A measurement of the charge asymmetry in top-quark pair ($t\bar{t}$)production in association with a photon is presented. The measurement isperformed in the single-lepton $t\bar{t}$ decay channel using proton-protoncollision data collected with the ATLAS detector at the Large Hadron Colliderat CERN at a centre-of-mass-energy of 13 TeV during the years 2015-2018,corresponding to an integrated luminosity of 139 fb$^{-1}$. The chargeasymmetry is obtained from the distribution of the difference of the absoluterapidities of the top quark and antiquark using a profile likelihood unfoldingapproach. It is measured to be $A_\text{C}=-0.003 \pm 0.029$ in agreement withthe Standard Model expectation.

Measurement of the charge asymmetry in top-quark pair production in association with a photon with the ATLAS experiment

Capua, M;Mastroberardino, A;Meoni, E;Schioppa, M;Tassi, E;
2022-01-01

Abstract

A measurement of the charge asymmetry in top-quark pair ($t\bar{t}$)production in association with a photon is presented. The measurement isperformed in the single-lepton $t\bar{t}$ decay channel using proton-protoncollision data collected with the ATLAS detector at the Large Hadron Colliderat CERN at a centre-of-mass-energy of 13 TeV during the years 2015-2018,corresponding to an integrated luminosity of 139 fb$^{-1}$. The chargeasymmetry is obtained from the distribution of the difference of the absoluterapidities of the top quark and antiquark using a profile likelihood unfoldingapproach. It is measured to be $A_\text{C}=-0.003 \pm 0.029$ in agreement withthe Standard Model expectation.
2022
High Energy Physics - Experiment
High Energy Physics - Experiment
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11770/361200
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 1
  • ???jsp.display-item.citation.isi??? ND
social impact