Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/76249
Título: | 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 |
Autor(es): | Onofre, A. Castro, Nuno Filipe ATLAS Collaboration |
Data: | 2021 |
Editora: | Elsevier 1 |
Revista: | Physics Letters B |
Citação: | Aad, G., Abbott, B., Abbott, D. C., Abed Abud, A., Abeling, K., Abhayasinghe, D. K., . . . Zwalinski, L. (2021). Evidence for Higgs boson decays to a low-mass dilepton system and a photon in pp collisions at s=13 TeV with the ATLAS detector. Physics Letters B, 819, 136412. doi: https://doi.org/10.1016/j.physletb.2021.136412 |
Resumo(s): | A search for the Higgs boson decaying into a photon and a pair of electrons or muons with an invariant mass mℓℓ<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→ℓℓγ 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 μ=1.5±0.5. The Higgs boson production cross-section times the H→ℓℓγ branching ratio for mℓℓ<30 GeV is determined to be 8.7−2.7+2.8 fb. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/76249 |
DOI: | 10.1016/j.physletb.2021.136412 |
ISSN: | 0370-2693 |
Versão da editora: | https://www.sciencedirect.com/science/article/pii/S037026932100352X |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | LIP - Artigos/papers |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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1-s2.0-S037026932100352X-main.pdf | 1,79 MB | Adobe PDF | Ver/Abrir |
Este trabalho está licenciado sob uma Licença Creative Commons