Measurement of the mass of the top quark in decays with a J/ψ meson in pp collisions at 8 TeV

被引：0
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作者：
V. Khachatryan
A. M. Sirunyan
A. Tumasyan
W. Adam
E. Asilar
T. Bergauer
J. Brandstetter
E. Brondolin
M. Dragicevic
J. Erö
M. Flechl
M. Friedl
R. Frühwirth
V. M. Ghete
C. Hartl
N. Hörmann
J. Hrubec
M. Jeitler
A. König
I. Krätschmer
D. Liko
T. Matsushita
I. Mikulec
D. Rabady
N. Rad
B. Rahbaran
H. Rohringer
J. Schieck
J. Strauss
W. Treberer-Treberspurg
W. Waltenberger
C.-E. Wulz
V. Mossolov
N. Shumeiko
J. Suarez Gonzalez
S. Alderweireldt
E. A. De Wolf
X. Janssen
J. Lauwers
M. Van De Klundert
H. Van Haevermaet
P. Van Mechelen
N. Van Remortel
A. Van Spilbeeck
S. Abu Zeid
F. Blekman
J. D’Hondt
N. Daci
I. De Bruyn
K. Deroover
机构：
[1] Yerevan Physics Institute,State Key Laboratory of Nuclear Physics and Technology
[2] Institut für Hochenergiephysik der OeAW,Department of Physics
[3] National Centre for Particle and High Energy Physics,MTA
[4] Universiteit Antwerpen,ELTE Lendület CMS Particle and Nuclear Physics Group
[5] Vrije Universiteit Brussel,National Centre for Particle Physics
[6] Université Libre de Bruxelles,National Centre for Physics
[7] Ghent University,Institute of Experimental Physics, Faculty of Physics
[8] Université Catholique de Louvain,Skobeltsyn Institute of Nuclear Physics
[9] Université de Mons,Institute for Particle Physics
[10] Centro Brasileiro de Pesquisas Fisicas,Plasma Physics Research Center, Science and Research Branch
[11] Universidade do Estado do Rio de Janeiro,Faculty of Physics
[12] Universidade Estadual Paulista,School of Physics and Astronomy
[13] Universidade Federal do ABC,Facoltà Ingegneria
[14] Institute for Nuclear Research and Nuclear Energy,undefined
[15] University of Sofia,undefined
[16] Beihang University,undefined
[17] Institute of High Energy Physics,undefined
[18] Peking University,undefined
[19] Universidad de Los Andes,undefined
[20] University of Split,undefined
[21] Faculty of Electrical Engineering,undefined
[22] Mechanical Engineering and Naval Architecture,undefined
[23] University of Split,undefined
[24] Faculty of Science,undefined
[25] Institute Rudjer Boskovic,undefined
[26] University of Cyprus,undefined
[27] Charles University,undefined
[28] Universidad San Francisco de Quito,undefined
[29] Academy of Scientific Research and Technology of the Arab Republic of Egypt,undefined
[30] Egyptian Network of High Energy Physics,undefined
[31] National Institute of Chemical Physics and Biophysics,undefined
[32] University of Helsinki,undefined
[33] Helsinki Institute of Physics,undefined
[34] Lappeenranta University of Technology,undefined
[35] IRFU,undefined
[36] CEA,undefined
[37] Université Paris-Saclay,undefined
[38] Laboratoire Leprince-Ringuet,undefined
[39] Ecole Polytechnique,undefined
[40] IN2P3-CNRS,undefined
[41] Institut Pluridisciplinaire Hubert Curien,undefined
[42] Université de Strasbourg,undefined
[43] Université de Haute Alsace Mulhouse,undefined
[44] CNRS/IN2P3,undefined
[45] Centre de Calcul de l’Institut National de Physique Nucleaire et de Physique des Particules,undefined
[46] CNRS/IN2P3,undefined
[47] Université de Lyon,undefined
[48] Université Claude Bernard Lyon 1,undefined
[49] CNRS-IN2P3,undefined
[50] Institut de Physique Nucléaire de Lyon,undefined
来源：
Journal of High Energy Physics | / 2016卷
关键词：
Hadron-Hadron scattering (experiments); Top physics;
D O I：
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中图分类号：
学科分类号：
摘要：
A first measurement of the top quark mass in the decay channel t → (W → ℓν) (b → J/ψ + X → μ+μ− + X) is presented. The analysis uses events selected from the proton-proton collisions recorded by the CMS detector at the LHC at a center-of-mass energy of 8 TeV. The data correspond to an integrated luminosity of 19.7 fb−1, with 666 tt¯\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ \mathrm{t}\overline{\mathrm{t}} $$\end{document} and single top quark candidate events containing a reconstructed J/ψ candidate decaying into an oppositely-charged muon pair. The mass of the (J/ψ + ℓ) system, where ℓ is an electron or a muon from W boson decay, is used to extract a top quark mass of 173.5 ± 3.0 (stat) ± 0.9 (syst) GeV. [graphic not available: see fulltext]
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