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 centreofmass energy of 8 TeV with the CMS detector at the LHC using a data set corresponding to an integrated luminosity of 19.7fb1. 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 »
 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)
 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. https://doi.org/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. https://doi.org/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. https://doi.org/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 = {© 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 centreofmass energy of 8 TeV with the CMS detector at the LHC using a data set corresponding to an integrated luminosity of 19.7fb1. 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 nexttoleading order calculation.},
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
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
HelacNlo
journal, March 2013
 Bevilacqua, G.; Czakon, M.; Garzelli, M. V.
 Computer Physics Communications, Vol. 184, Issue 3
Matching NLO QCD computations and parton shower simulations
journal, June 2002
 Frixione, Stefano; Webber, Bryan R.
 Journal of High Energy Physics, Vol. 2002, Issue 06
Identification of bquark jets with the CMS experiment
journal, April 2013
 collaboration, The CMS
 Journal of Instrumentation, Vol. 8, Issue 04
FastJet user manual: (for version 3.0.2)
journal, March 2012
 Cacciari, Matteo; Salam, Gavin P.; Soyez, Gregory
 The European Physical Journal C, Vol. 72, Issue 3
Measurement of the $ {{\rm t}\bar{\rm t}} $ production cross section and the top quark mass in the dilepton channel in pp collisions at $ \sqrt {s} = 7 $ TeV
journal, July 2011
 Chatrchyan, S.; Khachatryan, V.; Sirunyan, A. M.
 Journal of High Energy Physics, Vol. 2011, Issue 7
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
Determination of jet energy calibration and transverse momentum resolution in CMS
journal, November 2011
 collaboration, The CMS
 Journal of Instrumentation, Vol. 6, Issue 11
New parton distributions for collider physics
journal, October 2010
 Lai, HungLiang; Guzzi, Marco; Huston, Joey
 Physical Review D, Vol. 82, Issue 7
On the ratio of t t ¯ b b ¯ $$ t\overline{t} b\overline{b} $$ and t t ¯ jj $$ t\overline{t} jj $$ cross sections at the CERN Large Hadron Collider
journal, July 2014
 Bevilacqua, G.; Worek, M.
 Journal of High Energy Physics, Vol. 2014, Issue 7
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
Measurements of normalized differential cross sections for $t\overline{t}$ production in $pp$ collisions at $\sqrt{(s)}=7\text{\hspace{0.17em}}\text{\hspace{0.17em}}\mathrm{TeV}$ using the ATLAS detector
journal, October 2014
 Aad, G.; Abajyan, T.; Abbott, B.
 Physical Review D, Vol. 90, Issue 7
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
PYTHIA 6.4 physics and manual
journal, May 2006
 Sjöstrand, Torbjörn; Mrenna, Stephen; Skands, Peter
 Journal of High Energy Physics, Vol. 2006, Issue 05
The automated computation of treelevel and nexttoleading 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
Performance of the CMS missing transverse momentum reconstruction in pp data at √ s = 8 TeV
journal, February 2015
 collaboration, The CMS
 Journal of Instrumentation, Vol. 10, Issue 02
Uncertainties on α S in global PDF analyses and implications for predicted hadronic cross sections
journal, October 2009
 Martin, A. D.; Stirling, W. J.; Thorne, R. S.
 The European Physical Journal C, Vol. 64, Issue 4
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
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
Twoloop soft anomalous dimensions for single top quark associated production with a ${W}^{}$ or ${H}^{}$
journal, September 2010
 Kidonakis, Nikolaos
 Physical Review D, Vol. 82, Issue 5
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
CT10 nexttonexttoleading order global analysis of QCD
journal, February 2014
 Gao, Jun; Guzzi, Marco; Huston, Joey
 Physical Review D, Vol. 89, Issue 3
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
The catchment area of jets
journal, April 2008
 Cacciari, Matteo; Salam, Gavin P.; Soyez, Gregory
 Journal of High Energy Physics, Vol. 2008, Issue 04
Performance of electron reconstruction and selection with the CMS detector in protonproton collisions at √ s = 8 TeV
journal, June 2015
 ,
 Journal of Instrumentation, Vol. 10, Issue 06, p. P06005P06005
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.
 Physics Letters B, Vol. 746
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
Measurement of the top pair production cross section in 8 TeV protonproton collisions using kinematic information in the $\mathbf{\text{lepton}}+\mathbf{\text{jets}}$ final state with ATLAS
journal, June 2015
 Aad, G.; Abbott, B.; Abdallah, J.
 Physical Review D, Vol. 91, Issue 11
Measurement of the Top Quark Mass Using Dilepton Events
journal, March 1998
 Abbott, B.; Abolins, M.; Acharya, B. S.
 Physical Review Letters, Vol. 80, Issue 10
Missing transverse energy performance of the CMS detector
journal, September 2011
 collaboration, The CMS
 Journal of Instrumentation, Vol. 6, Issue 09
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
Performance of CMS muon reconstruction in pp collision events at √s = 7 TeV
journal, October 2012
 collaboration, The CMS
 Journal of Instrumentation, Vol. 7, Issue 10
Matching NLO QCD computations with parton shower simulations: the POWHEG method
journal, November 2007
 Frixione, Stefano; Nason, Paolo; Oleari, Carlo
 Journal of High Energy Physics, Vol. 2007, Issue 11
The CMS experiment at the CERN LHC
journal, August 2008
 Collaboration, The CMS; Chatrchyan, S.; Hmayakyan, G.
 Journal of Instrumentation, Vol. 3, Issue 08
Merging meets matching in MC@NLO
journal, December 2012
 Frederix, Rikkert; Frixione, Stefano
 Journal of High Energy Physics, Vol. 2012, Issue 12
New Generation of Parton Distributions with Uncertainties from Global QCD Analysis
journal, July 2002
 Pumplin, Jonathan; Stump, Daniel Robert; Huston, Joey
 Journal of High Energy Physics, Vol. 2002, Issue 07
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
Parton distributions with LHC data
journal, February 2013
 Ball, Richard D.; Bertone, Valerio; Carrazza, Stefano
 Nuclear Physics B, Vol. 867, Issue 2
Automatic spinentangled 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
Electroweak gauge boson production at hadron colliders through $\mathcal{O}({\alpha}_{s}^{2})$
journal, December 2006
 Melnikov, Kirill; Petriello, Frank
 Physical Review D, Vol. 74, Issue 11
Description and performance of track and primaryvertex reconstruction with the CMS tracker
journal, October 2014
 Collaboration, The CMS
 Journal of Instrumentation, Vol. 9, Issue 10
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
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
MadGraph 5: going beyond
journal, June 2011
 Alwall, Johan; Herquet, Michel; Maltoni, Fabio
 Journal of High Energy Physics, Vol. 2011, Issue 6
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
journal, October 2014
 Aad, G.; Abbott, B.; Abdallah, J.
 The European Physical Journal C, Vol. 74, Issue 10
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
 Khachatryan, V.; Sirunyan, A. M.; Tumasyan, A.
 The European Physical Journal C, Vol. 75, Issue 11
Search for the associated production of the Higgs boson with a topquark pair
journal, September 2014
 Khachatryan, V.; Sirunyan, A. M.; Tumasyan, A.
 Journal of High Energy Physics, Vol. 2014, Issue 9
Tuning Monte Carlo generators: The Perugia tunes
journal, October 2010
 Skands, Peter Z.
 Physical Review D, Vol. 82, Issue 7
Matching matrix elements and shower evolution for toppair production in hadronic collisions
journal, January 2007
 Mangano, Michelangelo L.; Moretti, Mauro; Piccinini, Fulvio
 Journal of High Energy Physics, Vol. 2007, Issue 01
Measurements of top quark pair relative differential crosssections with ATLAS in pp collisions at $\sqrt{s} = 7\ \mbox{TeV}$
journal, January 2013
 Aad, G.; Abajyan, T.; Abbott, B.
 The European Physical Journal C, Vol. 73, Issue 1
A New Method for Combining NLO QCD with Shower Monte Carlo Algorithms
journal, November 2004
 Nason, Paolo
 Journal of High Energy Physics, Vol. 2004, Issue 11
WHIZARD—simulating multiparticle processes at LHC and ILC
journal, September 2011
 Kilian, Wolfgang; Ohl, Thorsten; Reuter, Jürgen
 The European Physical Journal C, Vol. 71, Issue 9
Top++: A program for the calculation of the toppair crosssection at hadron colliders
journal, November 2014
 Czakon, Michał; Mitov, Alexander
 Computer Physics Communications, Vol. 185, Issue 11
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
Measurement of jet multiplicity distributions in $$\mathrm {t}\overline{\mathrm {t}}$$ t t ¯ production in pp collisions at $$\sqrt{s} = 7\,\text {TeV} $$ s = 7 TeV
journal, August 2014
 Chatrchyan, S.; Khachatryan, V.; Sirunyan, A. M.
 The European Physical Journal C, Vol. 74, Issue 8
$W$ Boson Production Cross Section at the Large Hadron Collider with $\mathcal{O}({\alpha}_{s}^{2})$ Corrections
journal, June 2006
 Melnikov, Kirill; Petriello, Frank
 Physical Review Letters, Vol. 96, Issue 23
Handbook of LHC Higgs Cross Sections: 3. Higgs Properties: Report of the LHC Higgs Cross Section Working Group
null, January 2013
 Potter, C. T.; Mantler, H.; Lehti, S.
 CERN
QCD corrections to top quark pair production in association with a photon at hadron colliders
journal, April 2011
 Melnikov, Kirill; Schulze, Markus; Scharf, Andreas
 Physical Review D, Vol. 83, Issue 7
Search for the associated production of the Higgs boson with a topquark pair
text, January 2014
 Khachatryan, V.; Sirunyan, A. M.; Tumasyan, A.
 RWTH Aachen University
Works referencing / citing this record:
A comprehensive framework for studying W ′ and Z ′ bosons at hadron colliders with automated jet veto resummation
journal, May 2017
 Fuks, Benjamin; Ruiz, Richard
 Journal of High Energy Physics, Vol. 2017, Issue 5
Measurements of differential cross sections of top quark pair production in association with jets in pp collisions at s = 13 $$ \sqrt{s}=13 $$ TeV using the ATLAS detector
journal, October 2018
 Aaboud, M.; Aad, G.; Abbott, B.
 Journal of High Energy Physics, Vol. 2018, Issue 10
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
Measurement of the differential cross sections for top quark pair production as a function of kinematic event variables in $pp$ collisions at $\sqrt{s}=7$ and 8 TeV
journal, September 2016
 Khachatryan, V.; Sirunyan, A. M.; Tumasyan, A.
 Physical Review D, Vol. 94, Issue 5
Searches for $R$ parityviolating supersymmetry in $pp$ collisions at $\sqrt{s}=8\text{\hspace{0.17em}}\text{\hspace{0.17em}}\mathrm{TeV}$ in final states with 0–4 leptons
journal, December 2016
 Khachatryan, V.; Sirunyan, A. M.; Tumasyan, A.
 Physical Review D, Vol. 94, Issue 11
Measurement of differential cross sections for the production of top quark pairs and of additional jets in $\mathrm{lepton}+\text{jets}$ events from $pp$ collisions at $\sqrt{s}=13\text{\hspace{0.17em}}\text{\hspace{0.17em}}\mathrm{TeV}$
journal, June 2018
 Sirunyan, A. M.; Tumasyan, A.; Adam, W.
 Physical Review D, Vol. 97, Issue 11
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