Inclusive and diferential cross-sections are measured at particle level for the associated production of a top quark pair and a photon (ttγ¯ ). The analysis is performed using an integrated luminosity of 140 fb−1 of proton-proton collisions at a centre-of-mass energy of 13 TeV collected by the ATLAS detector. The measurements are performed in the single-lepton and dilepton top quark pair decay channels focusing on ttγ¯ topologies where the photon is radiated from an initial-state parton or one of the top quarks. The absolute and normalised diferential cross-sections are measured for several variables characterising the photon, lepton and jet kinematics as well as the angular separation between those objects. The observables are found to be in good agreement with the Monte Carlo predictions. The photon transverse momentum diferential distribution is used to set limits on efective feld theory parameters related to the electroweak dipole moments of the top quark. The combined limits using the photon and the Z boson transverse momentum measured in tt¯ production in associations with a Z boson are also set.

Null, N., Aad, G., Aakvaag, E., Abbott, B., Abeling, K., Abicht, N.j., et al. (2024). Measurements of inclusive and differential cross-sections of $$ t\overline{t}\gamma $$ production in pp collisions at $$ \sqrt{s} $$ = 13 TeV with the ATLAS detector. JOURNAL OF HIGH ENERGY PHYSICS, 2024(10) [10.1007/jhep10(2024)191].

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

Aielli, G.;Camarri, P.;Cerrito, L.;De Sanctis, U.;Di Ciaccio, A.;
2024-01-01

Abstract

Inclusive and diferential cross-sections are measured at particle level for the associated production of a top quark pair and a photon (ttγ¯ ). The analysis is performed using an integrated luminosity of 140 fb−1 of proton-proton collisions at a centre-of-mass energy of 13 TeV collected by the ATLAS detector. The measurements are performed in the single-lepton and dilepton top quark pair decay channels focusing on ttγ¯ topologies where the photon is radiated from an initial-state parton or one of the top quarks. The absolute and normalised diferential cross-sections are measured for several variables characterising the photon, lepton and jet kinematics as well as the angular separation between those objects. The observables are found to be in good agreement with the Monte Carlo predictions. The photon transverse momentum diferential distribution is used to set limits on efective feld theory parameters related to the electroweak dipole moments of the top quark. The combined limits using the photon and the Z boson transverse momentum measured in tt¯ production in associations with a Z boson are also set.
2024
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore PHYS-01/A - Fisica sperimentale delle interazioni fondamentali e applicazioni
English
Con Impact Factor ISI
Hadron-Hadron Scattering
Null, N., Aad, G., Aakvaag, E., Abbott, B., Abeling, K., Abicht, N.j., et al. (2024). Measurements of inclusive and differential cross-sections of $$ t\overline{t}\gamma $$ production in pp collisions at $$ \sqrt{s} $$ = 13 TeV with the ATLAS detector. JOURNAL OF HIGH ENERGY PHYSICS, 2024(10) [10.1007/jhep10(2024)191].
Null, N; Aad, G; Aakvaag, E; Abbott, B; Abeling, K; Abicht, Nj; Abidi, Sh; Aboelela, M; Aboulhorma, A; Abramowicz, H; Abreu, H; Abulaiti, Y; Acharya, ...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/391729
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