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120 Result(s)
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Article
Open AccessThe ATLAS Inner Detector commissioning and calibration
The ATLAS Inner Detector is a composite tracking system consisting of silicon pixels, silicon strips and straw tubes in a 2 T magnetic field. Its installation was completed in August 2008 and the detector took...
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Open AccessMeasurement of inclusive jet and dijet cross sections in proton-proton collisions at 7 TeV centre-of-mass energy with the ATLAS detector
Jet cross sections have been measured for the first time in proton-proton collisions at a centre-of-mass energy of 7 TeV using the ATLAS detector. The measurement uses an integrated luminosity of 17 nb−1 recorded...
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Open AccessLuminosity determination in pp collisions at \(\sqrt{s} = 7\) TeV using the ATLAS detector at the LHC
Measurements of luminosity obtained using the ATLAS detector during early running of the Large Hadron Collider (LHC) at \(\sqrt{s} = 7\) ...
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Open AccessMeasurements of underlying-event properties using neutral and charged particles in pp collisions at \(\sqrt{s}=900\) GeV and \(\sqrt{s}=7\) TeV with the ATLAS detector at the LHC
We present first measurements of charged and neutral particle-flow correlations in pp collisions using the ATLAS calorimeters. Data were collected in 2009 and 2010 at centre-of-mass energies of 900 GeV and 7 TeV....
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Open AccessSearch for supersymmetric particles in events with lepton pairs and large missing transverse momentum in \(\sqrt{s}=7~\mbox{TeV}\) proton–proton collisions with the ATLAS experiment
Results are presented of searches for the production of supersymmetric particles decaying into final states with missing transverse momentum and exactly two isolated leptons in
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Open AccessSearch for an excess of events with an identical flavour lepton pair and significant missing transverse momentum in \(\sqrt{s}=7\) TeV proton–proton collisions with the ATLAS detector
Results are presented of a search for particles decaying into final states with significant missing transverse momentum and exactly two identical flavour leptons (e, μ) of opposite charge in
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Open AccessLimits on the production of the standard model Higgs boson in pp collisions at \(\sqrt{s} = 7\) TeV with the ATLAS detector
A search for the Standard Model Higgs boson at the Large Hadron Collider (LHC) running at a centre-of-mass energy of 7 TeV is reported, based on a total integrated luminosity of up to 40 pb−1 collected by the ATL...
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Open AccessSearch for diphoton events with large missing transverse energy with 36 pb−1 of 7 TeV proton–proton collision data with the ATLAS detector
Making use of 36 pb−1 of proton–proton collision data at \(\sqrt{s} =7\) TeV, the ATLAS Collaboration has performed a search for ...
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Article
Open AccessMeasurement of multi-jet cross sections in proton–proton collisions at a 7 TeV center-of-mass energy
Inclusive multi-jet production is studied in proton–proton collisions at a center-of-mass energy of 7 TeV, using the ATLAS detector. The data sample corresponds to an integrated luminosity of 2.4 pb−1. Results on...
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Article
Open AccessMeasurement of the jet fragmentation function and transverse profile in proton–proton collisions at a center-of-mass energy of 7 TeV with the ATLAS detector
The jet fragmentation function and transverse profile for jets with 25 GeV<p T jet<500 GeV and |η jet|<1.2 produced in proton–proton collisions with a center-of-mass energy of 7 TeV are presented. The measurement...
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Article
Open AccessSearch for a heavy neutral particle decaying into an electron and a muon using 1 fb−1 of ATLAS data
A search is presented for a high mass neutral particle that decays directly to the e ± μ ∓ final state. The data sample was recorded by the ATLAS detector in ...
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Article
Open AccessSearch for massive colored scalars in four-jet final states in \(\sqrt{s}=7~\mbox{TeV}\) proton–proton collisions with the ATLAS detector
A search for pair-produced scalar particles decaying to a four-jet final state is presented. The analysis is performed using an integrated luminosity of 34 pb−1 recorded by the ATLAS detector in 2010. No deviatio...
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Article
Open AccessMeasurement of the inclusive and dijet cross-sections of b-jets in pp collisions at \(\sqrt{s}=7\mbox{~TeV}\) with the ATLAS detector
The inclusive and dijet production cross-sections have been measured for jets containing b-hadrons (b-jets) in proton–proton collisions at a centre-of-mass energy of
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Article
Open AccessPerformance of the ATLAS Trigger System in 2010
Proton–proton collisions at \(\sqrt{s}=7\) TeV and heavy ion collisions at ...
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Open AccessPerformance of missing transverse momentum reconstruction in proton-proton collisions at \(\sqrt{s} = 7~\mbox{TeV}\) with ATLAS
The measurement of missing transverse momentum in the ATLAS detector, described in this paper, makes use of the full event reconstruction and a calibration based on reconstructed physics objects. The performan...
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Article
Open AccessElectron performance measurements with the ATLAS detector using the 2010 LHC proton-proton collision data
Detailed measurements of the electron performance of the ATLAS detector at the LHC are reported, using decays of the Z, W and J/ψ particles. Data collected in 2010 at
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Article
Open AccessRapidity gap cross sections measured with the ATLAS detector in pp collisions at \(\sqrt{s} = 7 \mbox{~TeV}\)
Pseudorapidity gap distributions in proton-proton collisions at \(\sqrt {s} =7~\mbox{~TeV}\) are studied using a minimum bias dat...
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Open AccessSearch for anomaly-mediated supersymmetry breaking with the ATLAS detector based on a disappearing-track signature in pp collisions at \(\sqrt{s} = 7~\mathrm{TeV}\)
In models of anomaly-mediated supersymmetry breaking (AMSB), the lightest chargino is predicted to have a lifetime long enough to be detected in collider experiments. This letter explores AMSB scenarios in pp col...
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Open AccessMeasurement of the polarisation of W bosons produced with large transverse momentum in pp collisions at \(\sqrt{s} = 7\ \mbox{TeV}\) with the ATLAS experiment
This paper describes an analysis of the angular distribution of W→eν and W→μν decays, using data from pp collisions at $\sqrt{s} = 7\ \mbox{Te...
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Article
Open AccessCentrality dependence of dihadron correlations and azimuthal anisotropy harmonics in PbPb collisions at \(\sqrt{s_{NN}}= 2.76\ \mbox{TeV}\)
Measurements from the CMS experiment at the LHC of dihadron correlations for charged particles produced in PbPb collisions at a nucleon–nucleon centre-of-mass energy of 2.76 TeV are presented. The results are ...