Inclusive and differential cross-sections for dilepton $ t\overline{t} $ production measured in $ \sqrt{s} $ = 13 TeV pp collisions with the ATLAS detector - INSPIRE

Inclusive and differential cross-sections for dilepton $t\overline{t}$ production measured in $\sqrt{s}$ = 13 TeV pp collisions with the ATLAS detector

ATLAS

Collaboration

Mar 27, 2023

71 pages

Published in:

JHEP 07 (2023) 141

Published: Jul 17, 2023

e-Print:

2303.15340 [hep-ex]

DOI:

10.1007/JHEP07(2023)141

PDG:

{{\mathit t}}{{\overline{\mathit t}}}

Production Cross Section in

{{\mathit p}}{{\mathit p}}

\sqrt {s }

Report number:

CERN-EP-2023-016

Experiments:

CERN-LHC-ATLAS

View in:

reference search79 citations

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Abstract: (Springer)

Differential and double-differential distributions of kinematic variables of leptons from decays of top-quark pairs (

t\overline{t}

) are measured using the full LHC Run 2 data sample collected with the ATLAS detector. The data were collected at a pp collision energy of

\sqrt{s}

= 13 TeV and correspond to an integrated luminosity of 140 fb

^{−1}

. The measurements use events containing an oppositely charged eμ pair and b-tagged jets. The results are compared with predictions from several Monte Carlo generators. While no prediction is found to be consistent with all distributions, a better agreement with measurements of the lepton p

_{T}

distributions is obtained by reweighting the

t\overline{t}

sample so as to reproduce the top-quark p

_{T}

distribution from an NNLO calculation. The inclusive top-quark pair production cross-section is measured as well, both in a fiducial region and in the full phase-space. The total inclusive cross-section is found to be

{\sigma}_{t\overline{t}}=829\pm 1\ \left(\textrm{stat}\right)\pm 13\ \left(\textrm{syst}\right)\pm 8\ \left(\textrm{lumi}\right)\pm 2\ \left(\textrm{beam}\right)\ \textrm{pb},

where the uncertainties are due to statistics, systematic effects, the integrated luminosity and the beam energy. This is in excellent agreement with the theoretical expectation.[graphic not available: see fulltext]

Note:

71 pages in total, author list starting page 54, 13 figures, 29 tables. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TOPQ-2018-26/

Hadron-Hadron Scattering
Top Physics
p p: colliding beams
top: pair production
p p: scattering
beam: energy
top: decay
lepton: transverse momentum
transverse momentum: momentum spectrum
ATLAS

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