Szczegóły publikacji
Opis bibliograficzny
Inclusive and differential measurements of the $t\bar{t}\gamma$ cross section and the $t\bar{t}\gamma/t\bar{t}$ cross section ratio in proton-proton collisions at $\sqrt{s}$ = 13TeV / A. Hayrapetyan, [et al.], V. AVATI, L. FORTHOMME, L. GRZANKA, M. MALAWSKI, K. PIOTRZKOWSKI, [et al.] // The Journal of High Energy Physics [Dokument elektroniczny]. — Czasopismo elektroniczne ; ISSN 1029-8479 . — 2026 — iss. 4 art. no. 86, s. [1], 1–53. — Wymagania systemowe: Adobe Reader. — Bibliogr. s. 31–36, Abstr. — Publikacja dostępna online od: 2026-04-10
Autorzy (2425)
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 167933 |
|---|---|
| Data dodania do BaDAP | 2026-07-02 |
| Tekst źródłowy | URL |
| DOI | 10.1007/JHEP04(2026)086 |
| Rok publikacji | 2026 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | The Journal of High Energy Physics |
Abstract
Inclusive and differential cross section measurements of top quark pair (tt‾) production in association with a photon (γ) are performed as a function of lepton, photon, top quark, and tt‾ kinematic observables, using data from proton-proton collisions at √s = 13TeV, corresponding to an integrated luminosity of 138 fb−1, collected at the CERN LHC with the CMS detector. Events containing two leptons (electrons or muons) and a photon in the final state are considered. The fiducial cross section of \textrm{t}\overline{\textrm{t}}\upgamma is measured to be 137 ± 8 fb, in a phase space including events with a high momentum, isolated photon. The fiducial cross section of \textrm{t}\overline{\textrm{t}}\upgamma is also measured to be 56 ± 5 fb when considering only events where the photon is emitted in the production part of the process. Both measurements are in agreement with the theoretical predictions, of 126 ± 19 fb and 57 ± 5 fb, respectively. Differential measurements are performed at the particle and parton levels. Additionally, inclusive and differential ratios between the cross sections of \textrm{t}\overline{\textrm{t}}\upgamma and tt‾ production are measured. The inclusive ratio is found to be 0.0133 ± 0.0005, in agreement with the standard model prediction of 0.0127 ± 0.0008. The top quark charge asymmetry in \textrm{t}\overline{\textrm{t}}\upgamma production is also measured to be −0.012 ± 0.042, compatible with both the standard model prediction and with no asymmetry.
