$B_{s,d}^0 \to \ell^+\ell^-$ Decays in the Aligned Two-Higgs-Doublet Model

TL;DR

This paper provides a comprehensive one-loop analysis of rare $B_{s,d}^0 o au^+ au^-$ decays within the aligned two-Higgs-doublet model, exploring parameter effects and experimental constraints.

Contribution

It offers the first complete one-loop calculation of Wilson coefficients in the aligned two-Higgs-doublet model for these decays.

Findings

Calculated Wilson coefficients at one-loop level.

Identified parameter regions consistent with current data.

Compared results with previous approximations.

Abstract

The rare decays $B_{s,d}^0 \to \ell^+\ell^-$ are analyzed within the general framework of the aligned two-Higgs doublet model. We present a complete one-loop calculation of the relevant short-distance Wilson coefficients, giving a detailed technical summary of our results and comparing them with previous calculations performed in particular limits or approximations. We investigate the impact of various model parameters on the branching ratios and study the phenomenological constraints imposed by present data.