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Higgs boson decay into 2 photons in the type II Seesaw model

AuthorsArhrib, A.; Benbrik, Rachid ; Chabab, M.; Moultaka, G.; Rahili, L.
KeywordsHiggs physics
Beyond standard model
Issue Date2012
CitationJournal of High Energy Physics: 136 (2012)
AbstractWe study the two photon decay channel of the Standard Model-like component of the CP-even Higgs bosons present in the type II Seesaw Model. The corresponding cross-section is found to be significantly enhanced in parts of the parameter space, due to the (doubly-)charged Higgs bosons' (H ±±)H ± virtual contributions, while all the other Higgs decay channels remain Standard Model(SM)-like. In other parts of the parameter space H ±± (and H ±) interfere destructively, reducing the two photon branching ratio tremendously below the SM prediction. Such properties allow to account for any excess such as the one reported by ATLAS/CMS at ≈ 125 GeV if confirmed by future data; if not, for the fact that a SM-like Higgs exclusion in the diphoton channel around 114-115 GeV as reported by ATLAS, does not contradict a SM-like Higgs at LEP(!), and at any rate, for the fact that ATLAS/CMS exclusion limits put stringent lower bounds on the H ±± mass, particularly in the parameter space regions where the direct limits from same-sign leptonic decays of H ±± do not apply. © SISSA 2012.
DescriptionOpen Access: This article is distributed under the terms of the Creative Commons Attribution License.
Publisher version (URL)http://dx.doi.org/10.1007/JHEP04(2012)136
Identifiersdoi: 10.1007/JHEP04(2012)136
e-issn: 1029-8479
Appears in Collections:(IFCA) Artículos
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