced at the initial stage of the collision, almost exclusively via hard partonic scattering processes. Therefore, they are expected to experience the full collision history propagating through and interacting...
Zhiqing Philippe Zhang
(Universite de Paris-Sud 11 (FR))
18/07/2013, 14:30
Inclusive e\pmp single and double differential cross sections for neutral and charged current deep inelastic scattering processes are measured with the H1 detector at HERA. The data were taken at a centre-of-mass energy of \surds = 319GeV with a total integrated luminosity of 333.7 pb-1 shared between two lepton beam charges and two longitudinal lepton polarisation modes. The differential...
Roman Kogler
(Hamburg University (DE))
18/07/2013, 14:30
In many models of physics beyond the Standard Model the coupling of new physics to third generation quarks is enhanced. We present a review of searches for heavy particles beyond the standard model decaying to final states with top and bottom quarks. This includes searches for heavy gauge bosons and excited states.
Several final states originating from the top are considered and the event...
Chia-Ming Kuo
(National Central University (TW))
18/07/2013, 14:30
We present studies of diboson production in pp collisions at 7 TeV and 8 TeV center-of-mass energy based on data recorded by the CMS detector at the LHC in 2011 and 2012. These include precise measurements of W and Z production in association with a photon, as well as diphoton production. The results are interpreted in terms of constraints on anomalous triple gauge couplings.
Amarjit Soni
(BNL)
18/07/2013, 14:45
Flavour Physics and Fundamental Symmetries
Talk presentation
LHCb experiment over a year ago, opened up a new avenue to investigate the phenomena of CP violation via their first observation of direct CP asymmetry in $D^0 \to \pi^+ \pi ^-$ and to $K^+ K^-$.
This observation, though, presents a serious new challenge for theorists, as reliable, quantitative
calculations for D decays to hadronic final states are extremely difficult since the charm...
Jianbei Liu
(Univ. of Science & Tech. of China (CN))
18/07/2013, 14:45
The measurement of the WW diboson production cross section in protonproton
interactions is
reported from the ATLAS experiment. The analysis requires heavy bosons to decay leptonically,
using ee, emu and mumu final states associated with large missing energy. The data are used
to test the electroweak sector of the Standard Model and search for evidence for new phenomena.
The cross section...
Diedi Hu
(Columbia University (US)),
Diedi Hu
(Columbia University (US))
18/07/2013, 14:45
Being the heaviest fermion various extensions of the Standard Model predict new Physics to couple first to the top quark. The talk presents results from searches for new resonances decaying to a top-antitop pair, including the use of boosted top quark reconstruction techniques.
In addition we will review searches for b* resonances decaying to a W boson and a single top quark as well as W',...
Mr
David Tlusty
(NPI ASCR)
18/07/2013, 14:46
In relativistic heavy ion collisions at RHIC, heavy quarks are expected to be created from initial hard scatterings. Their large masses are not easily affected by the strong interaction with QCD medium, thus they carry clean information from the system at early stage. The interaction between heavy quarks and the medium is sensitive to the medium dynamics, therefore heavy quarks are suggested...
Katerina Lipka
(Deutsches Elektronen-Synchrotron (DE))
18/07/2013, 14:47
Measurements of open charm production cross sections in deep-inelastic ep scattering at HERA from the H1 and ZEUS Collaborations are combined. Reduced cross sections sigma_red^{c\bar{c}} for charm production are obtained in the kinematic range of photon virtuality 2.5 < Q2 < 2000 GeV2 and Bjorken scaling variable 0.00003 < x < 0.05. The combination method accounts for the correlations of the...
Advait Neel Nagarkar
(Ohio State University (US))
18/07/2013, 15:00
The measurement of the WZ diboson production cross section in 7 and 8 TeV protonproton
interactions is reported from the ATLAS experiment. The measurement is derived from events in
which bosons decay leptonically with electrons, muons, and missing energy in the final state.
The data are used to test the electroweak sector of the Standard Model and search for evidence
for new phenomena. The...
Ms
Annika Behrens
(University of Zurich)
18/07/2013, 15:00
The XENON100 experiment is a direct dark matter search experiment using a dual-phase xenon time projection chamber situated at the Laborati Nazionali de Gran Sasso (LNGS) underground laboratory. Due to its ultra-low background level it has been able to set the most stringent excluding level for the cross-section of scattering of weakly interacting massive particles (WIMPs) off nucleons.
In...
Devdatta Majumder
(National Taiwan University (TW))
18/07/2013, 15:00
We present searches for massive top and bottom quark partners at CMS using data collected at sqrt(s)=7 and 8 TeV. Such partners can be found in models predicting (vector-like) quarks to solve the Hierarchy problem and stabilize the Higgs mass. The searches span a range of final states, from multi-leptonic to entirely hadronic, and limits are set on mass and production cross sections as a...
Stefan Schacht
(TU Dortmund)
18/07/2013, 15:00
Flavour Physics and Fundamental Symmetries
Talk presentation
We give a comprehensive treatment of SU(3)$_F$ breaking in nonleptonic charm decays without theory bias aiming at a clean interpretation of CP-asymmetries including $\Delta A_{CP}$. We show how reasonable input from QCD factorization sharpens the SU(3)$_F$ fit.
Massimo Corradi
(Universita e INFN (IT))
18/07/2013, 15:04
Charm production in deep inelastic ep scattering was measured with the ZEUS detector using an integrated luminosity of 354 pb-1.
Charm quarks were identified by reconstructing D+ mesons in the D+ -- > K- π+π+ decay channel. Lifetime information was used to reduce combinatorial background substantially. Differential cross sections were measured in the kinematic region 5 < Q2 < 1000 GeV2, 0.02...
Andrea Bocci
(Duke University (US))
18/07/2013, 15:15
The measurement of the ZZ diboson production cross section in 7 and 8 TeV protonproton
interactions is reported from the ATLAS experiment. The measurement is derived using purely
leptonically decaying bosons with electrons, muons, and missing energy in the final state. The
data are used to test the electroweak sector of the Standard Model and search for evidence for
new phenomena. The...
Antonella Succurro
(Universitat Autònoma de Barcelona (ES))
18/07/2013, 15:15
Various extensions of the Standard Model predict the existence
of new types of quarks. We report on several search channels such as
vector-like quarks decaying to a Higgs boson and a top quark or to
a gauge boson and a b quark. Some of the search channels contain decays to top quarks, including the use of boosted top quark reconstruction techniques. These searches use the data sample...
Kristjan Kannike
(Nat. Inst. of Chem.Phys. & Biophys. (EE))
18/07/2013, 15:15
Scalar dark matter models invariant under a discrete Z_3 or Z_4 symmetry are studied. Unlike in the usual Z_2 case, their phenomenology can contain semi-annihilations -- processes in which two dark sector particles scatter into a dark sector and a SM particle. The simplest such model has complex scalar singlet DM stabilised by Z_3. Compared to the well-known Z_2 case, the new processes can...
Carla Gobel Burlamaqui De Mello
(Pontificia Universidade Catolica (BR))
18/07/2013, 15:15
Flavour Physics and Fundamental Symmetries
Talk presentation
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. Preliminary measurements from several decay modes are presented, with complementary time-dependent and time-integrated analyses.
Hendrik van Hees
(Goethe University Frankfurt)
18/07/2013, 15:18
The heavy charm and bottom quarks and the associated open heavy-flavor mesons (D and B) are a valuable probe for the interactions in the hot and dense medium created in heavy-ion collisions. They are produced in the primordial hard collisions of partons within the nuclei and then traverse the hot and dense partonic (QGP) and hadronic (hadron gas) medium, which shows collective behavior,...
Dr
Peter John Bussey
(University of Glasgow (GB))
18/07/2013, 15:21
Isolated-photon+jet production in ep collisions at a centre-of-mass energy of 318 GeV has been measured with the ZEUS detector at HERA using an integrated luminosity of up to 300 pb-1.
Measurements of prompt-photon+jet cross sections are presented as functions of the photon transverse energy and pseudorapidity in a wide range of exchanged-photon virtuality.
In addition, differential...
Byeong Rok Ko
18/07/2013, 15:30
Flavour Physics and Fundamental Symmetries
Talk presentation
We report the measurements of mixing parameter $y_{CP}$, of a CP violating parameter $A_\Gamma$ and of a time integrated CP asymmetries $A_{CP}$ in decays $D^0 \to K^+ K^-$ and $\pi^+\pi^-$ using the Belle final data sample of 976 fb$^{-1}$.
Viviana Cavaliere
(Univ. Illinois at Urbana-Champaign (US))
18/07/2013, 15:30
The study of electroweak boson pair production is a powerful
test of the spontaneously broken gauge symmetry of the Standard Model
(SM) and can be used to search for phenomena beyond the SM. Heavy
particles decaying to gauge boson pairs are predicted by many scenarios
of new physics, including Extra Dimensions, and Technicolor models. We
present generic searches for a heavy particle...
Mr
Theopisti Dafni
(Universidad de Zaragoza (ES))
18/07/2013, 15:30
The status of the solar axion search with the CERN Axion Solar Telescope (CAST) will be discussed. Recent results from the second part of CAST phase II where the magnet bores were filled with 3He gas at variable pressure achieving sensibilities on the axion mass up to 1.2 eV will be presented. In the next two years CAST is expecting to improve sensitivity to solar axions with rest mass below...
Jordi Duarte Campderros
(Universidad de Cantabria (ES))
18/07/2013, 15:30
We present studies of diboson production in pp collisions at 7 TeV and 8 TeV center-of-mass energy based on data recorded by the CMS detector at the LHC in 2011 and 2012. These include precise measurements of WW, WZ, and ZZ production at the LHC. The results are interpreted in terms of constraints on anomalous triple gauge couplings.
Amanda Cooper-Sarkar,
Amanda Sarkar
(University of Oxford (GB))
18/07/2013, 15:38
The Large Hadron Electron Collider (LHeC) is a proposed facility which will exploit the new world of energy and intensity offered by the LHC through collisions with a new 60 GeV electron beam. This contribution summarises the detailed simulation studies on precision QCD topics included in the Conceptual Design Report, plus its relation with the LHC, and the outlook towards a Technical Design...
Chiara Bianchin
(University of Utrecht (NL))
18/07/2013, 15:38
The ALICE experiment at the LHC studies Pb-Pb, pp, and p-Pb collisions with the aim of investigating the properties of the high-density state of strongly-interacting matter, expected to be produced in Pb-Pb collisions.
Heavy quarks are sensitive probes to test the medium transport properties and its degree of thermalization since they are formed at shorter time scale with respect to the...
Manuel Meyer
(University of Hamburg)
18/07/2013, 15:45
Very high energy (VHE) gamma-rays undergo pair production
with low energy photons of background radiation fields.
This leads to an attenuation of the primary gamma-ray flux of extragalactic sources
in the interaction with the extragalactic background light
which stretches from ultraviolet to far-infrared wavelengths.
In the presence of magnetic fields, gamma-rays could oscillate into...
Jonathan Lewis
(Fermilab)
18/07/2013, 15:45
Flavour Physics and Fundamental Symmetries
Talk presentation
The full CDF Run II data set, corresponding to an integrated luminosity of 9.3/fb of proton-antiproton collisions at 1.96 TeV, is used to measure the time-dependent ratio of decay rate for D0 -> K+ pi- to that for D0 -> K-pi+. The ratio is used to determine the mixing parameters R_D, x'^2, and y', and the significance of excluding the no-mixing hypothesis x' = y' = 0.
Sudeshna Banerjee
(Tata Inst. of Fundamental Research (IN))
18/07/2013, 15:45
We present measurements of WW and ZZ production cross sections, and anomalous quartic gauge couplings in p\bar{p} collisions at 1.96 TeV with Run II data from 8.6 fb−1 to 9.9 fb−1 collected by the D0 detector at the Fermilab Tevatron Collider. In the WW cross section measurement, the WW -> ee + MET, WW -> \mu\mu + MET, and WW -> e\mu + MET decay channels are used to measure the total and...
Ruslan Chistov
(Institute for Theoretical and Experimental Physics)
18/07/2013, 16:30
Flavour Physics and Fundamental Symmetries
Talk presentation
We present a measurement of the rate for the doubly Cabibbo-suppressed decay $D^{0} \to K^+\pi^-\pi^+\pi^-$ relative to that for the Cabibbo-favored decay $D^0 \to K^-\pi^+\pi^-\pi^+$. The branching fractions are measured using 801 fb$^{-1}$ of data collected with the Belle detector at the KEKB collider.
Shaouly Bar-Shalom
(Technion, Israel)
18/07/2013, 16:30
I will describe a hybrid framework for electroweak symmetry breaking (EWSB), in which the Higgs mechanism is combined with a Nambu-Jona-Lasinio mechanism. The model introduces an unconstrained (i.e., acts as "fundamental" but not the SM field) scalar and a strongly coupled doublet of heavy quarks with a mass around 500 GeV, which forms a condensate at a compositeness scale \Lambda ~ O(1 TeV)....
Andrey Sapronov
(Joint Inst. for Nuclear Research (RU))
18/07/2013, 16:30
The proton parton distribution functions (PDFs)
are essential for precision physics at the LHC
and other hadron colliders. Their current level
of accuracy dominates the theory uncertainties
in Higgs production and it affects substantially
theory predictions for Beyond Standard Model
high mass production.
The determination of the PDFs is a complex
endeavor involving several physics...
Alexander Philipp Kalweit
(CERN)
18/07/2013, 16:30
The unprecedented high collision energies at the Large Hadron Collider give rise to a significant production of light anti- and hyper-nuclei in proton-proton and, even more, in Pb-Pb collisions. With its excellent particle identification capabilities based on the specific energy loss (dE/dx) in the Time Projection Chamber and time-of-flight measurements, the ALICE experiment is very well...
Melanie Heil
(KIT - Karlsruhe Institute of Technology (DE))
18/07/2013, 16:30
The Alpha Magnetic Spectrometer (AMS-02) is a state of the art particle detector, measuring the cosmic rays on the International Space Station (ISS) since May 19th 2011.
AMS-02 measures all the compounds of cosmic rays up to iron in an energy range from MeV to TeV. The seven subsystems of the detector allow for redundant particle identification with unprecedented accuracy.
With its proton...
Maxime Imbeault
(Cégep de Saint-Laurent)
18/07/2013, 16:45
Flavour Physics and Fundamental Symmetries
Talk presentation
It was recently shown that the weak phase $\gamma$ can be extracted from three-body B decays. Using a flavor-SU(3)-symmetric approach, we extract $\gamma$ from the BaBar measurements of the Dalitz plots of $B \to K\pi\pi$ and $B \to KK\bar K$ decays. We find four possible solutions: $31^{+2}_{-3}$, $77\pm3$, $258^{+4}_{-3}$ and $315^{+3}_{-2}$, in degrees. In all cases the error includes...
Dugan O'Neil
(SFU Simon Fraser University (CA))
18/07/2013, 16:45
Abstract: Since the discovery of a Higgs-?like boson by the ATLAS and CMS experiments at the LHC, the emphasis has shifted towards measurements of its properties and the search for the search in the less sensitive channels in order to determine whether the new particle is the Standard Model (SM) Higgs boson. Of particular importance is the direct observation of the coupling of the Higgs boson...
Maciej Rybczynski
(Jan Kochanowski University (PL))
18/07/2013, 16:46
The exploration of the QCD phase diagram and particularly the search
for a phase transition from hadronic to partonic degrees of freedom and possibly a critical endpoint, is one of the most challenging tasks in present heavy-ion physics.
As observed by the NA49 experiment, several hadronic observables in central Pb+Pb collisions at the CERN SPS show qualitative changes in their energy...
Dr
Voica Ana Maria Radescu
(Deutsches Elektronen-Synchrotron (DE))
18/07/2013, 16:47
Various measurements provided by the ATLAS collaboration have significant impact on parton density functions. Inclusive production of W and Z bosons have been analysed using an NNLO QCD fit and found to constraint the strangequark density at medium and low Bjorkenx. The inclusive jet production at different centreofmass energies, measured by ATLAS are used in an NLO QCD fit and show impact...
Anna Henrichs
(Yale University (US))
18/07/2013, 16:50
Measurements of the top quark production cross sections in proton-proton collisions with the ATLAS detector at the Large Hadron Collider are presented. The measurement require no, one or two electrons or muons in the final state (single lepton, dilepton, hadronic channel).
In addition, the decay modes with tau leptons are tested (channels with tau leptons).
Paolo Gandini
(Syracuse University (US))
18/07/2013, 17:00
Flavour Physics and Fundamental Symmetries
Talk presentation
The angle γ of the CKM unitarity triangle remains the least precisely measured parameter of the CKM mixing matrix. The precision measurement of this parameter is one of the main goals of the LHCb experiment. We present a wide range of measurements of CP violation and partial rates in B→DK decays, as well as the latest LHCb measurement of γ combining all the individual inputs.
Sofia Andringa Dias
(LIP Laboratorio de Instrumentaco e Fisica Experimental de Particulas)
18/07/2013, 17:00
The Pierre Auger Observatory measures cosmic rays with energies between 10^17.5 eV and 10^20 eV, based on air shower sampling at ground, complemented with shower development measurements with a smaller 12% duty-cycle.
The cross-section for the primary interaction of 10^18 eV protons with air has been measured by analysing the maximum of shower development in the atmosphere. This...
Michal Bluj
(CNRS-IN2P3/LLR-Ecole Polytechnique (FR))
18/07/2013, 17:00
The most recent CMS results on the search for a Standard Model Higgs boson in the tau tau channel, using the full dataset recorded
at the LHC from pp collisions at centre of mass energies of 7 and 8 TeV, will be presented.
Various tau decay channels are explored as well as several Higgs production channels
Michal Sumbera
(Acad. of Sciences of the Czech Rep. (CZ))
18/07/2013, 17:02
Results from the Beam Energy Scan (BES) program conducted recently by STAR
experiment at RHIC are presented. The data from Phase-I of the BES program
collected in Au+Au collisions at center-of-mass energies (\sqrt{s_{NN}})
of 7.7, 11.5, 19.6, 27, and 39 GeV cover a wide range of baryon chemical
potential \mu_B (100-400 MeV) in the QCD phase diagram. Several STAR
results from the BES...
Charlotte Van Hulse,
charlotte Van Hulse
18/07/2013, 17:04
HERMES had taken a wealth of deep-inelastic scattering (DIS) data using the 27.6 GeV polarized lepton beam at HERA and various pure gas targets, both unpolarized and polarized, which opened the door to several unique results. Among them are the first evidences for the naive-T-odd Sivers and Collins effects but also the recent first measurements of azimuthal modulations in the unpolarized...
Michael Maes
(Vrije Universiteit Brussel (VUB) - Interuniversitary Institute for high energies (IIHE))
18/07/2013, 17:10
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...
Kentaro Negishi
(Tohoku Univ.)
18/07/2013, 17:15
Flavour Physics and Fundamental Symmetries
Talk presentation
The neutral $B$-meson decay, $B^0\to D^*\pi$, provides a sensitivity to $\sin(2\phi_1+\phi_3)$, where $\phi_1$ and $\phi_3$ are the angles of the unitary triangle. There are two ways that the initial $B^0$ goes to a final state $D^{*-}\pi^+$. One is a Cabbibo-favoured decay (CFD) and the other is via $B^0 \to \bar{B}^0$ mixing followed by a doubly-Cabbibo-suppressed decay (DCSD). The former...
Michele De Gruttola
(University of Florida (US))
18/07/2013, 17:15
The most recent CMS results on the search for a Higgs boson in the bb channel, produced in association with a Z or W boson, or in vector-fusion mode, using the full dataset recorded at the LHC from pp collisions at centre of mass energies of 7 and 8 TeV, will be presented.
Prof.
Hugo Reinhardt
(Tuebingen University)
18/07/2013, 17:18
The effective potential of the order parameter for confinement is calculated for SU(N) Yang-Mills theory in the Hamiltonian approach. Compactifying one spatial dimension and using a background gauge fixing, this potential is obtained within a variational approach by minimizing the energy density for given background field. Thereby, the inverse length of the compactified dimension represents...
Elena Zemlyanichkina
(Joint Inst. for Nuclear Research (RU))
18/07/2013, 17:26
New results of the double spin asymmetry A1p and the spin-dependent structure function of the proton g1p as a function of $x_{Bj}$ and $Q^2$ will be presented. New COMPASS data on longitudinal polarized NH$_3$ target were collected during the year 2011 with beam of positive muons with energy E = 200 GeV}. It allows us to cover low $x$ region down to 0.025 in the range...
fedor ignatov
18/07/2013, 17:30
Flavour Physics and Fundamental Symmetries
Talk presentation
Regular data taking with the CMD-3 and SND detectors at the VEPP-2000 electron-positron collider in Novosibirsk is underway since 2010. The luminosity up to 10**31 cm-2s-1 has been reached at the energy 2E=2 GeV, and another order of magnitude will be achieved after construction of the new positron source.
The already collected physical data sample corresponds to about 36 inversed picobarns...
Alessia Tricomi
(Universita e INFN (IT))
18/07/2013, 17:30
The LHCf experiment has been installed at +/- 140 m from the Atlas LHC interaction region, to precisely measure the
neutral particle energy spectra (mainly photons, neutral pions and neutrons) produced very forward in the LHC collisions.
The experiment has successfully taken data both in p-p collisions (at 900 GeV, 2.76 TeV, and 7 TeV center of mass energy)
and in the p-Pb collisions at...
David Lopez Mateos
(Harvard University (US))
18/07/2013, 17:30
Abstract: Since the discovery of a Higgs-?like boson by the ATLAS and CMS experiments at the LHC, the emphasis has shifted towards measurements of its properties and the search for the search in the less sensitive channels in order to determine whether the new particle is the Standard Model (SM) Higgs boson. Of particular importance is the direct observation of the coupling of the Higgs boson...
Dr
Enrico Fragiacomo
(INFN Trieste (IT))
18/07/2013, 17:38
Hadronic resonance production in pp and Pb-Pb collisions at LHC with the ALICE experiment
Enrico Fragiacomo
INFN Trieste
on behalf of the ALICE Collaboration
Abstract
Resonances, with their lifetime comparable to the lifetime of the partonic plasma phase, are a valuable tool to study the dynamics of the high energy density medium formed in heavy-ion collisions. Resonance...
Nour Makke
(Universita e INFN (IT))
18/07/2013, 17:43
The transversity parton distribution remains a poorly known cornerstone in the nucleon spin structure. While the Collins effect in spin asymmetries in Semi-Inclusive DIS (SIDIS) is one crucial tool to address the transversity function, the most promising alternative is the azimuthal asymmetry in SIDIS when a hadron pair is detected in the final state. In this case, the chiral-odd transversity...
Fabrizio Caola
(Johns Hopkins University)
18/07/2013, 17:45
I will present new results for the
fully differential Higgs plus jet cross
section at NNLO in perturbative QCD.
I will review some technical details
of the computation, and discuss its
impact for Higgs analyses at the LHC.
Andreas Haungs
(Karlsruhe Institute of Technology)
18/07/2013, 17:45
With KASCADE-Grande, the detection of high-energy cosmic rays above a few hundred TeV is realized by the observation of extensive air-showers. By using a multi-detector setup, energy spectrum, elemental composition, and anisotropies of high-energy cosmic rays in the energy range from below the knee up to 2 EeV are investigated. In addition, the large high-quality data set permits distinct...
Dr
Rikard Sandstrom
(Max-Planck-Institut fuer Physik (Werner-Heisenberg-Institut) (D)
18/07/2013, 17:54
During the first three years of operation the ATLAS experiment has collected an integrated luminosity of 0.15 nb-1 for sqrt(s_NN)=2.76 TeV lead-lead collisions,
30 nb-1 for 5.02 TeV proton-lead collisions, and 5 pb-1 for sqrt(s)=2.76 TeV proton-proton collisions. The proton-lead and the high-statistics 2.76 TeV proton-proton data recorded during the highly successful 2013 LHC heavy ion run...
Dr
Paolo Camarri
(University of Roma "Tor Vergata")
18/07/2013, 18:00
The ARGO-YBJ experiment, located in the Tibet region of China at 4300 meters a.s.l., has run uninterruptedly for over 5 years, namely from November 2007 till the beginning of 2013. It was designed to study astronomical gamma-ray sources in the energy range from a few hundred GeV up to about 100 TeV, and cosmic-ray physics in the energy range from about 1 TeV up to few PeV. The full-coverage...
Fabrizio Margaroli
(Universita e INFN, Roma I (IT))
18/07/2013, 18:00
The most recent CMS results on the search for a Higgs boson produced in association with a top quark, using the full dataset recorded at the LHC from pp collisions at centre of mass energies of 7 and 8 TeV, will be presented.
The Higgs decays studied cover all major decays channels, such as bb, gamma gamma, ZZ, WW, tau tau.
Adrian Carmona
(ETH Zurich)
19/07/2013, 09:00
In this talk, I will describe the effects of extended fermion sectors, respecting custodial symmetry, on Higgs production and decay. The resulting protection for the Z->b_L b_L and Z->\tau_R\tau_R decays allows for potentially interesting signals in Higgs physics, while maintaining the good agreement of the Standard Model with precision tests. The setups can be motivated as the low energy...
Nikolaos Kidonakis
(Kennesaw State University)
19/07/2013, 09:00
I present higher-order results, based on NNLL resummation, for differential transverse momentum and rapidity distributions in processes involving top quarks. In particular results are presented for top-pair production and for single-top production in all three channels,
Allen Caldwell
(Max Planck Institute),
Allen Christopher Caldwell
(Max-Planck-Institut fuer Physik (Werner-Heisenberg-Institut) (D)
19/07/2013, 09:00
The cross sections for neutral current deep inelastic scattering in
e+p collisions with a longitudinally polarised positron beam have been measured using the ZEUS detector at HERA. The single-differential cross-sections dsigma/dQ2, dsigma/dx and dsigma/dy and the double-differential cross sections in Q2 and x are measured in the kinematic region Q2 > 185 GeV2 for both positively and...
Karsten Danzmann
(AEI , Hannover)
19/07/2013, 09:00
More than 90 years ago, Einstein predicted the existence of Gravitational Waves as a consequence of his theory of General Relativity. They are minute distortions of space and time, created by rapidly accelerating large masses, and propagating at the speed of light. Several kilometer-size laser-interferometric gravitational wave detectors are currently operating on the earth. They will soon be...
Massimiliano Marchisone
(Universita e INFN (IT))
19/07/2013, 09:00
Ultra-relativistic heavy ion collisions produce strongly interacting matter at high temperature and energy density.
Under such extreme conditions a deconfined partonic phase called Quark-Gluon Plasma (QGP) is formed.
The measurement of quarkonia (charmonia and bottomonia) is expected to provide essential information on the QGP properties.
In pp collisions high precision data serve as...
Alejandro Celis
(IFIC CSIC-Universitat de Valencia)
19/07/2013, 09:00
Flavour Physics and Fundamental Symmetries
Talk presentation
In this talk I will discuss the recent status of B to D(*) tau nu decays in the context of two-Higgs-doublet models. The BaBar collaboration has reported an excess in semileptonic b -> c tau nu transitions that has gathered recent interest as a possible signature of new physics. I will discuss the sensitivity of this decays to charged Higgs boson contributions, taking into account the...
Michael Duehrssen-Debling
(CERN)
19/07/2013, 09:15
Abstract: The combined measurements of the properties of the recently discovered Higgs boson in individual channels using the ATLAS detector and up to 25 fb -?1 of 7 TeV and 8 TeV pp collision data collected in 2011 and 2012, are discussed.
Andreas Crivellin
(University Bern)
19/07/2013, 09:15
Flavour Physics and Fundamental Symmetries
Talk presentation
In this talk we show the effects of adding a second Higgs doublet to the SM particle content on flavour observables. After updating the constraints of the 2HDM of type II (which respects natural flavour conservation) we constrain the flavour structure of the 2HDM of type III (with general Yukawa coupling) from FCNC processes. Interestingly, respecting these constraints, sizable effects in...
Philip Hugh Symonds
(Brunel University (GB))
19/07/2013, 09:15
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...
Allen Caldwell
(Max Planck Institute),
Allen Christopher Caldwell
(Max-Planck-Institut fuer Physik (Werner-Heisenberg-Institut) (D)
19/07/2013, 09:15
New measurements of the differential cross sections for neutral
current deep inelastic ep collisions up to Bjorken-x values equal to
one are presented. The measurements were performed using the data
collected with the ZEUS detector at HERA with sqrt(s) = 318 GeV and an
integrated luminosities of 142(187) pb-1 for e+p(e-p) collisions.
A new method was employed to reconstruct the kinematic...
Prof.
Yosuke Yusa
(Niigata University)
19/07/2013, 09:15
We will present overview of Aerogel Ring Imaging CHerenkov counter (ARICH) which is developed as a particle identification detector in next generationB-factory experiment, the Belle II. The ARICH consists of aerogel radiator and photo sensor. When charged particle goes through the radiator, it emits Cherenkov light to the direction which depends on the particle mass. Using this dependance, we...
Francois Arleo
(LAPTH, Annecy-le-Vieux)
19/07/2013, 09:16
The effects of parton energy loss in cold nuclear matter on heavy-quarkonium suppression in p-A collisions are studied. It is shown from first principles that at large quarkonium energy E and small production angle in the nucleus rest frame, the medium-induced energy loss scales as E. Using this result, a phenomenological model depending on a single free parameter is able to reproduce J/psi...
Mr
Andrey Tayduganov
(ITEP Institute for Theoretical and Experimental Physics (RU))
19/07/2013, 09:30
Flavour Physics and Fundamental Symmetries
Talk presentation
We discuss the possibilities for observing the new physics effects at low energies through a detailed analysis of the angular distribution of the decay products. In particular we find new observables that are accessible experimentally and that can be very useful in searches for the effects of physics beyond the Standard Model at low energies. We show the potential of this research on a...
Josh Bendavid
(CERN)
19/07/2013, 09:30
Combining all Higgs analysis results, the properties of the new particle at about 125 GeV are examined. The mass, spin and couplings are studied. These results are based on the full data sample of the first run of the LHC collider with data collected by the CMS experiment.
Ford Garberson
(Yale University (US))
19/07/2013, 09:35
Measurements of the top quark production cross sections in proton proton
collisions with the
ATLAS detector at the Large Hadron Collider are presented. The measurement require no, one
or two electrons or muons in the final state (single lepton, dilepton, hadronic channel).
In addition, the decay modes with tau leptons are tested (channels with tau leptons). The main
focus are measurements...
Joakim Nystrand
(University of Bergen (NO))
19/07/2013, 09:36
The strong electromagnetic fields surrounding the Pb-ions accelerated
at the CERN Large Hadron Collider (LHC) allow two-photon and
photonuclear interactions to be studied in a new kinematic regime.
These interactions can be studied in ultra-peripheral collisions,
where the impact parameters are larger than the sum of the nuclear
radii and hadronic interactions are suppressed.
During...
Sanmay Ganguly
(Tata Inst. of Fundamental Research (IN))
19/07/2013, 09:40
We present CMS results related to jet production cross sections, which pose a central test to perturbative QCD predictions. Results include recent jet, dijet, and multijet differential cross section measurements performed with 2011 data taken at center-of-mass energy of 7 TeV and 2012 data taken at 8 TeV.
Stefano Vitale
(University of Trento)
19/07/2013, 09:45
LISA Pathfinder is a mission of the European Space Mission aimed at
demonstrating the space-time metrology required for space-borne
gravitational wave observatories like eLISA. In particular the mission aims
at experimentally test the detailed physical model of the eLISA instrument
using the hardware, which is going to be flown on eLISA. This model predicts
that no true forces on...
Yanyan Gao
(Fermi National Accelerator Lab. (US))
19/07/2013, 09:45
The discovery of the new boson with the mass around 125 GeV at the LHC opens a way for experimental studies of its properties such as spin, parity, and couplings to the Standard Model particles. We present the methods for identifying and measuring various types of tensor couplings that are consistent with assumed symmetries and Lorentz invariance for a given spin assignment. New developments...
Jan Hasenbusch
(Univ. of Bonn)
19/07/2013, 09:45
Flavour Physics and Fundamental Symmetries
Talk presentation
We report the first branching fraction measurement of the inclusive Cabibbo favoured semileptonic decay $B\to X_c \tau\nu$ by the Belle experiment. The branching fraction of this kinematically suppressed mode is highly sensitive to new physics beyond the Standard Model, such as a charged Higgs, which couples strongly to the massive $\tau$ lepton and interfere with the Standard Model process....
Francesca Cavallari
(Universita e INFN, Roma I (IT))
19/07/2013, 09:45
The Electromagnetic Calorimeter (ECAL) of the Compact Muon Solenoid (CMS) experiment at the LHC is a hermetic, fine grained, homogeneous calorimeter, comprising 75,848 lead tungstate scintillating crystals, located inside the CMS superconducting solenoidal magnet. It was designed to operate for a minimum of ten years at the LHC, with an instantaneous luminosity of 2x10^34/cm^2/s and for an...
Max Klein
(University of Liverpool (GB))
19/07/2013, 09:52
The Large Hadron Electron Collider (LHeC) is a proposed facility which will exploit the LHC heavy ion beam for electron-nucleus scattering, using a new 60 GeV electron accelerator. The kinematic coverage extends beyond previous deep inelastic lepton-ion experiments by nearly four orders of magnitude at low Bjorken-x and towards higher Q^2. This contribution summarises the content of the...
Maria Veronica Sorin
(Universitat Autònoma de Barcelona (ES))
19/07/2013, 09:55
We present the most recent measurements by the CDF and D0 Collaborations of inclusive and differential top quark pair cross sections in proton-antiproton collisions at sqrt(s)=1.96 TeV at Fermilab's Tevatron Collider . The measured spectra, binned in several observables, are compared to those obtained from the Monte Carlo simulation and QCD at approximate NNLO.
Giovanni Ossola
(City University of New York (US))
19/07/2013, 09:55
After reviewing the main features of the GoSam framework for automated one-loop calculations, we will show a selection recent phenomenological results obtained with it. In particular, we will present results for NLO QCD corrections to the production of Higgs boson in conjunction with jets at the LHC.
Eli Ben Haim
(Centre National de la Recherche Scientifique (FR))
19/07/2013, 10:00
Flavour Physics and Fundamental Symmetries
Talk presentation
We present the measurement of the B -> D(*) tau nu decay,
which is sensitive at tree level to New Physics in the form
of a charged Higgs Boson.
The measured branching fraction is 3.4 sigma larger than
the SM predictions, and excludes the 2HDM of type 2 at 99.88%
confidence for all tan(beta)/mHiggs values. Additional studies of
the momentum transferred to the lepton system show...
Richard wigmans
(Texas Tech)
19/07/2013, 10:00
Simultaneous detection of the Cherenkov light and
scintillation light produced in hadron showers makes it possible to measure the electromagnetic shower fraction event by event and thus eliminate the detrimental effects of fluctuations in this fraction on the performance of hadron calorimeters.
In the RD52 (DREAM) project, the possibilities of this dual-readout calorimetry are investigated...
Joana Machado Miguens
(LIP Laboratorio de Instrumentacao e Fisica Experimental de Part)
19/07/2013, 10:00
The latest results from ATLAS on the search for SM-like Higgs bosons
with masses substantially above the observed 125 GeV Higgs boson
are presented. Extending previous results, these include ZZ and WW decay modes, and masses from 200 GeV to 1TeV are explored.
Ermias Atomssa
(Stony Brook University)
19/07/2013, 10:12
As the study of the hot and dense medium created in ultra-relativistic heavy ion collisions advances from an exploratory phase to a more quantitative and detailed approach, the PHENIX experiment is exploiting the unique opportunities offered by the versatility of the Relativistic Heavy Ion Collider. Measurements from d+Au collisions are providing crucial new information about the cold nuclear...
Maximilien Chefdeville
(LAPP, Annecy)
19/07/2013, 10:15
The design of calorimeter systems for a detector at a future Linear Collider
(ILC, CLIC) is largely driven by the requirements of jet reconstruction. The
particle flow technique has been shown to be capable of achieving an energy
resolution ~30%/sqrtE, permitting the discrimination of W and Z bosons in their
hadronic decays. Such performance requires the separation of neutral...
Fulvia De Fazio
(INFN - Sezione di Bari)
19/07/2013, 10:15
Flavour Physics and Fundamental Symmetries
Talk presentation
I will discuss a variant of the 331 model,a new Physics scenario in
which the gauge group of the SM is extended to SU(3)_C X SU(3)_L X U(1)_X.
As a main consequence, new sources of flavour and CP violation are
present that originate dominantly through the flavour violating
interactions of ordinary quarks
and leptons with a new heavy Zprime gauge boson.
I will focus on correlations...
Zoltan Laszlo Trocsanyi
(University of Debrecen (HU))
19/07/2013, 10:15
We simulate the hadroproduction of a t tbar pair in association with a
b bbar pair at the LHC using the PowHel program. The generated events
are stored according to the Les-Houches event format. We interface
those events to the PYTHIA shower Monte Carlo program, allowing for
decays of massive particles, showering and hadronization, thus leading
to predictions for differential...
Juan Jose Sanz-Cillero
(Universidad Autonoma de Madrid)
19/07/2013, 10:20
We present a one-loop calculation of the oblique S and T
parameters within strongly-coupled models of EW symmetry breaking
with a Higgs-like boson and analyze the phenomenological implications.
Using dispersive representations free of unphysical cut-offs, we obtain S and T at
the one-loop level in terms of a few resonance parameters.
On the contrary to a widely spread believe, we...
Jonathan Hollar
(Lawrence Livermore National Laboratory),
Jonathan Jason Hollar
(Universite Catholique de Louvain (BE))
19/07/2013, 11:00
We present studies of exclusive WW production via photon-photon exchange, using data collected by the CMS detector at a center of mass energy of 7 TeV. The results are interpreted in terms of limits on anomalous quartic gauge couplings.
Chiara Caprini
(CEA-Saclay)
19/07/2013, 11:00
A first order phase transition in the early universe acts as a source of gravitational waves. The gravitational waves are produced by the collision of the broken phase bubbles and by the magnetohydrodynamic turbulence in the primordial plasma stirred by the bubble collision. It will be shown how the shape and amplitude of the gravitational wave spectrum can be predicted by general arguments...
Chun-Khiang Chua
19/07/2013, 11:00
Flavour Physics and Fundamental Symmetries
Talk presentation
We study the implications of the experimental results on the \mu -> e\gamma decay rate and the muon anomalous magnetic moment, on muonic lepton flavor violating processes, such as \mu -> 3 e and \mu N -> e N. We use a model independent approach in this analysis, where these processes are considered to be loop induced by exchanging spin 1/2 and spin 0 particles. We explore two complementary...
Tamsin Nooney
(University of London (GB))
19/07/2013, 11:00
The Arachnid collaboration has been set up in the UK to develop CMOS
Monolithic Active Pixel Sensors. The first device of this collaboration
is named Cherwell. The Cherwell device consists of several arrays of
pixels optimised either for vertexing or for calorimetry. For the former,
two subarrays were designed. The first one has 96x48 pixels on a 25 um pitch.
Each pixel consists of a...
José Eliel Camargo Molina
(W)
19/07/2013, 11:00
The existence of multiple non-equivalent minima of the scalar potential in SUSY models both raises technical challenges and introduces interesting physics. The technical challenges are now that one has to find several minima and evaluate which is the deepest, as well as calculate the tunneling time from a false vacuum to the true vacuum.
In this talk I will present studies of the vacuum...
Liliana Apolinario
(Universidade de Santiago de Compostela (ES))
19/07/2013, 11:00
Motivated by the new experimental capabilities of the LHC and the new results from heavy-ion experiments, several extensions of the standard calculations of energy loss have been made recently. In this presentation, I will provide a short overview of recent developments in jet quenching theory. First, I will discuss some improvements computed by different groups to implement energy-momentum...
Fabrizio Cei
(U)
19/07/2013, 11:15
Flavour Physics and Fundamental Symmetries
Talk presentation
We present recent results of the MEG experiment, which has been
searching for the Lepton Flavour Violating decay mu->e gamma since
several years. In a combined dataset corresponding to 3.6 x 10**14
stopped muons on target we didn't find any evidence for this decay
and we established an upper bound on the mu->e gamma branching ratio
of 5.7 x 10**(-13) at 90% C.L., which improves our...
Mark Stockton
(McGill University (CA))
19/07/2013, 11:15
Isolated prompt photons provide a direct probe of shortdistance physics, complementary to that provided by measurements of jets or vectorbosons. The data are sensitive to the gluon density of the proton. The inclusive prompt photon cross sections have been measured over a wide range of transverse momenta; the diphoton cross section has also been measured as a function of diphoton mass, total...
Sergio Gonzalez Sevilla
(Universite de Geneve (CH))
19/07/2013, 11:15
State-of-the-art particle physics detectors at colliders contain a pixel detector as heart of their particle tracker to cope with the large density of particle tracks near the interaction point. For radiation damage reasons, mostly hybrid detectors were used which comprise a silicon pixel sensor fabricated on high-resistivity FZ silicon and a bump-bonded readout chip in deep sub-micron...
Altan Cakir
(Deutsches Elektronen-Synchrotron (DE))
19/07/2013, 11:15
In this talk, the latest results from CMS on RP violating Supersymmetry are reviewed. We present results using up to 20/fb of data from the 8 TeV LHC run of 2012. Interpretations of the experimental results in terms of production of squarks, gluinos, charginos, neutralinos, and sleptons within RP violating susy models are presented.
Rudiger Haake
(Westfaelische Wilhelms-Universitaet Muenster (DE))
19/07/2013, 11:20
Rüdiger Haake, Westfälische Wilhelms-Universität Münster, Germany
on behalf of the ALICE collaboration
Highly energetic jets are sensitive probes for the kinematics and the topology of high energy collisions. They are produced in an early stage of the collision from hard scattered partons that hadronize and eventually form jets as a spray of charged and neutral particles.
The measurement...
Gabriele Compostella
(Max-Planck-Institut fuer Physik (Werner-Heisenberg-Institut) (D)
19/07/2013, 11:20
Measurements of the top quark mass in proton-proton collisions with the ATLAS detector at the Large Hadron Collider are presented. They are performed in various channels: single lepton, dilepton and all-hadronic final states. The most precise measurement is obtained in the single lepton channel using a 3-dimensional template technique which determines the top quark mass together with a global...
Dr
Carlos Marinas
(University of Bonn)
19/07/2013, 11:30
The DEPFET Collaboration develops highly granular, ultra-thin pixel detectors for outstanding vertex reconstruction at future collider experiments. A DEPFET sensor, by the integration of a field effect transistor on a fully depleted silicon bulk, provides simultaneously position sensitive detector capabilities and in-pixel amplification. The characterization of the latest DEPFET prototypes has...
Pedro Vieira De Castro Ferreira Da Silva
(CERN)
19/07/2013, 11:30
Wolfgang Ehrenfeld
(Universitaet Bonn (DE))
19/07/2013, 11:30
An extended QCD sector beyond the minimal supersymmetric standard model or the admission of R-parity violation introduces new signatures to the search for supersymmetry at the LHC. Strongly interacting resonances may decay to jets, sleptons may decay via lepton-flavour violating processes and lightest supersymmetric particles may decay into many leptons with or without missing transverse...
Yusuke Uchiyama
(The University of Tokyo)
19/07/2013, 11:30
Flavour Physics and Fundamental Symmetries
Talk presentation
We present the upgrade program of MEG experiment to search for the lepton-flavor-violating decay, mu to e gamma, aiming for a sensitivity enhancement of one order of magnitude compared to the final MEG result. The key feature of this program is to increase the rate capability of all detectors to enable running at more than twice higher beam intensity, which is the intensity frontier of DC muon...
Dr
Hartmut Stadie
(Hamburg University (DE))
19/07/2013, 11:40
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.
Isabelle Ripp-Baudot
(IPHC Strasbourg, CNRS/IN2P3)
19/07/2013, 11:45
The physics goals of a growing number of subatomic physics experiments assume vertexing and tracking performances calling for a specific pixel technology, which offers a high data rate capability as well as precision, low power and cost standards departing from those of the most widely used devices. CMOS Pixel Sensors (CPS), and the ultra-light systems they equip, address this...
Yevgeny Kats
(Rutgers University)
19/07/2013, 11:45
We confront a diverse set of simplified models from the R-parity violating MSSM with the ATLAS and CMS new physics searches. We identify weakly constrained final states and discuss ideas for analysis techniques that would be able to address some of them.
Prof.
Roger Barlow
(MANCHESTER UNIVERSITY)
19/07/2013, 11:45
Flavour Physics and Fundamental Symmetries
Talk presentation
We present a set of preliminary and final results on tau branching
fractions and invariant mass spectra, and a search for the second
class current decay tau -> pi eta'(958) nu_tau.
The results include new studies of a large number 3 and 5-prong
tau decay modes either inclusive or classified according the
hadronic resonance content (K0S, eta, omega, etc.).
All results are based on the...
Peter Levai
(Hungarian Academy of Sciences (HU))
19/07/2013, 11:52
Hadron production in relativistic heavy ion collisions usually consists of two main channels in the intermediate-pT region at RHIC and LHC energies: parton coalescence/recombination and jet fragmentation. We have explored a new channel, namely hadron production from strong time dependent coherent field produced in heavy ion collisions. One can investigate direct hadron production from strong...
Alessandro Tricoli
(CERN)
19/07/2013, 11:55
The production of jets in association with a W or Z boson in protonproton collisions at 7 TeV represent an important process to study QCD in a multiscale environment. The cross sections, differential in several kinematics variables, have been measured up to high jet multiplicities and compared to new higherorder QCD calculations. The ratio of (Z + a single jet)/(W + a single jet) can...
Zdenek Dolezal
(Charles University (CZ))
19/07/2013, 12:00
Flavour Physics and Fundamental Symmetries
Talk presentation
B factories have successfully confirmed that the Standard Model with the CKM matrix offers a correct description of the quark weak
transitions and of CP violation. The next generation B factory (the so called super B factory) will search for New Physics effects
by looking for departures from the Standard Model predictions in precision measurements. For such studies, a 50 times larger data...
Dmitry Hits
(Eidgenoessische Tech. Hochschule Zuerich (CH))
19/07/2013, 12:00
With the first three years of the LHC running complete, ATLAS and CMS are planning to upgrade their innermost tracking layers with more radiation hard technologies. Chemical Vapor Deposition (CVD) diamond is one such technology. CVD diamond has been used extensively in beam condition monitors as the innermost detectors in the highest radiation areas of BaBar, Belle, CDF and all LHC...
Reinhild Peters
(Georg-August-Universitaet Goettingen (DE))
19/07/2013, 12:00
The top quark is the heaviest known elementary particle and its mass is a free parameter of the Standard Model. We present the most recent measurement of the top quark mass by the D0 collaboration at the Tevatron proton-antiproton collider in lepton-plus-jet and dilepton channels.
Massimo Corradi
(Universita e INFN (IT))
19/07/2013, 12:00
The discovery of a Higgs particle at the LHC makes it even more interesting to look for extensions of the SM in which a Higgs particle is decaying to a hidden sector particle. These searches require good understanding of the detector as they look for vertices far away from the interaction point.
We report on searches for highly displaced jets using data recorded in 2012 at sqrt(s)=8 TeV...
Bjoern Penning
(University of Chicago (US))
19/07/2013, 12:05
Associated production of a W/Z bosons with jets are studied as a function of various kinematic observables. We present measurements of the ratios of cross sections, $\sigma(p\bar{p}\to Z+b~\text{jet})$/$\sigma(p\bar{p}\to Z+\text{jet})$, $\sigma(p\bar{p}\to Z+c~\text{jet})$/$\sigma(p\bar{p}\to Z+\text{jet})$ and $\sigma(p\bar{p}\to Z+c~\text{jet})$/$\sigma(p\bar{p}\to Z+b~\text{jet})$,...
Matthew Nguyen
(Ecole Polytechnique (FR))
19/07/2013, 12:12
Jets are an important tool to probe the medium produced in ultra-relativistic heavy ion collisions. In PbPb collisions a significant energy loss (jet quenching) of the partons traversing the hot and dense medium has been observed and quantified through a variety of measurements: dijet momentum imbalance, photon-jet correlations, measurements of the fragmentation pattern and the jet shapes,...
Andrzej Buras
(TU-Munich)
19/07/2013, 12:15
Flavour Physics and Fundamental Symmetries
Talk presentation
I will review detailed analyses of flavour violation in a number of
extensions of the Standard Model performed in 2012 and 2013.
In addition to various model independent patterns of flavour violation originating in tree-level FCNCs mediated by Z', Z and heavy scalars I will present the results in a Minimal Theory for fermion masses. Particular emphasis will be put on correlations ...
Bjoern Penning
(University of Chicago (US))
19/07/2013, 12:15
We present measurements of the differential cross section dsigma/dpT_gamma for the inclusive production of a photon in association with a b/c-quark jet. The results are based on data corresponding to an integrated luminosity of 8.7 fb^-1, recorded with the D0 detector at the Fermilab Tevatron ppbar collider at sqrt(s)=1.96 TeV. The measured cross sections are compared with next-to-leading...
Loic Quertenmont
(Universite Catholique de Louvain (BE))
19/07/2013, 12:15
The latest results on long-lived particles at CMS are presented. Searches include the search for displaced jets, multiply charged particles, fractionally charged particles, and R hadrons.
Stijn Blyweert
(Vrije Universiteit Brussel (BE))
19/07/2013, 12:20
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...
Matthias Artur Weber
(Univ. of California Los Angeles (US))
19/07/2013, 12:25
The associated production of jets and vector bosons allows for stringent tests of perturbative QCD calculations and is sensitive to the possible presence of new physics beyond the Standard Model. Measurements of jet production rates in association with W, Z or photons, in proton-proton collisions at 7 TeV and 8 TeV center-of-mass energy are presented, using data collected with the CMS...
Ewelina Maria Lobodzinska
(Deutsches Elektronen-Synchrotron (DE))
19/07/2013, 12:28
ATLAS presents the first result of the measurement of the jets and electroweak bosons in proton-lead collisions at sqrt(s_NN)=5.02 TeV. The data was obtained during the LHC 2013 proton-lead with integrated luminosity of approximately 30nb-1. Forward jet production in proton-lead collisions is expected to be sensitive to saturation of parton distribution in the lead nucleus. ATLAS measurements...
Roman Nevzorov
(ITEP), Dr
Roman Nevzorov
(University of Glasgow),
Roman Nevzorov
(University of Hawaii)
19/07/2013, 12:30
We consider the implications of the $E_6$ inspired supersymmetric (SUSY) models with an additional $U(1)_N$ gauge symmetry under which right--handed neutrinos have zero charge for collider phenomenology and cosmology. To ensure anomaly cancellation and gauge coupling unification the low energy matter content of
these models involve three $27$ representations of $E_6$ and a pair of $SU(2)$...
Yan Benhammou
(Tel Aviv University (IL))
19/07/2013, 12:30
The super-LHC (sLHC) is expected to operate with a luminosity of 7x1034 cm-2s-1 after the forthcoming luminosity upgrade which will increase by approximately a factor five, both the physics event rate and the beam background. It is essential to update the present inner most Muon Spectrometer components in the forward region to cope with these high rates. The small-strip Thin Gap Chambers...
Dr
David Milstead
(Stockholm University)
19/07/2013, 12:30
A direct search for relic monpoles has been made with a SQUID-based magnetometer using volcanic rock samples from the Arctic and Antarctic regions. Relic monopoles would have drifted due to the Earth's internal magnetic field. Enhanced monopole concentrations would therefore occur in the geomagnetic poles, thereby suppressing the sensitivity of previous matter searches. This search was...
Grigorios Chachamis
(IFIC (CSIC/UV) Valencia)
19/07/2013, 12:40
We will discuss the result with full mass dependence for the two-loop virtual QCD corrections to the W boson pair production in the quark-anti-quark annihilation channel. We will also report on our progress regarding the treatment of the double-real and virtual-real radiative corrections which are the other two necessary ingredients for a theoretical prediction of the total cross section to...
Pelin Kurt Garberson
(University of Illinois at Chicago (US))
19/07/2013, 12:44
An overview of the most recent results on jet quenching physics obtained using PbPb collision data collected with the CMS experiment at 2.76 TeV will be presented. These measurements make use of many different observables, including momentum imbalance of dijet and photon-jet events, nuclear modification factor RAA, as well as jet fragmentation functions, jet shapes, and flavor dependence of...
Philippe Mermod
(Universite de Geneve (CH))
19/07/2013, 12:45
The magnetic monopole appears in many new physics theories and its existence would explain the quantisation of electric charge. MoEDAL is the latest approved LHC experiment, designed to search directly for monopoles. It has now taken data for the first time. The MoEDAL detectors are based on two complementary techniques: nuclear-track detectors are sensitive to the high-ionisation signature...
Marcello Abbrescia
(Universita e INFN (IT))
19/07/2013, 12:45
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 cope with the increased pile-up, coming along with higher rates and radiation. Electronics can be modernized by profiting from recent developments. In addition, detector R&D is ongoing, to possibly...
Masaya Kohda
(National Taiwan University)
19/07/2013, 14:30
Flavour Physics and Fundamental Symmetries
Talk presentation
The very rare B0_d --> mu+ mu- decay may be the last chance for New Physics in flavor sector at the LHC, before the 13 TeV run in 2015. Partially motivated by the known tension in sin(2beta/phi_1), enhancement beyond (3-4) x 10^-10 would likely imply the effect of a fourth generation of quarks. If observed at this level, the 126 GeV boson may not be the actual Higgs boson, while the b --> d...
Cyrille Rosset
(APC Paris)
19/07/2013, 14:30
The Planck satellite, selected by ESA in 1996, was launched in 2009 and delivered on March 21st 2013 its first full sky maps of the millimetric emission at 9 frequencies, and maps derived from them, in particular the map of the anisotropies of the Cosmic Microwave Background (CMB). I will briefly recall the characteristics of the Planck instruments, and describe the data processing performed...
Dr
Marta Ruspa
(Universita e INFN (IT))
19/07/2013, 14:30
Inclusive diffraction, DVCS and vector meson production at HERA
(agreed talk with H1/ZEUS collaborations)
Attila Krasznahorkay
(New York University (US))
19/07/2013, 14:30
Measurements of the single top quark production cross sections in proton proton
collisions with the ATLAS detector at the Large Hadron Collider are presented.
Measurements of single topquark
production in the tand
Wtchannels
are shown and
determination of the CKM matrix element |Vtb| is discussed. We also discuss the separate
measurement of the top and antitop
quark cross section and...
Dr
Imma Riu
(IFAE Barcelona (ES))
19/07/2013, 14:30
The ATLAS Detector: Performance Results -
The ATLAS experiment is designed to study the proton-proton collisions
produced at the Large Hadron Collider (LHC) at CERN.
During Run I
data taking, the ATLAS trigger system has been used to collect
a rich
data sample which supports a wide variety of physics analyses.
The 2012 run saw larger luminosities and pile-up than 2011,...
Wolfgang Wagner
(Bergische Universitaet Wuppertal (DE))
19/07/2013, 14:45
Abstract: The discovery of a Higgs-?like boson with a mass of about 125 GeV has prompted the question of whether or not this particle is part of a much larger and more complex Higgs sector than that envisioned in the Standard Model. In this talk, we outline the current results from the ATLAS Experiment regarding Beyond-?the-?Standard Model (BSM) Higgs hypothesis tests. Searches for...
Dr
Ignacio Redondo Fernandez
(Centro de Investigaciones Energ. Medioambientales y Tecn. - (ES)
19/07/2013, 14:45
The Compact Muon Solenoid (CMS) detector is one of the two multipurpose
experiments at the Large Hadron Collider (LHC). CMS entered a phase of
maintenance and upgrade in February 2013, when LHC stopped operation.
The talk will present a brief selection of performance results obtained
during the 2012 run, focusing on the objects that lead to the Higgs
discovery measurements and ...
Flavio Archilli
(Frascati-LNF)
19/07/2013, 14:45
Flavour Physics and Fundamental Symmetries
Talk presentation
We present a review of the searches for very rare decays to muon final states performed at LHCb. Flavour changing neutral current processes, such as Bs→μ+μ– are highly suppressed in the Standard Model (SM). Such decays therefore allow the contributions from new processes or new heavy particles to significantly modify the expected SM rates. Charged lepton flavour violating processes (LFV),...
Alberto Orso Maria Iorio
(Universita e INFN (IT))
19/07/2013, 14:50
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...
Sergey Levonian
(Deutsches Elektronen-Synchrotron (DE))
19/07/2013, 14:50
Recent H1 results on diffraction (agreed talk with H1/ZEUS collaborations)
Alessandra Pastore
(Universita e INFN (IT))
19/07/2013, 14:55
The OPERA experiment built in the underground Gran Sasso laboratory (LNGS) has been designed to detect neutrino oscillations in direct appearance mode in the mu-neutrino to tau-neutrino channel. The apparatus consisting of 150 000 lead/emulsion modular targets complemented by electronic detectors is placed in the long-baseline CERN to Gran Sasso neutrino beam (CNGS) 730 km away from the...
Urs Langenegger
(Paul Scherrer Institut (CH))
19/07/2013, 15:00
Flavour Physics and Fundamental Symmetries
Talk presentation
Rare beauty meson decays B_s,d to mu+mu- are searched in pp collisions at LHC using a data sample collected by the CMS experiment. These decays are highly suppressed in the standard model. They can only proceed through the flavor-changing neutral currents, which are forbidden at tree-level diagrams. These decays are an excellent probe to the new physics; any difference between the measured...
Christoph Michael Langenbruch
(CERN),
Christoph Michael Langenbruch
(CERN)
19/07/2013, 15:00
The LHCb experiment is a spectrometer dedicated to the study of heavy flavor at
the LHC. The rate of proton-proton collisions at the LHC is 15 MHz, of which
only 5 kHz can be written to storage for offline analytsis. For this reason the
LHCb data acquisition system -- trigger -- plays a key role in selecting signal
events and rejecting background. In contrast to previous experiments at...
Mariusz Sadzikowski
(Jagiellonian University)
19/07/2013, 15:05
I discuss a twist decomposition of difractive structure functions in
the difractive deep inelastic scattering (DDIS) at HERA. At low
photon virtuality and at large energy the data exhibit a strong excess above the twist-two NLO DGLAP description. It is found, that complementing the DGLAP fit by twist 4 and 6 components of the
GBW saturation model leads to a good description of data.
In...
Dr
Gabriele Benelli
(University of Kansas (US))
19/07/2013, 15:05
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. The...
Gianluca Lamanna
(Sezione di Pisa (IT))
19/07/2013, 15:15
We describe a pilot project for the use of GPUs (Graphics processing units) in online triggering applications for high energy physics experiments. Two major trends can be identified in the development of trigger and DAQ systems for particle physics experiments: the massive use of general-purpose commodity systems such as commercial multicore PC farms for data acquisition, and the reduction of...
Jochen Schieck
(Ludwig-Maximilians-Univ. Muenchen (DE))
19/07/2013, 15:15
Flavour Physics and Fundamental Symmetries
Talk presentation
Evidence for New Physics signatures is searched in processes that are naturally suppressed in the Standard Model. Recent results on the angular distribution parameters AFB and FL describing the decay Bd -> K*mu+mu- -> K+pi-mu+mu- are presented. The accuracy obtained from data collected in 2011 is comparable to the best previous measurement in the region q^2(mu+mu-)>16 GeV^2.
New results on...
Mr
Philipp Roloff
(Deutsches Elektronen-Synchrotron (DESY)),
Philipp Roloff
(DESY), Dr
Philipp Roloff
(CERN)
19/07/2013, 15:20
Differential inclusive-jet cross sections have been measured
in photoproduction for boson virtualities Q2 < 1 GeV2 with the ZEUS
detector at HERA using an integrated luminosity of 300 pb-1.
Jets were identified in the laboratory using the kt cluster algorithm
in the longitudinally inclusive mode.
Cross sections are presented as functions of the jet pseudorapidity, etajet,
and the...
Aruna Nayak
(CEA/IRFU,Centre d'etude de Saclay Gif-sur-Yvette (FR))
19/07/2013, 15:20
The most recent CMS results from the search for a MSSM Higgs boson in the bb and tau tau channesl, using the full dataset recorded at the LHC from pp collisions at centre of mass energies of 7 and 8 TeV, will be presented.
Results are also presented on charged Higgs boson searches as well as searches of Higgs-like particles beyond MSSM.
Aran Garcia-Bellido Alvarez De Miranda
(University of Rochester (US))
19/07/2013, 15:20
We present the most recent results from the CDF and D0 Collaborations on searches for electroweak top quark production in proton-antiproton collisions at sqrt(s)=1.96 TeV at Fermilab's Tevatron Collider. Single top signal is separated from background processes using multivariate analysis methods. The final result is compared to state-of-art theory predictions.
Dr
Christian Buck
(Max Planck Institute für Kernphysik)
19/07/2013, 15:25
The double Chooz expeirment is one of the few experiements currently measuring the neutrino mixing angle téta 13 , and the only one located in Europe. It gathers 10 European universities and laboratories (Germany,France,Spain) and about 2à form USA,Russia , Japan and Brazil.
The expeirment will update this year its 2012 results, with more statistics. The current data analysis will...
Mark Williams
19/07/2013, 15:30
Flavour Physics and Fundamental Symmetries
Talk presentation
The decay B_s -> mu mu is heavily suppressed in the standard model, but many scenarios for physics beyond the standard model predict large enhancements in this process. We report an updated search for this decay using data collected by the D0 detector at the Fermilab Tevatron collider. We use the full Run II data set, corresponding to approximately 10.4 fb-1 of integrated luminosity in p...
Michel Sauter
19/07/2013, 15:35
Recent H1 results on Heavy Flavour Photoproduction
(agreed talk with H1/ZEUS collaborations)
Stefano Antonelli
(Universita e INFN (IT))
19/07/2013, 15:40
A search for single-top production, ep -> etX, has been performed with the
ZEUS detector at HERA using data corresponding to an integrated luminosity of 0.37 fb-1.
No evidence for top production was found, consistent with the
expectation from the Standard Model.
Limits were computed for single-top production via flavour changing neutral current transitions.
The result was combined with a...
Johannes Elmsheuser
(Ludwig-Maximilians-Univ. Muenchen (DE))
19/07/2013, 15:40
The Higgs-like boson discovered by the ATLAS and CMS collaborations is a candidate for the last unobserved particle predicted by the Standard Model (SM). The next experimental step is the measurement of its properties, most notably its couplings. This contribution presents the searches for the SM Higgs boson via decays in rare modes such as Z-gamma and di-muon final states, and for invisible decays.
Bruce Hoeneisen
(Universidad San Francisco de Quito)
19/07/2013, 15:45
Flavour Physics and Fundamental Symmetries
Talk presentation
The DO Collaboration has published three measurements of the like-sign dimuon charge asymmetry in p-pbar collisions at the Fermilab Tevatron collider. The result is significantly different from the standard model prediction. We present the final measurement of this CP-violating asymmetry, using the full 10 fb^-1 of data collected during Run II, and discuss its possible interpretations.
Rupert Leitner
(Charles University (CZ))
19/07/2013, 15:45
In 2012 the Daya Bay reactor neutrino experiment has observed the disappearance of electron antineutrinos at about 2 km. Within the three-neutrino flavor framework this result can be used for measuring a value of sin2( 2θ13) for the neutrino mixing angle θ13. The latest published result of sin2( 2θ13) = 0.089±0.010(stat.) ±0.005(syst.) from the Daya Bay experiment is to date the most precise...
Julien Cogan
(Centre National de la Recherche Scientifique (FR))
19/07/2013, 15:45
The LHCb experiment is designed to perform high-precision measurements of CP violation and search for New Physics using the enormous flux of beauty and charmed hadrons produced at the LHC. The operation and the results obtained from the data collected in 2010 and 2011 demonstrate that the detector is robust and functioning very well. However, the limit of 1 fb–1 of data per nominal year cannot...
Lidia Goerlich
(Kraków Univ)
19/07/2013, 15:50
Dr
Alexander Korzenev
(Universite de Geneve (CH))
19/07/2013, 16:00
New results of NA61/SHINE on determination of charged hadron yields in proton-carbon interactions are presented. They aim to improve predictions of the neutrino flux in the T2K experiment. The data were recorded using a secondary-proton beam of 31 GeV/c momentum from CERN SPS which impinges on a graphite target. To determine the inclusive production cross-section for charged pions, kaons and...
Olga Kochebina
(Universite de Paris-Sud 11 (FR))
19/07/2013, 16:00
Flavour Physics and Fundamental Symmetries
Talk presentation
Flavour-changing neutral current decays such as c→ul+l– are highly suppressed in the Standard Model (SM), but may be enhanced by New Physics. For D0→μ+μ–, the SM decay rate is dominated by long distance contributions but is still a few order of magnitudes below the current experimental limit. In decays such as D+→π+μ+μ–, measuring the differential branching ratio as a function of the μ+μ–...
Prof.
Costas Fountas
(University of Ioannina (GR))
19/07/2013, 16:00
to be provided by the CMS Collaboration
Kenneth Oesterberg
(Helsinki Institute of Physics (FI)),
Kenneth Osterberg
(University of Helsinki)
19/07/2013, 16:10
TOTEM is dedicated experiment at the LHC to the measurements of elastic, diffractive and other forward processes. Elastically and diffractively scattered protons are measured using silicon detectors in Roman Pots (RP) and charged particles by the T1 and T2 telescopes covering the pseudorapidity range 3.1 to 6.5.
TOTEM has measured the luminosity-independent total, elastic and inelastic...
Dr
Peter Vankov
(Deutsches Elektronen-Synchrotron (DE))
19/07/2013, 16:15
After successful LHC operation at the center-of-mass energy of 7 and 8
TeV in 2011 and 2012, plans are actively advancing for a series of
upgrades, culminating roughly 10 years from now in the high luminosity
LHC (HL-LHC) project, delivering of order five times the LHC nominal
instantaneous luminosity along with luminosity levelling. The final
goal is to extend the data set from about few...
MING-CHUAN CHANG
(FU JEN CATHOLIC UNIVERSITY)
19/07/2013, 16:15
Many extensions of the Standard Model (SM) introduce an additional U(1) interaction, which is mediated by a U(1) boson, often by a Higgs mechanism adding a dark Higgs (or dark Higgses) to the models. This gauge boson, also known as the ``Dark Photon,'' typically has very weak coupling to the SM particles. Experimental results from direct Dark Matter searches, (e.g. DAMA/LIBRA) and other...
Evgenii Baldin
(BINP)
19/07/2013, 16:15
Flavour Physics and Fundamental Symmetries
Talk presentation
The ratio of the partial width of $J/\psi$ decays into $e^+e^-$ and $\mu^+\mu^-$ pairs are measured using a data sample of $7\cdot10^{6}$ \(J/\psi\) events recorded by the KEDR detector at the VEPP-4M collider. Our preliminary
result are:
\[\Gamma_{ee}/\Gamma_{\mu\mu}=0.9965\pm0.0045\pm0.0050.\]
Michele Maltoni
(Instituto de Fisica Teorica UAM/CSIC)
19/07/2013, 17:00
The vast majority of solar, atmospheric, reactor and accelerator neutrino data are presently well explained by the hypothesis that neutrinos are massive and that flavor conversion occurs among the three known neutrino flavors. However, a few experiments seem to indicate deviations from this scenario. In this talk I will first present an up-to-date global analysis of neutrino data in the...
Chiara Zampolli
(Universita e INFN (IT))
19/07/2013, 17:00
ALICE is the LHC experiment dedicated to the study of ultra-relativistic Heavy-Ion collisions. Among the main characteristics of ALICE, its very low pT cut-off and material budget make it play an important role in the LHC pp physics program, especially in the soft QCD realm. In addition, pp collisions are of fundamental importance to provide input for Monte Carlo tuning, and to serve as a...
Benjamin Audren
(EPFL Lausanne)
19/07/2013, 17:00
I will present forecasts for the accuracy of determining the parameters of a minimal LCDM and the total neutrino mass for a Euclid-like survey. To include as much information as possible, and use the midly non-linear scales in a meaningful way, I will present our method of including theoretical errors.
Two sets of errors are considered: (i) one to account for uncertainties in the modelling of...
Dr
Joaquim Matias
(Universitat Autonoma de Barcelona)
19/07/2013, 17:00
Flavour Physics and Fundamental Symmetries
Talk presentation
We present a basis of observables to explore and extract all the information from the 4 body angular distribution B->K*(->Kpi)mu+mu- focusing on CP conserving and CP-violating observables at large and low recoil. We identify an optimal basis of observables that balances experimental and theoretical advantages, we present their SM predictions in all regions and discuss their complementarity in...
Thomas Bergauer
(Austrian Academy of Sciences (AT))
19/07/2013, 17:00
The Belle experiment in Tsukuba (Japan) has been designed to measure rare decays in the B system with high statistics. Currently, both the KEK-B e+/e- collider and the Belle experiment are being upgraded to provide and cope with an ultimate luminosity of 8x10^35 cm-2 s-1.
Since the previous Silicon Vertex Detector (SVD) cannot be operated with the 40-fold increased luminosity after the...
Sandra Leone
(Sezione di Pisa (IT))
19/07/2013, 17:00
We present the most recent results from the CDF and D0 Collaborations on top quark properties at Fermilab's Tevatron Collider. In particular we discuss the spin correlation measurements, top width measurement, V_tb measurements, searches for anomalous top quark couplings, and searches for Lorentz invariance violation.
Danny van Dyk
(TU Dortmund)
19/07/2013, 17:15
Flavour Physics and Fundamental Symmetries
Talk presentation
We review the constraints on a subset of |Delta B| = |Delta S| = 1 Wilson coefficients from available data on rare radiative b->s gamma and (semi)leptonic b\to s\ell^+\ell^- decays. Specifically, we revisit
the benefits of a Bayesian global analysis in the form of correlated
posteriors of the Wilson coefficients and several hadronic quantities. Preliminary results are presented based on data...
Dr
Daniel Hayden
(Michigan State University (US))
19/07/2013, 17:15
Events containing several leptons or lepton of similar flavour and electric charge are useful probes of new phenomena due to the low background from Standard Model processes.
We look for anomalous production of prompt like-sign leptons or events with three or more leptons, as well as search for excited leptons, heavy leptons and heavy neutrinos. The searches use data recorded in 2012 at...
Marco Meissner
(Ruprecht-Karls-Universitaet Heidelberg (DE))
19/07/2013, 17:15
Due to its unique pseudorapidity coverage and the possibility of extending measurements to low transverse momenta, LHCb provides important input to the understanding of particle production in a kinematical range where QCD models have large uncertainties. Measurements of charged, strange and charmed particle production and energy flow are performed in the approximate pseudorapidity range...
Lucia Masetti
(Johannes-Gutenberg-Universitaet Mainz (DE))
19/07/2013, 17:20
Properties of the top quark are measured with the ATLAS detector using the Large Hadron
Collider protonproton
collisions data. Measurements of the topquark
mass, charge and
polarisation, as well as of the polarization of W bosons in top quark decays to probe the
Wtbvertex
are presented. The search for flavour changing neutral current processes in top
quark decays is reviewed.
Albert Puig Navarro
(Ecole Polytechnique Federale de Lausanne (CH))
19/07/2013, 17:30
Flavour Physics and Fundamental Symmetries
Talk presentation
Radiative B decays are sensitive probes of New Physics. We present the latest results on these decays from the LHCb experiment. Results include first measurements of new decay modes and studies that are sensitive to physics beyond the Standard Model that may affect the polarisation of the emitted photon in radiative B decays.
Claire Gwenlan
(University of Oxford (GB))
19/07/2013, 17:30
Katja Klein
(Rheinisch-Westfaelische Tech. Hoch. (DE))
19/07/2013, 17:30
The performance of the Tracker of the CMS experiment, comprising of a pixel and a strip detector, has so far been excellent, as reflected in the wealth of beautiful physics results from CMS. However, the foreseen increases of both the instantaneous as well as the integrated luminosity by the LHC during the next ten years will necessitate a stepwise upgrade of the CMS tracking detector.
In...
Tord Johan Carl Ekelof
(Uppsala University (SE))
19/07/2013, 17:40
The European Spallation Source linac has the potential to become the proton driver of - in addition to the world’s most intense pulsed spallation neutron source - the world’s most intense neutrino beam. The physics performance of this neutrino beam in conjunction with a megaton water Cherenkov neutrino detector installed ca 1000 m down in a mine at a distance of ca 500 km from ESS will be...
Dr
Mara Senghi Soares
(Centro de Investigaciones Energ. Medioambientales y Tecn. - (ES)
19/07/2013, 17:40
Several measurements of top quark properties are presented using data collected by the CMS experiment during the years 2011 and 2012. The top quark polarization as well as the polarization of W bosons in top quark decays are measured.
The W-boson helicity fractions and angular asymmetries are extracted and limits on anomalous contributions to the Wtb vertex are determined. Furthermore, a...
Diego Valerio Chialva
(U)
19/07/2013, 17:45
We discuss how high-energy physics (in particular in the cases of loop corrections, particle production, Lorentz violation) affects the correlators of primordial cosmological perturbation, and how this would be reflected in observations. We study features such as the possibility of enhancements or oscillations, and analyze the sensitivity of observables to the scale of high-energy physics,...
Samuel King
(University of British Columbia (CA))
19/07/2013, 17:45
Many supersymmetry models feature neutralinos, charginos and also sleptons with masses less than a few hundred GeV. These can give rise to direct pair production rates at the LHC that can be observed in the data sample recorded by the ATLAS detector. The talk presents results from searches for neutralinos, charginos and slepton pair production in final states with leptons.
Nicola Serra
(Universitaet Zuerich (CH))
19/07/2013, 17:45
Flavour Physics and Fundamental Symmetries
Talk presentation
Rare b→sμ+μ– transitions that proceed via flavour changing neutral currents are suppressed in the SM and provide a sensitive probe of new physics contributions entering in competing diagrams. The dataset collected with the LHCb experiment has enabled measurements to be made in decays such as B→K*0μ+μ–, B+→K+μ+μ– and Bs→φμ+μ–. Particularly interesting are the angular and isospin asymmetries in...
Richard D. Field,
Richard Dryden Field
(University of Florida (US))
19/07/2013, 17:47
At CDF we study charged particles production (pT > 0.5 GeV/c,
|eta| < 0.8) in proton-antiproton collisions at 300 GeV, 900 GeV,
and 1.96 TeV. The 300 GeV and 900 GeV data are a result of the "Tevatron Energy Scan" which was performed just before the Tevatron was shut down.
We use the direction of the leading charged particle in each event, PTmax, to define three regions of eta-phi...
Hide-Kazu Tanaka
(ICRR),
Hidekazu TANAKA
(ICRR)
19/07/2013, 17:55
The Hyper-Kamiokande, which we are currently developing, is designed to be the next
decade's flagship experiment for the study of neutrino oscillations, nucleon decays, and astrophysical neutrinos. The detector is the third generation underground water
Cherenkov detector at Kamioka. Holding 1 million ton water target being about 20 times
larger than the Super-Kamiokande, the detector...
Yutaro Sato
(Tohoku Univ.),
Yutaro Sato
(Nagoya University)
19/07/2013, 18:00
Flavour Physics and Fundamental Symmetries
Talk presentation
The charmless $B^0$ decay to $p \bar{\Lambda} \pi^- \gamma$ final state proceeds via the $b \to s \gamma$ radiative penguin process at the quark level and has never been observed. We present the result of the search for this decay using the full data sample collected at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB asymmetric energy $e^+ e^-$ collider.
Lesya Shchutska
(University of Florida (US))
19/07/2013, 18:00
In this talk, the latest results from CMS on searches for EWK production of Gauginos and Sleptons, in a variety of complementary final state signatures and methods, will be presented using up to 20/fb of data from the 8 TeV LHC run of 2012.
Liza Mijovic
(CEA-Saclay)
19/07/2013, 18:00
In protonproton
collisions at the Large Hadron Collider, pairs of top and antitop
quarks are
expected to be mostly produced through gluon fusion, in contrast to production at the Tevatron,
where quark annihilation dominates. Making use of the large number of top quark pairs, we
present measurements of the spin correlation between top and antitop
quarks as well as of the
topquark
charge...
Jochen Kaminski
(Universitaet Bonn (DE))
19/07/2013, 18:00
The tracking detectors proposed for future linear collider experiments (ILC and CLIC) are based either on silicon layers or time-projection detector technology. Both tracking systems are designed to be an integral part of a particle flow algorithm approach to excellent jet energy measurement, but also to yield superb individual charged particle momentum resolution for reconstruction of the...
Ramandeep Kumar
(Panjab University (IN))
19/07/2013, 18:02
Fergus Wilson
(STFC - Science & Technology Facilities Council (GB))
19/07/2013, 18:15
Flavour Physics and Fundamental Symmetries
Talk presentation
We report on studies of B-meson decays via radiative or
electroweak penguin recently performed using the large
data set collected with the BaBar detector.
Sensitivity to New Physics is tested through measurements of
decay rates, rate asymmetries, and CP asymmetries, in several
b -> s gamma, b -> s l+l-, b -> d gamma, and b -> d l+l- processes.
Mikhail Danilov
(ITEP Institute for Theoretical and Experimental Physics (RU))
19/07/2013, 18:15
A solid scintillator detector DANSS (Detector of Anti-Neutrino based on Solid Scintillator) designed for remote on-line diagnostics of nuclear reactor parameters and a search for short range neutrino oscillation is under construction now. It will be installed at the Kalinin Nuclear Power Plant next year. DANSS is a 1 m3 plastic scintillator detector divided into 2500 cells and surrounded with...
Tyler Mc Millan Dorland
(Deutsches Elektronen-Synchrotron (DE))
19/07/2013, 18:20
Measurements are presented of the properties of top quark pairs in 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 both inclusively and differentially as function of the invariant mass, the rapidity and the transverse momentum of the...
David Michael South
(Deutsches Elektronen-Synchrotron (DE))
19/07/2013, 18:30
The international study group on data preservation in high energy physics, DPHEP, achieved a milestone in 2012 with the publication of its eagerly anticipated large scale report, which contains a description of data preservation activities from all major high energy physics collider-based experiments and laboratories. A central message of the report is that data preservation in HEP is not...
Gianluca Lamanna
(Sezione di Pisa (IT))
19/07/2013, 18:30
Flavour Physics and Fundamental Symmetries
Talk presentation
The sensitivity of the NA62 experiment at CERN to charged kaon decays
violating lepton number conservation, neutral pion decays forbidden in the
Standard Model and heavy sterile neutrinos is discussed. These tests would probe new physics scenarios involving heavy Majorana neutrinos or R-parity violating SUSY.
An upper limit on the lepton number violating K+- to pi-+ mu+- mu+- decay rate...
Mr
Tim Stefaniak
(Bonn University)
19/07/2013, 18:33
We present results from the latest global fit analysis of the constrained supersymmetric models CMSSM and NUHM1/2 performed with the Fittino framework. The fit includes low-energy and astrophysical observables as well as collider constraints from the non-observation of new physics in supersymmetric searches at the LHC. Furthermore, the Higgs boson mass and signal rate measurements from both...
Dominik Werder
(Uppsala Universitet),
Dominik Werder
(Uppsala Universitet)
19/07/2013, 18:34
The recent ATLAS data on dijet production with a veto on the additional interjet radiation is described by using the Banfi-Marchesini-Smye equation, which resums both the Sudakov logarithms as well as the non-global logarithms to leading log accuracy, to constrain the interjet energy flow. Without additional fit parameters, a good description of the data is obtained. Implications for BFKL...
Sankagiri Umasankar
(IIT Bombay)
19/07/2013, 18:40
Recent measurement of a moderately large value of theta13 has opened up exciting possibilities for current and future neutrino oscillation experiments, in particular to determine the neutrino mass hierarchy
and the octant of theta23. Determination of these parameters will
provide us with crucial additional inputs to develop a theory of neutrino masses. Current experiments can determine these...
r Demina
(University of Rochester (US)), Dr
regina demina
(university of rochester)
19/07/2013, 18:40
We present the most recent measurements by the CDF and D0 Collaborations of forward-backward asymmetries in top-antitop quark pair production in proton-antiproton collisions. Measurements are corrected for acceptance and resolution effects and compared to theory predictions.
Erika De Lucia
(Laboratori Nazionali di Frascati (LNF)-Istituto Nazionale Fisic)
19/07/2013, 18:45
Flavour Physics and Fundamental Symmetries
Talk presentation
The Ks --> 3pi0 decay is a pure CP violating process which, assuming
CPT invariance, allows direct CP violation to be investigated. This
decay has not been observed so far, and the best upper limit on the
branching ratio BR(KS --> 3pi0)< 1.2 10-7 is two orders of magnitude
larger than predictions based on the Standard Model. We present the
search for the Ks --> 3pi0 decay performed with...
Danilo Domenici
(Istituto Nazionale Fisica Nucleare (IT))
19/07/2013, 18:45
Three new subdetectors are being installed in the KLOE apparatus of the Laboratori Nazionali di Frascati of INFN, for a new data taking period due to start in late summer 2013.
Photon detection is upgraded by means of a small crystal calorimeter in the very forward direction and of a tungsten-scintillating tiles sampling device instrumenting the low-beta quadrupoles of the accelerator.
A...
Marek Schoenherr
(University of Durham)
19/07/2013, 18:49
The merging of matrix elements and parton showers is an established calculational tool for the description of multi-jet final states at hadron colliders. These methods have recently been promoted to next-to-leading order accuracy in the description of hard well separated jets. This talk will introduce such a method and discuss its application to phenomenologically relevant signal and...
Stanislav Dubnicka
(Institute of Physics)
20/07/2013, 09:00
Description of the nucleon electromagnetic structure by advanced Unitary and Analytic approach, respecting SU(3) symmetry and analyzing also the recent Mainz MAMI data with impact on the proton charge radius to be compared with the results from the muon hydrogen atom spectroscopy.
Carla Maria Cattadori
(INFN)
20/07/2013, 09:00
Since November 2011, GERDA is operating with its novel technique, about 18 kg of enriched Ge detectors searching both for neutrinoless and two neutrino accompanied double beta decay of Ge-76. In this talk first results on neutrinoless decay and the recently published results on two neutrino accompanied decay will be reported, as well as the background interpretation model. The apparatus...
Matthijs Hogervorst
(LPTENS)
20/07/2013, 09:00
The bootstrap program in conformal field theory aims at understanding higher-dimensional CFTs by imposing consistency conditions. These constraints rely on the knowledge of conformal blocks, which are special functions that sum up to conformal four point functions. Although they are notoriously difficult to compute, recent work has lead to a better understanding of these conformal blocks. In...
Zhenwei Yang
(Tsinghua University (CN)), Dr
Zhenwei Yang
(Tsinghua University (CN))
20/07/2013, 09:00
Victor Egorychev
(ITEP Institute for Theoretical and Experimental Physics (RU))
20/07/2013, 09:00
Flavour Physics and Fundamental Symmetries
Talk presentation
The LHCb experiment is a forward arm spectrometer designed to make high precision measurements of b hadron decays at the LHC. LHCb's efficient dimuon trigger allows to perform studies of B mesons decaying to charmonia with high precision. We will present new measurements of the relative branching ratios of exclusive b decays to final states involving J/ψ and ψ(2S) mesons, together with other...
Uta Klein
(University of Liverpool (GB))
20/07/2013, 09:00
The Large Hadron Electron Collider (LHeC) is a proposed facility which will exploit the new world of energy and intensity offered by the LHC through collisions with a new 60 GeV electron beam. The LHeC opens the possibility for precision studies of the Higgs Boson which in electron-proton collisions is most abundantly produced in the WW channel of e^-p charged current scattering. An LHeC...
Eckhard Elsen
(Deutsches Elektronen-Synchrotron (DE))
20/07/2013, 09:00
Linear e+e- colliders of up to 500 GeV cms energy provide a very efficient opportunity for production of Higgs particles and the study of the couplings. The nature of the recently discovered particle can so be explored in fine detail complementing the measurements of the LHC. The ILC, based on superconducting technology, is the most advanced proposal for such a machine for which recently the...
Roland Waldi
(Universitaet Rostock (DE))
20/07/2013, 09:15
Flavour Physics and Fundamental Symmetries
Talk presentation
Baryonic decays account for about 7% of the B-meson width,
and have been studied in recent years by the B factories.
These studies reveal properties of hadronization at low q^2,
such as s anti-s suppression known from jet fragmentation,
and phase space relations between the baryon and antibaryon.
The measurement and comparison of exclusive branching fractions
of baryonic B decays...
Matthias Richter
(University of Oslo (NO))
20/07/2013, 09:20
The study of heavy flavor production in proton-proton collisions is of particular interest for quantum chromodynamics (QCD), as charm and beauty quarks possess large masses and are thus mainly created in hard partonic scattering processes. Cross sections obtained from measurements for charm and beauty quarks allow to constrain theories and to provide important parameters for model...
589.
The QWeak Experiment: A measurement of the proton weak charge and up-down quark weak couplings.
Michael Gericke
(University of Manitoba)
20/07/2013, 09:20
The Qweak collaboration recently completed a two year long program of measurements, with the aim of making a precision measurement of the parity violating analyzing power from elastic scattering of 1.16 GeV, longitudinally polarized, electrons on protons at low momentum transfer $Q^2 = 0.025~\rm{GeV/c^2}$. At low momentum transfer, the measured asymmetry is directly related to the weak charge...
Guido Festuccia
(University of California Santa Cruz),
guido festuccia
(I)
20/07/2013, 09:23
I will present some properties of R-symmetric N=1 theories on Euclidean four manifolds M which allow to preserve at least one supersymmetry. This is shown to be possible on any complex manifold. I consider in particular the dependence of supersymmetric observables on the geometric structure of M.
Tamer Tolba
(Bern University)
20/07/2013, 09:25
In the search for the nature of the neutrino, neutrinoless double beta decay (0νββ) plays a significant role in understanding its properties. By measuring the 0νββ decay rate, it is hoped to verify the nature of the neutrino (Majorana or Dirac particle), lepton number violation and help determine the values for the absolute neutrino masses. The Enriched Xenon Observatory (EXO) is aiming at...
Dr
Tomas Lastovicka
(Acad. of Sciences of the Czech Rep. (CZ))
20/07/2013, 09:30
A linear e+e- collider running at center-of-mass energies in the range from 350 GeV to 3 TeV provides excellent possibilities for Higgs precision measurements. Precison Higgs (and top) measurements can be performed around 350 GeV, where the Higgs is studied in a model-independent way through its recoil against a Z boson in the Higgsstrahlung process, providing not only an accurate mass...
Stefano Perazzini
(Universita e INFN (IT))
20/07/2013, 09:30
Flavour Physics and Fundamental Symmetries
Talk presentation
Direct and mixing-induced CP violation observables in charmless charged two-body B decays may provide valuable information in the quest for physics beyond the Standard Model. Owing to the large beauty production cross-section at the LHC and to the unique characteristics of the LHCb detector and trigger, unprecedented samples of such decays are becoming available. We present updated...
Ilse Kratschmer
(Austrian Academy of Sciences (AT)),
Ilse Kratschmer
(Austrian Academy of Sciences (AT))
20/07/2013, 09:35
Markus Cristinziani
(Universitaet Bonn (DE))
20/07/2013, 09:40
Started at the end of 2011 the TOPLHCWG is in charge to prepare and
perform combinations of top related measurements from the LHC
experiments. So far a first top quark mass combination was released
along with combinations of the top quark pair production cross-section
and the W helicity in top quark decays. In this talk the challenges and the
progress in such combinations are presented...
Pawel Guzowski
(University of Manchester)
20/07/2013, 09:45
The NEMO-3 and SuperNEMO experiments aim to search for neutrinoless double beta decay. If observed, this would show that the neutrino is its own antiparticle, and be the the first evidence of lepton number violation. The unique setup of the experiments, using a tracker-calorimeter technique, is able to measure the full kinematic signature of the decays. This will help in determining the...
James McCarthy
20/07/2013, 09:45
Flavour Physics and Fundamental Symmetries
Talk presentation
Charmless multibody B decays proceeding through the quark transitions
b → q qbar s(d) are relevant laboratories to study both direct and mixing-induced CP violation effects and to search for deviations from the Standard Model expectations. The dataset recorded by the LHCb experiment has been analysed to reconstruct B+, B0, Bs0 and Lambda_b decays into various multibody final states. We...
Anton Nedelin
(Uppsala University)
20/07/2013, 09:46
In this talk I will present our recent results on 5D super Yang-Mills theory and it`s relation with 6D (2,0) superconformal theory. In particular I will discuss how N^3 behaviour of 5D super Yang-Mills free energy can be derived with the use of localization technique. And then I will show, that results obtained from localization technique in 5D super Yang-Mills are consistent with the...
Miriam Watson
(University of Birmingham (GB))
20/07/2013, 09:53
Michael Prim
(Karlsruhe Institute of Technology)
20/07/2013, 10:00
Flavour Physics and Fundamental Symmetries
Talk presentation
We report results of an angular analysis and search for CP violation in the $B^0\to\phi (K^+\pi^-)^0$ decay. We perform a coherent amplitude analysis of the system up to an invariant mass of $1.55 \text{GeV}$ of the $(K^+\pi^-)^0$ pair. The analysis is based on a data sample of $772\times 10^6$ $B\overline{B}$ pairs collected at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB...
Nikos Konstantinidis
(University College London (UK))
20/07/2013, 10:00
Prospects on the measurement of the coupling properties of the recently discovered Higgs boson at a mass of 125 GeV, for two luminosity scenarios 300 fb-1 (LHC) and 3 ab-1 (High Luminosity LHC) are presented.
830.
Research on high-field superconducting magnets and prospects for higher-energy hadron colliders
Frederick Bordry
(CERN)
20/07/2013, 10:00
To be submitted
Thomas Banks
(UC Berkeley)
20/07/2013, 10:00
The Cryogenic Underground Observatory for Rare Events (CUORE) is an upcoming experiment whose primary goal is to search for neutrinoless double beta decay (0nuBB) in Te-130. The detector will consist of 988 TeO2 crystal bolometers arranged into 19 towers and cooled to 10 mK inside a custom-built cryostat at the underground Gran Sasso National Laboratory (LNGS), Italy, which provides the...
Marcus Berg
(K),
Marcus Berg
20/07/2013, 10:09
I will briefly review string effective actions of orientifolds with D-branes, and their relevance to string models in cosmology and phenomenology. I discuss recent work on the evaluation of string one-loop contributions to the moduli space metric of closed string moduli in toroidal minimally supersymmetric (Calabi-Yau) orientifolds with D-branes. The focus is on poorly understood (twisted)...
Damir Becirevic
(CNRS et Universite Paris Sud),
Damir Becirevic
(Unknown)
20/07/2013, 10:11
A long standing problem of theoretical estimate of the $J/\psi \to \eta_c \gamma$ decay amplitude has been solved recently by means of QCD on the latice. We describe and explain the progress and discuss the new results that are also a challenge to experimenters. We also discuss several other decay modes of charmonia, including the very first estimate of $\eta_c(2S)\to J/\psi \gamma$ that was...
Justin Albert
(University of Victoria (CA))
20/07/2013, 10:15
Flavour Physics and Fundamental Symmetries
Talk presentation
The B decays to omega omega, and omega phi decays are
related to B -> phi K* via an SU(3) rotation.
The study of these yet unseen decay modes can therefore
provide information regarding the unexpectedly small value
of the longitudinal spin component (f_L) measured in
B -> phi K* decays.
We present the results of a new search for these decay modes,
as well as other charmless B...
Jenny List
(Deutsches Elektronen-Synchrotron (DE))
20/07/2013, 11:00
A unique feature of the future e+e- linear collider is the ability to provide
longitudinal polarised beams. In order to fully exploit the benefits of the
polarised beams, the luminosity weighted average polarisation needs to be known
with a permille-level precision. A method for measuring the beam polarisation
from the collision data is presented. It is based on a realistic...
Prof.
Dimitri Polyakov
(CQUEST, Sogang University)
20/07/2013, 11:00
We calculate the graviton's $\beta$-function in $AdS$ string-theoretic sigma-mod
el,
perturbed by vertex operators for Vasiliev's higher spin gauge fields
in $AdS_5$. The result is given by $\beta_{mn}=R_{mn}-8T_{mn}(g,u)$
(with AdS radius set to 1 and the graviton polarized
along the $AdS_5$ boundary), with the matter stress-energy
tensor $T_{mn}$ given by that of conformal holographic...
Lars Eklund
(University of Glasgow (GB))
20/07/2013, 11:00
Flavour Physics and Fundamental Symmetries
Talk presentation
Precision measurements of b-hadron lifetimes are a key goal of the LHCb experiment. In the Bs0 sector, the measurement of the effective lifetimes for Bs0 mesons decaying to CP-odd, CP-even and flavour specific final states are essential for constraining the Bs0 mixing parameters, ΔΓs, the average width Γs and the CP-violating phase, φs. Measurements of b baryon lifetimes are also important to...
Evgueni Goudzovski
(University of Birmingham)
20/07/2013, 11:00
Recent measurements of the rare decay K+- --> pi+- gamma gamma at the NA48/2 and NA62 experiments are presented, including model-independent spectrum measurements and fits to the Chiral Perturbation Theory description. Precision measurements of the form factors and branching ratios of the K+- --> pi+ pi- e+- nu and K+- --> pi0 pi0 e+- nu decays at the NA48/2 experiment are also presented.
Dr
Emiliano Molinaro
(TUM)
20/07/2013, 11:00
We propose a UV completion of the inverse see-saw scenario of neutrino mass generation, where the Standard Model gauge group is extended by a U(1) symmetry. Within this framework, a variation of the standard thermal leptogenesis is achievable at the O(TeV) scale, owing to the presence of a viable dark matter candidate. The scalar and fermion sector of the model can be tested at LHC and in...
Matthew Mottram
(University of Sussex)
20/07/2013, 11:00
One of the most important open questions in neutrino physics is the question of whether neutrinos are Majorana or Dirac particles. Attempts to detect the (possible) Majorana nature of neutrinos focus around the double beta decay process. If neutrinoless double beta decay were observed, it would not only prove that neutrinos are Majorana particles, but it would also provide a measurement of the...
Sebastian Wandernoth
(Ruprecht-Karls-Universitaet Heidelberg (DE))
20/07/2013, 11:15
Flavour Physics and Fundamental Symmetries
Talk presentation
The study of CP violation in Bs oscillations is one of the key goals of the LHCb experiment. Effects are predicted to be very small in the Standard Model but can be significantly enhanced in many models of new physics. We present the world’s best measurement of the CP-violating phase φs using B0s → J/ψφ and B0s → J/ψππ decays, and first study of related measurements in other decay modes.
Kerstin Hoepfner
(Rheinisch-Westfaelische Tech. Hoch. (DE))
20/07/2013, 11:15
Searches for new physics in the monojet and monophoton final state from CMS are presented. Results will be interpreted in a number of contexts, including dark matter production. Searches for flavored dark matter will also be presented.
Roman Poeschl
(Universite de Paris-Sud 11 (FR))
20/07/2013, 11:20
Top quark production in the process e+e- -> ttbar at a future linear electron
positron collider with polarised beams is a powerful tool to determine the
scale of new physics. The presented study assumes a centre-of-mass energy of
500 GeV and an integrated luminosity of 500 fb-1 equally shared between the
incoming beam polarisations of (Pe+, Pe-) = (+/-0.8,-/+0.3). Events are
selected in...
Dmitri Melikhov
(M. V. Lomonosov State University),
Dmitri Melikhov
(HEPHY)
20/07/2013, 11:20
Making use of dispersive QCD sum rules, we analyze the pseudoscalar meson–photon transition form factors. We show that most of the existing measurements – the BaBar results for eta, eta’, and eta_c and the Belle results for pi^0 – are well compatible with each other and with the saturation predicted by pQCD factorization theorems and give a hint that the saturation is effective already at...
Marco Panero
(University of Helsinki)
20/07/2013, 11:23
The phenomenon of jet quenching, related to the momentum broadening of a high-energy parton, provides important experimental evidence for the production of a strongly coupled, deconfined medium in heavy-ion collisions. Its theoretical description has been addressed in a number of works, both perturbatively and non-perturbatively (using the gauge-gravity duality). In this contribution,...
Maria Enrica Biagini
(INFN-Frascati National Laboratories)
20/07/2013, 11:25
The quest for high precision measurements in rare flavour decays requires dedicated colliders with very high peak luminosity and high operation reliability, in order to collect the huge amount of data needed. In the past such Factories were in operation at SLAC (USA) and KEK (Japan) for the study of the B meson decays, and are still collecting data at IHEP (China) at the Tau/charm energy and...
Steen Hannestad
(Aarhus University)
20/07/2013, 11:30
Cosmology is becoming an increasingly powerful laboratory for neutrino physics, with current observations providing stringent bounds on parameters such as the absolute neutrino mass and the cosmological neutrino energy density. I will outline the status of the field, and present new results, including an analysis of the Planck CMB measurements. I will also briefly discuss the future of the...
Lauren Alexandra Tompkins
(University of Chicago (US))
20/07/2013, 11:30
The compactification of the extra spatial dimensions in the Arkani-Hamed, Dimopoulos, and Dvali model results in a Kaluza-Klein tower of massive graviton modes. These graviton modes are produced in association with a jet or a photon and do not interact with the detectors, resulting in a monojet or a monophoton signature.
Asymmetric events with single object and large missing transverse...
Dr
Mark Peter Whitehead
(University of Warwick (GB))
20/07/2013, 11:30
Flavour Physics and Fundamental Symmetries
Talk presentation
The LHCb experiment is a general purpose forward spectrometer operating at the Large Hadron Collider, optimized for the study of B and D hadrons. LHCb has collected unprecedented large samples of B hadron decays to final states involving charmed hadrons. These decays offer many complementary measurements of CP violation and CKM matrix parameters, and serve as a laboratory for testing effective...
Min-Zu Wang
(Physics Department-National Taiwan University (NTU)-Unknown), Prof.
Min-Zu Wang
(National Taiwan Univ.)
20/07/2013, 11:35
Gudrid Moortgat-Pick
(Hamburg University (DE))
20/07/2013, 11:40
The impact of beam polarization (e- and e+) for the physics potential
of a LC will be discussed and weighted with regard to the expected LHC
prospects. In particular new examples in the different physics areas as in top physics as well as in electroweak physics (Z', heavy leptons, alternatives) will shortly be
discussed. In particular the new aspect of outlining the physics
potential...
Tommaso Lari
(University and INFN, Milano)
20/07/2013, 11:45
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 less than a few hundred GeV can also give rise to direct pair production rates at the LHC that can be observed in the data sample recorded by the ATLAS detector. The talk...
Luka Santelj
20/07/2013, 11:45
Flavour Physics and Fundamental Symmetries
Talk presentation
Using 772 million B meson pair decays recorded by the Belle detector at the KEKB collider, we study the time-dependent CP violation in the penguin transitions $b \to s q \bar{q}$, specifically in $B^0 \to \eta' K^0$. The $K^0$ mesons are reconstructed by either $K^0_S$ and $K^0_L$ and the possible deviation of the CP-violating parameter $\sin2\phi_1^{\rm eff}$ from the value found in the...
Michal P. Heller
(Universiteit van Amsterdam)
20/07/2013, 11:46
We numerically simulate planar shock wave collisions in anti-de Sitter space as a model for heavy ion collisions of large nuclei. We uncover a cross-over between two different dynamical regimes as a function of the collision energy. At low energies the shocks first stop and then explode in a manner approximately described by hydrodynamics, in close similarity with the Landau model. At high...
Felicitas Thorne
20/07/2013, 12:00
Flavour Physics and Fundamental Symmetries
Talk presentation
We report result of search for $B_s^0 \to D_{s0}^*(2317)^- \pi^+$ decay using a 121.4 fb$^{-1}$ data sample collected at the $\Upsilon(5S)$ resonance with the Belle detector at the KEKB asymmetric $e^+e^-$ collider.
Bill Gary
(University of California Riverside (US))
20/07/2013, 12:00
Graziano Venanzoni
(Istituto Nazionale Fisica Nucleare (IT))
20/07/2013, 12:00
We have recently completed and published
the third independent measurement of the e+e- --> pi+pi-(gamma)
cross section below 1 GeV, which is particularly important to
test the Standard Model calculation for the (g-2) of the muon,
where a long standing 3 sigma discrepancy is observed. The previous
measurements, with the photon emitted at small and large angle,
respectively, were...
Hongxuan Liu
(Baylor University (US))
20/07/2013, 12:00
In this talk, the latest results from CMS on direct stop pair production are reviewed. We present searches performed for different stop decay modes and final states using up to 20/fb of data from the 8 TeV LHC run of 2012.
Stefan Stricker
(TU Wien)
20/07/2013, 12:09
Understanding the process driving the complicated field dynamics during a relativistic heavy ion collision presents and exceptionally difficult problem, where
the early onset of hydrodynamical behaviour of the produced matter points towards the system being strongly coupled.
An important aspect concerns the thermalization pattern with which the plasma constituents of different energies...
Gioacchino Ranucci
(Istituto Nazionale di Fisica Nucleare)
20/07/2013, 12:10
The first phase of the Borexino experiment, currently running at the Laboratori del Gran Sasso in Italy, has been completed in 2010, and after a successful purification campaign which have further brought down the background levels, a second phase is now in progress. The final results of Phase I will be reported, as well as the first outcomes of Phase II, namely a new measurement of the...
Prof.
Philip Burrows
(Oxford University)
20/07/2013, 12:15
Future lepton colliders such as the International Linear Collider (ILC), and the Compact Linear Collider (CLIC) require nanometer-sized beams at the interaction point (IP). We report on the design, protoyping and testing of beam-based feedback systems for steering the beams into collision at the IP so as to maximise the luminosity performance of the colliders. Both all-analogue and digital...
Pablo Villanueva Perez
(Unknown-Unknown-Unknown)
20/07/2013, 12:15
Flavour Physics and Fundamental Symmetries
Talk presentation
We present the observation of Time-reversal
asymmetry as well as a selection of recent results on
CP violation effects in B-meson decays using a data set
of about 500 fb-1, collected at the peak of the Y(4S)
with the BABAR detector at SLAC.
They include the measurements of processes sensitive
to the angles of the Unitarity Triangle.
David Cote
(University of Texas at Arlington (US))
20/07/2013, 12:15
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. Real and virtual production of third generation squarks via decay of a gluino can be significant if the mass of the gluino does not exceed the TeV scale. The talk presents recent ATLAS results from searches for...
Dr
Nicolas Arnaud
(LAL (CNRS-IN2P3))
20/07/2013, 12:15
Andrej Liptaj
(Slovak Academy of Sciences (SK))
20/07/2013, 12:30
Covariant quark model is an ambitious model which is, inter alia, well suited for description of hadron decays. The model with its main features will be presented and then applied to describe some exclusive decays of the B_s meson. Results will be discussed in comparison with experimental data and other models.
Franco Simonetto
(Universita e INFN (IT))
20/07/2013, 12:30
Flavour Physics and Fundamental Symmetries
Talk presentation
We present the measurements of mixing-induced CP asymmetry in
semileptonic B-meson decays using the full data set collected
at the peak of the Y(4S), with the BABAR detector at SLAC.
The lepton charge directly identifies the B meson flavor in decays;
charged kaon is also used in tagging B meson flavor. Asymmetry
between B meson pairs decay as B0-B0 and B0bar-B0bar indicates
CP...
Keith Ulmer
(University of Colorado at Boulder (US))
20/07/2013, 12:30
In this talk, the latest results from CMS on searches for new physics in final states with four W bosons and multiple b-quarks are presented using up to 20/fb of data from the 8TeV LHC run of 2012. This final state is of special importance in the context of the search for third generation squarks in gluino or sbottom cascade decays. The four W final state is reconstructed in a variety of final...
Marek Schoenherr
(University of Durham (GB))
20/07/2013, 12:40
In this talk the application of the recently introduced methods to merge NLO calculations of successive jet multiplicities to the production of top pairs in association with jets will be discussed. Emphasis will be put on the achieved theoretical accuracy and the associated perturbative and non-perturbative error estimates. The production of a vector boson in association, constituting a main...
Yordan Ivanov Karadzhov
(Universite de Geneve (CH))
20/07/2013, 12:40
The Muon Ionisation Cooling Experiment (MICE) will demonstrate ionisation cooling, an essential technology for a Neutrino Factory and/or Muon Collider, by measuring a 10% reduction in emittance of a muon beam. A realistic demonstration requires beams closely resembling those expected at the front-end of a Neutrino Factory, i.e. with large transverse emittance and momentum spreads. The MICE...
Gudrid Moortgat-Pick
(Hamburg University (DE))
20/07/2013, 12:45
The recent discovery of a Higgs boson in the mass range of about
$m_H=126$~GeV has also an impact on further new physics searches.
Based on the recent LHC results and the currently still negative results for Supersymmetry or other beyond Standard Model Physics, one has to develop strategies for finding hints for new physics at future colliders.
Recently strong activities in Japan towards...
Mark Williams
20/07/2013, 12:45
Flavour Physics and Fundamental Symmetries
Talk presentation
We present results of the measurements of CP-violating parameters for a variety of b hadron species using the full Run 2 data set collected by the DØ detector. These include a new analysis testing for direct CP violation in B+ decays, and specific semileptonic charge asymmetries of B0s and B0 decays testing for CP violation in mixing.
Caterina Bloise
(Istituto Nazionale Fisica Nucleare (IT)),
Caterina Bloise
(Laboratori Nazionali di Frascati (LNF))
20/07/2013, 12:45
The V-->Pgamma Dalitz decays, associated to internal conversion
of the photon into a lepton pair, are not well described by the
Vector Meson Dominance (VMD) models, as in the case of the
process omega --> pi0 mu+ mu-, measured by the NA60 collaboration.
The only existing data on phi --> eta e+ e- come from the SND
experiment, which has measured the Mee invariant mass distribution...
Paris Sphicas
(CERN/Athens)
20/07/2013, 14:30
Tatsuya Nakada
(Ecole Polytechnique Federale de Lausanne (CH))
20/07/2013, 14:50
Sachio Komamimya
(Tokyo)
20/07/2013, 15:50
Andrew James Lankford
(University of California Irvine (US)),
Andrew James Lankford
(University of California Irvine (US))
20/07/2013, 16:50
Andre Rubbia
(Eidgenoessische Tech. Hochschule Zuerich (CH))
20/07/2013, 17:20
Leonid Rivkin
(Paul Scherrer Institute & EPFL)
20/07/2013, 17:50
Bengt Lund-Jensen
(KTH Royal Institute of Technology (SE)), Dr
David Milstead
(Stockholm University)
22/07/2013, 09:00
Anders Karlhede
(Stockholm University)
22/07/2013, 09:04
Leif Kari
(KTH)
22/07/2013, 09:12
Greg Landsberg
(Brown University (US))
22/07/2013, 11:30
Fabio Cerutti
(Lawrence Berkeley National Lab. (US))
22/07/2013, 12:00
Christophe Grojean
(ICREA/IFAE and CERN)
22/07/2013, 12:30
Daniel de Florian
(Universidad de Buenos Aires)
22/07/2013, 14:30
Sara Kristina Strandberg
(Stockholm University (SE))
22/07/2013, 15:30
Silvia Masciocchi
(GSI Darmstadt (DE))
22/07/2013, 17:00
Laura Baudis
(University of Zurich)
23/07/2013, 09:30
Prof.
Christopher Sachrajda
(University of Southampton)
23/07/2013, 12:30
Yifang Wang
(IHEP Beijing)
23/07/2013, 16:30
Atsuko Ichikawa
(Kyoto)
23/07/2013, 17:00
Stephanie Hansmann-Menzemer
(Heidelberg)
24/07/2013, 10:00
Fabienne Ledroit
(LPSC Grenoble)
24/07/2013, 12:05
Ultrarelativistic Heavy Ions
Poster Presentation
The relativistic heavy-ion collisions at RHIC in Brookhaven National Laboratory allow to produce a hot and dense nuclear matter - the Quark-Gluon Plasma (QGP). During the initial phase of the collision, enough energy is released from the hard scattering to produce the heavy quarks such as charm and bottom. The measurement of the production of mesons containing heavy quarks, such as $D^0$, in...
Detector R&D and data handling
Poster Presentation
The Large Hadron Electron Collider (LHeC) is a proposed facility which will exploit the LHC beams for electron-proton/nucleus scattering, using a new 60 GeV electron accelerator. A detector concept is presented for the measurement of precision deep inelastic scattering phenomena including the reconstruction of Higgs decay final states with maximum acceptance. An overview is also given on the...
Cosmology and Gravity
Poster Presentation
We propose an extension of the standard model in which dark sector respects an unbroken local U(1) symmetry and communicates with standard model sector via portal interactions of Higgs and right-handed neutrinos as well as kinetic mixing. Various constraints and physics involved in the model are discussed.
Gilles Geoffrey
Top and Electroweak Physics
Poster Presentation
Many theoretical approaches beyond the Standard Model involve enhanced symmetries that
introduce new charged vector current carried by new heavy gauge boson, usually called W′. This
poster presents a search of the W′ boson, decaying to a top and a b quark in an effective
coupling approach. It reports preliminary exclusion limits on the W ′ → tb cross section times
branching ratio as a...
Chun-Khiang Chua
Astroparticle Physics
Poster Presentation
We study pure weak eigenstate Dirac fermionic dark matters (DM). We consider WIMP with renormalizable interaction. According to results of direct searches and the nature of DM (electrical neutral and being a pure weak eigenstate), the quantum number of DM is determined to be $T_3=Y=0$. There are only two possible cases: either DM has non-vanishing weak isospin ($T\neq 0$) or it is an...
Jordi Duarte Campderros
(I)
Detector R&D and data handling
Poster Presentation
The CMS Muon system consists of 250 drift tube chambers in central region and 468 cathode strip chambers in forward region complimented by trigger system consisting of 480 resistive plate chambers distributed in both regions. The muon system provides fast muon trigger, muon identification, and muon trajectory measurements. The performance of the muon system depends on a precise knowledge of...
Lars Andreas Dal
(University of Oslo)
Astroparticle Physics
Poster Presentation
The antideuteron channel is currently one of the most promising channels for indirect detection of dark matter.
The coalescence model of antideuteron production is strongly dependent on two-particle correlations in each DM annihilation or decay event,
and the hadronization scheme chosen when generating Monte Carlo events could therefore have a profound effect on the predicted antideuteron...
Mr
Benedikt Vormwald
(DESY)
Higgs and New Physics
Poster Presentation
Supersymmetry with bilinearly broken R-parity (bRPV) offers an attractive
alternative to R-parity conserved SUSY. With broken R-parity the lightest SUSY
particle is no longer stable and can decay into Standard Model particles. The
additional new bRPV terms in the Lagrangian introduce a mixing of the neutrino
and the neutralino sector, which can account for the current...
Detector R&D and data handling
Poster Presentation
MWPCs served well for HEP experiments for decades, even with their basic drawbacks, like massive support frames and the need for high precision cathode flatness. Close Cathode Chambers are asymmetric wire chambers, where these constraints are eliminated with appropriate voltages on the alternate anode and field shaping wires. In this configuration the wires can be placed close to the segmented...
Detector R&D and data handling
Poster Presentation
Scintillator based time-of-flight systems may reach excellent time
resolution, by using fast scintillators and fast photomultipliers.
Examples are the large time-of-flight system constructed for the HARP
experiment at CERN PS (~150 ps intrinsic time resolution) or the most demanding time-of-flight system of the MICE experiment at RAL (~50 ps resolution). This level of timing resolutions...
Prof.
Antonio Maroto
(Universidad Complutense de Madrid, Spain),
Jose A. R. Cembranos
(Universidad Complutense de Madrid), Ms
Viviana Gammald
(Universidad Complutense de Madrid, Spain)
Astroparticle Physics
Poster Presentation
The gamma-ray fluxes observed by the High Energy Stereoscopic System (HESS) from the J1745-290 Galactic Center source is well fitted by the secondary photons coming from dark matter (DM) annihilation in particle-antiparticle standard model pairs over a diffuse power-law background. The spectral features of the signal are consistent with different channels: light quarks, electro-weak gauge...
Roberto Castello
(Universite Catholique de Louvain (BE))
Detector R&D and data handling
Poster Presentation
During the first 3 years of operation at the Large Hadron Collider, the Compact Muon Solenoid (CMS) experiment has collected data across evolving conditions of center of mass energy; instantaneous luminosity and collisions pile up. Following this evolution, the CMS collaboration has constantly strived to guarantee the prompt availability of high quality reconstructed data, in order to ensure...
Daniele Trocino
(Northeastern University (US))
Detector R&D and data handling
Poster Presentation
The performance of muon reconstruction and identification in CMS has been studied on data collected in pp collisions at √s = 7 TeV and 8 TeV at the LHC. We present measurements of muon reconstruction and trigger efficiencies, fake rates, and momentum scale and resolution, and discuss methods developed to differentiate prompt isolated muons from non-prompt, cosmic, and beam-halo muons.
James Saxon
(University of Pennsylvania (US))
Higgs and New Physics
Poster Presentation
Recent results in the bosonic decay modes have confirmed Higgs-like properties of the boson discovered in 2012 by the ATLAS and CMS collaborations. Measurements of the kinematic properties of the Higgs decay products and their correlations shed further light on its production and decay. With the 20/fb dataset collected in 2012, and the high selection efficiency, the diphoton decay channel is...
Ultrarelativistic Heavy Ions
Talk presentation
The unprecedented centre-of-mass energy available at the LHC offers unique opportunities for studying the properties of the strongly-interacting QCD matter at extreme temperatures and energy density. With its high precision and large acceptance for charged-particle tracking, calorimetry, and muon detection, CMS is fully equipped to measure (di-)muons in the high multiplicity environment of...
Sanjoy Biswas
(INFN, Sezione di Roma, Italy)
Higgs and New Physics
Poster Presentation
In order to directly constrain the top-Higgs coupling, the Higgs-top associated production is reanalyzed. Thanks to the strong destructive interference in the t-channel for standard model couplings, this process can be very sensitive to both the magnitude and the sign of a non-standard top-Higgs coupling. We project the sensitivity to anomalous couplings to the integrated luminosity of 50...
Flavour Physics and Fundamental Symmetries
Poster Presentation
QED with magnetic monopoles gives Maxwell’s equations with dual symmetry and leads to the quantization of electric charge. However the transformation of parity P and time inversion T are no longer the symmetries of theory. Also the CP transformation is broken. The symmetry is restored for PT and CPT transformations . These conclusions follow from the classical Maxwell’s equations and the...
Chiu-Ping Chang
(National Central University (TW)),
Shih-Yen Tseng
(National Central University (TW))
Detector R&D and data handling
Poster Presentation
The Preshower detector is located in front of the CMS endcap electromagnetic calorimeter. It is a sampling detector with two layers of lead absorber, each followed by 1.9 mm pitch silicon strip sensors. The 4288 DC-coupled sensors each have an active area of 61 x 61 mm^2, with a total surface area of around 16 m^2, the largest ever built. The Preshower was installed to improve γ/pi0...
Top and Electroweak Physics
Talk presentation
Exclusive J/ψ and ψ(2S) vector meson production has been observed in the
dimuon channel using the LHCb detector. The cross-section times branching fractions to two muons with pseudorapidities between 2.0 and 4.5 are measured and are found to be in good agreement with results from previous experiments and theoretical predictions. The J/ψ photoproduction cross-section is reported as a function...
Ultrarelativistic Heavy Ions
Poster Presentation
We shall discuss a possibility to study
the $\gamma\gamma\to\pi\pi$ processes
in ultrarelativistic ultraperipheral heavy ion collisions.
The $\gamma\gamma\to\pi\pi$ reactions are
more complicated than commonly believed. We shall
present an approach which takes into account many
mechanisms not included so far in the literature.
We shall also present how our approach describes
world...
Gabriele Benelli
Top and Electroweak Physics
Poster Presentation
We present the first measurement of single top quark production in the tW-channel in pp collisions, in which a top quark is produced in association with a W boson. The data are collected in 2011 at a centre-of-mass energy of 7 TeV. The experimental signature is similar to top pair production, and there is interference at higher orders between the two processes. The measurement is perfomed...
Antonio Surdo
(INFN)
Astroparticle Physics
Poster Presentation
The ARGO-YBJ detector layout, features and location at high altitude (about 600 g/cm2 of atmospheric depth) offer a unique chance for a detailed study of several characteristics of the hadronic component of the Cosmic Rays in the 10^12-10^15 eV energy range. Indeed, the analog readout of the RPC signals provides a powerful tool to study, with unprecedented resolution, the distribution of the...
Glenn Wouda
(U)
Higgs and New Physics
Poster Presentation
In this talk, I would like to present a model with two scalar doublets with a softly broken Z2 symmetry is presented. In this model, one of them acquire a vacuum expectation value (vev) and breaks the electroweak symmetry. The other doublet, which is fermiophobic, has no vev. Because of the breaking of the Z2 symmetry, the model can lead to a distinct and novel phenomenology. For instance, the...
Ivan Marchesini
(Hamburg University (DE))
Flavour Physics and Fundamental Symmetries
Poster Presentation
The CMS experiment investigates high-energetic proton-proton collisions at the LHC, in order to broaden the knowledge of the Standard Model (SM) of particle physics and to discover possible new physics beyond the SM.
A large fraction of the CMS physics program relies on the identification of jets containing the decay of a B hadron (b jets). The b jets can be discriminated from jets produced...
Ultrarelativistic Heavy Ions
Poster Presentation
Extensive studies of properties of quark-gluon plasma (QGP), the partonic matter created in heavy ion collisions, have been conducted at RHIC for over a decade. Suppression of quarkonia production in high energy nuclear collisions relative to proton-proton collisions, due to Debye screening of the quark-antiquark potential, has been predicted to be a sensitive indicator of the temperature of...
Detector R&D and data handling
Poster Presentation
Micromegas (MICRO MEsh GAS detectors) are high-rate capable, high resolution micro pattern gas detectors. Resistive strip Micromegas with square meters in area are foreseen as replacement of the
precision chambers in the small wheel part of the ATLAS muon spectrometer. The resistive material in the active area suppresses the effects of discharges.
As a novel approach a Micromegas with...
Dr
Valery Lyuboshitz
(Joint Institute for Nuclear Research ( Dubna ))
Neutrino Physics
Poster Presentation
The lepton-charge ( L_e, L_{\mu}, L_{\tau}) nonconserving interaction leads to the mixing of the electron, muon and tau neutrinos, which manifests itself in spatial oscillations of a neutrino beam, and also to the mixing of the electron, negative muon and tau lepton – which, in particular, may be the cause of the "forbidden" radiative decay of the negative muon into the electron and \gamma...
Tyler Dorland
Top and Electroweak Physics
Poster Presentation
Normalised differential top-quark pair production cross sections are measured in pp collisions at 8 TeV using the decay channels into two opposite-sign leptons (muons or electrons). The analysed dataset was recorded in 2012 and corresponds to an integrated luminosity of 12.2/fb. The tt cross section is measured differentially as a function of kinematic observables of the final state leptons,...
Joern Lange
Top and Electroweak Physics
Poster Presentation
Normalised differential top-quark-pair (tt) production cross sections are measured in pp collisions at 7 and 8 TeV centre-of-mass energy with the CMS detector. Such distributions constitute a test of perturbative QCD at high energy scales and can help to constrain QCD parameters like parton distribution functions. Moreover, they can provide an improved description of tt background...
Karl-Johan Grahn
Top and Electroweak Physics
Poster Presentation
Properties of jets, including jet multiplicity, are measured with the ATLAS detector in
semileptonic
ttbar events in protonproton
collisions at a centerofmass
energy of 7 TeV. After
background subtraction, corrections are made for detector efficiencies and
resolution effects. The results are compared to Monte Carlo models, consisting of fixedorder
matrix element calculations matched to...
Raquel Castillo
(IFAE)
Neutrino Physics
Poster Presentation
The T2K collaboration presents the selection of muon neutrino charged current events using near detector (ND280) data at J-PARC (Tokai). Events are inclusively selected for the presence of a muon candidate, and then divided into three categories according to the presence of additional pion and electron candidates. The categories resemble the event topologies of the three dominant cross...
Davide Sgalaberna
(Eidgenoessische Tech. Hochschule Zuerich (CH))
Neutrino Physics
Poster Presentation
The main physics goal of the T2K experiment is the measurement of PMNS mixing angle theta_13 through the observation of nu_e appearance in the nu_mu neutrino beam. The main background to this measurement is the intrinsic nu_e beam component that has to be measured before the oscillation at the T2K Near Detector (ND280). We select neutrino interactions in the Fine Grained Detector (FGD) and...
Jelena Jovicevic
(KTH Royal Institute of Technology (SE))
Higgs and New Physics
Poster Presentation
This poster presents the results of the measurements of the Higgs boson in the $H \rightarrow WW^{(\ast)} \rightarrow \ell \nu \ell \nu$ decay mode using the ATLAS detector at the CERN Large Hadron Collider. The results are obtained using the proton-proton collisions dataset which corresponds to an integrated luminosity of 20.7 fb$^{-1}$ at centre of mass energy of 8 TeV and 4.6 fb$^{-1}$ at 7...
Adrien Caudron
Top and Electroweak Physics
Poster Presentation
The production of a Z boson, decaying into two leptons, and produced in association with one or more b jets, have been studied using proton-proton collisions delivered by the LHC at a centre-of-mass energy of 7 TeV and recorded by the CMS detector, with a data sample collected in 2011 corresponding to an integrated luminosity of 5 /fb. Cross sections of the Z(ll)+b-jet(s) processes (where ll =...
Maria Martin
Top and Electroweak Physics
Poster Presentation
Jet multiplicity distributions in top-quark pair (ttbar) events are measured with the CMS detector. The measurement is performed in the dilepton and lepton+jets decay channels of the top-quark pairs. The normalised differential ttbar quark cross section is measured as a function of the jet multiplicity for different transverse momentum (pT) thresholds. Furthermore, the distribution of the...
Flavour Physics and Fundamental Symmetries
Poster Presentation
The extension of the adjoint SU(5) model with a flavour symmetry based
on Z_4 group is investigated. The Z_4 symmetry is introduced with the
aim to lead the up- and down-quark mass matrices in the
Nearest-Neighbour-Interaction form. As consequence of the discrete
symmetry embedded in the SU(5) gauge group the charged lepton mass
matrix also gets the same form. Within this model, light...
Andrej Liptaj
(Slovak Academy of Sciences (SK))
Flavour Physics and Fundamental Symmetries
Poster Presentation
By the analysis of the pion scalar form factor together with all existing data on the S-wave iso-scalar \pi\pi phase shift in the elastic region the f_0(600) and f_0(980) scalar meson parameters in a model independent way are determined.
Jenny List
(Deutsches Elektronen-Synchrotron (DE))
Higgs and New Physics
Poster Presentation
We investigate the prospects for detecting and measuring the parameters of WIMP
dark matter in a model-independent way at the International Linear Collider.
The signal under study is direct WIMP pair production with associated initial
state radiation e+e− -> chi chi gamma. The analysis accounts for the beam
energy spectrum of the ILC and the dominant machine-induced backgrounds. ...
Hale Sert
(DESY)
Higgs and New Physics
Poster Presentation
In unconstrained SUSY models, the most natural value for the mu parameter is
not far from the Z^0 mass, predicting the lightest gauginos to be higgsino-like
and nearly degenerate in mass, with mass splittings of a few GeV or even of
less than a GeV. At the ILC, chi_1^0 chi_2^0 and chi_1^+ chi_1^- production
can be detected via the recoil against hard photon radiation and even...
Branislav Vlahovic
(N)
Cosmology and Gravity
Poster Presentation
The paradigm of LambdaCDM cosmology works impressively well and with the concept of inflation it explains the universe after the time of decoupling. However, there are still a few concerns; after much effort there is no detection of dark matter and there are significant problems in the theoretical description of dark energy. We will consider a variant of the cosmological spherical shell model,...
Max Klein
(University of Liverpool (GB))
Higgs and New Physics
Poster Presentation
The Large Hadron Electron Collider (LHeC) is a proposed facility which will exploit the new world of energy and intensity offered by the LHC through collisions with a new 60 GeV electron beam. The LHeC has an important potential for the search for new physics, as for RPV SUSY or substructure, and to accompany possible findings of new particles or phenomena at the LHC, such as SUSY or the onset...
Kazuyoshi Kitazawa
Astroparticle Physics
Poster Presentation
In preceding papers the mass, structure 1) of SM Higgs boson (H$^{0}$) and the relation 2) between the calculated mass (120.611 GeV/c$^{2}$) and recent results of LHC were discussed. There the corrected mass of Higgs boson by replacing the masses of consisting mesons with the ones of their 1st excited (or upper-resonant) states respectively, was at 125.28 GeV/c$^{2}$ which met the latest...
Dr
Valery Lyuboshitz
(Joint Institute for Nuclear Research ( Dubna ))
QCD
Poster Presentation
The phenomenological structure of inclusive cross-sections of the
production of two neutral K mesons in hadron--hadron, hadron--nucleus
and nucleus--nucleus collisions is investigated taking into account the
strangeness conservation in strong and electromagnetic
interactions. Relations describing the dependence
of the correlations of two short-lived and two long-lived neutral...
Detector R&D and data handling
Poster Presentation
The ATLAS experiment is designed to study the proton-proton collisions produced at the Large Hadron Collider (LHC) at CERN. The ATLAS electromagnetic calorimetry consists in liquid argon-lead sampling calorimeters covering the pseudo-rapidity region up to 3.2. They are characterized by an accordion geometry that allows a fast and uniform azimuthal response without any gap. Since the first LHC...
Detector R&D and data handling
Poster Presentation
The size and complexity of the ATLAS experiment at the Large Hadron Collider, including its Muon Spectrometer, raise unprecedented challenges in terms of operation, software model and data management. One of the challenging tasks is the storage of non-event data produced by the calibration and alignment stream processes and by online and offline monitoring frameworks, which can unveil problems...
Javier Rico
(IFAE),
Jelena Aleksic
(IFAE),
Manel Martinez
(IFAE)
Astroparticle Physics
Poster Presentation
We describe a dedicated analysis approach for indirect Dark Matter searches with Imaging Air Cherenkov Telescopes. By using the full likelihood analysis, we take complete advantage of the distinct features expected in the gamma ray spectrum of Dark Matter origin, achieving better sensitivity with respect to the standard analysis chains. We describe the method and characterize its general...
Flavour Physics and Fundamental Symmetries
Poster Presentation
Precision measurement of the ultra-rare $K^+\to\pi^+\nu \bar\nu$ decay at Fermilab would be one of the most incisive probes of quark flavor physics this decade. Its dramatic reach for uncovering new physics is due to several important factors: The branching ratio is sensitive to most new physics models which extend the Standard Model to solve its considerable problems. The Standard Model...
Detector R&D and data handling
Poster Presentation
Micromegas is one of the detector technologies that have been chosen for precision tracking and trigger purposes for the upgrade of the forward muon detectors of the ATLAS experiment in view of the LHC luminosity increase. We present a survey of the detector
performances obtained in recent test beam campaigns with high energy particle beams. Results on spatial and angular resolution for...
Elena Zemlyanichkina
(Joint Inst. for Nuclear Research (RU))
QCD
Poster Presentation
The spin structure of the nucleon including the Parton Distribution Functions (PDFs) is an important subject studied by the COMPASS experiment at CERN (SPS). The transverse momentum dependent parton distribution functions (TMD PDFs) of the proton and deuteron from Semi-Inclusive Deep Inelastic Scattering (SIDIS) have been studied so far. The Drell-Yan (DY) process is a complementary way to...
Dr
Frank Simon
(Max-Planck-Institut fuer Physik)
Higgs and New Physics
Poster Presentation
There is a general agreement that the SM does not provide a complete description of particle physics. Collisions at the energy frontier, as well as precision measurements of fundamental observables, have the possibility to shed light on the nature of New Physics (NP). New input is therefore expected from upcoming high-energy and high-luminosity LHC data. The preparation for future projects at...
Annika Vauth
(D)
Accelerators
Poster Presentation
The physics program of the International Linear Collider requires the knowledge of the luminosity weighted average polarisation at the electron-positron collision point with a yet unprecedented precision of 0.25% or better. Crucial ingredients to reach this goal are fast and precise Laser-Compton-Polarimeters measuring before and behind the collision point as well as the understanding of the...
Katarina Lipka
Top and Electroweak Physics
Poster Presentation
The measurements of top quark pair inclusive and differential cross sections cross sections are compared with different higher-order QCD predictions. Among other studies, the data allow for tests and determinations of QCD-parameters, such as those related to the scales for renormalization and factorization and for the matching between the matrix-element and parton-shower level. The top-quark...
Davide Sgalaberna
(Eidgenoessische Tech. Hochschule Zuerich (CH))
Neutrino Physics
Poster Presentation
Several anomalies in neutrino experiments could be explained assuming the existence of new sterile neutrinos. These hypothetical right-handed neutrinos, with a mass at the eV scale, don’t interact but participate in mixing with the three SM active flavor neutrinos. We present a study of the nu_e component in the T2K beam using the data of the near detector ND280, located at 280m from the...
Yordan Ivanov Karadzhov
(Universite de Geneve (CH))
Accelerators
Poster Presentation
The Muon Ionisation Cooling Experiment (MICE) based at the Rutherford Appleton Laboratory aims to demonstrate 10% ionisation cooling of a beam of muons by its interaction with low Z absorber materials followed by restoration of longitudinal momentum in RF linacs.
Extensions to the apparatus required to achieve STEP IV, including the first absorber cell, of either liquid hydrogen or...
Christophe Ochando
(Ecole Polytechnique (FR))
Higgs and New Physics
Poster Presentation
On 2012 July 4th, the CMS and ATLAS experiments reported the discovery of a new boson. The measurement of its properties is now of prime interest to determine whether it's the Standard Model (SM) Higgs or not. In the X->ZZ->4 leptons (electrons or muons) channel, the final state can be fully reconstructed and with high precision, thanks to the excellent performances of the CMS detector. It...
Dag Gillberg
(CERN)
Higgs and New Physics
Poster Presentation
The discovery of a particle consistent with a Higgs Boson is a great success for the LHC Physics Program. With a dataset more than doubled since the discovery, ATLAS have established the excess of this new particle over background at a significance of 7 standard deviations in the diphoton channel alone. In this poster, we present measurements of the mass, spin, and couplings of the new...
Karim Louedec
(LPSC, CNRS/IN2P3, UJF-INPG)
Astroparticle Physics
Poster Presentation
The Pierre Auger collaboration is exploring the potential of radio-detection techniques to measure the extensive air showers induced by ultra-high energy cosmic rays. The main advantages of these setups are no atmospheric attenuation and the possibility to cover a large area with 100% duty cycle. Radio-emission in the MHz range is recorded by the Auger Engineering Radio Array (AERA), presently...
David Hadley
(University of Warwick)
Neutrino Physics
Poster Presentation
The Tokai to Kamioka (T2K) experiment is a long baseline neutrino oscillation experiment situated in Japan. A high intensity neutrino beam is produced at the Japan Proton Accelerator Research Complex, in Tokai, Japan. The near detector of the T2K experiment is designed to provide a good knowledge of the neutrino beam before the neutrinos oscillate, including measuring the backgrounds and...
Michele Gabusi
(Universita e INFN (IT))
Higgs and New Physics
Poster Presentation
A search for top quark decays that violate baryon number conservation is performed using pp collisions produced by the LHC at sqrts=8 TeV. The top quark decay would in this scenario produce one lepton (either a muon or an electron), two jets and no missing transverse energy. Data are collected using the CMS detector and correspond to an integrated luminosity of 19.6 fb-1. Two event selections,...
Sudeshna Banerjee
(Tata Inst. of Fundamental Research (IN))
Higgs and New Physics
Poster Presentation
Results on a search for charged massive long-lived particles (CMLLPs) that are pair produced in p-pbar collisions at sqrt(s)= 1.96 TeV will be presented. The search uses data collected by the D0 experiment at the Fermilab Tevatron collider. This result is a combination of two searches where either one or both CMLLPs are reconstructed in the detector. Events are selected with muon-like...
Shingo Kazama
(University of Tokyo (JP))
Higgs and New Physics
Poster Presentation
A search for direct chargino production in anomaly-mediated supersymmetry breaking scenarios is performed in pp collisions at sqrt(s)=8 TeV with the ATLAS detector. The analysis explores the models by searching for decaying charginos based on a disappearing-track signature. The result using an improved track reconstruction with respect to earlier instances of this search and an integrated...
Tommaso Lari
(University and INFN, Milano)
Higgs and New Physics
Poster Presentation
We report on a search for pair production of the scalar partners of bottom and top quarks in 20.3 fb-1 of pp collisions at a centre-of-mass energy of 8 TeV using the ATLAS experiment. The study focuses on final states with large missing transverse momentum, no leptons (electrons or muons) and two jets identified as originating from a b-quark. This final state can be produced in a R-parity...
Yu Bai
(Chinese Academy of Sciences (CN))
Higgs and New Physics
Poster Presentation
Results of a search for the production of weakly coupled supersymmetric particles decaying into final states with at least two hadronically decaying taus and missing transverse momentum are presented. The analysis uses the complete 2012 data sample of 8 TeV proton-proton collisions recorded with the ATLAS detector at the CERN Large Hadron Collider, corresponding to a total integrated...
Janet Dietrich
(Deutsches Elektronen-Synchrotron (DE))
Higgs and New Physics
Poster Presentation
Abstract: The poster presents a search for supersymmetric particles decaying to final states with missing transverse momentum and exactly two isolated leptons. The search uses the complete 2012 data sample corresponding to an integrated luminosity of 20.3 fb-1 collected by the ATLAS experiment in 2012.
Presenter: Janet Dietrich (DESY)
Shilpi Jain
(Saha Institute of Nuclear Physics (IN))
Higgs and New Physics
Poster Presentation
In this poster, a search for compositeness in electrons and muons carried out with the CMS detector in pp collision at the LHC at sqrt{s}=7 TeV with 5.0 fb-1 of data, is presented. The search has been performed for an associated production of a lepton and an oppositely charged excited lepton pp->ll* followed by the decay l*->l+gamma resulting in the ll+gamma final state, where l=e,mu. This...
Antonio Policicchio
(INFN Cosenza)
Higgs and New Physics
Poster Presentation
Various models of new physics beyond the standard model predict the existence of long-lived particles decaying far from the interaction point to collimated jets of leptons or hadrons. Results are presented on the searches of these long-lived particles in the context of exotics models with the ATLAS detector, based on the LHC collision events data collected during 2011/2012.
Jeanette Miriam Lorenz
(Ludwig-Maximilians-Univ. Muenchen (DE))
Higgs and New Physics
Poster Presentation
This poster presents the latest results in a search for gluinos and squarks in final states with one isolated electron or muon, jets and missing transverse momentum. The search is based on the full 2012 dataset corresponding to an integrated luminosity of 20.3 fb-1 taken at sqrt(s) = 8 TeV pp collisions by the ATLAS detector at the LHC.
Presenter: Jeanette Miriam Lorenz (LMU)
Mark Olschewski
(Rheinisch-Westfaelische Tech. Hoch. (DE))
Higgs and New Physics
Poster Presentation
A search for new physics in final states with an electron or a muon and a low mass neutrino is presented based on the full 2012 data set at sqrt(s)=8TeV. The analysis searches for an excess of events above the SM expectation in the l+MET transverse mass spectrum. The results are interpreted in several different models, such as a new, heavy SM-like boson W' with and without interference with...
Roger Caminal Armadans
(IFAE - Barcelona (ES))
Higgs and New Physics
Poster Presentation
This poster presents the search for direct scalar top production in the decay channel stop->charm+neutralino using 20.3 fb-1 of proton-proton collisions at sqrt(s) = 8 TeV recorded by the ATLAS experiment at LHC. The analysis is performed in different signal regions with different thresholds in Etmiss, Pt of the leading jet and jet multiplicities. Some of the signal regions use explicit...
Judita Mamuzic
(INN "Vinca", Belgrade (RS)),
Valerio Consorti
(Albert-Ludwigs-Universitaet Freiburg (DE))
Higgs and New Physics
Poster Presentation
This poster presents a search for squarks and gluinos in final states containing jets, missing transverse momentum and no high-pt electrons or muons. The data were recorded in 2012 by the ATLAS experiment in sqrt(s)=8 TeV proton-proton collisions at the Large Hadron Collider, with a total integrated luminosity of 20.3 fb-1. Results are interpreted in a number of supersymmetric...
Orjan Dale
(University of Bergen (NO))
Higgs and New Physics
Poster Presentation
This poster presents a search for supersymmetry in events with large missing transverse momentum, jets, at least one hadronically decaying tau lepton and no light leptons (e/mu) using 20.7 1 fb-1 of proton-proton collision data at the center-of-mass energy of 8 TeV recorded with the ATLAS detector at the LHC. Searches with tau leptons are of interest due to the enhanced branching ratio into...
Christian Autermann
(Rheinisch-Westfaelische Tech. Hoch. (DE))
Higgs and New Physics
Poster Presentation
In this talk, the latest results from CMS on searches for Supersymmetry with GMSB in final states with photons and leptons are presented using up to 20/fb of data from the 8 TeV LHC run of 2012. The experimental results are interpreted in terms of weak as well as strong production of SUSY particles, followed by cascade decays to a Gravitino as lightest supersymmetric particle.
Ljiljana Morvaj
(Nagoya University (JP))
Higgs and New Physics
Poster Presentation
Supersymmetric scenarios characterized by a compressed sparticle spectrum represent an experimental challenge as they could be missed in inclusive searches. This poster describes a dedicated search for models of this kind in final states with a soft-lepton, jets and missing transverse momentum using an integrated luminosity of 20.3 fb-1 at sqrt(s)=8TeV with the ATLAS detector.
Presenter...
Mr
Nadir Daci
(Ecole Polytechnique (FR))
Higgs and New Physics
Poster Presentation
In order to confirm that the new heavy boson discovered in 2012 is the Standard Model Higgs boson, its coupling to fermions must be measured. The CMS collaboration used all the data recorded in 2011 (4.9 /fb) and 2012 (19.1 /fb) from LHC pp collisions at 7 and 8 TeV respectively to perform searches for the Higgs boson decaying to tau pairs : this is the only analysis able to check the coupling...
Prof.
Thomas Muller
(KIT - Karlsruhe Institute of Technology (DE)),
Thomas Muller
(KIT - Karlsruhe Institute of Technology (DE))
Higgs and New Physics
Poster Presentation
The search for the Higgs boson decaying into taus is presented. The focus is on same-flavoured leptonic decay modes of the taus (H->tautau->ll where ll=ee,mumu). Due to the small branching fraction of tau pairs decaying into pairs of same-flavour leptons and the large Z->ll background contamination, sophisticated background suppression methods are required that differ from the analyses in the...
Lucia Perrini
(Universite Catholique de Louvain (BE))
Higgs and New Physics
Poster Presentation
A search for the standard model Higgs boson produced in association with a W or Z boson is presented using data collected in 2011 and 2012 with the CMS detector at the LHC. The topologies studied have three or four leptons final states. The Higgs boson decay channel analysed is the ditau one where the tau can decay via an electron, a muon or hadronically. The W and Z boson decays used to...
Chia-Ming Kuo
(National Central University (TW))
Higgs and New Physics
Poster Presentation
The most recent CMS results on the search for the Standard Model Higgs boson in the photon plus Z decay channel, using the full dataset recorded at the LHC from pp collisions at centre of mass energies of 7 and 8 TeV, will be presented. Extreme models for new physics can be excluded.
Leonid Serkin
(Georg-August-Universitaet Goettingen (DE))
Higgs and New Physics
Poster Presentation
A search for a 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 kinematic reconstruction of the ttH topology is performed in the signal enhanced...
Manuel Proissl
(University of Edinburgh (GB))
Higgs and New Physics
Poster Presentation
A new neutral boson decaying into pairs of photons, W bosons and Z bosons with an invariant mass of 125 GeV has been observed and requires confirmation of its coupling to fermions in order to determine whether it is the Standard Model Higgs boson. A vital observation would be its decay into b quark pairs. This poster presents an updated direct search with the ATLAS experiment for a Standard...
Yuan Chao
Top and Electroweak Physics
Poster Presentation
We present a search for top quark flavor-changing neutral-current (FCNC) decays by the CMS Experiment. The data correspond to an integrated luminosity of 19.5 fb−1 collected in proton proton collisions at the LHC at a centre-of-mass energy √s = 8 TeV. The analysis uses background estimation techniques that are improved with respect to previous measurements. An upper limit for the branching...
Ben Nachman
(SLAC National Accelerator Laboratory (US))
Higgs and New Physics
Poster Presentation
This poster presents the latest results of a search for top squark pair production in final states with one isolated lepton, jets, and missing transverse momentum in sqrt(s)=8 TeV pp collisions using 20.7 fb-1 of ATLAS data. Two top squark decay scenarios are considered: (a) to a top quark and a stable undetected neutral particle (LSP), (b) to a bottom quark and a chargino, where the chargino...
Sebastien Brochet
(Universite Claude Bernard-Lyon I (FR))
Top and Electroweak Physics
Poster Presentation
We present a search for the production of heavy resonances decaying into top-antitop quark pairs at the CMS Experiment. The data correspond to an integrated luminosity of 19.6 fb−1 at √s = 8 TeV. We consider all events containing one muon or electron and at least two jets in the final state. We present results from the search optimized for tt production close to the kinematic production threshold.
Sanmay Ganguly
(Tata Inst. of Fundamental Research (IN))
Higgs and New Physics
Poster Presentation
A search for the Standard Model Higgs in decay mode H → ZZ → l + l − τ + τ − , where l = μ, e is presented based on CMS data corresponding to an integrated luminosity of ~25 fb-1 (combined 2011,2012 data). Hadronic and leptonic decays of τ are inspected, giving total eight final states which include all lepton flavours: e, μ and τ. No evidence is found for a significant deviation from standard...
Elisa Musto
(Israel Institute of Technology (IL))
Higgs and New Physics
Poster Presentation
A search for long-lived particles is presented using the full 2012 data sample from proton-proton collisions at a centre-of-mass energy sqrt(s) = 8 TeV recorded by the ATLAS detector at the LHC. Long-lived sleptons and R-hadrons are searched for in different scenarios, based on their possible interactions in the inner detector, the calorimeters and the muon spectrometer.
Samuel Ross Meehan
(University of Chicago (US))
Higgs and New Physics
Poster Presentation
Using data collected at a center of mass energy of 8 TeV with the ATLAS detector, an investigation has been made of the semi-leptonic decay channel involving Z Z and Z W boson pairs in which there is a leptonic Z → f+f− decay in the final state. Processes involving pairs of bosons in the final state play an important role in a wide range of measurements and searches at the LHC. They allow for...
Detector R&D and data handling
Poster Presentation
The CMS silicon tracker consists of 25 684 sensors that provide measurements of trajectories of charged particles that are used by almost any physics analysis at CMS. In order to achieve high measurement precision, the positions and orientations of all sensors have to be determined very accurately. This is achieved by track-based alignment using the global fit approach of the Millepede II...
Alberto Iorio
Top and Electroweak Physics
Poster Presentation
We present the t-channel production cross section measurements in proton-proton collisions at the LHC at centre-of-mass energies of 7 and 8 TeV TeV, using data collected with the CMS experiment during the years 2011 and 2012. Three analyses are performed to extract the inclusive t-channel production cross section at 7 TeV: a robust analysis making use of data driven techniques to extract the...
Detector R&D and data handling
Poster Presentation
A scintillation detector with two-dimensional position resolution of a few mm and
Silicon-Photo-Multiplier (SiPM), usable for large area trigger applications with
few readout channels, is presented.
Position resolution in one direction is achieved by combining two trapezoidal
shaped plastic scintillators to form one rectangular shaped scintillator rod. Each
trapezoid in a rod is...
Lara Lloret Iglesias
(Universidad de Oviedo (ES))
Higgs and New Physics
Poster Presentation
The search of the standard model Higgs boson in the H→WW→2l2ν channel with the CMS detector is described. This analysis is performed in categories, depending of the number of jets and the leptons flavour, in order to enhance the Higgs signal respect to the expected irreducible backgrounds. The largest backgrounds are estimated with data-driven methods. In some categories a fit with a 2D...
Detector R&D and data handling
Poster Presentation
Nuclotron-based Ion Collider facility (NICA) project is under realization in the Joint Institute for Nuclear Research (JINR) in Dubna. The main goal of the project is the studying of hot and dense strongly interacting matter in heavy ion collisions with the MultiPurpose Detector (MPD) at the collider NICA providing centre-of-mass energies of √sNN = 4-11 GeV (NN-equivalent) at average...
Andrea Gabrielli
(Universita e INFN, Roma I (IT))
Higgs and New Physics
Poster Presentation
Studies of the spin and parity quantum numbers of the Higgs boson candidate are presented. They are based on pp collision data collected by the ATLAS experiment at the LHC. The Standard Model spin–parity JP = 0+ hypothesis is confronted with alternative models using the kinematic properties of the Higgs boson decays into H→ γγ , H→ WW∗→ lνlν and H → ZZ∗ → 4l final states, and their...
Otilia Anamaria Ducu
(Horia Hulubei National Institute of Physics and Nuclear Enginee)
Higgs and New Physics
Poster Presentation
A search for the production of supersymmetric particles decaying into final states with jets, b-jets, missing transverse momentum and two isolated leptons, e or mu, with the same electric charge (same-sign leptons) is presented. The analysis uses a data sample collected during 2012, which corresponds to a total integrated luminosity of 20.3 fb-1 of sqrt(s) = 8 TeV proton–proton collisions...
Mikael Berggren
(Deutsches Elektronen-Synchrotron (DE))
Higgs and New Physics
Poster Presentation
A systematic study of a SUSY model with a rich spectrum accessible at the ILC
running below and up to the centre-of-mass energy of 500 GeV is presented. The
model point -- the delta M tilde-tau point of Baer & List (arXiv:1205.6929) --
is such that all sleptons and most bosinos would be produced at the ILC, while
the gluino and the first and second generation squarks are beyond the...
Flavour Physics and Fundamental Symmetries
Poster Presentation
In this talk I present SUSY_FLAVOR 2.0 is a FORTRAN code calculating a large set of flavor observables in the MSSM. It allows for the most general flavor structure of the SUSY breaking terms and (as a new feature compared to version 1) resums the chirally enhanced effects to all orders. Also the Yukawa couplings of the superpotential, necessary for the study of Yukawa unification in GUTs, are...
Flavour Physics and Fundamental Symmetries
Poster Presentation
The laws of quantum physics can be studied under
the mathematical T operation that inverts the direction of time.
Strong and electromagnetic forces are known to be invariant under temporal inversion, however the weak force is
not. The BaBar experiment recently exploited the quantum-correlated production
of neutral B mesons to show that T is a broken symmetry. Here
we show that it is...
Detector R&D and data handling
Poster Presentation
The ATLAS calorimeter plays a crucial role in the reconstruction of the energy of hadronically decaying tau leptons in the ATLAS experiment. We discuss the calibration procedure, as well as new data driven methods to measure the systematic uncertainties on the tau energy scale.
The systematic uncertainty on the energy scale of hadronic tau decays is calculated using the convolution of the...
Andrew Gerard Leister
(Yale University (US))
Detector R&D and data handling
Poster Presentation
In the ATLAS detector, hadronic decays of tau leptons are reconstructed as collimated jets with low track multiplicity. Due to the background from QCD multijet processes, efficient tau identification techniques with large jet rejection are essential. Since single variable criteria are not enough to efficiently separate them from jets and electrons, modern multivariate techniques are used. In...
Evgueni Goudzovski
(University of Birmingham)
QCD
Poster Presentation
The NA48/2 collaboration has accumulated more than one million charged kaon decays to $\pi^+ \pi^- e^\pm \nu$ $(K_{e4}^{+-})$ leading to an improved determination of the branching ratio by a factor of 3 and detailed form factors and $\pi \pi$ scattering studies. Concurrently, about 60000 charged kaon decays to $\pi^0 \pi^0 e^\pm \nu$ $(K_{e4}^{00})$ have been analyzed, increasing the...
Luca Pagani
(U)
Astroparticle Physics
Poster Presentation
The existence of dark matter is known from gravitational effects, and although its nature remains undisclosed, there is a growing indication that the galactic halo could be permeated by WIMPs with mass on the order of 100GeV. Among diverse and complementary ongoing dark matter searches, direct observation of WIMP-nuclear collisions in a laboratory detector plays a key role in this search....
Karim Louedec
(LPSC, CNRS/IN2P3, UJF-INPG)
Astroparticle Physics
Poster Presentation
The AMY experiment aims to measure the Microwave Bremsstrahlung Radiation (MBR) emitted by air-showers secondary electrons accelerating in collisions with neutral molecules of the atmosphere. The measurements are performed using a beam of 510 MeV electrons at the Beam Test Facility (BTF) of Frascati INFN National Laboratories. The goal of the AMY experiment is to measure in laboratory...
Tomoe Kishimoto
(Kobe University (JP))
Detector R&D and data handling
Poster Presentation
Events with muons in the final state served an important signature
for many physics topics at Large Hadron Collider (LHC), for instance,
discovery of Higgs boson production, searches for new phenomena, and
measurements on the standard model processes like top-quark, W, Z
production. Thus, efficient trigger on muons in data taking and
understanding its performance were crucial to...
Minsuk Kim
(Sungkyunkwan University (KR))
Detector R&D and data handling
Poster Presentation
The Resistive Plate Chambers are used in CMS as dedicated muon trigger detector both in the barrel and in the two endcape regions. They also contribute to the identification of the muons, together with Drift Tube in the barrel and Cathode Strip Chambers in the endcaps. About 4000 square meter of double gap RPCs have been produced and have been installed in the experiment since 2007. We will...
Maurizio Bonesini
(Universita & INFN, Milano-Bicocca (IT))
Detector R&D and data handling
Poster Presentation
The Muon Ionization Cooling Experiment (MICE) based at the Rutherford Appleton Laboratory aims to demonstrate 10% ionisation cooling of a beam of muons by its interaction with low Z absorber materials followed by restoration of longitudinal momentum in RF linacs.
A prototype cell of an ionization cooling channel will be preceeded and followed by two detection systems each mesuring to 0,1 %...
Detector R&D and data handling
Poster Presentation
A new 4-year R&D endeavor, carried out by four French laboratories involved in LHC experiments (IPHC Strasbourg and LPSC Grenoble) and in material science (LSPM Villetaneuse and ICube Strasbourg), is aiming at elaborating sizable (1x1 cm^2) mono-crystalline diamonds that could be used in the inner most parts of the High-Luminosity LHC pixel detectors. Polycrystalline diamonds are already used...
Antonio Salvucci
(Radboud University Nijmegen (NL))
Higgs and New Physics
Poster Presentation
This poster presents updated results and measurements of the properties of the newly observed Higgs particle in the decay channel H->ZZ*->l+l-l'+l'- ,where l,l'=e or μ. The analysis is based on 4.6 fb-1 and 20.7 fb-1of proton-proton collisions at √7 TeV and √8 TeV, respectively, recorded with the ATLAS detector at the LHC. An excess of events over background is observed at mH = 124.3 GeV with...
Flavour Physics and Fundamental Symmetries
Poster Presentation
The rarest decay B^+->pi^+ mu^+ mu^- has been observed for the first time in 2012 with an integrated luminosity of 1.0 fb^{−1} by the LHCb experiment. A more precise measurement may appear before or during the 13 TeV run in 2015. Driven by the new data and the lack of updated SM prediction, we provide a new estimation of this rare decay process based on the QCD factorization (QCDF) approach....
Cesare Calabria
(Universita e INFN (IT))
Higgs and New Physics
Poster Presentation
The most recent CMS results on the search for a Higgs boson in the WW and tau tau channel, produced in association with a Z or W boson, using the full dataset recorded at the LHC from pp collisions at centre of mass energies of 7 and 8 TeV, will be presented.
Detector R&D and data handling
Poster Presentation
In order to profit from the high luminosity and high energy runs of the LHC, the ATLAS collaboration plans to upgrade the present endcap small wheel muon spectrometer to improve the muon triggering as well as precision tracking. The New small wheel (NSW) detector will be composed of eight layers of MicroMegas (MM) detector and eight layers of small-strip Thin Gap Chamber (sTGC). The primary...
Davide Gerbaudo
(University of California Irvine (US))
Detector R&D and data handling
Poster Presentation
It is necessary to update the ATLAS forward Level 1 (L1) muon trigger for the super LHC (sLHC) with luminosity of 7.0x1034 cm-2s-1 for suppressing fake and prompt muon from heavy quarks. The small-strip Thin Gap Chambers (sTGC) is selected as primary trigger detector for updating the ATLAS New Small Wheel(NSW). The goal is to control the L1 muon trigger rate below 25KHz . This is realized by...
Detector R&D and data handling
Poster Presentation
The dedicated CMS R&D program was launched to study the feasibility of using micropattern detectors to enhance the performance of the |eta| > 1.6 region in the present CMS muon endcap system. The proposed detector for CMS is a triple-GEM trapezoidal chamber, equipped with 1D readout, with dimensions (990x440-220) cm2. GEMs can provide precision tracking and fast trigger information,...
Dominik Dannheim
(CERN)
Detector R&D and data handling
Poster Presentation
The CALICE collaboration has tested several large calorimeter systems in test
beams in recent years. These detectors, based on iron and tungsten absorbers
and different readout technologies, are all designed to meet the requirements of jet
reconstruction at a future linear collider using particle flow techniques, which
means that they were all read out with high spatial granularity in...
Sara Caroline Alderweireldt
(University of Antwerp (BE))
Higgs and New Physics
Poster Presentation
A search for the standard model Higgs boson in the vector boson fusion production channel with decay to bottom quarks is reported. A data sample comprising 19.0 fb-1 of proton-proton collisions at root(s) = 8 TeV collected during the 2012 running period has been analyzed and 95% Confidence Level upper limits are derived for five mass points from 115 to 135 GeV. At a Higgs boson mass of 125 GeV...
