Two-Higgs-doublet models with Minimal Flavour Violation

TL;DR

This paper explores two-Higgs-doublet models with Minimal Flavour Violation, showing they can suppress flavor-changing neutral currents and explain recent anomalies in meson mixing and CP violation.

Contribution

It demonstrates that models with Minimal Flavour Violation and flavour-blind phases can remain stable under quantum corrections and account for observed flavor anomalies.

Findings

Suppression of tree-level flavor-changing neutral currents

Explanation of large CP-violating phase in B_s mixing

Resolution of tension between epsilon_K and S_psi_K

Abstract

The tree-level flavour-changing neutral currents in the two-Higgs-doublet models can be suppressed by protecting the breaking of either flavour or flavour-blind symmetries, but only the first choice, implemented by the application of the Minimal Flavour Violation hypothesis, is stable under quantum corrections. Moreover, a two-Higgs-doublet model with Minimal Flavour Violation enriched with flavour-blind phases can explain the anomalies recently found in the Delta F = 2 transitions, namely the large CP-violating phase in B_s mixing and the tension between epsilon_K and S_\psi_K.