Prof.
Mikhail Danilov
(Institute for Theoretical and Experimental Physics (RU))
07/07/2012, 18:00
Track 13. Detectors and Computing for HEP
Poster Sessions
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...
Dr
Nicholas Setzer
(Universidad de Granada (ES))
07/07/2012, 18:00
Track 13. Detectors and Computing for HEP
Poster Sessions
In particle physics, after specifying the symmetries of a theory, the field content and their transformations under the symmetries, the resulting procedure for obtaining physical results is well-defined and algorithmic. This talk presents a program that permits the user to simply specify the relevant content and automatically generate a Lagrangian.
Dr
Matthew Wingate
(University of Cambridge (UK))
07/07/2012, 18:00
Track 7. CP Violation, CKM, Rare Decays, Meson Spectroscopy
Poster Sessions
We present our calculation of B to Kstar and Bs to phi form factors (and those for B to rho and Bs to Kstar). These are obtained from lattice QCD calculations which include the effects of up, down, and strange sea quarks and use the nonrelativistic formulation for the bottom quark. Results are obtained directly in the low recoil (large q-squared) kinematic range, complementing results...
Dr
Yasuhiro Shimizu
(Tohoku Univ. (JP))
07/07/2012, 18:00
Track 1 - The Standard Model and EW Symmetry Breaking - Higgs Searches
Poster Sessions
We propose a class of observables constructed from lepton energy distribution, which are independent of the velocity of the parent particle if it is scalar or unpolarized. These observables may be used to measure properties of various particles in the LHC experiments. We demonstrate their usage in a determination of the Higgs boson mass.
Anupam Singh
(L.N.Mittal I.I.T. (IN))
07/07/2012, 18:00
Track 11. Particle Astrophysics and Cosmology
Poster Sessions
Dark Energy is the dominant component of the Energy Density of the Universe. It is imperative to understand the gravitational dynamics of Dark Energy and its implications. The most promising candidate for dark energy is the energy density of fields in curved space-time. We describe the formalism to study the time evolution and gravitational dynamics of dark energy field configurations given...
Dr
Ivan Alexandrov
(ITEP (RU))
07/07/2012, 18:00
Track 13. Detectors and Computing for HEP
Poster Sessions
A concept of readout of noble gas two-phase emission detectors by means of multipixel avalanche Geiger photodiodes (MGPDs or SiPMs) and a THGEM structure is presented.
It is well known that a two-phase emission technique with noble gases is a very sensitive method of detection of very small ionisation signals (down to few or single ionisation electrons). Electroluminescent “amplification”...
Dr
Sascha Turczyk
(LBNL (US))
07/07/2012, 18:00
Track 6. QCD, Jets, Parton Distributions
Poster Sessions
In the era of the LHC experiments the analysis of vector boson together with n jet production becomes very important. On the one hand these processes serve as a testing environment for perturbative QCD calculations as well as detector understanding. On the other hand, W/Z+n jet production is used for new physics searches and thus one has to deal with a huge amount of irreducible Standard Model...
Dr
Tobias Kasprzik
(KIT (DE))
07/07/2012, 18:00
Track 1 - The Standard Model and EW Symmetry Breaking - Higgs Searches
Poster Sessions
A review of the recent progress in the theory predictions for vector-boson plus jet(s) production at the LHC is given, focussing on the discussion of electroweak corrections, where all off-shell effects due to the vector-boson decay are included consistently. The electroweak contributions amount up to several tens of percent at high transverse momenta and thus significantly affect the V+jet...
Dr
Elena Kokoulina
(Joint Institute for Nuclear Research (RU))
07/07/2012, 18:00
Track 6. QCD, Jets, Parton Distributions
Poster Sessions
Experiments at LHC give evidence of similarity of multiple production mechanisms in proton interactions at high multiplicities [1] and central collisions of relativistic heavy ions (RHIC). Studies at high multiplicity (more than mean value) region are carried out at U-70 accelerator at IHEP (Protvino). They are aimed at the search for collective phenomena.
It is known that mainly pions are...
Dr
Doyoun Kim
(Monash University (AU))
07/07/2012, 18:00
Track 2 - Beyond the Standard Model - SUSY
Poster Sessions
Suppressing the bunch of top quark background is essential in finding the top squark at the LHC. Currently we are not optimized in the discrimination of them. We suggest the azimuthal angle around the beam axis be a good discriminator and show its utility in the dijet+Missing Energy channel at the LHC with 14 TeV center of energy.
Ms
Olga Novgorodova
(DESY (DE))
07/07/2012, 18:00
Track 14. Future Accelerators
Poster Sessions
In detectors at Future Linear Colliders a Beam Calorimeter (BeamCal) is foreseen. The main BeamCal goals are coverage of low polar angles for new physics searches and beam tuning. The challenges are radiation hardness of sensors due to a large amount of beamstrahlung remnants, fast readout, fine granularity and compactness. A prototype of a BeamCal sensor made of GaAs with pad structures was...
Mr
Ming-Hsun Li
(Chung Yuan Christian University (TW))
07/07/2012, 18:00
Track 11. Particle Astrophysics and Cosmology
Poster Sessions
We study the possibility that the galactic dark matter exists in the phantom field responsible for the dark energy. The statically and spherically exact solution for this kind of the galaxy system with a supermassive black hole at its center is obtained. The solution of the metric functions is satisfied with $g_{tt} = - g_{rr}^{-1}$. In a galaxy, the background of the phantom field, which is...
Prof.
Eigen Gerald
(University of Bergen (NO))
07/07/2012, 18:00
Track 7. CP Violation, CKM, Rare Decays, Meson Spectroscopy
Poster Sessions
We have updated our unitary triangle fitting program based on the scan method\footnote{Global fits of the CKM matrix. G. Eigen, G.P. Dubois-Felsmann, D.G. Hitlin, F.C. Porter. Eur.Phys.J. C33 (2004) S644, e-Print: hep-ex/0312062.} to constrain the $\bar{\rho}- \bar{\eta}$ plane using the standard input measurements (CKM matrix elements, $\sin 2 \beta$, $B^0_{d(s)}$ mixing, and $\epsilon_K$)...
Prof.
George W.-S. Hou
(National Taiwan University (TW))
07/07/2012, 18:00
Track 3 - BSM - Non-SUSY Exotics
Poster Sessions
Drawing an analogy of replacing the nucleon by heavy (chiral) quark Q, the pion by longitudinal weak boson (i.e. Goldstone boson G), and the pi-N-N coupling by G-Q-Q Yukawa coupling, we construct a statistical model for annihilation of QQ(bar) into multi-Goldstone bosons, i.e. n longitudinal weak bosons. This analogy is becoming prescient since the LHC direct bound on heavy chiral quark (the...
Dr
Sinead Farrington
(University of Oxford (UK))
07/07/2012, 18:00
Track 1 - The Standard Model and EW Symmetry Breaking - Higgs Searches
Poster Sessions
We investigate the potential for measuring the relative couplings of a low-mass Higgs boson at the Large Hadron Collider using W H, ZH, and ttH production, where the Higgs boson decays to tau-lepton pairs. With 100
fb−1 of sqrt(s) = 14 TeV pp collision data we find that these modes can improve coupling-ratio sensitivity for a Higgs boson mass between 115 and 135 GeV/c2 .
Prof.
Sudhir Malik
(University of Nebraska-Lincoln (US))
07/07/2012, 18:00
Track 6. QCD, Jets, Parton Distributions
Poster Sessions
The identification of jets associated with the production of b quarks is an essential tool both for the measurement of standard-model processes and in the search for physics beyond this model at the Large Hadron Collider. The CMS experiment has developed a variety of algorithms that use the impact parameters of charged-particle tracks, the properties of reconstructed decay vertices, the...
Dr
Alessandro Bertolin
(INFN Padova)
07/07/2012, 18:00
Track 6. QCD, Jets, Parton Distributions
Poster Sessions
The double differential inelastic J/psi photoproduction cross section
as function of the squared transverse momentum of the J/psi in bins of the inelasticity z has been measured in ep collisions with the ZEUS detector at HERA.
An integrated luminosity of 468 pb-1 was used corresponding
to the full data sample collected by the ZEUS experiment.
The events were required to have 0.1 < z < 0.9,...
Dr
Jason Kumar
(University of Hawaii (US))
07/07/2012, 18:00
Track 2 - Beyond the Standard Model - SUSY
Poster Sessions
A broad class of scenarios for new physics involving additional strongly-interacting fields predict signatures at hadron colliders which consist solely of large numbers of jets and substantial missing transverse energy. We investigate the prospects for discovery in such scenarios using a search strategy in which jet multiplicity and missing transverse energy are employed as the primary...
Dr
Krishna Kumar Singh
(Bits Pilani Dubai Campus (AE))
07/07/2012, 18:00
Track 6. QCD, Jets, Parton Distributions
Poster Sessions
A thermodynamical bag model is used to calculate the nucleon structure function by treating the quarks and gluons as Fermi and Bose gases. It is found to agree well with the experimental data. In this article this model is used to calculate the longitudinal structure function which is related to the ratio of absorption cross section for longitudinally and transversely polarized virtual...
. H1 Collaboration
(DESY)
07/07/2012, 18:00
Track 6. QCD, Jets, Parton Distributions
Poster Sessions
Deep-inelastic positron-proton scattering events at low photon virtuality Q2 with a forward jet, produced at small angles with respect to the proton beam, are measured with the H1 detector at HERA. A subsample of events with an additional jet in the central region is also studied. For both samples differential cross sections and normalised distributions are measured as a function of the...
Dr
Glenn Lopez
(Stony Brook University (US))
07/07/2012, 18:00
Track 8. Neutrinos
Poster Sessions
One of the main physics goal of the T2K experiment is the measurement of the angle theta_13 in the neutrino mixing matrix. This is done 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 performed two analyses to at...
Dr
Salim Cerci
(Cukurova University (TR))
07/07/2012, 18:00
Track 6. QCD, Jets, Parton Distributions
Poster Sessions
We present the measurements of inclusive production cross sections for forward jets, as well for jets in dijet events with at least one jet emitted at central and the other at forward pseudorapidities in proton-proton collisions at sqrt{s} = 7 TeV. The measurements were performed in the range of transverse momenta pT = 35 – 150 GeV/c within pseudorapidities 3.2 < |eta| < 4.7, and central jets...
Ms
Jana Novakova
(Charles University (CZ))
07/07/2012, 18:00
Track 1 - The Standard Model and EW Symmetry Breaking - Higgs Searches
Poster Sessions
The Z to tau tau cross section has been recently measured using data collected with the ATLAS detector corresponding to the integrated luminosity of 1.34 − 1.55 fb-1. The analysis is performed in three different final states determined by decay modes of the tau leptons - so-called electron + hadronic tau, muon + hadronic tau and electron + muon channels. Cross sections are measured separately...
Ms
Agnieszka Leyko
(Universitaet Bonn (DE))
07/07/2012, 18:00
Track 13. Detectors and Computing for HEP
Poster Sessions
Many physics analyses with the ATLAS detector expect to have jets originating from b-quarks in the final state. Algorithms that allow to identify such jets are thus of great importance and it is crucial to study their performance directly in data by measuring the tagging efficiencies and fake rates.
Since the top quark almost exclusively decays to a W boson and a b-quark, a sample of top...
Dr
Heather Ray
(University of Florida)
07/07/2012, 18:00
Track 8. Neutrinos
Poster Sessions
This poster presents preliminary results from the MINERvA experiment. We present the muon neutrino CC inclusive cross section measurement, performed as a ratio across different nuclear materials.
James Alexander Kraus
(Michigan State University (US)), Dr
James Kraus
(Michigan State University)
07/07/2012, 18:00
Track 3 - BSM - Non-SUSY Exotics
Poster Sessions
We describe a model independent search for physics beyond the standard model in lepton final states. We examine 117 final states using 1.1 fb-1 of ppbar collisions data at sqrt(s) = 1.96 TeV collected with the D0 detector. We conclude that all observed discrepancies between data and model can be attributed to uncertainties in the standard model background modeling, and hence we do not see any...
Dr
Oliver Pooth
(Rheinisch-Westfaelische Tech. Hoch. (DE))
07/07/2012, 18:00
Track 13. Detectors and Computing for HEP
Poster Sessions
In the high luminosity LHC scenario (HL-LHC) with a luminosity up to ten times higher than at LHC and running at 14 TeV centre-of-mass energy, it will be important to rely on a more accurate transverse momentum resolution in order to keep the trigger rate under control and reach low pT thresholds. In order to improve the transverse momentum resolution the idea is to combine the high precision...
Dr
Stephen Gibson
(CERN (CH))
07/07/2012, 18:00
Track 13. Detectors and Computing for HEP
Poster Sessions
The proton-proton collision events recorded by the ATLAS experiment are on top of a background that is due to both collision debris and non-collision components. The latter comprises of three types: beam-induced backgrounds, cosmic particles and detector noise. We present studies that focus on the first two of these. We give a detailed description of beam-related and cosmic backgrounds based...
Dr
Silvestro Di Luise
(Eidgenoessische Tech. Hochschule Zuerich (CH))
07/07/2012, 18:00
Track 8. Neutrinos
Poster Sessions
We present an optimization of the neutrino beam which could be produced at CERN and aimed to the newly proposed deep-underground neutrino observatory LAGUNA-LBNO located at distance of about 2300 km (Phyasalmi mine, Finland). Specific scenarios for the proton driver and the far detectors have been investigated. In particular, the flux predictions have been obtained by means of a full GEANT4...
Dr
Darius Jurciukonis
(Vilnius University (LT))
07/07/2012, 18:00
Track 8. Neutrinos
Poster Sessions
The Standard Model includes neutrinos as massless particles, but neutrino oscillations showed, that neutrinos are not massless. A simple extension of adding gauge singlet fermions to the particle spectrum allows normal Yukawa mass terms for neutrinos. Then smallness of the neutrino masses can be well understood within the seesaw mechanism (type I). After spontaneous symmetry breaking of the...
Dr
Brian Robson
(Australian National University (AU))
07/07/2012, 18:00
Track 7. CP Violation, CKM, Rare Decays, Meson Spectroscopy
Poster Sessions
The parity of pions will be discussed within the framework of the Generation Model [1] of particle physics and it will be shown that both the 1954 determination [2] of the parity of the charged pions and the 2008 determination [3] of the parity of the neutral pion are compatible with the mixed-parity nature of the pions predicted by a recent composite Generation Model [4]. The development of...
Mr
Kevin Daniel Finelli
(Duke University (US))
07/07/2012, 18:00
Track 13. Detectors and Computing for HEP
Poster Sessions
The ATLAS Transition Radiation Tracker (TRT) is an integral subsystem for precision tracking at ATLAS. In addition, transition radiation signatures allow for particle identification capabilities. Monitoring the performance of the TRT helps establish the necessary foundation for understanding higher level tracking reconstruction and particle identification. We present our current studies on how...
Dr
Ivanka Bozovic-Jelisavcic
(Vinca Institute of Nuclear Sciences, University of Belgrade (RS))
07/07/2012, 18:00
Track 13. Detectors and Computing for HEP
Poster Sessions
The very forward region at a future e+e- collider detector will be instrumented with calorimeters dedicated primarily for precise measurement of the integral luminosity, providing at the same time information for beam-tuning, shielding of the inner detectors and also improving the overall detector hermeticity. Detector designs optimized for the ILC and CLIC colliders are presented, with...
Dr
Fredy Ochoa
(Universidad Nacional de Colombia Sede Bogota (CO))
07/07/2012, 18:00
Track 1 - The Standard Model and EW Symmetry Breaking - Higgs Searches
Poster Sessions
In this work we study the production cross section of the heaviest charged Higgs bosons (H_2^±) predicted by the SU(3)_c X SU(3)_L X U(1)_x gauge model (3-3-1 model) without exotic charges. Taking into account intermediate vector bosons, including a new Z’ neutral boson predicted by the model, we calculate the cross section of H_2^± pair production in Drell-Yan processes at CERN-LHC hadron...
Dr
Jun Kameda
(ICRR, University of Tokyo (JP))
07/07/2012, 18:00
Track 3 - BSM - Non-SUSY Exotics
Poster Sessions
We present recent results of the search for baryon number violating phenomena predicted by GUTs in Super-Kamiokande covering nucleon decay and neutron-antineutron oscillation.
Grand Unified Theories (GUTs) seek to unify the strong and electroweak forces, and a unique prediction of the GUTs is baryon number violation. Two quarks in a nucleon can transform into a lepton and an antiquark...
Ms
Saptaparna Bhattacharya
(Brown University (US))
07/07/2012, 18:00
Track 3 - BSM - Non-SUSY Exotics
Poster Sessions
Presented is a study of searches for two exotic particles - a heavy top quark partner with a fractional charge of 5/3, $T_{5/3}$, and its partner, the heavy $B$ quark with charge -1/3. These particles decay to a top quark and a $W$ boson, leading to very busy events with multi-leptons and multi-jets. Processes where same-sign dileptons are produced are considered. The backgrounds are...
Dr
Elisa Guido
(INFN-Genova (IT))
07/07/2012, 18:00
Track 2 - Beyond the Standard Model - SUSY
Poster Sessions
We report on a search for charged long-lived heavy particles, as predicted by several beyond the Standard Model theories. Such particles can be detected in ATLAS through anomalous specific ionisation measured in the Pixel detector, their slow motion (beta<1) measured in the calorimeter, and also through their possible muon-likeness in the Muon Spectrometer. Results of this search on the full...
Ms
Flavia De Almeida Dias
(UNESP - Universidade Estadual Paulista (BR))
07/07/2012, 18:00
Track 3 - BSM - Non-SUSY Exotics
Poster Sessions
We present a search by the CMS experiment for new exotic particles decaying to the VZ final state, where V is either a W or a Z decaying hadronically and the Z decays to dielectrons or dimuons. The analysis uses the full 2011 dataset at √s = 7 TeV.
Ms
Agni Bethani
(DESY (DE))
07/07/2012, 18:00
Track 1 - The Standard Model and EW Symmetry Breaking - Higgs Searches
Poster Sessions
Results are presented on the search for the standard model Higgs boson decaying into two tau leptons, using both leptonic and hadronic decays of the tau. The sample are split into various categories to enhance the search sensitivity. The full data sample of 4.7 fb-1 of pp collisions collected in 2011 with the CMS experiment at a CM energy of 7 TeV have been analyzed, as well as a significant...
Mr
Seyed Mohsen Etesami
(Institute f. Studies in Theoretical Physics and Mathematics (IR))
07/07/2012, 18:00
Track 3 - BSM - Non-SUSY Exotics
Poster Sessions
We present a poster to report the results of a search for large extra dimensions in events with two isolated electrons using the whole 5 fb^-1 of data collected with the CMS detector at the LHC in 2011. The exclusion limits on the parameters of different models with different assumptions on the validity range of the model are shown
Dr
Adrian Perieanu
(RWTH Aachen (DE))
07/07/2012, 18:00
Track 1 - The Standard Model and EW Symmetry Breaking - Higgs Searches
Poster Sessions
The search for the neutral Higgs bosons decaying via the mu+mu- channel in the MSSM m^max_h scenario is presented. The analysed
data were recorded in 2011 with the CMS detector at 7 TeV centre of
mass energy. The 95% C.L. exclusion limits on the cross section
times branching ratio and the (m_{A^0}, tan\beta) limits are presented.
Prof.
Yoshitaka Kuno
(Osaka University (JP))
07/07/2012, 18:00
Track 3 - BSM - Non-SUSY Exotics
Poster Sessions
The COMET experiment at J-PARC is an experiment to search for muon to electron conversion at a single event sensitivity of 3x10^{-16}. This process is charged-lepton flavor violating. We are planning to stage the COMET experiment. The staging approach is endorsed by J-PARC PAC and KEK. We will present the details of COMET Phase-I.
Thiago Fernandez Perez Tomei
(UNESP - Universidade Estadual Paulista (BR))
07/07/2012, 18:00
Track 3 - BSM - Non-SUSY Exotics
Poster Sessions
We search for the production of heavy resonances in proton-proton collisions at sqrt(s) = 7 TeV, with the Randall-Sundrum graviton as a benchmark model. We focus on the G to ZZ to qqbar nunubar reaction with boosted Z bosons. We look for the jet plus missing transverse energy signature in the 4.7 fb^-1 of data collected by the CMS detector during 2011. Since the event yield is compatible with...
Dr
Katarzyna Wichmann
(DESY)
07/07/2012, 18:00
Track 4 - Top Quark Physics
Poster Sessions
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...
Prof.
Gobinda Majumder
(Tata Inst. of Fundamental Research (IN))
07/07/2012, 18:00
Track 1 - The Standard Model and EW Symmetry Breaking - Higgs Searches
Poster Sessions
Results are presented on the search for the standard model Higgs boson decaying into two Z bosons, with one boson decaying into a pair of charged leptons, either muons or electrons, and the other boson decaying into a pair of taus which taus decay both hadronically and leptonically. This analysis is mainly sensitive for Higgs masses higher than 180 GeV where both Z's are on-shell. For low mass...
Lara Lloret Iglesias
(Universidad de Oviedo (ES))
07/07/2012, 18:00
Track 1 - The Standard Model and EW Symmetry Breaking - Higgs Searches
Poster Sessions
Results are presented on the search for the standard model Higgs boson decaying into two W bosons, with each W boson decaying into a charged lepton and a neutrino. The full data sample of 2012 luminosity delivered so far at the new energy of 8 TeV has been analyzed. WW production cross section is also presented.
Dr
Christian Veelken
(Ecole Polytechnique (FR))
07/07/2012, 18:00
Track 1 - The Standard Model and EW Symmetry Breaking - Higgs Searches
Poster Sessions
A search for a Higgs boson in the four-lepton decay channel Higgs to ZZ(*), with each Z boson decaying to an electron or muon pair, is presented using 4.7 fb-1 of integrated luminosity collected during 2011 as well as considerable fraction of 2012 integrated luminosity recorded by the CMS detector in pp collisions from the LHC at CM energy of 7 TeV. The search covers Higgs boson mass...
848.
Search for supersymmetry in events with a Z boson, jets and missing energy using the JZB method
Marco Andrea Buchmann
(Eidgenoessische Tech. Hochschule Zuerich (CH))
07/07/2012, 18:00
Track 2 - Beyond the Standard Model - SUSY
Poster Sessions
We present a search for Physics beyond the Standard Model (SM) in final states with a Z boson, jets and missing transverse energy, using the full data sample collected in 2011 by the CMS detector at the Large Hadron Collider corresponding to an integrated luminosity of 4.7 /fb. This final state is predicted in several models of Physics beyond the SM, including supersymmetry. The Jet-Z Balance...
Physics Coordinators D0
07/07/2012, 18:00
Track 4 - Top Quark Physics
Poster Sessions
Using data collected with the D0 detector at the Fermilab Tevatron Collider, corresponding to 5.3 fb-1 of integrated luminosity, we search for violation of Lorentz invariance by examining the ttbar production cross section in lepton+jets final states. We quantify this violation using the standard-model extension framework, which predicts a dependence of the ttbar production cross section on...
Prof.
Kai-Feng Chen
(National Taiwan University (TW))
07/07/2012, 18:00
Track 3 - BSM - Non-SUSY Exotics
Poster Sessions
We present results from searches for heavy exotic vector-like quarks performed using 5 fb-1 data sample of pp collisions at the center-of-mass energy of 7 TeV collected by the CMS detector at LHC.
Mr
Benjamin Farmer
(Monash University (AU))
07/07/2012, 18:00
Track 2 - Beyond the Standard Model - SUSY
Poster Sessions
We calculate Bayes factors to quantify how the feasibility of the constrained minimal supersymmetric model (CMSSM) has changed in the light of a series of observations. This is done in the subjective Bayesian spirit where probability reflects a degree of belief in a proposition and Bayes' theorem tells us how to update it after acquiring new information. Our experimental baseline is the...
Prof.
Satyanarayan Nandi
(Oklahoma State University (US))
07/07/2012, 18:00
Track 4 - Top Quark Physics
Poster Sessions
New physics at the TeV scale is highly anticipated at the LHC. New particles with color, if within the LHC energy reach, will be copiously produced. One such particle is a diquark, having the quantum numbers of two quarks, and can be a scalar or a vector. It will decay to two light quarks, or two top quarks, or a top and a light quark, (up or down type depending on the quantum number of the...
Dr
Fernando T Brandt
(Universidade de São Paulo)
07/07/2012, 18:00
Track 12. Formal Theory Developments
Poster Sessions
We investigate the two loop contributions to the effective action of static gravitational fields at finite temperature. This allows us to take into account the effects of interactions of the thermal particles and the resulting higher loop contributions to the pressure of thermal matter in a gravitational background.
Dr
Krishna Kumar Singh
(Bits Pilani Dubai Campus (AE))
07/07/2012, 18:00
Track 6. QCD, Jets, Parton Distributions
Poster Sessions
In the Thermodynamical Model the quarks and gluons are treated as Fermi adn Bose gases.The nucleon structure functions calculated using this model agree well with the experimental values.Hence we now propose to use this model to calculate the nucleon structure functions including the higher twist contributions and compare with the corresponding experimental data. This throws more light on the...
Mr
Raman Khurana
(Saha Institute of Nuclear Physics (IN))
07/07/2012, 18:00
Track 13. Detectors and Computing for HEP
Poster Sessions
CMS has developed sophisticated tau identification algorithms for tau hadronic decay modes. Production of tau lepton decaying to hadrons are studied at 8 TeV centre of mass energy with 2012 collision data collected by CMS detector and has been used to measure the performance of tau identification algorithms by measuring identification efficiency and mis-identification rates from electrons,...
Dr
Sudhir Kumar Gupta
(Monash University (AU))
07/07/2012, 18:00
Track 3 - BSM - Non-SUSY Exotics
Poster Sessions
Lepton charge asymmetry, LHC analog of the forward-backward asymmetry of the Teavtron, can be an useful tool to probe new physics that "hides-out" from the dilepton invariant mass distribution due to large SM background in the tail region. To demonstrate how sensitive it can be to the new physics models, we will consider example of models which may or "may not" leave their imprints in the...
Dr
Satoshi Mishima
(INFN Rome (IT))
07/07/2012, 18:00
Track 6. QCD, Jets, Parton Distributions
Poster Sessions
We calculate the cross sections and final state distributions for the processes e^+ e^- -> Upsilon(1S) (pi^+ pi^-, K^+ K^-, eta pi^0) near the Upsilon(5S) resonance based on the tetraquark hypothesis. This framework is used to analyse the data on the Upsilon(1S) pi^+ pi^- and Upsilon(1S) K^+ K^- final states, yielding good fits. Dimeson invariant mass spectra in these processes are shown to be...
Mr
Curtis William Black
(University of Sydney (AU))
07/07/2012, 18:00
Track 13. Detectors and Computing for HEP
Poster Sessions
With the high luminosities of proton-proton collisions achieved at the LHC, the strategies for triggering have become more important than ever for physics analysis. The naïve inclusive single tau lepton triggers now suffer from severe rate limitations. To allow for a large program of physics analyses with taus, the development of topological triggers that combine tau signatures with other...
Dr
Takashi Kubota
(University of Melbourne (AU))
07/07/2012, 18:00
Track 13. Detectors and Computing for HEP
Poster Sessions
Events with muons in the final state are an important signature for many physics topics at Large Hadron Collider (LHC), for instance, searches for Higgs boson production or new phenomena, measurements on the standard model processes like top-quark, W, Z production.
Thus, efficient trigger on muons in data taking and understanding its performance are crucial to perform these physics studies....
Mr
Kong Guan Tan
(University of Melbourne (AU))
07/07/2012, 18:00
Track 13. Detectors and Computing for HEP
Poster Sessions
Tau leptons play an important role in the physics program at the LHC.
They are used not only in searches for new phenomena like the Higgs boson or Supersymmetry and electroweak measurements but also in detector related studies like the determination of the missing transverse energy scale.
Optimal identification of hadronically decaying tau leptons is achieved by using detailed...
Cristina Biino
(Universita e INFN (IT))
07/07/2012, 18:00
Track 13. Detectors and Computing for HEP
Poster Sessions
The branching ratio (BR) for the decay K^+ \to \pi^+\nu\bar{\nu} is a sensitive probe for new physics. The NA62 experiment at the CERN SPS will measure this BR to within about 10%. To reject the dominant background from channels with final state photons, the large-angle vetoes (LAVs) must detect photons with energies as low as 200 MeV with an inefficiency of less than 10^{-4}, as well as...
Dr
Chong Chung Lih
(Department of Optometry, Shu-Zen College of Medicine and Management (TW))
07/07/2012, 18:00
Track 7. CP Violation, CKM, Rare Decays, Meson Spectroscopy
Poster Sessions
We use the light fornt quark model in order to improve the theoretical prediction of the transition form factor of pi^{0} (eta(')) to gamma^* gamma as a function of the momentum transfer Q^2. We compare our result with the experimental data by BaBar as well as other calculations based on the LFQM. We show that our predicted form factor fits well with the experimental data, particularly ...
Mrs
Olga Driga
(SUBATECH (FR))
07/07/2012, 18:00
Track 6. QCD, Jets, Parton Distributions
Poster Sessions
The success in understanding dynamics of soft particles inside jets relies on calculations of perturbative QCD, impressive accuracy of which have already been tested experimentally. However, the theory predicts, that the inclusive particle spectrum inside jets is independent of a collision energy in the limiting case of zero momentum ( p → 0 ). In order to test this prediction, a systematic...
