Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-12-04
Phys.Lett.B672:65-70,2009
Physics
High Energy Physics
High Energy Physics - Phenomenology
Minor changes, version to appera in Phys. Lett. B
Scientific paper
10.1016/j.physletb.2008.12.055
It was observed recently by Randall and Wise that, any particle in the Standard Model cannot decay to $e^+e^-$ and $\gamma \gamma$ final states with comparably measurable branching ratios. This is also true for most extensions of the Standard Model, with the Randall-Sundrum model as an outstanding exception. In this paper, we show that two-Higgs-Doublet-Models (2HDM) yield another possible exception if certain parameters are properly chosen. In addition, we have checked that this model survives the tests of low energy processes, including the anomalous magnetic moment and electric dipole moment of leptons, lepton-flavor-violating decays $\mu^- \to e^- \gamma$ and $e^- e^+ e^-$.
Luo Ming-xing
Wang Liucheng
Zhu Guohuai
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