Measurement of differential $\mathrm{t\bar{t}}$ production cross sections using top quarks at large transverse momenta in $pp$ collisions at $\sqrt{s} =$ 13 TeV - INSPIRE

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Measurement of differential $\mathrm{t\bar{t}}$ production cross sections using top quarks at large transverse momenta in $pp$ collisions at $\sqrt{s} =$ 13 TeV

CMS

Collaboration

Aug 18, 2020

43 pages

Published in:

Phys.Rev.D 103 (2021) 5, 052008

Published: Mar 20, 2021

e-Print:

2008.07860 [hep-ex]

DOI:

10.1103/PhysRevD.103.052008

Report number:

CMS-TOP-18-013,
CERN-EP-2020-121

Experiments:

CERN-LHC-CMS

View in:

reference search45 citations

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Abstract: (APS)

A measurement is reported of differential top quark pair (tt¯) production cross sections, where top quarks are produced at large transverse momenta. The data collected with the CMS detector at the LHC are from pp collisions at a center-of-mass energy of 13 TeV corresponding to an integrated luminosity of 35.9 fb-1. The measurement uses events where at least one top quark decays as t→Wb→qq¯′b and is reconstructed as a large-radius jet with transverse momentum in excess of 400 GeV. The second top quark is required to decay either in a similar way or leptonically, as inferred from a reconstructed electron or muon, a bottom quark jet, and missing transverse momentum due to the undetected neutrino. The cross section is extracted as a function of kinematic variables of individual top quarks or of the tt¯ system. The results are presented at the particle level, within a region of phase space close to that of the experimental acceptance, and at the parton level and are compared to various theoretical models. In both decay channels, the observed absolute cross sections are significantly lower than the predictions from theory, while the normalized differential measurements are well described.

Note:

Replaced with the published version. Added the journal reference and the DOI. All the figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/TOP-18-013 (CMS Public Pages)

Particle Physics Experiments
p p: colliding beams
top: pair production
p p: scattering
top: decay modes
transverse momentum: missing-energy
jet: bottom
final state: ((n)jet)
final state: ((n)jet lepton)
bottom: particle identification

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