Rachid Benbrik
Speaker affiliation: 
Cadi Ayyad University, Faculty Polydisciplinaire Safi
Friday, January 22, 2016 - 13:00
Seminar Room
Flavor Changing couplings of a Higgs-like boson in 2HDM
Inspired by a significance of $2.4\sigma$ for the $h\to \mu \tau$ decay observed by the CMS experiment at $\sqrt{s} = 8$ TeV, we investigate the Higgs lepton-flavor-violating effects in a generic two-Higgs-doublet model (2HDM), where the lepton-flavor-changing neutral currents are induced at the tree level and arise from Yukawa sector. To understand the influence of all involving free parameters and to realize their correlations, we employ $\chi$-square fitting approach by including theoretical and experimental constraints. The bounds from Higgs data play the major limits. With parameter values that simultaneously satisfy the Higgs bounds and the CMS excess of the Higgs coupling to $\mu$-$\tau$, we find that the tree-level $\tau\to 3\mu$ and the loop-induced $\tau\to \mu \gamma$ decays are consistent with current experimental upper limits; the discrepancy in muon $g-2$ between experimental results and standard model predictions can be resolved, and an interesting relation between muon $g-2$ and the branching ratio (BR) for $\mu\to e \gamma$ is found.