Study of Z production in PbPb and pp collisions at √s[subscript NN] = 2.76 TeV in the dimuon and dielectron decay channels

Study of Z production in PbPb and pp collisions at √s[subscript NN] = 2.76 TeV in the dimuon and dielectron decay channels

The production of Z bosons is studied in the dimuon and dielectron decay channels in PbPb and pp collisions at √s[subscript 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 μb[superscript −1], while the p...

Full description

Bibliographic Details
Main Authors: Apyan, Aram, Barbieri, Richard Alexander, Busza, Wit, Cali, Ivan Amos, Di Matteo, Leonardo, Dutta, Valentina, Gomez-Ceballos, Guillelmo, Goncharov, Maxim, Gulhan, Doga Can, Klute, Markus, Lai, Yue Shi, Lee, Yen-Jie, Levin, Andrew Michael, Ma, Teng, Paus, Christoph M. E., Ralph, Duncan Kelley, Stephans, George S. F., Velicanu, Dragos Alexandru, Veverka, Jan, Wyslouch, Boleslaw, Yang, Mingming, Zanetti, Marco, Wyslouch, Victoria, Bauer, Gerry P, Chan, M., Luckey Jr, P David, Roland, Christof E, Roland, Gunther M, Stoeckli, Fabian, Sumorok, Konstanty C
Other Authors: Massachusetts Institute of Technology. Department of Physics
Format: Article
Language:en_US
Published: Springer-Verlag 2015
Online Access:http://hdl.handle.net/1721.1/96841
https://orcid.org/0000-0002-3831-9071
https://orcid.org/0000-0003-3106-4894
https://orcid.org/0000-0001-6332-5839
https://orcid.org/0000-0001-8983-2169
https://orcid.org/0000-0002-1260-777X
https://orcid.org/0000-0002-9418-6656
https://orcid.org/0000-0002-6047-4211
https://orcid.org/0000-0002-7945-005X
https://orcid.org/0000-0003-3681-0649
https://orcid.org/0000-0003-1486-606X
https://orcid.org/0000-0003-2593-7767
https://orcid.org/0000-0001-9236-6621
https://orcid.org/0000-0002-0869-5631
https://orcid.org/0000-0002-1136-6900
Description
Summary:The production of Z bosons is studied in the dimuon and dielectron decay channels in PbPb and pp collisions at √s[subscript 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 μb[superscript −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[superscript −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.

Similar Items