Measurement of the t-channel single-top-quark production cross section and of the |Vtb| CKM matrix element in pp 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} $\end{document} = 8 TeV

被引：0
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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
B. Roland
R. Rougny
M. Van De Klundert
H. Van Haevermaet
P. Van Mechelen
N. Van Remortel
A. Van Spilbeeck
F. Blekman
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,Institute of High Energy Physics and Informatization
[4] Universiteit Antwerpen,National Centre for Particle Physics
[5] Vrije Universiteit Brussel,Institute of Experimental Physics, Faculty of Physics
[6] Université Libre de Bruxelles,Skobeltsyn Institute of Nuclear Physics
[7] Ghent University,Instituto de Física de Cantabria (IFCA)
[8] Université Catholique de Louvain,Plasma Physics Research Center, Science and Research Branch
[9] Université de Mons,Faculty of Physics
[10] Centro Brasileiro de Pesquisas Fisicas,Facoltà Ingegneria
[11] Universidade do Estado do Rio de Janeiro,School of Physics and Astronomy
[12] Universidade Estadual Paulista,undefined
[13] Universidade Federal do ABC,undefined
[14] Institute for Nuclear Research and Nuclear Energy,undefined
[15] University of Sofia,undefined
[16] Institute of High Energy Physics,undefined
[17] Peking University,undefined
[18] Universidad de Los Andes,undefined
[19] Technical University of Split,undefined
[20] University of Split,undefined
[21] Institute Rudjer Boskovic,undefined
[22] University of Cyprus,undefined
[23] Charles University,undefined
[24] Academy of Scientific Research and Technology of the Arab Republic of Egypt,undefined
[25] Egyptian Network of High Energy Physics,undefined
[26] National Institute of Chemical Physics and Biophysics,undefined
[27] University of Helsinki,undefined
[28] Helsinki Institute of Physics,undefined
[29] Lappeenranta University of Technology,undefined
[30] DSM/IRFU,undefined
[31] CEA/Saclay,undefined
[32] Laboratoire Leprince-Ringuet,undefined
[33] Ecole Polytechnique,undefined
[34] IN2P3-CNRS,undefined
[35] Institut Pluridisciplinaire Hubert Curien,undefined
[36] Université de Strasbourg,undefined
[37] Université de Haute Alsace Mulhouse,undefined
[38] CNRS/IN2P3,undefined
[39] Centre de Calcul de l’Institut National de Physique Nucleaire et de Physique des Particules,undefined
[40] CNRS/IN2P3,undefined
[41] Université de Lyon,undefined
[42] Université Claude Bernard Lyon 1,undefined
[43] CNRS-IN2P3,undefined
[44] Institut de Physique Nucléaire de Lyon,undefined
[45] Tbilisi State University,undefined
[46] RWTH Aachen University,undefined
[47] I. Physikalisches Institut,undefined
[48] RWTH Aachen University,undefined
[49] III. Physikalisches Institut A,undefined
[50] RWTH Aachen University,undefined
来源：
Journal of High Energy Physics | / 2014卷 / 6期
关键词：
Hadron-Hadron Scattering; Top physics;
D O I：
10.1007/JHEP06(2014)090
中图分类号：
学科分类号：
摘要：
Measurements are presented of the t-channel single-top-quark production cross section 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} $\end{document} = 8 TeV. The results are based on a data sample corresponding to an integrated luminosity of 19.7 fb−1 recorded with the CMS detector at the LHC. The cross section is measured inclusively, as well as separately for top (t) and antitop \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$ \left(\overline{\mathrm{t}}\right) $\end{document}, in final states with a muon or an electron. The measured inclusive t-channel cross section is σt-ch. = 83.6 ± 2.3 (stat.) ± 7.4 (syst.) pb. The single t and \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$ \overline{\mathrm{t}} $\end{document} cross sections are measured to be σt-ch.(t) = 53.8 ± 1.5 (stat.) ± 4.4 (syst.) pb and σt-ch.\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$ \left(\overline{t}\right) $\end{document} = 27.6 ± 1.3 (stat.) ± 3.7 (syst.) pb, respectively. The measured ratio of cross sections is Rt-ch. = σt-ch.(t)/σt-ch.\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$ \left(\overline{\mathrm{t}}\right) $\end{document} = 1.95 ± 0.10 (stat.) ± 0.19 (syst.), in agreement with the standard model prediction. The modulus of the Cabibbo-Kobayashi-Maskawa matrix element Vtb is extracted and, in combination with a previous CMS result at \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$ \sqrt{s} $\end{document} = 7 TeV, a value |Vtb| = 0.998 ± 0.038 (exp.) ± 0.016 (theo.) is obtained. [graphic not available: see fulltext]
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