Evidence for Higgs boson decays to a low-mass dilepton system and a photon in pp collisions at root s=13 TeV with the ATLAS detector
- NázevTitle
- Evidence for Higgs boson decays to a low-mass dilepton system and a photon in pp collisions at root s=13 TeV with the ATLAS detectorEvidence for Higgs boson decays to a low-mass dilepton system and a photon in pp collisions at root s=13 TeV with the ATLAS detector
- Druh výsledkuResult type
- Článek v časopiseJournal article
- AutořiAuthors
- G. Aad, B. Abbott, D. C. Abbott, A. Abud, B. Ali, K. Augsten, B. Bergmann, T. Billoud, M. Havránek, Z. Hubáček, S. Mondal, M. Myška, L. Novotný, V. Petousis, S. Pospíšil, K. Smolek, A. Sopczak, V. Vacek, P. Vokáč, V. Vrba
- DOIDOI
- 10.1016/j.physletb.2021.136412
- Časopis / citaceJournal / citation
- Physics Letters B. 2021, 819(2021), ISSN 0370-2693.
- RokYear
- 2021
- JazykLanguage
- eng
- WoSWoS
- 000679259200033
- ScopusScopus
- 2-s2.0-85110648956
- RIVRIV
- RIV/68407700:21220/21:00355114!RIV22-MSM-21220___
- ProjektProject
- CERN-CZ II - Výzkumná infrastruktura pro experimenty v CERN - LM2018104 (2020–2022)CERN-CZ II - Výzkumná infrastruktura pro experimenty v CERN - LM2018104 (2020–2022); Centrum pokročilých aplikovaných přírodních vědCenter for advanced applied sciences; Získávání nových poznatků o mikrosvětě v infrastruktuře CERNAcquiring new pieces of knowledge about micro-world in CERN research infrastructure
AbstraktAbstract
A search for the Higgs boson decaying into a photon and a pair of electrons or muons with an invariant mass m(ll) < 30 GeV is presented. The analysis is performed using 139 fb(-1) of proton-proton collision data, produced by the LHC at a centre-of-mass energy of 13 TeV and collected by the ATLAS experiment. Evidence for the H -> ll(gamma) process is found with a significance of 3.2 over the background-only hypothesis, compared to an expected significance of 2.1 for the Standard Model prediction. The best-fit value of the signal-strength parameter, defined as the ratio of the observed signal yield to the one expected in the Standard Model, is mu = 1.5 +/- 0.5. The Higgs boson production cross-section times the H -> ll(gamma) branching ratio for m(ll) < 30 GeV is determined to be 8.7(-2.7)(+2.8) fb. (C) 2021 The Author. Published by Elsevier B.V.
A search for the Higgs boson decaying into a photon and a pair of electrons or muons with an invariant mass m(ll) < 30 GeV is presented. The analysis is performed using 139 fb(-1) of proton-proton collision data, produced by the LHC at a centre-of-mass energy of 13 TeV and collected by the ATLAS experiment. Evidence for the H -> ll(gamma) process is found with a significance of 3.2 over the background-only hypothesis, compared to an expected significance of 2.1 for the Standard Model prediction. The best-fit value of the signal-strength parameter, defined as the ratio of the observed signal yield to the one expected in the Standard Model, is mu = 1.5 +/- 0.5. The Higgs boson production cross-section times the H -> ll(gamma) branching ratio for m(ll) < 30 GeV is determined to be 8.7(-2.7)(+2.8) fb. (C) 2021 The Author. Published by Elsevier B.V.