Measurement of Z boson Production in Lead-Lead Collisions at sNN=2.76 TeV with the ATLAS Detector

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Abstract

The ATLAS experiment has observed 1995 Z boson candidates from an integrated luminosity 0.15nb -1 collected in the 2011 LHC Pb + Pb run at sNN=2.76 TeV. The Z bosons are reconstructed via di-electron and di-muon decay channels. The results from both channels are consistent with each other and are combined. The background is less than 3% of the selected sample. Within the statistical and systematic uncertainties, the per-event Z boson yield integrated over rapidity |y Z| < 2.5 is proportional to the number of binary collisions estimated by the Glauber model. The elliptic flow coefficient of the azimuthal distribution of the Z boson with respect to the event plane is consistent with zero.

Original languageEnglish
Pages (from-to)379-382
Number of pages4
JournalNuclear Physics A
Volume910-911
DOIs
StatePublished - 2 Aug 2013

Keywords

  • Heavy-ion Collisions
  • Z bosons

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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