Charged-particle multiplicity measurement in proton–proton collisions at \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$\sqrt{s}=7$\end{document} TeV with ALICE at LHC

被引:0
作者
K. Aamodt
N. Abel
U. Abeysekara
A. Abrahantes Quintana
A. Abramyan
D. Adamová
M. M. Aggarwal
G. Aglieri Rinella
A. G. Agocs
S. Aguilar Salazar
Z. Ahammed
A. Ahmad
N. Ahmad
S. U. Ahn
R. Akimoto
A. Akindinov
D. Aleksandrov
B. Alessandro
R. Alfaro Molina
A. Alici
E. Almaráz Aviña
J. Alme
T. Alt
V. Altini
S. Altinpinar
C. Andrei
A. Andronic
G. Anelli
V. Angelov
C. Anson
T. Antičić
F. Antinori
S. Antinori
K. Antipin
D. Antończyk
P. Antonioli
A. Anzo
L. Aphecetche
H. Appelshäuser
S. Arcelli
R. Arceo
A. Arend
N. Armesto
R. Arnaldi
T. Aronsson
I. C. Arsene
A. Asryan
A. Augustinus
R. Averbeck
T. C. Awes
机构
[1] Dipartimento di Scienze e Tecnologie Avanzate dell’Università del Piemonte Orientale and Gruppo Collegato INFN,Physics Department
[2] Department of Physics Aligarh Muslim University,Department of Physics and Technology
[3] National Institute for Nuclear and High Energy Physics (NIKHEF),Faculty of Engineering
[4] University of Athens,Lawrence Berkeley National Laboratory
[5] Dipartimento Interateneo di Fisica ‘M. Merlin’ and Sezione INFN,School of Physics and Astronomy
[6] Sezione INFN,Faculty of Mathematics, Physics and Informatics
[7] China Institute of Atomic Energy,KFKI Research Institute for Particle and Nuclear Physics
[8] University of Bergen,Physics Department
[9] Bergen University College,Physics Department
[10] Berkeley,Laboratoire de Physique Corpusculaire (LPC)
[11] Institute of Physics,Department of Physics
[12] University of Birmingham,Niels Bohr Institute
[13] Dipartimento di Fisica dell’Università and Sezione INFN,The Henryk Niewodniczanski Institute of Nuclear Physics
[14] Sezione INFN,Research Division and ExtreMe Matter Institute EMMI
[15] Comenius University,Institut für Kernphysik
[16] Institute of Space Sciences (ISS),Frankfurt Institute for Advanced Studies
[17] National Institute for Physics and Nuclear Engineering,Institut für Kernphysik
[18] Hungarian Academy of Sciences,Laboratori Nazionali di Frascati
[19] Dipartimento di Fisica dell’Università and Sezione INFN,Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier, CNRS
[20] Sezione INFN,IN2P3
[21] Universidade Estadual de Campinas (UNICAMP),Kirchhoff
[22] University of Cape Town,Institut für Physik
[23] iThemba Laboratories,Physikalisches Institut
[24] Dipartimento di Fisica e Astronomia dell’Università and Sezione INFN,Physics Department
[25] Sezione INFN,Physics Department
[26] Panjab University,Faculty of Science
[27] Clermont Université,Institute of Experimental Physics
[28] Université Blaise Pascal,Laboratori Nazionali di Legnaro
[29] CNRS–IN2P3,Sección Física, Departamento de Ciencias
[30] Ohio State University,Division of Experimental High Energy Physics
[31] University of Copenhagen,Institut de Physique Nucléaire de Lyon
[32] Polish Academy of Sciences,Instituto de Ciencias Nucleares
[33] Universidad Autónoma de Sinaloa,Instituto de Física
[34] GSI Helmholtzzentrum für Schwerionenforschung,Institut für Kernphysik
[35] Technische Universität Darmstadt,SUBATECH, Ecole des Mines de Nantes
[36] Wayne State University,Physics Department
[37] Joint Institute for Nuclear Research (JINR),Institut de Physique Nucléaire d’Orsay (IPNO)
[38] Johann Wolfgang Goethe-Universität Frankfurt,Department of Physics
[39] Johann Wolfgang Goethe-Universität Frankfurt,Faculty of Nuclear Sciences and Physical Engineering
[40] INFN,Institute of Physics
[41] Gangneung-Wonju National University,Nuclear Physics Institute
[42] Petersburg Nuclear Physics Institute,Commissariat à l’Energie Atomique
[43] European Organization for Nuclear Research (CERN),Departamento de Física de Partículas and IGFAE
[44] Institut Polytechnique de Grenoble,Department of Physics
[45] Centro de Aplicaciones Tecnológicas y Desarrollo Nuclear (CEADEN),V. Fock Institute for Physics
[46] Ruprecht-Karls-Universität Heidelberg,Institut Pluridisciplinaire Hubert Curien (IPHC)
[47] Ruprecht-Karls-Universität Heidelberg,Institute for Subatomic Physics
[48] Hiroshima University,Zentrum für Technologietransfer und Telekommunikation (ZTT)
[49] University of Houston,undefined
[50] University of Rajasthan,undefined
来源
The European Physical Journal C | 2010年 / 68卷 / 3-4期
关键词
Systematic Uncertainty; Multiplicity Distribution; Silicon Pixel Detector; Pseudorapidity Density; PYTHIA Tune;
D O I
10.1140/epjc/s10052-010-1350-2
中图分类号
学科分类号
摘要
The pseudorapidity density and multiplicity distribution of charged particles produced in proton–proton collisions at the LHC, at a centre-of-mass energy \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$\sqrt{s}=7$\end{document} TeV, were measured in the central pseudorapidity region |η|<1. Comparisons are made with previous measurements at \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$\sqrt{s}=0.9$\end{document} TeV and 2.36 TeV. At \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$\sqrt{s}=7$\end{document} TeV, for events with at least one charged particle in |η|<1, we obtain \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$\mathrm{d}N_{\mathrm{ch}}/\mathrm{d}\eta=6.01\pm0.01(\mathrm {stat.})^{+0.20}_{-0.12}(\mathrm{syst.})$\end{document}. This corresponds to an increase of \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$57.6\%\pm0.4\%(\mathrm{stat.})^{+3.6}_{-1.8}\%(\mathrm{syst.})$\end{document} relative to collisions at 0.9 TeV, significantly higher than calculations from commonly used models. The multiplicity distribution at 7 TeV is described fairly well by the negative binomial distribution.
引用
收藏
页码:345 / 354
页数:9
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