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Measurement of the Production and Lepton Charge Asymmetry of W Bosons in Pb+Pb Collisions at √sNN = 2.76 TeV With the ATLAS Detector

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10.1140%2Fepjc%2Fs10052-014-3231-6.pdf (17.95 MB)

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2015

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10.1140/epjc/s10052-014-3231-6

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Springer Nature
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ATLAS Collaboration. 2015. “Measurement of the Production and Lepton Charge Asymmetry of W Bosons in Pb+Pb Collisions at √sNN = 2.76 TeV With the ATLAS Detector.” The European Physical Journal C 75 (1) (January). doi:10.1140/epjc/s10052-014-3231-6.

Abstract

A measurement of W boson production in lead-lead collisions at √sNN=2.76 TeV is presented. It is based on the analysis of data collected with the ATLAS detector at the LHC in 2011 corresponding to an integrated luminosity of 0.14 nb–1 and 0.15 nb–1 in the muon and electron decay channels, respectively. The differential production yields and lepton charge asymmetry are each measured as a function of the average number of participating nucleons (Npart) and absolute pseudorapidity of the charged lepton. The results are compared to predictions based on next-to-leading-order QCD calculations. As a result, these measurements are, in principle, sensitive to possible nuclear modifications to the parton distribution functions and also provide information on scaling of W boson production in multi-nucleon systems.

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http://nrs.harvard.edu/urn-3:HUL.InstRepos:33840767

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