Study of W boson production in PbPb and pp collisions at root s(NN)=2.76 TeV
2012
Authors
Chatrchyan, S.Adžić, Petar
Đorđević, Miloš
Ekmedžić, Marko
Krpić, D.
Milošević, Jovan
Milenović, Predrag
Reković, Vladimir
CMS Collaboration (ukupan broj autora: 2202)
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A measurement is presented of W-boson production in PbPb collisions carried out at a nucleon-nucleon (NN) centre-of-mass energy root S-NN of 2.76 TeV at the LHC using the CMS detector. In data corresponding to an integrated luminosity of 7.3 mu b(-1), the number of W - GT mu v(mu) decays is extracted in the region of muon pseudorapidity vertical bar eta mu vertical bar LT 2.1 and transverse momentum p(T)(mu) GT 25 GeV/c. Yields of muons found per unit of pseudorapidity correspond to (159 +/- 10(stat.) +/- 12(syst.)) x 10(-8) W and (154 +/- 10(stat.) +/- 12(syst.)) x 10(-8) W- bosons per minimum-bias PbPb collision. The dependence of W production on the centrality of PbPb collisions is consistent with a scaling of the yield by the number of incoherent NN collisions. The yield of W bosons is also studied in a sample of pp interactions at root S = 2.76 TeV corresponding to an integrated luminosity of 231 nb(-1). The individual W+ and W- yields in PbPb and pp collisions are found to agree,... once the neutron and proton content in Pb nuclei is taken into account. Likewise, the difference observed in the dependence of the positive and negative muon production on pseudorapidity is consistent with next-to-leading-order perturbative QCD calculations. (c) 2012 CERN. Published by Elsevier B.V. All rights reserved.
Keywords:
CMS / Physics / Heavy-ions / W bosonsSource:
Physics Letters B, 2012, 715, 1-3, 66-87Funding / projects:
- FMSR (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), RPF (Cyprus), Academy of Sciences (Estonia), NICPB (Estonia), Academy of Finland, ME (Finland), HIP (Finland), CEA (France), BMBF, Germany, DFG (Germany), HGF (Germany), GSRT (Greece), OTKA (Hungary), NKTH (Hungary), DAE (India), DST (India), IPM (Iran), SFI (Ireland), INFN (Italy), NRF (Korea), WCU (Korea), LAS (Lithuania), CINVESTAV (Mexico), CONACYT (Mexico), SEP (Mexico), UASLP-FAI (Mexico), PAEC (Pakistan), SCSR (Poland), FCT (Portugal), JINR (Armenia), JINR (Belarus), JINR (Georgia), JINR (Ukraine), JINR (Uzbekistan), MST (Russia), MAE (Russia), MSTD (Serbia), MICINN (Spain), CPAN (Spain), Swiss Funding Agencies (Switzerland), NSC (Taipei), TUBITAK (Turkey), TAEK (Turkey), STFC (United Kingdom), DOE (USA), NSF (USA), Marie-Curie programme, European Research Council (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), Council of Science and Industrial Research, India, [CNRS/IN2P3]
DOI: 10.1016/j.physletb.2012.07.025
ISSN: 0370-2693; 1873-2445
WoS: 000308519000011
Scopus: 2-s2.0-84865345178
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VinčaTY - JOUR AU - Chatrchyan, S. AU - Adžić, Petar AU - Đorđević, Miloš AU - Ekmedžić, Marko AU - Krpić, D. AU - Milošević, Jovan AU - Milenović, Predrag AU - Reković, Vladimir PY - 2012 UR - https://vinar.vin.bg.ac.rs/handle/123456789/5030 AB - A measurement is presented of W-boson production in PbPb collisions carried out at a nucleon-nucleon (NN) centre-of-mass energy root S-NN of 2.76 TeV at the LHC using the CMS detector. In data corresponding to an integrated luminosity of 7.3 mu b(-1), the number of W - GT mu v(mu) decays is extracted in the region of muon pseudorapidity vertical bar eta mu vertical bar LT 2.1 and transverse momentum p(T)(mu) GT 25 GeV/c. Yields of muons found per unit of pseudorapidity correspond to (159 +/- 10(stat.) +/- 12(syst.)) x 10(-8) W and (154 +/- 10(stat.) +/- 12(syst.)) x 10(-8) W- bosons per minimum-bias PbPb collision. The dependence of W production on the centrality of PbPb collisions is consistent with a scaling of the yield by the number of incoherent NN collisions. The yield of W bosons is also studied in a sample of pp interactions at root S = 2.76 TeV corresponding to an integrated luminosity of 231 nb(-1). The individual W+ and W- yields in PbPb and pp collisions are found to agree, once the neutron and proton content in Pb nuclei is taken into account. Likewise, the difference observed in the dependence of the positive and negative muon production on pseudorapidity is consistent with next-to-leading-order perturbative QCD calculations. (c) 2012 CERN. Published by Elsevier B.V. All rights reserved. T2 - Physics Letters B T1 - Study of W boson production in PbPb and pp collisions at root s(NN)=2.76 TeV VL - 715 IS - 1-3 SP - 66 EP - 87 DO - 10.1016/j.physletb.2012.07.025 ER -
@article{ author = "Chatrchyan, S. and Adžić, Petar and Đorđević, Miloš and Ekmedžić, Marko and Krpić, D. and Milošević, Jovan and Milenović, Predrag and Reković, Vladimir", year = "2012", abstract = "A measurement is presented of W-boson production in PbPb collisions carried out at a nucleon-nucleon (NN) centre-of-mass energy root S-NN of 2.76 TeV at the LHC using the CMS detector. In data corresponding to an integrated luminosity of 7.3 mu b(-1), the number of W - GT mu v(mu) decays is extracted in the region of muon pseudorapidity vertical bar eta mu vertical bar LT 2.1 and transverse momentum p(T)(mu) GT 25 GeV/c. Yields of muons found per unit of pseudorapidity correspond to (159 +/- 10(stat.) +/- 12(syst.)) x 10(-8) W and (154 +/- 10(stat.) +/- 12(syst.)) x 10(-8) W- bosons per minimum-bias PbPb collision. The dependence of W production on the centrality of PbPb collisions is consistent with a scaling of the yield by the number of incoherent NN collisions. The yield of W bosons is also studied in a sample of pp interactions at root S = 2.76 TeV corresponding to an integrated luminosity of 231 nb(-1). The individual W+ and W- yields in PbPb and pp collisions are found to agree, once the neutron and proton content in Pb nuclei is taken into account. Likewise, the difference observed in the dependence of the positive and negative muon production on pseudorapidity is consistent with next-to-leading-order perturbative QCD calculations. (c) 2012 CERN. Published by Elsevier B.V. All rights reserved.", journal = "Physics Letters B", title = "Study of W boson production in PbPb and pp collisions at root s(NN)=2.76 TeV", volume = "715", number = "1-3", pages = "66-87", doi = "10.1016/j.physletb.2012.07.025" }
Chatrchyan, S., Adžić, P., Đorđević, M., Ekmedžić, M., Krpić, D., Milošević, J., Milenović, P.,& Reković, V.. (2012). Study of W boson production in PbPb and pp collisions at root s(NN)=2.76 TeV. in Physics Letters B, 715(1-3), 66-87. https://doi.org/10.1016/j.physletb.2012.07.025
Chatrchyan S, Adžić P, Đorđević M, Ekmedžić M, Krpić D, Milošević J, Milenović P, Reković V. Study of W boson production in PbPb and pp collisions at root s(NN)=2.76 TeV. in Physics Letters B. 2012;715(1-3):66-87. doi:10.1016/j.physletb.2012.07.025 .
Chatrchyan, S., Adžić, Petar, Đorđević, Miloš, Ekmedžić, Marko, Krpić, D., Milošević, Jovan, Milenović, Predrag, Reković, Vladimir, "Study of W boson production in PbPb and pp collisions at root s(NN)=2.76 TeV" in Physics Letters B, 715, no. 1-3 (2012):66-87, https://doi.org/10.1016/j.physletb.2012.07.025 . .