Name: CMS_2015_I1397174
Year: 2016
Summary: Measurement of ttbar production with additional jet activity, including b quark jets, in the dilepton decay channel using pp collisions at sqrt(s)=8 TeV
Experiment: CMS
Collider: LHC
InspireID: 1397174
Status: VALIDATED
Reentrant: true
Authors:
 - Javier Fernandez <Javier.Fernandez@cern.ch>
 - Jungwan John Goh <Junghwan.Goh@cern.ch>
 - Efe Yazgan <efe.yazgan@cern.ch>
 - Markus Seidel <markus.seidel@cern.ch>
 - James Keaveney <james.keaveney@vub.ac.be>
 - Elvire Bouvier <e.bouvier@cern.ch>
 - Benedikt Maier <benedikt.maier@cern.ch>
 - Andy Buckley <andy.buckley@cern.ch>
References:
 - arXiv:1510.03072
RunInfo:
  'ttbar events at $\sqrt{s}=8~\TeV. Top quarks are expected in the event record to identify
   additional jets. Gap fractions require high statistics in a single run or custom merging of
   the YODA files.'
Luminosity: 19.7/fb
Beams: [p+, p+]
Energies: [8000]
Description:
    'Jet multiplicity distributions in top quark pair ($t\bar{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 19.7/fb. The measurement is
     performed in the dilepton decay channels $e^+e^-$, $\mu^+\mu^-$, and $e^\pm\mu^\mp$).
     The absolute and normalized differential cross-sections for $t\bar{t}$ production are
     measured as a function of jet multiplicity for different jet transverse momentum thresholds
     and the kinematic properties of the leading additional jets. The differential $t\bar{t}b$
     and $t\bar{t}b\bar{b}$ 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.'
BibKey: Khachatryan:2015mva
BibTeX: '@article{Khachatryan:2015mva,
      author         = "Khachatryan, Vardan and others",
      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 $\sqrt{s} = 8~\TeV$}",
      collaboration  = "CMS",
      year           = "2015",
      eprint         = "1510.03072",
      archivePrefix  = "arXiv",
      primaryClass   = "hep-ex",
      reportNumber   = "CMS-TOP-12-041, CERN-PH-EP-2015-240",
      SLACcitation   = "%%CITATION = ARXIV:1510.03072;%%"
}'

ReleaseTests:
 - $A LHC-8-Top-All

