2014/10/31 by CMS Collaboration, S. Chatrchyan, V. Khachatryan +98 · 3 citations
Physics and Astronomy · #Astrophysics #Boson #Galaxy #High-Energy Particle Collisions Research #Inverse #Large Hadron Collider #Luminosity #Nuclear physics #Nucleon #Particle physics #Particle physics theoretical and experimental studies #Physics #Production (economics) #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quark–gluon plasma #Rapidity #hep-ex #nucl-ex
paper · pdf · doi:10.1007/jhep03(2015)022
published as JHEP 03 (2015) 022 · Replaced with published version. Added journal reference and DOI
openalex publication_date 2015/03/01 · arxiv created 2015/04/15 · arxiv updated 2015/04/17 · openalex created_date 2018/08/22 · openalex updated_date 2026/08/05
The production of Z bosons is studied in the dimuon and dielectron decay channels in PbPb and pp collisions at s NN = 2.76 TeV, using data collected by the CMS experiment at the LHC. The PbPb data sample corresponds to an integrated luminosity of about 166 b -1 , while the pp data sample collected in 2013 at the same nucleon-nucleon centre-of-mass energy has an integrated luminosity of 5.4 pb -1 . The Z boson yield is measured as a function of rapidity, transverse momentum, and collision centrality. The ratio of PbPb to pp yields, scaled by the number of inelastic nucleon-nucleon collisions, is found to be 1.06 0.05 (stat) 0.08 (syst) in the dimuon channel and 1.02 0.08 (stat) 0.15 (syst) in the dielectron channel, for centrality-integrated Z boson production. This binary collision scaling is seen to hold in the entire kinematic region studied, as expected for a colourless probe that is unaffected by the hot and dense QCD medium produced in heavy ion collisions.