Production of W and Z bosons in heavy-ion collisions with CMS

被引：0

作者：

Florent, Alice ^{[1
]}

机构：

[1] Ecole Polytech, LLR, F-259162 Palaiseau, France

来源：

NUCLEAR PHYSICS A | 2014年 / 932卷

基金：

欧洲研究理事会;

关键词：

Electroweak bosons; W; Z; PbPb collisions; pp collisions; Electron; Muon; Nuclear modification factor; Rapidity; Transverse momentum; Centrality; Muon pseudorapidity; W charge asymmetry;

D O I：

10.1016/j.nuclphysa.2014.10.025

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Weak bosons do not participate in the strong interaction, and thus constitute clean probes of the initial state of nucleus-nucleus collisions. The comparison of their production cross sections in pp and in nuclear collisions provides constraints on the nuclear parton distribution functions. Despite the low production cross section of weak bosons, compared to other nuclear processes, the relatively clean signal of their leptonic decay channels allows their detection and reconstruction. A first analysis of PbPb data has confirmed the medium-blind characteristic of the electroweak bosons. This paper reports measurements of Z and W bosons, produced in PbPb and pp collisions at nucleon-nucleon centre of mass energy root S-NN = 2.76 TeV with the CMS detector. The Z boson yield and the nuclear modification factor (R-AA) corresponding to an integrated luminosity of 150 mu b(-1) are presented, as a function of the centrality, of the Z rapidity and P-T, both in the muonic and electronic channels. Event centrality and muon pseudorapidity dependencies of the W production yields are presented separately for W+ and W-. (c) 2014 CERN. Published by Elsevier B.V. All rights reserved.

引用

页码：459 / 465

页数：7

共 4 条

[1]

[Anonymous], CMSPASHIN13004

[2] Study of W boson production in PbPb and pp collisions at √sNN=2.76 TeV [J].

Chatrchyan, S. ;

Khachatryan, V. ;

Sirunyan, A. M. ;

Tumasyan, A. ;

Adam, W. ;

Bergauer, T. ;

Dragicevic, M. ;

Eroe, J. ;

Fabjan, C. ;

Friedl, M. ;

Fruehwirth, R. ;

Ghete, V. M. ;

Hammer, J. ;

Hoermann, N. ;

Hrubec, J. ;

Jeitler, M. ;

Kiesenhofer, W. ;

Knuenz, V. ;

Krammer, M. ;

Liko, D. ;

Mikulec, I. ;

Pernicka, M. ;

Rahbaran, B. ;

Rohringer, C. ;

Rohringer, H. ;

Schoefbeck, R. ;

Strauss, J. ;

Taurok, A. ;

Wagner, P. ;

Waltenberger, W. ;

Walzel, G. ;

Widl, E. ;

Wulz, C. -E. ;

Mossolov, V. ;

Shumeiko, N. ;

Gonzalez, J. Suarez ;

Bansal, S. ;

Cornelis, T. ;

De Wolf, E. A. ;

Janssen, X. ;

Luyckx, S. ;

Maes, T. ;

Mucibello, L. ;

Ochesanu, S. ;

Roland, B. ;

Rougny, R. ;

Selvaggi, M. ;

Staykova, Z. ;

Van Haevermaet, H. ;

Van Mechelen, P. .

PHYSICS LETTERS B, 2012, 715 (1-3) :66-87

[3] The CMS experiment at the CERN LHC [J].

Chatrchyan, S. ;

Hmayakyan, G. ;

Khachatryan, V. ;

Sirunyan, A. M. ;

Adam, W. ;

Bauer, T. ;

Bergauer, T. ;

Bergauer, H. ;

Dragicevic, M. ;

Eroe, J. ;

Friedl, M. ;

Fruehwirth, R. ;

Ghete, V. M. ;

Glaser, P. ;

Hartl, C. ;

Hoermann, N. ;

Hrubec, J. ;

Haensel, S. ;

Jeitler, M. ;

Kastner, K. ;

Krammer, M. ;

de Abril, I. Magrans ;

Markytan, M. ;

Mikulec, I. ;

Neuherz, B. ;

Noebauer, T. ;

Oberegger, M. ;

Padrta, M. ;

Pernicka, M. ;

Porth, P. ;

Rohringer, H. ;

Schmid, S. ;

Schreiner, T. ;

Stark, R. ;

Steininger, H. ;

Strauss, J. ;

Taurok, A. ;

Uhl, D. ;

Waltenberger, W. ;

Walzel, G. ;

Widl, E. ;

Wulz, C. -E. ;

Petrov, V. ;

Prosolovich, V. ;

Chekhovsky, V. ;

Dvornikov, O. ;

Emeliantchik, I. ;

Litomin, A. ;

Makarenko, V. ;

Marfin, I. .

JOURNAL OF INSTRUMENTATION, 2008, 3

[4] Vector bosons in heavy-ion collisions at the LHC [J].

del Valle, Zaida Conesa .

EUROPEAN PHYSICAL JOURNAL C, 2009, 61 (04) :729-733

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