Nuclear effects on the transverse momentum spectra of charged particles in pPb collisions at sNN=5.02\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\sqrt{s_{_\mathrm {NN}}} =5.02$$\end{document}TeV\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\,\text {TeV}$$\end{document}

被引:0
作者
V. Khachatryan
A. M. Sirunyan
A. Tumasyan
W. Adam
T. Bergauer
M. Dragicevic
J. Erö
M. Friedl
R. Frühwirth
V. M. Ghete
C. Hartl
N. Hörmann
J. Hrubec
M. Jeitler
W. Kiesenhofer
V. Knünz
M. Krammer
I. Krätschmer
D. Liko
I. Mikulec
D. Rabady
B. Rahbaran
H. Rohringer
R. Schöfbeck
J. Strauss
W. Treberer-Treberspurg
W. Waltenberger
C.-E. Wulz
V. Mossolov
N. Shumeiko
J. Suarez Gonzalez
S. Alderweireldt
M. Bansal
S. Bansal
T. Cornelis
E. A. De Wolf
X. Janssen
A. Knutsson
J. Lauwers
S. Luyckx
S. Ochesanu
R. Rougny
M. Van De Klundert
H. Van Haevermaet
P. Van Mechelen
N. Van Remortel
A. Van Spilbeeck
F. Blekman
S. Blyweert
J. D’Hondt
机构
[1] Yerevan Physics Institute,State Key Laboratory of Nuclear Physics and Technology
[2] Institut für Hochenergiephysik der OeAW,Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture
[3] National Centre for Particle and High Energy Physics,Faculty of Science
[4] Universiteit Antwerpen,Academy of Scientific Research and Technology of the Arab Republic of Egypt
[5] Vrije Universiteit Brussel,Department of Physics
[6] Université Libre de Bruxelles,Laboratoire Leprince
[7] Ghent University,Ringuet
[8] Université Catholique de Louvain,Institut Pluridisciplinaire Hubert Curien, Université de Strasbourg
[9] Université de Mons,Institut de Physique Nucléaire de Lyon
[10] Centro Brasileiro de Pesquisas Fisicas,Institute of High Energy Physics and Informatization
[11] Universidade do Estado do Rio de Janeiro,I. Physikalisches Institut
[12] Universidade Estadual Paulista,III. Physikalisches Institut A
[13]  Universidade Federal do ABC,III. Physikalisches Institut B
[14] Institute for Nuclear Research and Nuclear Energy,Institute of Nuclear and Particle Physics (INPP)
[15] University of Sofia,INFN Sezione di Milano
[16] Institute of High Energy Physics,Bicocca
[17] Peking University,INFN Sezione di Napoli
[18] Universidad de Los Andes,INFN Sezione di Padova
[19] University of Split,INFN Sezione di Pavia
[20] University of Split,INFN Sezione di Perugia
[21] Institute Rudjer Boskovic,INFN Sezione di Pisa
[22] University of Cyprus,INFN Sezione di Roma
[23] Charles University,INFN Sezione di Torino
[24] Egyptian Network of High Energy Physics,National Centre for Particle Physics
[25] National Institute of Chemical Physics and Biophysics,National Centre for Physics
[26] University of Helsinki,Institute of Experimental Physics, Faculty of Physics
[27] Helsinki Institute of Physics,Skobeltsyn Institute of Nuclear Physics
[28] Lappeenranta University of Technology,State Research Center of Russian Federation
[29] DSM/IRFU,Faculty of Physics and Vinca Institute of Nuclear Sciences
[30] CEA/Saclay,Instituto de Física de Cantabria (IFCA)
[31] Ecole Polytechnique,Department of Physics, Faculty of Science
[32] IN2P3-CNRS,Physics Department
[33] Université de Haute Alsace Mulhouse,National Scientific Center
[34] CNRS/IN2P3,undefined
[35] Centre de Calcul de l’Institut National de Physique Nucleaire et de Physique des Particules,undefined
[36] CNRS/IN2P3,undefined
[37] Université de Lyon,undefined
[38] Université Claude Bernard Lyon 1,undefined
[39] CNRS-IN2P3,undefined
[40] Tbilisi State University,undefined
[41] RWTH Aachen University,undefined
[42] RWTH Aachen University,undefined
[43] RWTH Aachen University,undefined
[44] Deutsches Elektronen-Synchrotron,undefined
[45] University of Hamburg,undefined
[46] Institut für Experimentelle Kernphysik,undefined
[47] NCSR Demokritos,undefined
[48] University of Athens,undefined
[49] University of Ioánnina,undefined
[50] Wigner Research Centre for Physics,undefined
来源
The European Physical Journal C | 2015年 / 75卷 / 5期
关键词
CMS; Physics; Relativistic heavy-ion collisions;
D O I
10.1140/epjc/s10052-015-3435-4
中图分类号
学科分类号
摘要
Transverse momentum spectra of charged particles are measured by the CMS experiment at the CERN LHC in pPb collisions at sNN=5.02\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\sqrt{s_{_\mathrm {NN}}} =5.02$$\end{document}TeV\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\,\text {TeV}$$\end{document}, in the range 0.4<pT<120\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$0.4 < p_{\mathrm {T}} < 120$$\end{document}GeV/c\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\,\text {GeV/}c}$$\end{document} and pseudorapidity |ηCM|<1.8\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$|\eta _\textsc {cm} | < 1.8$$\end{document} in the proton–nucleon center-of-mass frame. For pT<10\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$p_{\mathrm {T}} <10$$\end{document}GeV/c\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\,\text {GeV/}c}$$\end{document}, the charged-particle production is asymmetric about ηCM=0\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\eta _\textsc {cm} = 0$$\end{document}, with smaller yield observed in the direction of the proton beam, qualitatively consistent with expectations from shadowing in nuclear parton distribution functions (nPDF). A pp reference spectrum at s=5.02\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\sqrt{s}=5.02$$\end{document}TeV\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\,\text {TeV}$$\end{document} is obtained by interpolation from previous measurements at higher and lower center-of-mass energies. The pT\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$p_{\mathrm {T}}$$\end{document} distribution measured in pPb collisions shows an enhancement of charged particles with pT>20\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$p_{\mathrm {T}} >20$$\end{document}GeV/c\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\,\text {GeV/}c}$$\end{document} compared to expectations from the pp reference. The enhancement is larger than predicted by perturbative quantum chromodynamics calculations that include antishadowing modifications of nPDFs.
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