期刊
JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 4, 页码 -出版社
SPRINGER
DOI: 10.1007/JHEP04(2012)136
关键词
Higgs Physics; Beyond Standard Model
资金
- Programme Hubert Curien, Volubilis, AI [MA/08/186]
We 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 approximate to 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.
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