Szczegóły publikacji
Opis bibliograficzny
Probing the CP nature of the top–Higgs Yukawa coupling in $t\bar{t} H$ and $tH$ events with $H \to b \bar{b}$ decays using the ATLAS detector at the LHC / G. Aad, [et al.], L. ADAMCZYK, [et al.], T. BOŁD, [et al.], K. M. CIEŚLA, [et al.], W. DĄBROWSKI, [et al.], M. DYNDAŁ, [et al.], A. K. GILBERT, [et al.], I. GRABOWSKA-BOŁD, [et al.], K. W. JANAS, [et al.], S. KOPERNY, [et al.], I. K. ŁAKOMIEC, [et al.], K. MAJ, [et al.], B. MINDUR, [et al.], A. OGRODNIK, [et al.], M. PRZYBYCIEŃ, [et al.], R. SIKORA, [et al.] // Physics Letters. B ; ISSN 0370-2693. — 2024 — vol. 849 art. no. 138469, s. 1–25. — Bibliogr. s. 9–11, Abstr. — Publikacja dostępna online od: 2024-01-18
Autorzy (2902)
Dane bibliometryczne
ID BaDAP | 152447 |
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Data dodania do BaDAP | 2024-04-03 |
Tekst źródłowy | URL |
DOI | 10.1016/j.physletb.2024.138469 |
Rok publikacji | 2024 |
Typ publikacji | artykuł w czasopiśmie |
Otwarty dostęp | |
Creative Commons | |
Czasopismo/seria | Physics Letters, B |
Abstract
The CP properties of the coupling between the Higgs boson and the top quark are investigated using 139 fb−1 of proton–proton collision data recorded by the ATLAS experiment at the LHC at a centre-of-mass energy of s=13 TeV. The CP structure of the top quark–Higgs boson Yukawa coupling is probed in events with a Higgs boson decaying into a pair of b-quarks and produced in association with either a pair of top quarks, tt¯H, or a single top quark, tH. Events containing one or two electrons or muons are used for the measurement. Multivariate techniques are used to select regions enriched in tt¯H and tH events, where dedicated CP-sensitive observables are exploited. In an extension of the Standard Model (SM) with a CP-odd admixture in the top–Higgs Yukawa coupling, the mixing angle between CP-even and CP-odd couplings is measured to be α=11−73∘+52, compatible with the SM prediction corresponding to α=0.