Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.21/1831
Título: Implications of the LHC two-photon signal for two-Higgs-doublet models
Autor: Ferreira, P. M.
Santos, Rui
Sher, Marc
Silva, João P.
Palavras-chave: Neutral Higgs Bosons
Data: 20-Abr-2012
Editora: Amer Physical Soc
Citação: Ferreira P M, Santos R, Sher M, Silva J P. Implications of the LHC two-photon signal for two-Higgs-doublet models. Physical Review D. 2012; 7 (85).
Relatório da Série N.º: ;077703
Resumo: We study the implications for two-Higgs-doublet models of the recent announcement at the LHC giving a tantalizing hint for a Higgs boson of mass 125 GeV decaying into two photons. We require that the experimental result be within a factor of 2 of the theoretical standard model prediction, and analyze the type I and type II models as well as the lepton-specific and flipped models, subject to this requirement. It is assumed that there is no new physics other than two Higgs doublets. In all of the models, we display the allowed region of parameter space taking the recent LHC announcement at face value, and we analyze the W+W-, ZZ, (b) over barb, and tau(+)tau(-) expectations in these allowed regions. Throughout the entire range of parameter space allowed by the gamma gamma constraint, the numbers of events for Higgs decays into WW, ZZ, and b (b) over bar are not changed from the standard model by more than a factor of 2. In contrast, in the lepton-specific model, decays to tau(+)tau(-) are very sensitive across the entire gamma gamma-allowed region.
Peer review: yes
URI: http://hdl.handle.net/10400.21/1831
ISSN: 1550-7998
Aparece nas colecções:ISEL - Física - Artigos

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