Measurement of $$\mathrm{ t \bar{t} } $$ production with additional jet activity, including b quark jets, in the dilepton decay channel using pp collisions at $$\sqrt{s} =$$ 8 TeV
Abstract
Jet multiplicity distributions in top quark pair (ttbar) events are measured in pp collisions at a centreofmass energy of 8 TeV with the CMS detector at the LHC using a data set corresponding to an integrated luminosity of 19.7 fb^{1}. The measurement is performed in the dilepton decay channels (e^{+}e^{},μ^{+}μ^{} and e^{±}μ^{∓}). Furthermore, the absolute and normalized differential cross sections for ttbar 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 ttbarb and ttbarbbbar 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. Finally, the data are compared and found to be consistent with predictions from several perturbative quantum chromodynamics event generators and a nexttoleading ordercalculation.
 Authors:

 Yerevan Physics Inst. (YerPhI) (Armenia). et al.
 Publication Date:
 Research Org.:
 Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
 Sponsoring Org.:
 USDOE Office of Science (SC), High Energy Physics (HEP) (SC25)
 Contributing Org.:
 CMS Collaboration
 OSTI Identifier:
 1226339
 Alternate Identifier(s):
 OSTI ID: 1411634
 Report Number(s):
 FERMILABPUB15465CMS
Journal ID: ISSN 14346044; arXiv eprint number arXiv:1510.03072; TRN: US1601627
 Grant/Contract Number:
 AC0207CH11359; AC0205CH11231
 Resource Type:
 Accepted Manuscript
 Journal Name:
 European Physical Journal. C, Particles and Fields
 Additional Journal Information:
 Journal Volume: 76; Journal Issue: 379; Journal ID: ISSN 14346044
 Publisher:
 Springer
 Country of Publication:
 United States
 Language:
 English
 Subject:
 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Citation Formats
Khachatryan, Vardan. Measurement of $\mathrm{ t \bar{t} } $ production with additional jet activity, including b quark jets, in the dilepton decay channel using pp collisions at $\sqrt{s} =$ 8 TeV. United States: N. p., 2016.
Web. doi:10.1140/epjc/s100520164105x.
Khachatryan, Vardan. Measurement of $\mathrm{ t \bar{t} } $ production with additional jet activity, including b quark jets, in the dilepton decay channel using pp collisions at $\sqrt{s} =$ 8 TeV. United States. doi:10.1140/epjc/s100520164105x.
Khachatryan, Vardan. Thu .
"Measurement of $\mathrm{ t \bar{t} } $ production with additional jet activity, including b quark jets, in the dilepton decay channel using pp collisions at $\sqrt{s} =$ 8 TeV". United States. doi:10.1140/epjc/s100520164105x. https://www.osti.gov/servlets/purl/1226339.
@article{osti_1226339,
title = {Measurement of $\mathrm{ t \bar{t} } $ production with additional jet activity, including b quark jets, in the dilepton decay channel using pp collisions at $\sqrt{s} =$ 8 TeV},
author = {Khachatryan, Vardan},
abstractNote = {Jet multiplicity distributions in top quark pair (ttbar) events are measured in pp collisions at a centreofmass energy of 8 TeV with the CMS detector at the LHC using a data set corresponding to an integrated luminosity of 19.7 fb1. The measurement is performed in the dilepton decay channels (e+e,μ+μ and e±μ∓). Furthermore, the absolute and normalized differential cross sections for ttbar 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 ttbarb and ttbarbbbar 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. Finally, the data are compared and found to be consistent with predictions from several perturbative quantum chromodynamics event generators and a nexttoleading ordercalculation.},
doi = {10.1140/epjc/s100520164105x},
journal = {European Physical Journal. C, Particles and Fields},
number = 379,
volume = 76,
place = {United States},
year = {2016},
month = {7}
}
Web of Science
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Works referencing / citing this record:
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 Chatrchyan, S.; Khachatryan, V.; Sirunyan, A. M.
 The European Physical Journal C, Vol. 74, Issue 8
Top++: A program for the calculation of the toppair crosssection at hadron colliders
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 Czakon, Michał; Mitov, Alexander
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HERWIG 6: an event generator for hadron emission reactions with interfering gluons (including supersymmetric processes)
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 Corcella, Gennaro; Knowles, Ian G.; Marchesini, Giuseppe
 Journal of High Energy Physics, Vol. 2001, Issue 01
Measurement of differential topquarkpair production cross sections in pp collisions at $\sqrt{s} = 7\ \mathrm{TeV}$
journal, March 2013
 Chatrchyan, S.; Khachatryan, V.; Sirunyan, A. M.
 The European Physical Journal C, Vol. 73, Issue 3
Measurement of the $$t\overline{t}$$ t t ¯ production crosssection using $$e\mu $$ e μ events with $$b$$ b tagged jets in $$pp$$ p p collisions at $$\sqrt{s}=7$$ s = 7 and 8 TeV with the ATLAS detector
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 Cacciari, Matteo; Salam, Gavin P.; Soyez, Gregory
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 Frixione, Stefano; Webber, Bryan R.
 Journal of High Energy Physics, Vol. 2002, Issue 06
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 Mangano, Michelangelo L.; Moretti, Mauro; Piccinini, Fulvio
 Journal of High Energy Physics, Vol. 2007, Issue 01
The anti k _{ t } jet clustering algorithm
journal, April 2008
 Cacciari, Matteo; Salam, Gavin P.; Soyez, Gregory
 Journal of High Energy Physics, Vol. 2008, Issue 04
Study of the underlying event in top quark pair production in $$\mathrm {p}\mathrm {p}$$ p p collisions at 13 $$~\text {Te}\text {V}$$ Te
journal, February 2019
 Sirunyan, A. M.; Tumasyan, A.; Adam, W.
 The European Physical Journal C, Vol. 79, Issue 2
Measurement of $t\bar{t}$ production with a veto on additional central jet activity in pp collisions at $\sqrt{s}=7$ TeV using the ATLAS detector
journal, June 2012
 Aad, G.; Abbott, B.; Abdallah, J.
 The European Physical Journal C, Vol. 72, Issue 6
Measurement of the cross section ratio ${\sigma}_{\mathrm{t}\overline{\mathrm{t}}\mathrm{b}\overline{\mathrm{b}}}/{\sigma}_{\mathrm{t}\overline{\mathrm{t}}\mathrm{jj}}$ in $\mathrm{p}\mathrm{p}$ collisions at $\sqrt{s}=8\text{TeV}$
journal, June 2015
 Khachatryan, V.; Sirunyan, A. M.; Tumasyan, A.
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 Pumplin, Jonathan; Stump, Daniel Robert; Huston, Joey
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Search for t t ¯ H $$ \mathrm{t}\overline{\mathrm{t}}\mathrm{H} $$ production in the H → b b ¯ $$ \mathrm{H}\to \mathrm{b}\overline{\mathrm{b}} $$ decay channel with leptonic t t ¯ $$ \mathrm{t}\overline{\mathrm{t}} $$ decays in protonproton collisions at s = 13 $$ \sqrt{s}=13 $$ TeV
journal, March 2019
 Sirunyan, A. M.; Tumasyan, A.; Adam, W.
 Journal of High Energy Physics, Vol. 2019, Issue 3
Measurement of lepton differential distributions and the top quark mass in $$t\bar{t}$$ t t ¯ production in pp collisions at $$\sqrt{s}=8$$ s = 8 TeV with the ATLAS detector
journal, November 2017
 Aaboud, M.; Aad, G.; Abbott, B.
 The European Physical Journal C, Vol. 77, Issue 11
Study of the underlying event in top quark pair production in $$\mathrm {p}\mathrm {p}$$ p p collisions at 13 $$~\text {Te}\text {V}$$ Te
journal, February 2019
 Sirunyan, A. M.; Tumasyan, A.; Adam, W.
 The European Physical Journal C, Vol. 79, Issue 2