Study of Z production in PbPb and pp collisions at $ \sqrt{s_{\mathrm{NN}}}=2.76 $ TeV in the dimuon and dielectron decay channels

Chatrchyan, Serguei

doi:10.1007/JHEP03(2015)022

Title: Study of Z production in PbPb and pp collisions at $$ \sqrt{s_{\mathrm{NN}}}=2.76 $$ TeV in the dimuon and dielectron decay channels

Journal Article · Wed Mar 04 00:00:00 EST 2015 · Journal of High Energy Physics (Online)

DOI:https://doi.org/10.1007/JHEP03(2015)022· OSTI ID:1234857

Chatrchyan, Serguei ^[1]

Yerevan Physics Inst. (YerPhI) (Armenia). et al.

We found that 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 μb^-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. Finally, 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.

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Research Organization:: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP)

Contributing Organization:: CMS Collaboration

Grant/Contract Number:: AC02-07CH11359

OSTI ID:: 1234857

Report Number(s):: FERMILAB-PUB-14-441-CMS; CERN-PH-EP-2014-235; CMS-HIN-13-004; arXiv eprint number arXiv:1410.4825; TRN: US1500043

Journal Information:: Journal of High Energy Physics (Online), Vol. 2015, Issue 3; ISSN 1029-8479

Publisher:: Springer BerlinCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 43 works

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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
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Study of Z production in PbPb and pp collisions at $\sqrt{s_{N N}} = 2.76$ TeV in the dimuon and dielectron decay channels [Supplemental Data] https://doi.org/10.17182/hepdata.66612 The current record is supplemented by this dataset	dataset	March 2015
Study of Z production in PbPb and pp collisions at $ \sqrt{s_{\mathrm{NN}}}=2.76 $ TeV in the dimuon and dielectron decay channels [Supplemental Data] Chatrchyan, Serguei; Khachatryan, Vardan; Sirunyan, Albert M. https://doi.org/10.17182/hepdata.66612.v1 The current record is supplemented by this dataset	dataset	February 2015
"Table 11" of "Study of Z production in PbPb and pp collisions at sqrt(s[NN]) = 2.76 TeV in the dimuon and dielectron decay channels" Collaboration, Cms https://doi.org/10.17182/hepdata.66612.v1/t11 The current record is supplemented by this dataset	dataset	January 2015
"Table 13" of "Study of Z production in PbPb and pp collisions at sqrt(s[NN]) = 2.76 TeV in the dimuon and dielectron decay channels" Collaboration, Cms https://doi.org/10.17182/hepdata.66612.v1/t13 The current record is supplemented by this dataset	dataset	January 2015
"Table 4" of "Study of Z production in PbPb and pp collisions at sqrt(s[NN]) = 2.76 TeV in the dimuon and dielectron decay channels" Collaboration, Cms https://doi.org/10.17182/hepdata.66612.v1/t4 The current record is supplemented by this dataset	dataset	January 2015
"Table 8" of "Study of Z production in PbPb and pp collisions at sqrt(s[NN]) = 2.76 TeV in the dimuon and dielectron decay channels" Collaboration, Cms https://doi.org/10.17182/hepdata.66612.v1/t8 The current record is supplemented by this dataset	dataset	January 2015
"Table 9" of "Study of Z production in PbPb and pp collisions at sqrt(s[NN]) = 2.76 TeV in the dimuon and dielectron decay channels" Collaboration, Cms https://doi.org/10.17182/hepdata.66612.v1/t9 The current record is supplemented by this dataset	dataset	January 2015