FCNC decays of the Higgs bosons in the BGL model

TL;DR

This paper investigates flavor-changing neutral current decays of Higgs bosons within the BGL model, analyzing parameter space, experimental constraints, and decay modes for both light and heavy Higgs states, updating previous results.

Contribution

It provides a detailed analysis of FCNC Higgs decays in the BGL model, including current experimental bounds and decay estimates for heavy Higgs bosons, extending prior studies.

Findings

FCNC decay branching ratios for heavy Higgses are below 30% around 350 GeV.

Parameter space consistent with experimental constraints is identified.

Current bounds on h-> mu tau are incorporated into the analysis.

Abstract

We consider flavor-changing decays of neutral Higgs bosons in the context of CP-conserving BGL model - a variant of 2HDM Type 3 model suggested by Branco, Grimus and Lavoura - in which tree-level FCNC couplings are suppressed by elements of known fermion mixing matrices. The relevant regions of parameter space compatible with experimental restrictions on the SM Higgs properties are studied. We also include current bounds on h-> mu tau into consideration. In addition, different FCNC decay modes are analyzed for heavier Higgs states (H/A) and conservative estimates for Br(A/H->mu tau) are provided. We updated previous studies and found that it can not be more than 30% for heavy Higgses with masses around 350 GeV.