1302.0083 (J. Hernandez-Sanchez et al.)

Update of the 2HDM-III with a four-zero texture in the Yukawa matrices
and phenomenology of the charged Higgs Boson    [PDF]

J. Hernandez-Sanchez, S. Moretti, R. Noriega-Papaqui, A. Rosado

We update the flavor-violating constraints on the charged Higgs sector of the 2-Higgs Doublet Model Type-III (2HDM-III), using a four-zero texture in the Yukawa matrices. We give a generic Lagrangian of the 2HDM-III. In order to show the relevance of the off-diagonal terms of such a texture, we utilize the main constraints from $B$-physics, $\mu -e$ universality in $\tau$ decays and the radiative decay $Z\to b \bar{b}$ presented recently in arXiv:1212.6818 [hep-ph]. In particular, we show that the $H^- c \bar{b}$ coupling can be very large and very different with respect to 2HDMs with a flavor discrete symmetry (i.e., ${\mathcal{Z}}_2$). We also discuss the possible enhancements of the vertices $H^\pm W^\mp V$ ($V=Z, \gamma$) that arise at one-loop level.

View original: http://arxiv.org/abs/1302.0083