CMS-PAS-HIN-13-004

CMS-PAS-HIN-13-004
Z boson production with the 2011 data in PbPb collisions
CMS Collaboration
2013

Abstract: This paper presents the measurement of $Z$ bosons in the dimuon and dielecton channels in PbPb collisions made by the CMS experiment at the LHC at $\sqrt{s_{NN}} = 2.76$ ~TeV. The analysis is based on a data sample collected during the PbPb run in 2011, which corresponds to an integrated luminosity of about 150~ $\mu$ b $^{-1}$ and on the pp data sample collected during 2013 with an integrated luminosity of $L_{int} = 5.4$ ~pb $^{-1}$ . The nuclear modification factor $R_{\rm AA}$ is calculated and found to be consistent with unity for all $Z$ -boson rapidity and transverse momentum, as well as PbPb reaction centrality, showing that $Z$ production scales with the number of incoherent nucleon-nucleon collisions.
Links: CDS record (PDF) ; inSPIRE record ; Public twiki page ; CADI line (restricted) ; Figures are available from the CDS record. These preliminary results are superseded in this paper, JHEP 03 (2015) 022.

Compact Muon Solenoid
LHC, CERN