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Luminosity determination in pp collisions at s=7 TeV using the ATLAS detector at the LHC

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dc.contributor.author The ATLAS Collaboration
dc.contributor.author Aad, G.
dc.contributor.author Abbott, B.
dc.contributor.author Abdallah, J.
dc.contributor.author Abdelalim, A. A.
dc.contributor.author Buanes, Trygve
dc.date.accessioned 2011-11-29T13:30:31Z
dc.date.available 2011-11-29T13:30:31Z
dc.date.issued 2011-04-27
dc.identifier.citation European Physical Journal C: Particles and Fields 71(4): 1630 en
dc.identifier.issn 1434-6044
dc.identifier.uri http://dx.doi.org/10.1140/epjc/s10052-011-1630-5
dc.identifier.uri http://hdl.handle.net/1956/5255
dc.description There are approximately 2250 authors. Only a few of them have been given author entries in addition to the Collaboration. en
dc.description.abstract 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. en
dc.language.iso eng en
dc.publisher Springer en
dc.rights Copyright The Author(s) 2011 en
dc.rights.uri http://www.springer.com/open+access/open+choice?SGWID=0-40359-0-0-0 en
dc.title Luminosity determination in pp collisions at s=7 TeV using the ATLAS detector at the LHC en
dc.type Peer reviewed en
dc.type Journal article en
dc.subject.nsi VDP::Mathematics and natural science: 400::Physics: 430 en
dc.subject.nsi VDP::Mathematics and natural science: 400::Physics: 430::Nuclear and elementary particle physics: 431 en
dc.type.version publishedVersion en


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