Study of W boson production in PbPb and pp collisions at sNN=2.76 TeV

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/108107

Title:	Study of W boson production in PbPb and pp collisions at sNN=2.76 TeV
Authors:	張元翰;Chatrchyan, S.;Wagner, P.;Waltenberger, W.;Luyckx, S.;Roland, B.;Blyweert, S.;Van Onsem, G.P.;Vanelderen, L.;Giammanco, A.;Hammad, G.H.;Sznajder, A.;Mercadante, P.G.;Petkov, P.;Asawatangtrakuldee, C.;Zou, W.;Fedi, G.;Broutin, C.;Schael, S.;Heidemann, C.;Sauerland, P.;Schleper, P.;Seidel, M.;Beni, N.;Molnar, J.;Karancsi, J.;Nishu, N.;Dutta, S.;Kumar, V.;Aziz, T.;Nuzzo, S.;Fasanella, D.;Frosali, S.;Lariccia, P.;Lucaroni, A.;Cavallari, F.;Meridiani, P.;Argiro, S.;Kim, D.H.;Park, H.;Kim, T.J.;Choi, Y.K.;Asghar, M.I.;Szleper, M.;Ferreira Parracho, P.G.;Shmatov, S.;Uvarov, L.;Savrin, V.;Dremin, I.;Dupont-Sagorin, N.;Mozer, M.U.;Rodrigues Antunes, J.;Sekmen, S.;Simon, M.;Sphicas, P.;Deiters, K.;Renker, D.;Tauscher, L.;Snoek, H.;Yu, S.S.;Chao, Y.;Wang, M.;Kaya, O.;Heath, G.P.;Cockerill, D.J.A.;Chadwick, M.;Sperka, D.;Heintz, U.;Conway, R.;Dolen, J.;Clare, R.;Giordano, F.;Cerati, G.B.;Holzner, A.;Sudano, E.;Drell, B.R.;Edelmaier, C.J.;Albrow, M.;Bhat, P.C.;Uplegger, L.;Kim, B.;Korytov, A.;Adams, T.;Bochenek, J.;Hu, G.;Gronberg, J.;Dutta, V.;Singovsky, A.;Lazo-Flores, J.;Snow, G.R.;Wood, D.;Kolb, J.;Luo, W.;Hill, C.;Lopez, A.;De Mattia, M.;Guragain, S.;Ecklund, K.M.;Toback, D.;Lin, C.;Belknap, D.
Contributors:	理學院物理學系
Keywords:	CMS;Exact sciences and technology;Heavy-ions;Nuclear physics;Physics;The physics of elementary particles and fields;W bosons
Date:	2012-08-29
Issue Date:	2026-04-23 14:36:02 (UTC+8)
Publisher:	Kidlington: Elsevier B.V
Abstract:	摘要： A measurement is presented of W-boson production in PbPb collisions carried out at a nucleon–nucleon (NN) centre-of-mass energy sNN of 2.76 TeV at the LHC using the CMS detector. In data corresponding to an integrated luminosity of 7.3 μb−1, the number of W→μνμ decays is extracted in the region of muon pseudorapidity \|ημ\|<2.1 and transverse momentum pTμ>25 GeV/c. Yields of muons found per unit of pseudorapidity correspond to (159±10(stat.)±12(syst.))×10−8W+ and (154±10(stat.)±12(syst.))×10−8W− 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 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. 出版者： Kidlington: Elsevier B.V 出版日期： 2012-08-29 出處： Physics letters. B, 2012-08, Vol.715 (1-3), p.66-87 資源來源： Elsevier ScienceDirect Journals 版權： 2012 CERN 版權： 2015 INIST-CNRS 識別號： ISSN: 0370-2693 識別號： EISSN: 1873-2445 識別號： DOI: 10.1016/j.physletb.2012.07.025 識別號： CODEN: PYLBAJ
Appears in Collections:	[Department of Physics] journal & Dissertation

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