Enlace del recurso
Enlace del recurso

“…ATLAS is one of the two multipurpose detectors at the Large Hadron Collider (LHC), which is going to provide proton-proton collisions at the unprecedented center-of-mass energy of 7 TeV. The ATLAS data-acquisition system is based on O(2k) processing nodes, interconnected by a multi-layer Gigabit network. …”
Enlace del recurso

“…First results on the observation of high-pT jets in pp collision at a center-of-mass energy of 7 TeV will be presented and kinematic distributions will be discussed.…”
Enlace del recurso

“…It is known today that a limiting factor towards 7 TeV operation is the normal conducting resistance of ~15% of the original main 13 kA interconnection splices, associated to the electrical continuity of the copper stabiliser. …”
Enlace del recurso

“…In this contribution we show the present understanding of the tau trigger system in recent proton-proton collisions at a center-of-mass energy of 7 TeV collected with the ATLAS detector. We present the most relevant quantities used in the different stages of the trigger selection, and the trigger efficiencies as a function of ET using tau-like QCD events passing the offline reconstruction and identification selection. …”
Enlace del recurso

“…The presentation concludes with a comparison of the ATLAS measurements to the ATLAS tune AMBT1 which provides a measuably improved description of the ATLAS data at 900 GeV and 7 TeV.…”
Enlace del recurso

“…The performance of muon identification in CMS has been studied on a sample of muons corresponding to an integrated luminosity of up to 84 nb$^{-1}$ collected in pp collisions at $\sqrt{s}$ = 7 TeV at the LHC. Measured distributions of basic muon-track quantities are well reproduced by the Monte Carlo simulation. …”
Enlace del recurso

“…The distributions of the corresponding observables - track impact parameters, secondary vertices and lepton momenta - were measured in pp collisions at $\sqrt{s}$ = 7\ TeV and found to be in agreement with the predictions of Monte Carlo simulation. …”
Enlace del recurso

“…We report a measurement of the inclusive b-jet production cross section from pp collisions at a center-of-mass energy of $\sqrt{s} = 7$~TeV using data collected by the CMS experiment with an integrated luminosity of 60~${\rm nb^{-1}}$. …”
Enlace del recurso

“…We report on a measurement of the inclusive jet cross section from pp collisions at a center-of-mass energy of $\sqrt{s} = $~7~TeV using data collected by the CMS experiment with an integrated luminosity of about 60~${\rm nb^{-1}}$ and in the $\pt$ range of 18-700~GeV. …”
Enlace del recurso

“…A measurement of jet shapes and particle distributions within jets is presented using proton-proton collision data collected with the CMS detector at the Large Hadron Collider (LHC) at a centre-of-mass energy of 7 TeV. Jets are characterised by the relative amount of energy released in a cone around the jet axis and by the multiplicity and transverse momentum distributions of charged particles. …”
Enlace del recurso

“…A 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 corresponding to 198 nb$^{-1}$ of integrated luminosity. …”
Enlace del recurso

“…A search is performed for events consistent with top quark pair production in 280 nb^-1 of ATLAS pp collision data taken at sqrt(s)=7 TeV. Several candidate events are observed, in both the lepton plus jets and dilepton topologies. …”
Enlace del recurso

“…The latest measurements of the charged particle multiplicities with the ATLAS detector at center of mass energy of 900 GeV and 7 TeV are presented. The charged particles density, it's dependence on pseudo-rapidity and transverse momentum and it's correlation with the average transverse momentum is measured for events with at least two charged particles in the kinematic range |eta|<2.5 and pT > 100 MeV. …”
Enlace del recurso

“…We present results on charged hadron production in proton-proton collisions at the Large Hadron Collider and center of mass energies ps = 900 GeV and 7 TeV in the ATLAS Detector. Charged tracks are measured with high precision in the inner tracking system; track multiplicities, transverse momentum spectrum and the average track transverse momentum as a function of track multiplicity are compared to phenomenological models describing the soft QCD processes participating in the interaction. …”
Enlace del recurso

“…We present a measurement of the differential J/psi cross section and the ratio of prompt to non-prompt J/psis in 7 TeV proton-proton collisions. We find that the dependence of the cross section on J/psi pT and rapidity is well predicted by Pythia + NRQCD contributions. …”
Enlace del recurso

Enlace del recurso

“…In this note, we measure the fraction of dijet events in pp collisions at √s=7TeV that do not contain an additional jet in the rapidity region bounded by the dijet system. …”
Enlace del recurso

“…We present the performance of the ATLAS jet trigger using collision data acquired in April & May 2010 at a center-of-mass energy of 7~TeV. Results are shown for inclusive, dijet, and multijet efficiencies for the Level 1 (used to select events) and High-Level (running in pass-through mode) triggers, as well as for some dedicated trigger signatures.…”
Enlace del recurso

“…The results are based on re-scaling expectations from detailed analyses at 10 or 14 TeV using cross section ratios to arrive at the 7 TeV projections.…”
Enlace del recurso