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arXiv 1202.19732012-02hep-phhep-ex

Minimal violation of flavour and custodial symmetries in a vectophobic Two-Higgs-Doublet-Model

Elvira Cerveró, Jean-Marc Gérard

备注：: 13 pages, 3 figures, v2: constraints from B_s -> mu+mu- updated, references added, to appear in Phys.Lett. B
发表信息：: Physics Letters B 712 (2012), pp. 255-260
DOI：: 10.1016/j.physletb.2012.05.010

英文摘要：

Tree-level accidental symmetries are known to play a fundamental role in the phenomenology of the Standard Model (SM) for electroweak interactions. So far, no significant deviations from the theory have been observed in precision, flavour and collider physics. Consequently, these global symmetries are expected to remain quite efficient in any attempt beyond the SM. Yet, they do not forbid rather unorthodox phenomena within the reach of current LHC experiments. This is illustrated with a vectophobic Two-Higgs-Doublet-Model (2HDM) where effects of a light, flavour-violating and custodian (pseudo)scalar might be observed in the $B_s\toμ^+μ^-$ decay rate and in the diphoton invariant mass spectrum at around 125 GeV.

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