A measurement of the material in the ATLAS inner detector using secondary hadronic interactions

Abstract

The ATLAS inner detector is used to reconstruct secondary vertices due to hadronic interactions of primary collision products, so probing the location and amount of material in the inner region of ATLAS. Data collected in 7 TeV pp collisions at the LHC, with a minimum bias trigger, are used for comparisons with simulated events. The reconstructed secondary vertices have spatial resolutions ranging from ~200 microns to 1 mm. The overall material description in the simulation is validated to within an experimental uncertainty of about 7%. This will lead to a better understanding of the reconstruction of various objects such as tracks, leptons, jets, and missing transverse momentum.

22 pages plus author list (41 pages total), 12 figures, 4 tables, final version to appear in Journal of Instrumentation

References in corpus (2)

• PYTHIA 6.4 Physics and Manual
• Expected Performance of the ATLAS Experiment - Detector, Trigger and Physics

Cited by in corpus (23)

• Jet energy measurement with the ATLAS detector in proton-proton collisions at sqrt(s) = 7 TeV
• Study of the material of the ATLAS inner detector for Run 2 of the LHC
• Electron performance measurements with the ATLAS detector using the 2010 LHC proton-proton collision data
• Electron and photon energy calibration with the ATLAS detector using LHC Run 1 data
• Measurement of the Higgs boson mass from the $H\to \gamma \gamma$ and $H\to Z{Z}^{\ast }\to 4\ell$ channels with the ATLAS detector using 25 fb${}^{-1}$ of $pp$ collision data
• Measurement of the $W$-boson mass in pp collisions at $\sqrt{s}=7$ TeV with the ATLAS detector
• Search for long-lived, weakly interacting particles that decay to displaced hadronic jets in proton-proton collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Charged-particle distributions in $\sqrt{s}=13$ TeV $pp$ interactions measured with the ATLAS detector at the LHC
• Keung-Senjanović process at LHC: from LNV to displaced vertices to invisible decays
• Search for magnetic monopoles and stable particles with high electric charges in 8 TeV $pp$ collisions with the ATLAS detector
• Transverse momentum, rapidity, and centrality dependence of inclusive charged-particle production in $\sqrt{s_{NN}}=5.02$ TeV p+Pb collisions measured by the ATLAS experiment
• Search for long-lived, heavy particles in final states with a muon and multi-track displaced vertex in proton-proton collisions at sqrt(s)=7 TeV with the ATLAS detector
• Measurement of jet charge in dijet events from sqrt(s)=8 TeV pp collisions with the ATLAS detector
• Measurement of chi_c1 and chi_c2 production with sqrt(s) = 7 TeV pp collisions at ATLAS
• A measurement of the calorimeter response to single hadrons and determination of the jet energy scale uncertainty using LHC Run-1 $pp$-collision data with the ATLAS detector
• Search for long-lived neutral particles produced in $pp$ collisions at $\sqrt{s}=13$ TeV decaying into displaced hadronic jets in the ATLAS inner detector and muon spectrometer
• Measurement of the Lambda_b lifetime and mass in the ATLAS experiment
• A measurement of material in the ATLAS tracker using secondary hadronic interactions in 7 TeV pp collisions
• Precision measurement of the structure of the CMS inner tracking system using nuclear interactions
• Mu_x boosted-bottom-jet tagging and Z-prime boson searches
• Investigating the Quantum Properties of Jets and the Search for a Supersymmetric Top Quark Partner with the ATLAS Detector
• Exotic Higgs decays into displaced jets at the LHeC
• Measurements of charged-particle distributions with the ATLAS detector