• Open Access

Study of Z Boson Production in PbPb Collisions at sNN=2.76TeV

S. Chatrchyan et al. (CMS Collaboration)
Phys. Rev. Lett. 106, 212301 – Published 24 May 2011

Abstract

A search for Z bosons in the μ+μ decay channel has been performed in PbPb collisions at sNN=2.76TeV with the CMS detector at the LHC, in a 7.2μb1 data sample. The number of opposite-sign muon pairs observed in the 60120GeV/c2 invariant mass range is 39, corresponding to a yield per unit of rapidity (y) and per minimum bias event of [33.8±5.5(stat)±4.4(syst)]×108, in the |y|<2.0 range. Rapidity, transverse momentum, and centrality dependencies are also measured. The results agree with next-to-leading order QCD calculations, scaled by the number of incoherent nucleon-nucleon collisions.

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  • Received 1 March 2011

DOI:https://doi.org/10.1103/PhysRevLett.106.212301

This article is available 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.

© 2011 CERN, for the CMS Collaboration

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Vol. 106, Iss. 21 — 27 May 2011

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