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  • PhysRevLett.110.022301

    Rights statement: Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. © 2013 CERN, for the ATLAS Collaboration

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Measurement of Z Boson Production in Pb-Pb Collisions at sNN−−−−√=2.76  TeV with the ATLAS Detector

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Article number022301
<mark>Journal publication date</mark>8/01/2013
<mark>Journal</mark>Physical review letters
Issue number2
Volume110
Number of pages18
Publication StatusPublished
<mark>Original language</mark>English

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.

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Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. © 2013 CERN, for the ATLAS Collaboration