Measurement of the CP properties of Higgs boson interactions with τ-leptons with the ATLAS detector

0576808 - FZÚ 2024 RIV DE 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 2957 autorů
Measurement of the CP properties of Higgs boson interactions with τ-leptons with the ATLAS detector.
European Physical Journal C. Roč. 83, July (2023), č. článku 563. ISSN 1434-6044. E-ISSN 1434-6052
Výzkumná infrastruktura: CERN-CZ III - 90240
Institucionální podpora: RVO:68378271
Klíčová slova: Higgs particle: leptonic decay * tau: pair production * tau: decay modes
Obor OECD: Particles and field physics
Impakt faktor: 4.4, rok: 2022
Způsob publikování: Open access

A study of the charge conjugation and parity (CPCP) properties of the interaction between the Higgs boson and ττ-leptons is presented. The study is based on a measurement of CPCP-sensitive angular observables defined by the visible decay products of ττ-leptons produced in Higgs boson decays. The analysis uses 139 fb−1−1 of proton–proton collision data recorded at a centre-of-mass energy of s=13s ​=13 TeV with the ATLAS detector at the Large Hadron Collider. Contributions from CPCP-violating interactions between the Higgs boson and ττ-leptons are described by a single mixing angle parameter ϕτϕτ​ in the generalised Yukawa interaction. Without constraining the H→ττH→ττ signal strength to its expected value under the Standard Model hypothesis, the mixing angle ϕτϕτ​ is measured to be 9∘±16∘9∘±16∘, with an expected value of 0∘±28∘0∘±28∘ at the 68% confidence level.
Trvalý link: https://hdl.handle.net/11104/0346211