CERN Accelerating science

Article
Report number arXiv:1101.2185 ; CERN-PH-EP-2010-069 ; CERN-PH-EP-2010-069
Title Luminosity Determination in pp Collisions at s = 7 TeV using the ATLAS Detector at the LHC
Related titleLuminosity Determination in pp Collisions at sqrt(s)=7 TeV Using the ATLAS Detector at the LHC
Author(s) ATLAS Collaboration  显示全部 3082 名作者
Publication 2011
Imprint 21 Jan 2011
Number of pages 24
Note Comments: 24 pages plus author list (36 pages total). 9 Figures, 10 Tables, submitted to Journal EPJC
24 pages plus author list (36 pages total). 9 Figures, 10 Tables, submitted to Journal EPJC
In: Eur. Phys. J. C 71 (2011) 1630
DOI 10.1140/epjc/s10052-011-1630-5
Subject category Particle Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; ATLAS
Abstract Measurements of luminosity obtained using the ATLAS detector during early running of the Large Hadron Collider (LHC) at sqrt(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 mu, the average number of inelastic interactions per bunch crossing. Residual time- and mu-dependence between the methods is less than 2% for 0<mu<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.
Copyright/License publication: © 2011-2024 CERN (License: CC-BY-3.0)
preprint: © 2011-2024 CERN (License: CC-BY-3.0)



Corresponding record in: Inspire
Email contact: giuseppe.iacobucci@cern.ch


 记录创建於2011-01-21,最後更新在2024-03-14


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