Flavor constraints on the Two Higgs Doublet Models of $Z_2$ symmetric and aligned types

TL;DR

This paper analyzes flavor observables from various meson decays to constrain Z2 symmetric and aligned Two Higgs Doublet Models, updating parameter bounds and discussing anomalies in muon g-2 and B decays.

Contribution

It provides a comprehensive flavor-based constraint analysis on 2HDMs, incorporating updated experimental data and CKM matrix re-fitting to isolate new Higgs contributions.

Findings

Constraints on 2HDM parameters from meson decay data

Re-fitting CKM matrix to account for Higgs contributions

Discussion of muon g-2 and B decay anomalies in 2HDMs

Abstract

We give a comprehensive study from flavor observables of pion, kaon, D_(s), and B_(s) mesons for limiting the Two Higgs Doublet Models (2HDMs) with natural flavor conservation, namely, Z_2 symmetric and aligned type of models. With use of the updated studies and analyses of B -> tau nu, D -> mu nu, D_s -> tau nu, D_s -> mu nu, K -> mu nu, Pi -> mu nu, B^0_s -> mu^+ mu^-, B^0_d -> mu^+ mu^-, tau -> K nu, tau -> Pi nu, B -> X_s gamma, K-K bar mixing, B^0_d-B^0_d bar mixing, and B^0_s-B^0_s bar mixing, we obtain constraints on the parameters in the 2HDMs. To calculate the constraints, we pay attention to a determination of CKM matrix elements and re-fit them to experimental data so that new contributions from additional Higgs bosons do not affect the determination. In addition, we discuss excesses of observables in the muon anomalous magnetic moment and the semi-tauonic B meson decays in the context of the 2HDM.