-
01/09/2010, 08:00
-
Prof. Thomas Muller (IEKP Universitaet Karlsruhe (TH))01/09/2010, 09:00
-
Roy Briere (Carnegie Mellon University)01/09/2010, 09:10
-
Lucia Masetti (Institut fur Physik)01/09/2010, 09:30
-
Lucia Silvestris (Istituto Nazionale di Fisica Nucleare (INFN))01/09/2010, 09:55
-
Nadia Pastrone (INFN)01/09/2010, 10:40
-
Dr Brian Petersen (CERN)01/09/2010, 11:10
-
Erich Varnes (University of Arizona)01/09/2010, 11:40
-
Thomas Schwarz (University of California Davis)01/09/2010, 12:10
-
Prof. Florencia Canelli (University of Chicago and Fermilab)01/09/2010, 14:00
-
Prof. Youngjoon Kwon (Yonsei University)01/09/2010, 14:45
-
Steven Robertson (High Energy Physics Group-McGill University-Unknown)01/09/2010, 15:15
-
Mathew Graham (SLAC)01/09/2010, 15:45
-
Galina Pakhlova (ITEP)01/09/2010, 16:40
-
Anze Zupanc (KIT)01/09/2010, 17:10
-
Werner Man-Li Sun (Cornell University-Unknown-Unknown)01/09/2010, 17:55
-
Zhengguo Zhao (University of Science and Technology of China)01/09/2010, 18:25
-
Francesco Renga02/09/2010, 08:30
-
G. Fisk (FNAL)02/09/2010, 09:00
-
Thomas Kuhr (Institut fuer Experimentelle Kernphysik)02/09/2010, 09:30
-
Eleni Petrakou (Nat. Cent. for Sci. Res. Demokritos (NRCPS))02/09/2010, 10:00The operation and general performance of the CMS electromagnetic calorimeter at sqrt{s} = 7 TeV are described. The first LHC beams have been used to finalize the commissioning of ECAL readout and trigger. The precision of the inter-channel synchronization and calibration has been verified and improved with collision data, exploiting decays of pi0s and eta into two photons, the phi invariance...Go to contribution page
-
Ms Regina Kwee (CERN/Humboldt University of Berlin)02/09/2010, 10:08Since the restart of the LHC, ATLAS has successfully recorded data at sqrt{s} = 0.9 and 7 TeV. The ATLAS trigger strategy realised a step-wise activation of the three level trigger system, starting with hardware-based first-level (L1) triggers and moving with increasing luminosities to the deployment of the software-based high-level triggers (HLT). We will present L1 and HLT triggers and their...Go to contribution page
-
Verena Ingrid Martinez Outschoorn (Harvard University)02/09/2010, 10:16The first measurement of the production cross-sections for W and Z bosons in proton proton interactions at sqrt(s) = 7 TeV are reported from the ATLAS experiment. Based on its excellent capability for reconstructing both high pT electrons and muons, the electron and the muon decay modes of the W/Z bosons are compared. First results for the ratio of W/Z production and of W+/W- production...Go to contribution page
-
Daniel Martschei (Inst. fuer Experimentelle Kernphys.-Universitaet Karlsruhe-Unkno)02/09/2010, 10:24We describe a measurement of the inclusive b-jet production in pp collisions at sqrt(s) = 7 TeV. The analysis has been done on the first physics data collected by the CMS experiment at the Large Hadron Collider at CERN. To improve the low p_T measurement, the jets are reconstructed with the Particle Flow algorithm. The experimental uncertainties from jet energy corrections, jet energy...Go to contribution page
-
Dr Jan Lueck (EKP)02/09/2010, 10:32After the first observation of the inclusive single top-quark production in the s- and t-channels by both CDF and D0, the Tevatron collaborations combined their measurements using the distributions of their multivariate discriminants. A Bayesian analysis is used to extract the cross section at a center of mass energy of 1.96 TeV from 3.2/fb (CDF) and 2.3/fb (D0) of data, respectively. For a...Go to contribution page
-
Evgueni Goudzovski (University of Birmingham)02/09/2010, 11:20
-
Gaia Lanfranchi (Istituto Nazionale di Fisica Nucleare (INFN))02/09/2010, 12:05
-
Gilad Perez (Weizmann Institute)02/09/2010, 14:00
-
Katerina Lipka (DESY Hamburg)02/09/2010, 14:45
-
Klaus Rith (University of Erlangen)02/09/2010, 15:30
-
Ian Brock (Physikalisches Institut)02/09/2010, 16:35
-
Thomas Nunnemann (LMU Munich)02/09/2010, 17:20
-
Marcella Capua (Dipartimento di Fisica-Univ. degli Studi della Calabria-Unknown)02/09/2010, 18:05
-
Johannes Wessels (Institut fuer Kernphysik-Westfaelische Wilhelms-Universitaet Mun)02/09/2010, 18:35CanceledGo to contribution page
-
Walter Giele (Fermilab)03/09/2010, 08:30CanceledGo to contribution page
-
Satish Desai (Fermilab)03/09/2010, 09:15
-
Giacomo Contin (Dipartimento di Fisica-Universita degli Studi di Trieste / INFN Sezione di Trieste)03/09/2010, 10:00The Silicon Strip Detector (SSD) is a fundamental part of the Inner Tracking System (ITS) for the ALICE experiment. Since the early phase of p-p collisions at LHC, the SSD is fully operational and participating in the charged particle detection and identification carried out by ALICE. The performance of the SSD during the 900 GeV and 7 TeV collision data taking is presented here. The...Go to contribution page
-
Mr Kazuyuki Sakai (Niigata University (Japan))03/09/2010, 10:08We present a result of search for CP-violating charge asymmetry in B^+ -> J/psi K^+ decays using 772x10^6 B anti-B meson pairs collected with the Belle detector at the KEKB asymmetric energy e^+ e^− collider. The result supersedes our previous measurement and represents the most sensitive measurement up to date.Go to contribution page
-
Ms Oksu Seon (Nagoya University)03/09/2010, 10:16In the Standard Model, lepton-number-violating decays such as $B^+ \to D^- \ell^+ \ell^+$ is strictly forbidden, but they are allowed if there exist Majorana-type neutrinos. In this poster, we report a first search for $B^+ \to D^- \ell^+ \ell^+$ ($\ell = e$ or $\mu$) decays with 772$\times 10^{-6}$ $B \bar{B}$ pairs produced by energy-asymmetric $e^+ e^-$ collision at KEKB accelerator and...Go to contribution page
-
Daniel Zander (Karlsruhe Institute of Technology)03/09/2010, 10:24The full reconstruction is an important tool for particle physics at the $B$ factories. By fully reconstructing one of the two $B$ mesons coming from the $\Upsilon (4S)$ resonance (tag side), the 4-momentum of the other $B$ meson (signal side) is immediately known and all remaining tracks in the detector can be associated with this other $B$ meson. The full reconstruction is therefore an...Go to contribution page
-
Mr Jürgen Winter (TU München)03/09/2010, 10:32The 100t fiducial volume liquid-scintillator experiment Borexino, located at the Laboratori Nazionali del Gran Sasso, is far more than an observatory for solar neutrinos. Its extremely low energy threshold of about 50 keV due to its unprecedented radiopurity also enable to conduct other analyses, i.e. the search for geo-neutrinos, the investigation of the Pauli exclusion principle in Carbon-12...Go to contribution page
-
Dr Christopher Hays (University of Oxford)03/09/2010, 11:10
-
Dr Stefan Ritt (Paul Scherrer Institute)03/09/2010, 11:55
-
Tilman Plehn (Heidelberg University)03/09/2010, 14:00
-
Aksel Hallin (University of Alberta)03/09/2010, 14:45
-
Dr Alexandre Sousa (Harvard University)03/09/2010, 15:30
-
Michael Wilking (TRIUMF)03/09/2010, 16:15
-
Riccardo Brugnera (Universita' di Padova and INFN)04/09/2010, 08:30
-
Jose Valle04/09/2010, 09:00
-
Rafael Lang04/09/2010, 09:45
-
Carmelo Sgro' (INFN-Pisa)04/09/2010, 10:45
-
Thomas Gaisser (University of Delaware)04/09/2010, 11:30
-
Prof. Francois Montanet (LPSC IN2P3/CNRS Univ. Grenoble)04/09/2010, 12:15
-
Bernd Stelzer (Simon Fraser University-Unknown-Unknown)04/09/2010, 13:00
-
04/09/2010, 13:15
-
Mr John Alison (University of Pennsylvania)PosterPosterATLAS is a multipurpose experiment that records the products of the LHC proton‐proton collisions. In order to reconstruct the trajectories of charged particles, ATLAS is equipped with an inner tracking system built on silicon planar sensors (pixel and microstrips) plus drift‐tube based detectors, all embedded in a 2 T solenoidal field. In order to achieve its scientific goals, the...Go to contribution page
-
PosterPosterIn order to cope with the large rate of proton collisions at the LHC, the ATLAS experiment is equipped with a complex three level trigger system, where the first level (L1) is entirely implemented in custom built hardware and the two successive levels (referred together as High Level Triggers - HLT) are software selection algorithms running on large PC farms. Since March 30, 2010, the...Go to contribution page
-
Ruslan Asfandiyarov (Wisconsin-Madison)PosterPosterHiggs decay to WW leading to a final state of 2 leptons and missing energy constitutes one of the main Higgs search channels at the LHC. A major background to the signal comes from W+jets events with a leptonic decay of the W and a jet faking a lepton. We discuss methods to estimate such a background shape and...Go to contribution page
-
Mr Steffen Roecker (KIT)PosterPosterThe first long physics run of LHC is taking place at a center-of-mass energy of 7 TeV, and is expected to go on until an integrated luminosity of 1/fb will have been collected. We present an analysis technique to measure the t-channel cross section for single top-quark production in CMS, that can confirm the recent observation of single-top quark production by the Tevatron experiments. Events...Go to contribution page
-
Dr Fedor Ratnikov (KIT, Karlsruhe)PosterPosterWe present the first results of a search for long-lived gluinos which have stopped in the Compact Muon Solenoid detector after being produced in 7 TeV pp collisions from CERN's Large Hadron Collider. We looked for the subsequent decay of these particles during time intervals where there were no pp collisions in the Compact Muon Solenoid experiment. In particular, we searched for decays during...Go to contribution page
-
13. Jet production cross-section and jet properties in pp at sqrt(s) = 7 TeV with the ATLAS detectorfrancesc vivesPosterPosterMaking use of the excellent calorimetry of the ATLAS experiment, measurements of the cross-section for jet production and of jet properties in proton-proton interactions at sqrt(s) = 7 TeV will be presented. The corrected and unfolded inclusive cross-section for high-pT jets will be described, together with the cross-section as a function of the invariant di-jet mass. Special emphasis...Go to contribution page
-
Sarah Beranek (I. Physikalisches Institut (B)-RWTH Aachen)PosterPosterThe first measurements of the J/psi and Upsilon production cross sections in proton-proton collisions at 7 TeV, as measured by the CMS experiment using the dimuon decay channel are presented. For the J/psi we give the inclusive and the prompt differential cross sections versus transverse momentum. For the Upsilon, we present the 1S cross section versus transverse momentum and the...Go to contribution page
-
Markus Röhrken (Karlsruhe Institute of Technology)PosterPosterWe report a measurement of the branching fraction of $B^0 \rightarrow D^+ D^-$ decays. The result is based on a data sample that contains $535\times10^6$ $B\bar B$ pairs collected on the $\Upsilon(4S)$ resonance with the Belle detector at the asymmetric-energy KEKB $e^+ e^-$ collider. We obtain $(2.32\pm0.25\pm0.29)\times10^{-4}$ for the branching fraction of $B^0 \rightarrow D^+ D^-$...Go to contribution page
-
Daniel Cedric Troendle (CMS)PosterPosterA measurement of the open beauty production cross section in proton-proton collisions at center-of-mass-energy of 7TeV is presented. The dataset was recorded with the CMS Experiment at the Large Hadron Collider(CERN). Events are selected by the presence of one muon. The transverse momentum of the muon with respect to the closest track jet discriminates b events from background. The open beauty...Go to contribution page
-
Mr Oliver Oberst (KIT - Institut für Experimentelle Kernphysik)PosterPosterThe measurement of the inclusive jet cross section from pp collisions at a center-of-mass energy of s = 7 TeV using data collected by the CMS experiment with an integrated luminosity of about 60 nb−1 and in the pT range of 18-700 GeV is presented. Several different jet reconstruction methods are investigated using an anti-kT clustering algorithm. Studies of the systematic uncertainties in...Go to contribution page
-
Manuel Zeise (EKP, Karlsruhe)PosterPosterFirst measurements of inclusive Z production cross sections in muon and electron decay channels at 7 TeV are presented for proton-proton collisions in the Compact Muon Solenoid (CMS) detector at the Large Hadron Collider (LHC). The comparison of the kinematic quantities as well as the studies of selection efficiencies demonstrate a good agreement between simulated events and current data. The...Go to contribution page
-
Alexander GolossanovPosterPoster
-
Yvonne Küssel ((III. Physikalisches Institut (B)-Rheinisch-Westfaelische Tech. Hochschule Aachen))PosterPosterWith a projected design luminostity of 10^{34} cm^{-2}s^{-1} the LHC will provide about 10^9 proton collisions per second within the CMS detector. Thus, an efficient trigger system to select interesting events is essential. A good knowledge of these trigger efficiencies is inevitable, e.g. for cross section measurements. This study presents data-driven approaches applied to first 7 TeV data to...Go to contribution page
-
Mrs Yvonne Küssel (III. Physikalisches Institut (B)-Rheinisch-Westfaelische Tech. Hochschule Aachen)PosterPosterWe review the options for performing user analysis at CMS. The recent work emphasized the improvement of the Physics Analysis Toolkit (PAT), a high-level analysis layer enabling the development of common analysis efforts across and within Physics Analysis Groups. PAT aims at fulfilling the needs of most CMS analyses, providing both ease-of-use for the beginner and flexibility for the advanced...Go to contribution page
-
83. Photon reconstruction and identification with the CMS detector in pp collisions at sqrt(s)=7 TeVMs Sudha Ahuja (Cen. Detect. & Related Softw. Tech. (CDRST)-Department of Physic)PosterPosterThe performance of photon reconstruction and identification has been studied at sqrt(s) = 7 TeV. Reconstruction and identification variables as well as isolation have been compared between data and Monte Carlo for signal and background. Level 1 Trigger and High Level Trigger efficiencies have been measured.Go to contribution page
-
Eva Barbara Ziebarth (Inst. fuer Experimentelle Kernphys. - KIT)PosterPosterThe neutralino is the lightest supersymmetric particle in many SUSY models. Thus in R parity conserving models it provides a perfect dark matter candidate by being electromagnetically neutral, weakly interacting and stable. Following cosmological models, at the freeze-out time most neutralinos should have been transformed into standard model particles by annihilation. The annihilation cross...Go to contribution page
-
Dr Fedor Ratnikov (KIT, Karlsruhe)PosterPosterA signature-based search is performed for heavy stable charged particles (HSCPs) produced in pp collisions at sqrt(s) = 7 TeV, and collected with the CMS detector, using high transverse momentum muon, jet, and missing transverse energy trigger data. Momentum and ionization energy loss measurements are used to isolate candidate events with slowly moving, heavy particles. The presentation...Go to contribution page
-
Paolo Rumerio (University of Maryland)PosterPosterThe LHC has started accumulating data at a center-of-mass energy of 7 TeV. We look at the consistency of data samples containing high transverse momentum electrons and muons for their consistency with predicts for production of standard model particles. We look at the expectations for exotic new particles, such as leptoquarks, for this data.Go to contribution page
-
Ms Pooja Saxena (Delhi University)PosterPosterSilicon Detector (SiD) is one of the proposed detector for future e+-e- Linear colliders, like International Linear Collider (ILC). The estimated neutron background for ILC is around 1 - 1.6 x 10^10 1-MeV equivalent neutrons cm-2 year-1 for the Si micro strip sensors to be used in the innermost vertex detector. The p+n-n+ double-sided Si strip sensors are supposed to be used as position...Go to contribution page
-
Dr Gurjav Ganbold (JINR, Dubna)PosterPosterThe behavior of QCD effective coupling is studied in the low-energy region within a relativistic quantum-field model based on analytical confinement. The spectra of two-quark and two-gluon bound states are defined by using the Bethe-Salpeter equation and compared with conventional meson masses. A new, independent and specific infrared-finite behavior of QCD coupling is revealed...Go to contribution page
-
Dr Michael Wurm (TU München)PosterPosterBorexino is the first experiment succeeding in a real-time measurement of solar neutrinos in the sub-MeV energy region. Based on the unprecedented radiopurity of the 300-ton liquid-scintillator target and the surrounding detector materials, and due to the extensive rock shielding provided in the Gran Sasso National Laboratory (LNGS), Borexino has allowed to study neutrinos from various sources...Go to contribution page
-
Michael Heinrich (Inst. fuer Experimentelle Kernphys. - Universitaet Karlsruhe)PosterPosterThe first measurement of the charged component of the Underlying Event using the recently proposed jet area/median approach is presented for proton-proton collisions. The sensitivity to different generator tunes is demonstrated for charged particle jets after applying detector specific selection criteria and thresholds. The subsequent comparison of uncorrected CMS data with predictions of...Go to contribution page
-
Maria Aldaya (CIEMAT)PosterPoster
-
Anna Kaczmarska for the ATLAS SC (IFJ PAN, Krakow, Poland)PosterPosterTop-quark pairs are expected to be produced copiously at the LHC, even at the lower beam energy and luminosity expected in the first years of running. Establishing the top-pair signal and measuring the production cross-section are important benchmarks for ATLAS, and will help understand the detector performance for events with high-pT leptons, high jet multiplicity, missing transverse...Go to contribution page
-
Dr Thorsten Chwalek (KIT)PosterPosterThe top quark is the heaviest known fermion in the standard model. Due to its large production cross section, pairs of top and antitop quarks will be copiously produced in high energy proton-proton collisions at the Large Hadron Collider (LHC). The event selection deemed for the selection of ttbar events is applied to an early data set of proton-proton collisions at sqrt(s) = 7 TeV. The...Go to contribution page
Choose timezone
Your profile timezone: