DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

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

© 2016, CERN for the benefit of the CMS collaboration. 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 perturbativemore » quantum chromodynamics event generators and a next-to-leading order calculation.« less

Authors:
 [1]
  1. Yerevan Physics Inst. (YerPhI) (Armenia). et al.
Publication Date:
Research Org.:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP)
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. https://doi.org/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. https://doi.org/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 = {© 2016, CERN for the benefit of the CMS collaboration. 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.},
doi = {10.1140/epjc/s10052-016-4105-x},
journal = {European Physical Journal. C, Particles and Fields},
number = 379,
volume = 76,
place = {United States},
year = {Thu Jul 07 00:00:00 EDT 2016},
month = {Thu Jul 07 00:00:00 EDT 2016}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 25 works
Citation information provided by
Web of Science

Save / Share:

Works referenced in this record:

SVD approach to data unfolding
journal, April 1996

  • Höcker, Andreas; Kartvelishvili, Vakhtang
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 372, Issue 3
  • DOI: 10.1016/0168-9002(95)01478-0

Helac-Nlo
journal, March 2013

  • Bevilacqua, G.; Czakon, M.; Garzelli, M. V.
  • Computer Physics Communications, Vol. 184, Issue 3
  • DOI: 10.1016/j.cpc.2012.10.033

Matching NLO QCD computations and parton shower simulations
journal, June 2002


Identification of b-quark jets with the CMS experiment
journal, April 2013


FastJet user manual: (for version 3.0.2)
journal, March 2012


Measurement of the $ t\overline{t} $ production cross section in the dilepton channel in pp collisions at $ \sqrt{s} $ = 8 TeV
journal, February 2014

  • Chatrchyan, S.; Khachatryan, V.; Sirunyan, A. M.
  • Journal of High Energy Physics, Vol. 2014, Issue 2
  • DOI: 10.1007/JHEP02(2014)024

Determination of jet energy calibration and transverse momentum resolution in CMS
journal, November 2011


New parton distributions for collider physics
journal, October 2010


Review of Particle Physics
journal, August 2014


A general framework for implementing NLO calculations in shower Monte Carlo programs: the POWHEG BOX
journal, June 2010

  • Alioli, Simone; Nason, Paolo; Oleari, Carlo
  • Journal of High Energy Physics, Vol. 2010, Issue 6
  • DOI: 10.1007/JHEP06(2010)043

PYTHIA 6.4 physics and manual
journal, May 2006

  • Sjöstrand, Torbjörn; Mrenna, Stephen; Skands, Peter
  • Journal of High Energy Physics, Vol. 2006, Issue 05
  • DOI: 10.1088/1126-6708/2006/05/026

The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
journal, July 2014

  • Alwall, J.; Frederix, R.; Frixione, S.
  • Journal of High Energy Physics, Vol. 2014, Issue 7
  • DOI: 10.1007/JHEP07(2014)079

Performance of the CMS missing transverse momentum reconstruction in pp data at √ s = 8 TeV
journal, February 2015


Uncertainties on α S in global PDF analyses and implications for predicted hadronic cross sections
journal, October 2009


Measurement of the $ \mathrm{t}\overline{\mathrm{t}} $ production cross section in the dilepton channel in pp collisions at $ \sqrt{s}=7 $ TeV
journal, November 2012

  • Chatrchyan, S.; Khachatryan, V.; Sirunyan, A. M.
  • Journal of High Energy Physics, Vol. 2012, Issue 11
  • DOI: 10.1007/JHEP11(2012)067

Measurement of differential top-quark-pair production cross sections in pp collisions at $\sqrt{s} = 7\ \mathrm{TeV}$
journal, March 2013


HERWIG 6: an event generator for hadron emission reactions with interfering gluons (including supersymmetric processes)
journal, January 2001

  • Corcella, Gennaro; Knowles, Ian G.; Marchesini, Giuseppe
  • Journal of High Energy Physics, Vol. 2001, Issue 01
  • DOI: 10.1088/1126-6708/2001/01/010

CT10 next-to-next-to-leading order global analysis of QCD
journal, February 2014


t $ \bar{\mathrm{t}} $ W± + t $ \bar{\mathrm{t}} $ Z hadroproduction at NLO accuracy in QCD with Parton Shower and Hadronization effects
journal, November 2012

  • Garzelli, M. V.; Kardos, A.; Papadopoulos, C. G.
  • Journal of High Energy Physics, Vol. 2012, Issue 11
  • DOI: 10.1007/JHEP11(2012)056

The catchment area of jets
journal, April 2008


Measurement of the cross section ratio σ t t ¯ b b ¯ / σ t t ¯ jj in p p collisions at s = 8 TeV
journal, June 2015


Geant4—a simulation toolkit
journal, July 2003

  • Agostinelli, S.; Allison, J.; Amako, K.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 506, Issue 3
  • DOI: 10.1016/S0168-9002(03)01368-8

Measurement of the Top Quark Mass Using Dilepton Events
journal, March 1998


Missing transverse energy performance of the CMS detector
journal, September 2011


Parton distributions for the LHC run II
journal, April 2015

  • Ball, Richard D.; Bertone, Valerio; Carrazza, Stefano
  • Journal of High Energy Physics, Vol. 2015, Issue 4
  • DOI: 10.1007/JHEP04(2015)040

Performance of CMS muon reconstruction in pp collision events at √s = 7 TeV
journal, October 2012


Matching NLO QCD computations with parton shower simulations: the POWHEG method
journal, November 2007


The CMS experiment at the CERN LHC
journal, August 2008


Merging meets matching in MC@NLO
journal, December 2012

  • Frederix, Rikkert; Frixione, Stefano
  • Journal of High Energy Physics, Vol. 2012, Issue 12
  • DOI: 10.1007/JHEP12(2012)061

New Generation of Parton Distributions with Uncertainties from Global QCD Analysis
journal, July 2002


Hadroproduction of t t ¯ b b ¯ $$ t\overline{t}b\overline{b} $$ final states at LHC: predictions at NLO accuracy matched with parton shower
journal, March 2015

  • Garzelli, M. V.; Kardos, A.; Trócsányi, Z.
  • Journal of High Energy Physics, Vol. 2015, Issue 3
  • DOI: 10.1007/JHEP03(2015)083

Parton distributions with LHC data
journal, February 2013


Automatic spin-entangled decays of heavy resonances in Monte Carlo simulations
journal, March 2013

  • Artoisenet, Pierre; Frederix, Rikkert; Mattelaer, Olivier
  • Journal of High Energy Physics, Vol. 2013, Issue 3
  • DOI: 10.1007/JHEP03(2013)015

Electroweak gauge boson production at hadron colliders through O ( α s 2 )
journal, December 2006


Description and performance of track and primary-vertex reconstruction with the CMS tracker
journal, October 2014


Vector boson pair production at the LHC
journal, July 2011

  • Campbell, John M.; Ellis, R. Keith; Williams, Ciaran
  • Journal of High Energy Physics, Vol. 2011, Issue 7
  • DOI: 10.1007/JHEP07(2011)018

The anti- k t jet clustering algorithm
journal, April 2008


MadGraph 5: going beyond
journal, June 2011

  • Alwall, Johan; Herquet, Michel; Maltoni, Fabio
  • Journal of High Energy Physics, Vol. 2011, Issue 6
  • DOI: 10.1007/JHEP06(2011)128

Measurement of the differential cross section for top quark pair production in pp collisions at $$\sqrt{s} = 8\,\text {TeV} $$ s = 8 TeV
journal, November 2015


Search for the associated production of the Higgs boson with a top-quark pair
journal, September 2014

  • Khachatryan, V.; Sirunyan, A. M.; Tumasyan, A.
  • Journal of High Energy Physics, Vol. 2014, Issue 9
  • DOI: 10.1007/JHEP09(2014)087

Tuning Monte Carlo generators: The Perugia tunes
journal, October 2010


Matching matrix elements and shower evolution for top-pair production in hadronic collisions
journal, January 2007

  • Mangano, Michelangelo L.; Moretti, Mauro; Piccinini, Fulvio
  • Journal of High Energy Physics, Vol. 2007, Issue 01
  • DOI: 10.1088/1126-6708/2007/01/013

Measurements of top quark pair relative differential cross-sections with ATLAS in pp collisions at $\sqrt{s} = 7\ \mbox{TeV}$
journal, January 2013


A New Method for Combining NLO QCD with Shower Monte Carlo Algorithms
journal, November 2004


WHIZARD—simulating multi-particle processes at LHC and ILC
journal, September 2011


Top++: A program for the calculation of the top-pair cross-section at hadron colliders
journal, November 2014


Measurement of the cross section and angular correlations for associated production of a Z boson with b hadrons in pp collisions at $ \sqrt{s} $ = 7 TeV
journal, December 2013

  • Chatrchyan, S.; Khachatryan, V.; Sirunyan, A. M.
  • Journal of High Energy Physics, Vol. 2013, Issue 12
  • DOI: 10.1007/JHEP12(2013)039

W Boson Production Cross Section at the Large Hadron Collider with O ( α s 2 ) Corrections
journal, June 2006


QCD corrections to top quark pair production in association with a photon at hadron colliders
journal, April 2011


Search for the associated production of the Higgs boson with a top-quark pair
text, January 2014


Statistical methods in experimental Physics
journal, January 1973


Performance of Electron Reconstruction and Selection with the CMS Detector in Proton-Proton Collisions at √s = 8 TeV
text, January 2015


Review of Particle Physics
text, January 2008


Merging meets matching in MC@NLO
text, January 2012


Search for the associated production of the Higgs boson with a top-quark pair
text, January 2014


Statistical Methods in Experimental Physics
journal, August 1972

  • Simmonds, W. H.
  • Optica Acta: International Journal of Optics, Vol. 19, Issue 8
  • DOI: 10.1080/713818633

Performance of CMS muon reconstruction in pp collision events at √s = 7 TeV
text, January 2012


Review of Particle Physics
text, January 2012

  • Beringer, J.; Arguin, J.; Barnett, R.
  • Deutsches Elektronen-Synchrotron, DESY, Hamburg
  • DOI: 10.3204/phppubdb-24149

Missing transverse energy performance of the CMS detector
text, January 2011

  • Collaboration, Cms; Amsler, C.; Chiochia, V.
  • IOP Publishing Ltd
  • DOI: 10.5167/uzh-59469

Missing transverse energy performance of the CMS detector
text, January 2011


Matching NLO QCD computations with Parton Shower simulations: the POWHEG method
text, January 2007


The anti-k_t jet clustering algorithm
text, January 2008


Vector boson pair production at the LHC
text, January 2011


Parton distributions with LHC data
text, January 2012


Automatic spin-entangled decays of heavy resonances in Monte Carlo simulations
text, January 2012


Matching NLO QCD computations and parton shower simulations
text, January 2002


Determination of jet energy calibration and transverse momentum resolution in CMS
text, January 2011


Works referencing / citing this record:

Measurement of the mass of the top quark in decays with a J/ψ meson in pp collisions at 8 TeV
journal, December 2016

  • Khachatryan, V.; Sirunyan, A. M.; Tumasyan, A.
  • Journal of High Energy Physics, Vol. 2016, Issue 12
  • DOI: 10.1007/jhep12(2016)123

Searches for R -parity-violating supersymmetry in p p collisions at s = 8     TeV in final states with 0–4 leptons
journal, December 2016


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


Top-quark physics at the Large Hadron Collider
journal, May 2017


Search for associated production of a Higgs boson and a single top quark in proton-proton collisions at s = 13     TeV
journal, May 2019


Off-shell top quarks with one jet at the LHC: a comprehensive analysis at NLO QCD
text, January 2016


Searches for R-parity-violating supersymmetry in pp collisions at √s=8 TeV in final states with 0–4 leptons
text, January 2016


Measurement of the mass of the top quark in decays with a $J/\psi$ meson in pp collisions at 8 TeV
text, January 2016


Top-quark physics at the Large Hadron Collider
text, January 2016