Measurement of the Z/γ* + b-jet cross section 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} = 7 $\end{document} TeV

被引：0
作者：
S. Chatrchyan
V. Khachatryan
A. M. Sirunyan
A. Tumasyan
W. Adam
T. Bergauer
M. Dragicevic
J. Erö
C. Fabjan
M. Friedl
R. Frühwirth
V. M. Ghete
J. Hammer
M. Hoch
N. Hörmann
J. Hrubec
M. Jeitler
W. Kiesenhofer
M. Krammer
D. Liko
I. Mikulec
M. Pernicka
B. Rahbaran
C. Rohringer
H. Rohringer
R. Schöfbeck
J. Strauss
A. Taurok
F. Teischinger
P. Wagner
W. Waltenberger
G. Walzel
E. Widl
C.-E. Wulz
V. Mossolov
N. Shumeiko
J. Suarez Gonzalez
S. Bansal
L. Benucci
T. Cornelis
E. A. De Wolf
X. Janssen
S. Luyckx
T. Maes
L. Mucibello
S. Ochesanu
B. Roland
R. Rougny
M. Selvaggi
H. Van Haevermaet
机构：
[1] Yerevan Physics Institute,State Key Lab. of Nucl. Phys. and Tech.
[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 Physics
[5] Vrije Universiteit Brussel,Institute of Experimental Physics, Faculty of Physics
[6] Université Libre de Bruxelles,Physics Department
[7] Ghent University,Plasma Physics Research Center, Science and Research Branch
[8] Université Catholique de Louvain,School of Physics and Astronomy
[9] Université de Mons,undefined
[10] Centro Brasileiro de Pesquisas Fisicas,undefined
[11] Universidade do Estado do Rio de Janeiro,undefined
[12] Instituto de Fisica Teorica,undefined
[13] Universidade Estadual Paulista,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] Laboratoire d’Annecy-le-Vieux de Physique des Particules,undefined
[31] IN2P3-CNRS,undefined
[32] DSM/IRFU,undefined
[33] CEA/Saclay,undefined
[34] Laboratoire Leprince-Ringuet,undefined
[35] Ecole Polytechnique,undefined
[36] IN2P3-CNRS,undefined
[37] Institut Pluridisciplinaire Hubert Curien,undefined
[38] Université de Strasbourg,undefined
[39] Université de Haute Alsace Mulhouse,undefined
[40] CNRS/IN2P3,undefined
[41] Centre de Calcul de l’Institut National de Physique Nucleaire et de Physique des Particules (IN2P3),undefined
[42] Université de Lyon,undefined
[43] Université Claude Bernard Lyon 1,undefined
[44] CNRS-IN2P3,undefined
[45] Institut de Physique Nucléaire de Lyon,undefined
[46] Tbilisi State University,undefined
[47] RWTH Aachen University,undefined
[48] I. Physikalisches Institut,undefined
[49] RWTH Aachen University,undefined
[50] III. Physikalisches Institut A,undefined
来源：
Journal of High Energy Physics | / 2012卷 / 6期
关键词：
Hadron-Hadron Scattering;
D O I：
10.1007/JHEP06(2012)126
中图分类号：
学科分类号：
摘要：
The production of b jets in association with a Z/γ* boson is studied using proton-proton collisions delivered by the LHC at a centre-of-mass energy of 7 TeV and recorded by the CMS detector. The inclusive cross section for Z/γ* + b-jet production is measured in a sample corresponding to an integrated luminosity of 2.2 fb−1. The Z/γ* + b-jet cross section with Z/γ* → ℓℓ (where ℓℓ = ee or μμ) for events with the invariant mass 60 < Mℓℓ < 120 GeV, at least one b jet at the hadron level with pT > 25 GeV and |η| < 2.1, and a separation between the leptons and the jets of ΔR > 0.5 is found to be \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$ {5}.{84}\pm 0.0{8}\left( {{\text{stat}}.} \right)\pm 0.{72}\left( {{\text{syst}}.} \right)_{ - 0.55}^{ + 0.25} $\end{document} (theory) pb. The kinematic properties of the events are also studied and found to be in agreement with the predictions made by the MadGraph event generator with the parton shower and the hadronisation performed by pythia.
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