Luminosity determination in pp collisions at √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 √s = 7 TeV are presented. The luminosity is independently determined using several detectors and multiple algorithms, each having different acceptances, systematic uncertainties an...

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Autor principal: Multitudinario:3082
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Acceso en línea:http://hdl.handle.net/20.500.12110/paper_14346044_v71_n4_p1_Multitudinario
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_14346044_v71_n4_p1_Multitudinario2023-10-03T16:14:42Z Luminosity determination in pp collisions at √s = 7 TeV using the ATLAS detector at the LHC Multitudinario:3082 Measurements of luminosity obtained using the ATLAS detector during early running of the Large Hadron Collider (LHC) at √s = 7 TeV are presented. The luminosity is independently determined using several detectors and multiple algorithms, each having different acceptances, systematic uncertainties and sensitivity to background. The ratios of the luminosities obtained from these methods are monitored as a function of time and of μ, the average number of inelastic interactions per bunch crossing. Residual time- and μ-dependence between the methods is less than 2% for 0 < μ < 2.5. Absolute luminosity calibrations, performed using beam separation scans, have a common systematic uncertainty of ±11%, dominated by the measurement of the LHC beam currents. After calibration, the luminosities obtained from the different methods differ by at most ±2%. The visible cross sections measured using the beam scans are compared to predictions obtained with the PYTHIA and PHOJET event generators and the ATLAS detector simulation. © CERN for the benefit of the ATLAS collaboration 2011. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_14346044_v71_n4_p1_Multitudinario
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description Measurements of luminosity obtained using the ATLAS detector during early running of the Large Hadron Collider (LHC) at √s = 7 TeV are presented. The luminosity is independently determined using several detectors and multiple algorithms, each having different acceptances, systematic uncertainties and sensitivity to background. The ratios of the luminosities obtained from these methods are monitored as a function of time and of μ, the average number of inelastic interactions per bunch crossing. Residual time- and μ-dependence between the methods is less than 2% for 0 < μ < 2.5. Absolute luminosity calibrations, performed using beam separation scans, have a common systematic uncertainty of ±11%, dominated by the measurement of the LHC beam currents. After calibration, the luminosities obtained from the different methods differ by at most ±2%. The visible cross sections measured using the beam scans are compared to predictions obtained with the PYTHIA and PHOJET event generators and the ATLAS detector simulation. © CERN for the benefit of the ATLAS collaboration 2011.
format JOUR
author Multitudinario:3082
spellingShingle Multitudinario:3082
Luminosity determination in pp collisions at √s = 7 TeV using the ATLAS detector at the LHC
author_facet Multitudinario:3082
author_sort Multitudinario:3082
title Luminosity determination in pp collisions at √s = 7 TeV using the ATLAS detector at the LHC
title_short Luminosity determination in pp collisions at √s = 7 TeV using the ATLAS detector at the LHC
title_full Luminosity determination in pp collisions at √s = 7 TeV using the ATLAS detector at the LHC
title_fullStr Luminosity determination in pp collisions at √s = 7 TeV using the ATLAS detector at the LHC
title_full_unstemmed Luminosity determination in pp collisions at √s = 7 TeV using the ATLAS detector at the LHC
title_sort luminosity determination in pp collisions at √s = 7 tev using the atlas detector at the lhc
url http://hdl.handle.net/20.500.12110/paper_14346044_v71_n4_p1_Multitudinario
work_keys_str_mv AT multitudinario3082 luminositydeterminationinppcollisionsats7tevusingtheatlasdetectoratthelhc
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