Evidence for the charge asymmetry in pp → t(t)over-bar production at √s=13 TeV with the ATLAS detector

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F23%3A73621643" target="_blank" >RIV/61989592:15310/23:73621643 - isvavai.cz</a>

Result on the web

<a href="https://link.springer.com/article/10.1007/JHEP08(2023)077" target="_blank" >https://link.springer.com/article/10.1007/JHEP08(2023)077</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/JHEP08(2023)077" target="_blank" >10.1007/JHEP08(2023)077</a>

Result language

angličtina

Original language name

Evidence for the charge asymmetry in pp → t(t)over-bar production at √s=13 TeV with the ATLAS detector

Original language description

Inclusive and differential measurements of the top-antitop ( t (t) over bar) charge asymmetry A(C)(t (t) over bar) and the leptonic asymmetry A(C)(l (l) over bar) are presented in proton-proton collisions at root s = 13 TeV recorded by the ATLAS experiment at the CERN Large Hadron Collider. The measurement uses the complete Run 2 dataset, corresponding to an integrated luminosity of 139 fb(-1), combines data in the single-lepton and dilepton channels, and employs reconstruction techniques adapted to both the resolved and boosted topologies. A Bayesian unfolding procedure is performed to correct for detector resolution and acceptance effects. The combined inclusive t (t) over bar charge asymmetry is measured to be A(C)(t (t) over bar) = 0.0068 +/- 0.0015, which differs from zero by 4.7 standard deviations. Differential measurements are performed as a function of the invariant mass, transverse momentum and longitudinal boost of the t (t) over bar system. Both the inclusive and differential measurements are found to be compatible with the Standard Model predictions, at next-to-next-to-leading order in quantum chromodynamics perturbation theory with next-to-leading-order electroweak corrections. The measurements are interpreted in the framework of the Standard Model effective field theory, placing competitive bounds on several Wilson coefficients.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10303 - Particles and field physics

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2023

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

JOURNAL OF HIGH ENERGY PHYSICS

ISSN

1029-8479

e-ISSN

—

Volume of the periodical

2023

Issue of the periodical within the volume

8

Country of publishing house

IT - ITALY

Number of pages

89

Pages from-to

"077-1"-"077-89"

UT code for WoS article

001062398000001

EID of the result in the Scopus database

2-s2.0-85169322582