The $\mu\to e\gamma$ and $\tau\to \mu\gamma$ decays in the general two Higgs Doublet model with the inclusion of one universal extra dimension

Abstract

We study the effect of one universal extra dimension on the branching ratios of the lepton flavor violating processes \mu\to e\gamma and \tau\to \mu\gamma in the general two Higgs doublet model. We observe that these new effects are tiny for the small values of the compactification radius R. Furthermore, we see that these effects are comparable with the branching ratio obtained without including extra dimension, if the neutral Higgs bosons are nearly degenerate and the complexity of the Yukawa coupling, inducing the vertex tau-tau-$h^0 (A^0)$, is large.