Test of CP invariance in Higgs boson vector-boson-fusion production using the H→γγ channel with the ATLAS detector

0578280 - FZÚ 2024 RIV US eng J - Článek v odborném periodiku
Aad, G. - Abbott, B. - Abbott, D.C. - Chudoba, Jiří - Federičová, Pavla - Hejbal, Jiří - Jačka, Petr - Kepka, Oldřich - Kroll, Jiří - Kupčo, Alexander - Latoňová, Věra - Lokajíček, Miloš - Lysák, Roman - Marčišovský, Michal - Mikeštíková, Marcela - Němeček, Stanislav - Šícho, Petr - Staroba, Pavel - Svatoš, Michal - Taševský, Marek … celkem 2927 autorů
Test of CP invariance in Higgs boson vector-boson-fusion production using the H→γγ channel with the ATLAS detector.
Physical Review Letters. Roč. 131, č. 6 (2023), č. článku 061802. ISSN 0031-9007. E-ISSN 1079-7114
Výzkumná infrastruktura: CERN-CZ III - 90240
Institucionální podpora: RVO:68378271
Klíčová slova: invariance: CP * Higgs particle: coupling * vector boson: fusion
Obor OECD: Particles and field physics
Impakt faktor: 8.6, rok: 2022
Způsob publikování: Open access

A test of CP invariance in Higgs boson production via vector-boson fusion has been performed in the H→γγ channel using 139  fb-1 of proton-proton collision data at s=13  TeV collected by the ATLAS detector at the LHC. The optimal observable method is used to probe the CP structure of interactions between the Higgs boson and electroweak gauge bosons, as described by an effective field theory. No sign of CP violation is observed in the data. Constraints are set on the parameters describing the strength of the CP-odd component in the coupling between the Higgs boson and the electroweak gauge bosons in two effective field theory bases: d˜ in the HISZ basis and cHW˜ in the Warsaw basis. The results presented are the most stringent constraints on CP violation in the coupling between Higgs and weak bosons. The 95% C.L. constraint on d˜ is derived for the first time and the 95% C.L. constraint on cHW˜ has been improved by a factor of 5 compared to the previous measurement.
Trvalý link: https://hdl.handle.net/11104/0347300