Search for short- and long-lived axion-like particles in H → aa → 4γ decays with the ATLAS experiment at the LHC
- NázevTitle
- Search for short- and long-lived axion-like particles in H → aa → 4γ decays with the ATLAS experiment at the LHCSearch for short- and long-lived axion-like particles in H → aa → 4γ decays with the ATLAS experiment at the LHC
- Druh výsledkuResult type
- Článek v časopiseJournal article
- AutořiAuthors
- G. Aad, B. Abbott, K. Abeling, N. J. Abicht, B. Ali, K. Augsten, B. Bergmann, H. Day-Hall, P. Fiedler, Z. Hubáček, P. Jačka, S. Mondal, M. Myška, L. Novotný, V. Petousis, R. Polifka, S. Pospíšil, K. Smolek, A. Sopczak, V. Vacek, P. Vokáč, O. Zaplatílek
- DOIDOI
- 10.1140/epjc/s10052-024-12979-0
- Časopis / citaceJournal / citation
- European Physical Journal C. 2024, 84(7), ISSN 1434-6044.
- RokYear
- 2024
- JazykLanguage
- eng
- WoSWoS
- 001394632700001
- ScopusScopus
- 2-s2.0-85200026299
- RIVRIV
- RIV/68407700:21220/24:00380896!RIV25-MSM-21220___
- ProjektProject
- CERN-CZ III - Výzkumná infrastruktura pro experimenty v CERN - LM2023040 (2023–2026)CERN-CZ III - Výzkumná infrastruktura pro experimenty v CERN - LM2023040 (2023–2026); Výzkum základních stavebních kamenů hmoty s využitím špičkových technologiíFundamental constituents of matter through frontier technologies
AbstraktAbstract
Presented is the search for anomalous Higgs boson decays into two axion-like particles (ALPs) using the full Run 2 data set of 140 fb(-1) of proton-proton collisions at a centre-of-mass energy of 13 TeV recorded by the ATLAS experiment. The ALPs are assumed to decay into two photons, providing sensitivity to recently proposed models that could explain the (g -2)(mu) discrepancy. This analysis covers an ALP mass range from 100 to 62 GeV and ALP-photon couplings in the range 10(-7) TeV-1 < C-a gamma gamma/Lambda < 1 TeV-1, and therefore includes signatures with significantly displaced vertices and highly collinear photons. No significant excess of events above the Standard Model background is observed. Upper limits at 95% confidence level are placed on the branching ratio of the Higgs boson to two ALPs in the four-photon final state, and are in the range of 10(-5) to 3x10(-2), depending on the hypothesized ALP mass and ALP-photon coupling strength.
Presented is the search for anomalous Higgs boson decays into two axion-like particles (ALPs) using the full Run 2 data set of 140 fb(-1) of proton-proton collisions at a centre-of-mass energy of 13 TeV recorded by the ATLAS experiment. The ALPs are assumed to decay into two photons, providing sensitivity to recently proposed models that could explain the (g -2)(mu) discrepancy. This analysis covers an ALP mass range from 100 to 62 GeV and ALP-photon couplings in the range 10(-7) TeV-1 < C-a gamma gamma/Lambda < 1 TeV-1, and therefore includes signatures with significantly displaced vertices and highly collinear photons. No significant excess of events above the Standard Model background is observed. Upper limits at 95% confidence level are placed on the branching ratio of the Higgs boson to two ALPs in the four-photon final state, and are in the range of 10(-5) to 3x10(-2), depending on the hypothesized ALP mass and ALP-photon coupling strength.