Search for the decay of the Higgs boson to a pair of light pseudoscalar bosons in the final state with four bottom quarks in proton-proton collisions at √s=13TeV
A search is presented for the decay of the 125GeV Higgs boson (H) to a pair of new light pseudoscalar bosons (a), followed by the prompt decay of each a boson to a bottom quark-antiquark pair, H → aa → bbbb. The analysis is performed using a data sample of proton-proton collisions collected with the...
| Autores: | , , , |
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| Formato: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2024 |
| País: | Brasil |
| Recursos: | Universidade Federal do Rio Grande do Sul (UFRGS) |
| Repositorio: | Repositório Institucional da UFRGS |
| Idioma: | inglés |
| OAI Identifier: | oai:www.lume.ufrgs.br:10183/291886 |
| Acesso em linha: | http://hdl.handle.net/10183/291886 |
| Access Level: | acceso abierto |
| Palavra-chave: | Aceleradores de partículas Colisões proton-proton Supersimetrias Beyond standard model Hadron-hadron scattering Supersymmetry |
| Resumo: | A search is presented for the decay of the 125GeV Higgs boson (H) to a pair of new light pseudoscalar bosons (a), followed by the prompt decay of each a boson to a bottom quark-antiquark pair, H → aa → bbbb. The analysis is performed using a data sample of proton-proton collisions collected with the CMS detector at a center-of-mass energy of 13TeV, corresponding to an integrated luminosity of 138fb−1. To reduce the background from standard model processes, the search requires the Higgs boson to be produced in association with a leptonically decaying W or Z boson. The analysis probes the production of new light bosons in a 15 < ma < 60GeV mass range. Assuming the standard model predictions for the Higgs boson production cross sections for pp → WH and ZH, model independent upper limits at 95% confidence level are derived for the branching fraction B(H → aa → bbbb). The combined WH and ZH observed upper limit on the branching fraction ranges from 1.10 for ma = 20GeV to 0.36 for ma = 60GeV, complementing other measurements in the µµττ, ττττ and bbℓℓ (ℓ = µ,τ) channels. |
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