Implication of Higgs mediated Flavour Changing Neutral Currents with Minimal Flavour Violation

TL;DR

This paper explores two Higgs doublet models with naturally suppressed flavor-changing neutral currents, highlighting their potential to produce new scalars detectable at the LHC and their testability due to reduced parameters.

Contribution

It demonstrates that these models, with symmetry-based suppression of FCNCs, can predict new scalars accessible at collider experiments, offering a testable extension of the Standard Model.

Findings

Models allow for new scalars with masses reachable at the LHC

Symmetry reduces free parameters, enabling precise predictions

Models can be experimentally validated or excluded

Abstract

We analise phenomenological implications of two Higgs doublet models with Higgs flavour changing neutral currents suppressed in the quark sector by small entries of the Cabibbo-Kokayashi-Maskawa matrix. This suppression occurs in a natural way since it is the result of a symmetry applied to the Lagrangian. These type of models were proposed some time ago by Branco Grimus and Lavoura. Our results clearly show that these class of models allow for new physical scalars, with masses which are reachable at the LHC. The imposed symmetry severely reduces the number of free parameters and allows for predictions. Therefore these models can eventually be proved right or eliminated experimentally.