Measurement of t t ¯ production with additional jet activity, including b quark jets, in the dilepton decay channel using pp collisions at √s = 8 TeV

[Authorinst]The CMS

doi:10.1140/epjc/s10052-016-4105-x

Measurement of t t ¯ production with additional jet activity, including b quark jets, in the dilepton decay channel using pp collisions at √s = 8 TeV

[Authorinst]The CMS

European Organization for Nuclear Research
Yerevan Physics Institute
Institut für Hochenergiephysik
National Centre for Particle and High Energy Physics
University of Antwerp
Universite Paris-Saclay
Imperial College London
Vrjie Universiteit Brussel
Université Libre de Bruxelles
Ghent University
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Université de Mons
Centro Brasileiro de Pesquisas Fisicas
Rua São Francisco de Xavier
São Paulo State University
Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences
University of Sofia
Institute of High Energy Physics, Chinese Academy of Sciences
State Key Laboratory of Nuclear Physics and Technology
Universidad de Los Andes, Colombia
CSIC-Univ. Cantabria
Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, University of Split
Faculty of Science, University of Split
Ruđer Bošković Institute
University of Cyprus
Charles University
Egyptian Network of High Energy Physics
National Institute of Chemical Physics and Biophysics, Tallinn
University of Helsinki
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LUT University
Ip Paris
Université de Strasbourg
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IGFL, Université de Lyon, Université Lyon 1
Georgian Technical University
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Universität Karlsruhe/Forschungszentrum Karlsruhe
NCSR Demokritos
University of Athens
University of Ioannina
Wigner Research Centre for Physics
Institute of Nuclear Research ATOMKI
University of Debrecen
National Institute of Science Education and Research
Panjab University
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Saha Institute of Nuclear Physics
Bhabha Atomic Research Centre
Tata Institute of Fundamental Research, Mumbai
Indian Institute of Science Education and Research (IISER)
Institute for Research in Fundamental Sciences (IPM)
University College Dublin
Università degli studi di Bari Aldo Moro
University of Bologna
Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT)
Università degli Studi di Catania
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Joint Institute for Nuclear Research, Dubna
Petersburg Nuclear Physics Institute (PNPI)
Institute for Nuclear Research of the Russian Academy of Sciences
Institute for Theoretical and Experimental Physics
National Research Nuclear University MEPhI
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
Moscow State University
Kurchatov Institute
University of Belgrade
Universidad Autónoma de Madrid
University of Oviedo
Paul Scherrer Institut
ETH Zurich
University of Zurich
National Central University
National Taiwan University
Chulalongkorn University
Cukurova University
Middle East Technical University (METU)
Bogazici University
Istanbul Technical University
Academy of Science of Ukraine
Kharkov Institute of Physics and Technology
University of Bristol
CCLRC Rutherford Appleton Laboratory
Brunel University London
Baylor University
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Women and Infants Hospital of Rhode Island-Warren Alpert Medical School of Brown University
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Abstract

Jet multiplicity distributions in top quark pair (t t ¯) events are measured in pp collisions at a centre-of-mass energy of 8 TeV with the CMS detector at the LHC using a data set corresponding to an integrated luminosity of 19.7fb-1. The measurement is performed in the dilepton decay channels (e ⁺e ^-, μ⁺μ^-, and e ^±μ^∓). The absolute and normalized differential cross sections for t t ¯ production are measured as a function of the jet multiplicity in the event for different jet transverse momentum thresholds and the kinematic properties of the leading additional jets. The differential t t ¯ b and t t ¯ b b ¯ cross sections are presented for the first time as a function of the kinematic properties of the leading additional b jets. Furthermore, the fraction of events without additional jets above a threshold is measured as a function of the transverse momenta of the leading additional jets and the scalar sum of the transverse momenta of all additional jets. The data are compared and found to be consistent with predictions from several perturbative quantum chromodynamics event generators and a next-to-leading order calculation.

Original language	English
Article number	379
Journal	European Physical Journal C
Volume	76
Issue number	7
DOIs	https://doi.org/10.1140/epjc/s10052-016-4105-x
Publication status	Published - 1 Jul 2016

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@article{078d2cc17fc24bcab85337ccad69c0d3,

title = "Measurement of t t ¯ production with additional jet activity, including b quark jets, in the dilepton decay channel using pp collisions at √s = 8 TeV",

abstract = "Jet multiplicity distributions in top quark pair (t t ¯) events are measured in pp collisions at a centre-of-mass energy of 8 TeV with the CMS detector at the LHC using a data set corresponding to an integrated luminosity of 19.7fb-1. The measurement is performed in the dilepton decay channels (e +e -, μ+μ-, and e ±μ∓). The absolute and normalized differential cross sections for t t ¯ production are measured as a function of the jet multiplicity in the event for different jet transverse momentum thresholds and the kinematic properties of the leading additional jets. The differential t t ¯ b and t t ¯ b b ¯ cross sections are presented for the first time as a function of the kinematic properties of the leading additional b jets. Furthermore, the fraction of events without additional jets above a threshold is measured as a function of the transverse momenta of the leading additional jets and the scalar sum of the transverse momenta of all additional jets. The data are compared and found to be consistent with predictions from several perturbative quantum chromodynamics event generators and a next-to-leading order calculation.",

author = "\{[Authorinst]The CMS\} and V. Khachatryan and Sirunyan, \{A. M.\} and A. Tumasyan and W. Adam and E. Asilar and T. Bergauer and J. Brandstetter and E. Brondolin and M. Dragicevic and J. Er{\"o} and M. Friedl and R. Fr{\"u}hwirth and Ghete, \{V. M.\} and C. Hartl and N. H{\"o}rmann and J. Hrubec and M. Jeitler and V. Kn{\"u}nz and A. K{\"o}nig and M. Krammer and I. Kr{\"a}tschmer and D. Liko and T. Matsushita and I. Mikulec and D. Rabady and B. Rahbaran and H. Rohringer and J. Schieck and R. Sch{\"o}fbeck and J. Strauss and W. Treberer-Treberspurg and W. Waltenberger and Wulz, \{C. E.\} and V. Mossolov and N. Shumeiko and \{Suarez Gonzalez\}, J. and S. Alderweireldt and A. Zghiche and F. Beaudette and C. Charlot and O. Davignon and \{Granier de Cassagnac\}, R. and M. Nguyen and C. Ochando and P. Paganini and R. Salerno and Sauvan, \{J. B.\} and Y. Sirois and A. Zabi and \{De Wit\}, A.",

note = "Publisher Copyright: {\textcopyright} 2016, CERN for the benefit of the CMS collaboration.",

year = "2016",

month = jul,

day = "1",

doi = "10.1140/epjc/s10052-016-4105-x",

language = "English",

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journal = "European Physical Journal C",

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T1 - Measurement of t t ¯ production with additional jet activity, including b quark jets, in the dilepton decay channel using pp collisions at √s = 8 TeV

AU - [Authorinst]The CMS

AU - Khachatryan, V.

AU - Sirunyan, A. M.

AU - Tumasyan, A.

AU - Adam, W.

AU - Asilar, E.

AU - Bergauer, T.

AU - Brandstetter, J.

AU - Brondolin, E.

AU - Dragicevic, M.

AU - Erö, J.

AU - Friedl, M.

AU - Frühwirth, R.

AU - Ghete, V. M.

AU - Hartl, C.

AU - Hörmann, N.

AU - Hrubec, J.

AU - Jeitler, M.

AU - Knünz, V.

AU - König, A.

AU - Krammer, M.

AU - Krätschmer, I.

AU - Liko, D.

AU - Matsushita, T.

AU - Mikulec, I.

AU - Rabady, D.

AU - Rahbaran, B.

AU - Rohringer, H.

AU - Schieck, J.

AU - Schöfbeck, R.

AU - Strauss, J.

AU - Treberer-Treberspurg, W.

AU - Waltenberger, W.

AU - Wulz, C. E.

AU - Mossolov, V.

AU - Shumeiko, N.

AU - Suarez Gonzalez, J.

AU - Alderweireldt, S.

AU - Zghiche, A.

AU - Beaudette, F.

AU - Charlot, C.

AU - Davignon, O.

AU - Granier de Cassagnac, R.

AU - Nguyen, M.

AU - Ochando, C.

AU - Paganini, P.

AU - Salerno, R.

AU - Sauvan, J. B.

AU - Sirois, Y.

AU - Zabi, A.

AU - De Wit, A.

PY - 2016/7/1

Y1 - 2016/7/1

N2 - Jet multiplicity distributions in top quark pair (t t ¯) events are measured in pp collisions at a centre-of-mass energy of 8 TeV with the CMS detector at the LHC using a data set corresponding to an integrated luminosity of 19.7fb-1. The measurement is performed in the dilepton decay channels (e +e -, μ+μ-, and e ±μ∓). The absolute and normalized differential cross sections for t t ¯ production are measured as a function of the jet multiplicity in the event for different jet transverse momentum thresholds and the kinematic properties of the leading additional jets. The differential t t ¯ b and t t ¯ b b ¯ cross sections are presented for the first time as a function of the kinematic properties of the leading additional b jets. Furthermore, the fraction of events without additional jets above a threshold is measured as a function of the transverse momenta of the leading additional jets and the scalar sum of the transverse momenta of all additional jets. The data are compared and found to be consistent with predictions from several perturbative quantum chromodynamics event generators and a next-to-leading order calculation.

AB - Jet multiplicity distributions in top quark pair (t t ¯) events are measured in pp collisions at a centre-of-mass energy of 8 TeV with the CMS detector at the LHC using a data set corresponding to an integrated luminosity of 19.7fb-1. The measurement is performed in the dilepton decay channels (e +e -, μ+μ-, and e ±μ∓). The absolute and normalized differential cross sections for t t ¯ production are measured as a function of the jet multiplicity in the event for different jet transverse momentum thresholds and the kinematic properties of the leading additional jets. The differential t t ¯ b and t t ¯ b b ¯ cross sections are presented for the first time as a function of the kinematic properties of the leading additional b jets. Furthermore, the fraction of events without additional jets above a threshold is measured as a function of the transverse momenta of the leading additional jets and the scalar sum of the transverse momenta of all additional jets. The data are compared and found to be consistent with predictions from several perturbative quantum chromodynamics event generators and a next-to-leading order calculation.

U2 - 10.1140/epjc/s10052-016-4105-x

DO - 10.1140/epjc/s10052-016-4105-x

M3 - Article

AN - SCOPUS:84978198716

SN - 1434-6044

VL - 76

JO - European Physical Journal C

JF - European Physical Journal C

IS - 7

M1 - 379

ER -

Measurement of t t ¯ production with additional jet activity, including b quark jets, in the dilepton decay channel using pp collisions at √s = 8 TeV

Abstract

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