Measurement of the total and differential cross-sections of $ t\overline{t}W $ production in pp collisions at $ \sqrt{s} $ = 13 TeV with the ATLAS detector - INSPIRE

Measurement of the total and differential cross-sections of $t\overline{t}W$ production in pp collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector

ATLAS

Collaboration

Jan 10, 2024

71 pages

Published in:

JHEP 05 (2024) 131,
JHEP 05 (2024) 131

Published: May 10, 2024
and
Published: May, 2024

e-Print:

2401.05299 [hep-ex]

DOI:

10.1007/JHEP05(2024)131

Report number:

CERN-EP-2023-260

Experiments:

CERN-LHC-ATLAS,
CERN-LHC-ATLAS

View in:

reference search24 citations

Citations per year

Abstract: (Springer)

Measurements of inclusive and differential production cross-sections of a top-quark-top-antiquark pair in association with a W boson (

t\overline{t}W

) are presented. They are performed by targeting final states with two same-sign or three isolated leptons (electrons or muons) and are based on

\sqrt{s}

= 13 TeV proton-proton collision data with an integrated luminosity of 140 fb

^{−1}

, recorded from 2015 to 2018 with the ATLAS detector at the Large Hadron Collider. The inclusive

t\overline{t}W

production cross-section is measured to be 880 ± 80 fb, compared to a reference theoretical prediction of 745 ± 50 (scale) ± 13 (2-loop approx.) ± 19 (PDF, α

_{s}

) fb. Differential cross-section measurements characterise this process in detail for the first time. Several particle-level observables are compared with a variety of theoretical predictions, which generally agree well with the normalised differential cross-section results. Additionally, the relative charge asymmetry of

t\overline{t}{W}^{+}

and

t\overline{t}{W}^{-}

is measured inclusively to be

{A}_{\textrm{C}}^{\textrm{rel}}

= 0.33 ± 0.05, in very good agreement with the theoretical prediction of 0.322 ± 0.003 (scale) ± 0.007 (PDF), as well as differentially.[graphic not available: see fulltext]

Note:

71 pages in total, author list starting page 54, 16 figures, 15 tables, published by JHEP. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TOPQ-2019-30

Hadron-Hadron Scattering
Top Physics
p p: colliding beams
top: pair production
W: associated production
p p: scattering
cross section: measured
charge: asymmetry: measured
channel cross section: measured
differential cross section: measured

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