Measurement of Z boson Production in Pb+Pb Collisions at √ sNN = 2.76 TeV with the ATLAS Detector

The ATLAS collaboration

Research output: Contribution to journalArticle

Abstract


The ATLAS experiment has observed 1995 Z boson candidates in data corresponding to 0.15  nb-1 of integrated luminosity obtained in the 2011 LHC Pb+Pb run at sNN=2.76  TeV. The Z bosons are reconstructed via dielectron and dimuon decay channels, with a background contamination of less than 3%. Results from the two channels are consistent and are combined. Within the statistical and systematic uncertainties, the per-event Z boson yield is proportional to the number of binary collisions estimated by the Glauber model. The elliptic anisotropy of the azimuthal distribution of the Z boson with respect to the event plane is found to be consistent with zero.
Original languageEnglish (US)
JournalPhysical Review Letters
Volume110
Issue number2
StatePublished - 2013

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