Measurement of the inclusive 3-jet production differential cross section in proton–proton collisions at 7 TeV and determination of the strong coupling constant in the TeV range

被引:0
作者
V. Khachatryan
A. M. Sirunyan
A. Tumasyan
W. Adam
T. Bergauer
M. Dragicevic
J. Erö
C. Fabjan
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
A. Taurok
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
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
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
关键词
CMS; Physics; QCD; Jets; 3-jet mass; PDF ; Strong coupling constant; Alpha-S;
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摘要
This paper presents a measurement of the inclusive 3-jet production differential cross section at a proton–proton centre-of-mass energy of 7 TeV using data corresponding to an integrated luminosity of 5fb-1\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\,\mathrm{fb}^{-1}$$\end{document}collected with the CMS detector. The analysis is based on the three jets with the highest transverse momenta. The cross section is measured as a function of the invariant mass of the three jets in a range of 445–3270 GeV and in two bins of the maximum rapidity of the jets up to a value of 2. A comparison between the measurement and the prediction from perturbative QCD at next-to-leading order is performed. Within uncertainties, data and theory are in agreement. The sensitivity of the observable to the strong coupling constant αS\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\alpha _\mathrm {S}$$\end{document} is studied. A fit to all data points with 3-jet masses larger than 664 GeV gives a value of the strong coupling constant of αS(MZ)=0.1171±0.0013(exp)-0.0047+0.0073(theo)\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\alpha _S(M_\mathrm{Z}) = 0.1171 \pm 0.0013\,\text {(exp)} \,^{+0.0073}_{-0.0047}\,\text {(theo)} $$\end{document}.
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