Flavor Violating Higgs signals in the Texturized Two-Higgs Doublet Model (2HDM-Tx)

Abstract

Flavor violating Higgs signals, such as the top FCNC decay $t\to c{h}^0$ and the LFV Higgs decay $h^0\to \tau \mu$, have been studied at the LHC. These signals can arise within the general Two-Higgs doublet model (THDM), where each Higgs doublet couples to all fermions types through Yukawa matrices $Y_1^f$ and $Y_2^f$. The Yukawa matrices can be assumed to have the same form or they could have different structures. In this paper we study the case when both $Y_1^f$ and $Y_2^f$ have completely different forms, but in such a way that they complement to produce a specific hermitian mass matrix. We find that for specific four-zero textures, the Flavor Violating Higgs couplings depend only on the free parameters $\tan \beta$, ${\gamma }_f$ and the fermion masses. We use the current bounds on the low energy processes, to derive constraints on the Heavy Higgs boson mass, $\tan \beta$ and ${\gamma }_f$. Then, we use these constraints to evaluate the LFV Higgs decays, which reach Branching ratios that could be tested at the LHC.

arXiv commentVersion to be published in Chinese Physics C

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