Study of Z production in PbPb and pp collisions at root s(NN)=2.76 TeV in the dimuon and dielectron decay channels

Chatrchyan, S.; Adžić, Petar; Ekmedžić, Marko; Milošević, Jovan; Reković, Vladimir; Đorđević, Miloš; Milenović, Predrag

doi:10.1007/JHEP03(2015)022

2015

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Authors

Chatrchyan, S.
Adžić, Petar
Ekmedžić, Marko

CMS Collaboration (ukupan broj autora: 2132)

Article (Published version)

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Abstract

The production of Z bosons is studied in the dimuon and dielectron decay channels in PbPb and pp collisions at root s(NN) = 2.76TeV, using data collected by the CMS experiment at the LHC. The PbPb data sample corresponds to an integrated luminosity of about 166 mu 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.

Keywords:

Particle and resonance production / Heavy Ions / Heavy-ion collision / proton-proton scattering

Source:
Journal of High Energy Physics, 2015, 3

Funding / projects:

BMWFW (Austria), FWF (Austria), FNRS (Belgium), FWO (Belgium), CNPq (Brazil), CAPES (Brazil), FAPERJ (Brazil), FAPESP (Brazil), MES (Bulgaria), CERN, CAS (China), MoST (China), NSFC (China), COLCIENCIAS (Colombia), MSES (Croatia), CSF (Croatia), RPF (Cyprus), MoER (Estonia), ERC IUT (Estonia), ERDF (Estonia), Academy of Finland, MEC (Finland), HIP (Finland), CEA (France), CNRS/IN2P3 (France), BMBF, Germany, DFG (Germany), HGF (Germany), GSRT (Greece), OTKA (Hungary), NIH (Hungary), DAE (India), DST (India), IPM (Iran), SFI (Ireland), INFN (Italy), NRF (Republic of Korea), WCU (Republic of Korea), LAS (Lithuania), MOE (Malaysia), UM (Malaysia), CINVESTAV (Mexico), CONACYT (Mexico), SEP (Mexico), UASLP-FAI (Mexico), MBIE (New Zealand), PAEC (Pakistan), MSHE (Poland), NSC (Poland), FCT (Portugal), JINR (Dubna), MON (Russia), RosAtom (Russia), RAS (Russia), RFBR (Russia), MESTD (Serbia), SEIDI (Spain), CPAN (Spain), Swiss Funding Agencies (Switzerland), MST (Taipei), ThEPCenter (Thailand), IPST (Thailand), STAR (Thailand), NSTDA (Thailand), TUBITAK (Turkey), TAEK (Turkey), NASU (Ukraine), SFFR (Ukraine), STFC (United Kingdom), DOE (USA), NSF (USA), Marie-Curie programme, European Research Council, EPLANET (European Union), Leventis Foundation, A.P. Sloan Foundation, Alexander von Humboldt Foundation, Belgian Federal Science Policy Office, Fonds pour la Formation a la Recherche dans lIndustrie et dans lAgriculture (FRIA-Belgium), Agentschap voor Innovatie door Wetenschap en Technologie (IWT-Belgium), Ministry of Education, Youth and Sports (MEYS) of the Czech Republic, Council of Science and Industrial Research, India, HOMING PLUS programme of Foundation for Polish Science, European Union, Regional Development Fund, Compagnia di San Paolo (Torino), Consorzio per la Fisica (Trieste), MIUR project (Italy) [20108T4XTM], Thalis programme, Aristeia programme, EU-ESF, Greek NSRF, Qatar National Research Fund

DOI: 10.1007/JHEP03(2015)022

ISSN: 1029-8479

WoS: 000351363800005

Scopus: 2-s2.0-84924667085

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TY  - JOUR
AU  - Chatrchyan, S.
AU  - Adžić, Petar
AU  - Ekmedžić, Marko
AU  - Milošević, Jovan
AU  - Reković, Vladimir
AU  - Đorđević, Miloš
AU  - Milenović, Predrag
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/457
AB  - The production of Z bosons is studied in the dimuon and dielectron decay channels in PbPb and pp collisions at root s(NN) = 2.76TeV, using data collected by the CMS experiment at the LHC. The PbPb data sample corresponds to an integrated luminosity of about 166 mu 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.
T2  - Journal of High Energy Physics
T1  - Study of Z production in PbPb and pp collisions at root s(NN)=2.76 TeV in the dimuon and dielectron decay channels
IS  - 3
DO  - 10.1007/JHEP03(2015)022
ER  -

@article{
author = "Chatrchyan, S. and Adžić, Petar and Ekmedžić, Marko and Milošević, Jovan and Reković, Vladimir and Đorđević, Miloš and Milenović, Predrag",
year = "2015",
abstract = "The production of Z bosons is studied in the dimuon and dielectron decay channels in PbPb and pp collisions at root s(NN) = 2.76TeV, using data collected by the CMS experiment at the LHC. The PbPb data sample corresponds to an integrated luminosity of about 166 mu 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.",
journal = "Journal of High Energy Physics",
title = "Study of Z production in PbPb and pp collisions at root s(NN)=2.76 TeV in the dimuon and dielectron decay channels",
number = "3",
doi = "10.1007/JHEP03(2015)022"
}

Chatrchyan, S., Adžić, P., Ekmedžić, M., Milošević, J., Reković, V., Đorđević, M.,& Milenović, P.. (2015). Study of Z production in PbPb and pp collisions at root s(NN)=2.76 TeV in the dimuon and dielectron decay channels. in Journal of High Energy Physics(3).
https://doi.org/10.1007/JHEP03(2015)022

Chatrchyan S, Adžić P, Ekmedžić M, Milošević J, Reković V, Đorđević M, Milenović P. Study of Z production in PbPb and pp collisions at root s(NN)=2.76 TeV in the dimuon and dielectron decay channels. in Journal of High Energy Physics. 2015;(3).
doi:10.1007/JHEP03(2015)022 .

Chatrchyan, S., Adžić, Petar, Ekmedžić, Marko, Milošević, Jovan, Reković, Vladimir, Đorđević, Miloš, Milenović, Predrag, "Study of Z production in PbPb and pp collisions at root s(NN)=2.76 TeV in the dimuon and dielectron decay channels" in Journal of High Energy Physics, no. 3 (2015),
https://doi.org/10.1007/JHEP03(2015)022 . .