Measurements of t(t)over-bar differential cross sections in proton-proton collisions at root s=13 TeV using events containing two leptons

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Abstract

Measurements of differential top quark pair t (t) over bar cross sections using events produced in proton-proton collisions at a centre-of-mass energy of 13 TeV containing two oppositely charged leptons are presented. The data were recorded by the CMS experiment at the CERN LHC in 2016 and correspond to an integrated luminosity of 35.9 fb(-1). The differential cross sections are presented as functions of kinematic observables of the top quarks and their decay products, the t (t) over bar system, and the total number of jets in the event. The differential cross sections are de fined both with particle-level objects in a fiducial phase space close to that of the detector acceptance and with parton-level top quarks in the full phase space. All results are compared with standard model predictions from Monte Carlo simulations with next-to-leading-order (NLO) accuracy in quantum chromodynamics (QCD) at matrix-element level interfaced to parton-shower simulations. Where possible, parton-level results are compared to calculations with beyond-NLO precision in QCD. Significant disagreement is observed between data and all predictions for several observables. The measurements are used to constrain the top quark chromomagnetic dipole moment in an effective field theory framework at NLO in QCD and to extract t (t) over bar and leptonic charge asymmetries.
Original languageEnglish
Article number149
JournalJournal of High Energy Physics
Volume2019
Issue number2
Number of pages110
ISSN1029-8479
DOIs
Publication statusPublished - 22 Feb 2019
MoE publication typeA1 Journal article-refereed

Fields of Science

  • 114 Physical sciences
  • Hadron-Hadron scattering (experiments)
  • Top physics
  • PLUS PLUS

Cite this

@article{969192df05da4a0e8a1287da727e3d40,
title = "Measurements of t(t)over-bar differential cross sections in proton-proton collisions at root s=13 TeV using events containing two leptons",
abstract = "Measurements of differential top quark pair t (t) over bar cross sections using events produced in proton-proton collisions at a centre-of-mass energy of 13 TeV containing two oppositely charged leptons are presented. The data were recorded by the CMS experiment at the CERN LHC in 2016 and correspond to an integrated luminosity of 35.9 fb(-1). The differential cross sections are presented as functions of kinematic observables of the top quarks and their decay products, the t (t) over bar system, and the total number of jets in the event. The differential cross sections are de fined both with particle-level objects in a fiducial phase space close to that of the detector acceptance and with parton-level top quarks in the full phase space. All results are compared with standard model predictions from Monte Carlo simulations with next-to-leading-order (NLO) accuracy in quantum chromodynamics (QCD) at matrix-element level interfaced to parton-shower simulations. Where possible, parton-level results are compared to calculations with beyond-NLO precision in QCD. Significant disagreement is observed between data and all predictions for several observables. The measurements are used to constrain the top quark chromomagnetic dipole moment in an effective field theory framework at NLO in QCD and to extract t (t) over bar and leptonic charge asymmetries.",
keywords = "114 Physical sciences, Hadron-Hadron scattering (experiments), Top physics, PLUS PLUS",
author = "{The CMS Collaboration} and Sirunyan, {A. M.} and P. Eerola and H. Kirschenmann and J. Pekkanen and M. Voutilainen and J. Havukainen and Heikkil{\"a}, {J. K.} and T. J{\"a}rvinen and V. Karim{\"a}ki and R. Kinnunen and T. Lamp{\'e}n and K. Lassila-Perini and S. Laurila and S. Lehti and T. Lind{\'e}n and P. Luukka and T. M{\"a}enp{\"a}{\"a} and H. Siikonen and E. Tuominen and J. Tuominiemi and T. Tuuva",
year = "2019",
month = "2",
day = "22",
doi = "10.1007/JHEP02(2019)149",
language = "English",
volume = "2019",
journal = "Journal of High Energy Physics",
issn = "1029-8479",
publisher = "Springer",
number = "2",

}

TY - JOUR

T1 - Measurements of t(t)over-bar differential cross sections in proton-proton collisions at root s=13 TeV using events containing two leptons

AU - The CMS Collaboration

AU - Sirunyan, A. M.

AU - Eerola, P.

AU - Kirschenmann, H.

AU - Pekkanen, J.

AU - Voutilainen, M.

AU - Havukainen, J.

AU - Heikkilä, J. K.

AU - Järvinen, T.

AU - Karimäki, V.

AU - Kinnunen, R.

AU - Lampén, T.

AU - Lassila-Perini, K.

AU - Laurila, S.

AU - Lehti, S.

AU - Lindén, T.

AU - Luukka, P.

AU - Mäenpää, T.

AU - Siikonen, H.

AU - Tuominen, E.

AU - Tuominiemi, J.

AU - Tuuva, T.

PY - 2019/2/22

Y1 - 2019/2/22

N2 - Measurements of differential top quark pair t (t) over bar cross sections using events produced in proton-proton collisions at a centre-of-mass energy of 13 TeV containing two oppositely charged leptons are presented. The data were recorded by the CMS experiment at the CERN LHC in 2016 and correspond to an integrated luminosity of 35.9 fb(-1). The differential cross sections are presented as functions of kinematic observables of the top quarks and their decay products, the t (t) over bar system, and the total number of jets in the event. The differential cross sections are de fined both with particle-level objects in a fiducial phase space close to that of the detector acceptance and with parton-level top quarks in the full phase space. All results are compared with standard model predictions from Monte Carlo simulations with next-to-leading-order (NLO) accuracy in quantum chromodynamics (QCD) at matrix-element level interfaced to parton-shower simulations. Where possible, parton-level results are compared to calculations with beyond-NLO precision in QCD. Significant disagreement is observed between data and all predictions for several observables. The measurements are used to constrain the top quark chromomagnetic dipole moment in an effective field theory framework at NLO in QCD and to extract t (t) over bar and leptonic charge asymmetries.

AB - Measurements of differential top quark pair t (t) over bar cross sections using events produced in proton-proton collisions at a centre-of-mass energy of 13 TeV containing two oppositely charged leptons are presented. The data were recorded by the CMS experiment at the CERN LHC in 2016 and correspond to an integrated luminosity of 35.9 fb(-1). The differential cross sections are presented as functions of kinematic observables of the top quarks and their decay products, the t (t) over bar system, and the total number of jets in the event. The differential cross sections are de fined both with particle-level objects in a fiducial phase space close to that of the detector acceptance and with parton-level top quarks in the full phase space. All results are compared with standard model predictions from Monte Carlo simulations with next-to-leading-order (NLO) accuracy in quantum chromodynamics (QCD) at matrix-element level interfaced to parton-shower simulations. Where possible, parton-level results are compared to calculations with beyond-NLO precision in QCD. Significant disagreement is observed between data and all predictions for several observables. The measurements are used to constrain the top quark chromomagnetic dipole moment in an effective field theory framework at NLO in QCD and to extract t (t) over bar and leptonic charge asymmetries.

KW - 114 Physical sciences

KW - Hadron-Hadron scattering (experiments)

KW - Top physics

KW - PLUS PLUS

U2 - 10.1007/JHEP02(2019)149

DO - 10.1007/JHEP02(2019)149

M3 - Article

VL - 2019

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

SN - 1029-8479

IS - 2

M1 - 149

ER -