95.4 GeV diphoton excess at ATLAS and CMS
The ATLAS Collaboration has recently reported the results of a low-mass Higgs-boson search in the diphoton final state based on the full Run 2 dataset. The results are based on an improved analysis with respect to the previous analysis, which included a part of the Run 2 data, with a substantially b...
| Autores: | , , |
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| Tipo de documento: | artigo |
| Estado: | Versão publicada |
| Data de publicação: | 2024 |
| País: | España |
| Recursos: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositório: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/382065 |
| Acesso em linha: | http://hdl.handle.net/10261/382065 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85184931153&doi=10.1103%2fPhysRevD.109.035005&partnerID=40&md5=e6b7de2b05693f223056f9ea4a8e6005 |
| Access Level: | Acceso aberto |
| Palavra-chave: | Extensions of Higgs sector Particle dark matter Particle detection signatures Particle phenomena Phenomenology |
| Resumo: | The ATLAS Collaboration has recently reported the results of a low-mass Higgs-boson search in the diphoton final state based on the full Run 2 dataset. The results are based on an improved analysis with respect to the previous analysis, which included a part of the Run 2 data, with a substantially better sensitivity. The "model-dependent"search carried out by ATLAS shows an excess of events at a mass of about 95.4 GeV with a local significance of 1.7σ. The results are compatible with a previously reported excess at the same mass, but with somewhat higher significance of 2.9σ, from the CMS collaboration, also based on the full Run 2 dataset. Combining the two results (neglecting possible correlations), we find a signal strength of μγγATLAS+CMS=0.24-0.08+0.09, corresponding to an excess of 3.1σ. In this work, we investigate the implications of this result, updating a previous analysis based solely on the CMS Run 2 data. We demonstrate that the ATLAS/CMS combined diphoton excess can be interpreted as the lightest Higgs boson in a Two-Higgs doublet model that is extended by a complex singlet (S2HDM) of Yukawa types II and IV, while being in agreement with all other experimental and theoretical constraints. © 2024 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3. |
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