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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

Abstract

Jet multiplicity distributions in top quark pair (tt-bar) 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 19.7 fb-1. The measurement is performed in the dilepton decay channels (e+e-+μ- and e±μ). Furthermore, the absolute and normalized differential cross sections for tt-bar 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 tt-barb and tt-barbb-bar 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 next-to-leading ordercalculation.

Authors:
 [1]
  1. 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) (SC-25)
Contributing Org.:
CMS Collaboration
OSTI Identifier:
1226339
Alternate Identifier(s):
OSTI ID: 1411634
Report Number(s):
FERMILAB-PUB-15-465-CMS
Journal ID: ISSN 1434-6044; arXiv eprint number arXiv:1510.03072; TRN: US1601627
Grant/Contract Number:  
AC02-07CH11359; AC02-05CH11231
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 1434-6044
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/s10052-016-4105-x.
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/s10052-016-4105-x.
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/s10052-016-4105-x. 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 (tt-bar) 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 19.7 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 tt-bar 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 tt-barb and tt-barbb-bar 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 next-to-leading ordercalculation.},
doi = {10.1140/epjc/s10052-016-4105-x},
journal = {European Physical Journal. C, Particles and Fields},
number = 379,
volume = 76,
place = {United States},
year = {2016},
month = {7}
}

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    Works referencing / citing this record:

    Search for associated production of a Higgs boson and a single top quark in proton-proton collisions at s = 13 TeV
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