Global fit to the 2HDM with generic sources of flavour violation using \textsf{GAMBIT}

TL;DR

This paper conducts a comprehensive global analysis of the two-Higgs-doublet model with generic flavour violation sources, addressing B anomalies and predicting future observable signatures in collider and flavour experiments.

Contribution

It provides the first global fit of the 2HDM with generic flavour violation using GAMBIT, explaining B anomalies and making testable predictions for future experiments.

Findings

Simultaneously explains charged and neutral B anomalies.

Identifies parameter regions compatible with current constraints.

Predicts observable signals for future collider and flavour experiments.

Abstract

We perform a global statistical analysis of the two-Higgs-doublet model with generic sources of flavour violation using \textsf{GAMBIT}. This is particularly interesting in light of deviations from the Standard Model predictions observed in $b\to c\tau\bar \nu$ and $b\to s\ell^+\ell^-$ transitions as well as the indications for a charged Higgs with a mass of 130\,GeV in top quark decays. Including all relevant constraints from precision, flavour and collider observables, we find that it is possible to simultaneously explain both the charged and neutral current $B$ anomalies. We study the impact of using different values for the $W$ mass and the Standard Model prediction for $g-2$ of the muon and provide predictions for observables that can probe our model in the future such as lepton flavour violation searches at Belle II and Higgs coupling strength measurements at the high-luminosity LHC.