Implications of Yukawa texture in the charged Higgs boson phenomenology within 2HDM-III

Abstract

We discuss the implications of assuming a four-zero Yukawa texture for the properties of the charged Higgs boson within the context of the general 2-Higgs Doublet Model of Type III. We present the charged Higgs boson couplings with heavy quarks and the resulting pattern for its decays, including the decay $H^{+}\to W^{+}\gamma$ at 1-loop level. The parameters chosen can still avoid the $B\to X_s\gamma$ constraint, the perturbativity and ${\rho }_0$ bound. Also, we present the constraints of $B0-\bar{B}0$ mixing and of the radiative corrections to the $Zb\bar{b}$ vertex in the regime small $\tan \beta$. The production of charged Higgs bosons is also sensitive to the modifications of its couplings, so that we also evaluate the resulting effects on `direct' $c\bar{b}\to H^{+}+c.c.$ and `indirect' $q\bar{q},gg\to \bar{t}b{H}^{+}+c.c.$ production. Significant scope exists at the Large Hadron Collider for several $H^{\pm }$ production and decay channels combined to enable one to distinguish between such a model and alternative 2-Higgs doublet scenarios.

Comments: 6 pages, 1 figure, work presented in Third International Workshop on Prospects for Charged Higgs Discovery at Colliders - CHARGED2010, September 27-30, 2010. Uppsala Sweden