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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Publicado: 2011
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14346044_v71_n4_p1_Multitudinario
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 paper:paper_14346044_v71_n4_p1_Multitudinario2023-06-08T16:14:45Z 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 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. 2011 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14346044_v71_n4_p1_Multitudinario 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.
title Luminosity determination in pp collisions at √s = 7 TeV using the ATLAS detector at the LHC
spellingShingle 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
publishDate 2011
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14346044_v71_n4_p1_Multitudinario
http://hdl.handle.net/20.500.12110/paper_14346044_v71_n4_p1_Multitudinario
_version_ 1768543528963538944

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