Higgs mediated Flavour Violation in 2HDMs and the MSSM -- An Overview

TL;DR

This paper reviews the flavor phenomenology of two-Higgs-doublet models and their connection to the MSSM, focusing on flavor violation, experimental constraints, and two-loop corrections to Higgs couplings.

Contribution

It provides a comprehensive overview of flavor violation in 2HDMs, especially type III, and discusses the MSSM decoupling limit with detailed two-loop SQCD corrections.

Findings

FCNC constraints restrict 2HDM parameter space.

2HDM type III can explain deviations in tauonic B decays.

Two-loop SQCD corrections significantly affect Higgs-quark couplings.

Abstract

In these proceedings we review the flavour phenomenology of two-Higgs-doublet models (2HDMs) and connect the results to the decoupling limit of the MSSM. We first study the impact of FCNC constraints on the allowed parameter space of the 2HDM and examine how recent deviations from the SM expectations in tauonic $B$ decays (observed by BABAR) can be explained in a 2HDM with generic flavour structure (of type III) with sizable flavour violation in the up-sector. Afterwards, we discusses the matching of the MSSM on the 2HDM of type III. Here we focus on the two-loop SQCD corrections to the Higgs-quark-quark couplings.