Evidence for the charge asymmetry in pp -> tt(bar) production at CMS = 13 TeV with the ATLAS detector

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F23%3A10476323" target="_blank" >RIV/00216208:11320/23:10476323 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=q.OXpCtbbH" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=q.OXpCtbbH</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 -> tt(bar) production at CMS = 13 TeV with the ATLAS detector
Original language description
Inclusive and differential measurements of the top-antitop (t-t) charge asymmetryAt-tC and the leptonic asymmetry A'-'C are presented in proton-proton collisions atps = 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 luminosityof 139 fb-1, combines data in the single-lepton and dilepton channels, and employsreconstruction techniques adapted to both the resolved and boosted topologies. A Bayesianunfolding procedure is performed to correct for detector resolution and acceptance effects.The combined inclusive t-t charge asymmetry is measured to be At-tC = 0.0068 +- 0.0015,which differs from zero by 4.7 standard deviations. Differential measurements are performedas a function of the invariant mass, transverse momentum and longitudinal boostof the t-t system. Both the inclusive and differential measurements are found to be compatiblewith the Standard Model predictions, at next-to-next-to-leading order in quantumchromodynamics perturbation theory with next-to-leading-order electroweak corrections.The measurements are interpreted in the framework of the Standard Model effective fieldtheory, placing competitive bounds on several Wilson coefficients.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10300 - Physical sciences

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

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