Searches for additional Higgs bosons and for vector leptoquarks in τ τ final states in proton-proton collisions at √s = 13 TeV
Three searches are presented for signatures of physics beyond the standard model (SM) in τ τ final states in proton-proton collisions at the LHC, using a data sample collected with the CMS detector at √ s = 13 TeV, corresponding to an integrated luminosity of 138 fb−1 . Upper limits at 95% confidenc...
| Autores: | , , , |
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| Formato: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2023 |
| 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:10183/270366 |
| Acesso em linha: | http://hdl.handle.net/10183/270366 |
| Access Level: | acceso abierto |
| Palavra-chave: | Aceleradores de partículas Bosons de higgs Colisões proton-proton Beyond Standard Model Hadron-Hadron scattering Higgs Physics |
| Resumo: | Three searches are presented for signatures of physics beyond the standard model (SM) in τ τ final states in proton-proton collisions at the LHC, using a data sample collected with the CMS detector at √ s = 13 TeV, corresponding to an integrated luminosity of 138 fb−1 . Upper limits at 95% confidence level (CL) are set on the products of the branching fraction for the decay into τ leptons and the cross sections for the production of a new boson φ, in addition to the H(125) boson, via gluon fusion (ggφ) or in association with b quarks, ranging from O(10 pb) for a mass of 60 GeV to 0.3 fb for a mass of 3.5 TeV each. The data reveal two excesses for ggφ production with local p-values equivalent to about three standard deviations at mφ = 0.1 and 1.2 TeV. In a search for t-channel exchange of a vector leptoquark U1 , 95% CL upper limits are set on the dimensionless U1 leptoquark coupling to quarks and τ leptons ranging from 1 for a mass of 1 TeV to 6 for a mass of 5 TeV, depending on the scenario. In the interpretations of the M125 h and M125 h,EFT minimal supersymmetric SM benchmark scenarios, additional Higgs bosons with masses below 350 GeV are excluded at 95% CL. |
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