Revisiting the flavor changing neutral current Higgs decays $H\to q_i q_j$ in the Standard Model

TL;DR

This paper provides an exact calculation of rare Higgs decays involving flavor changing neutral currents within the Standard Model, revealing extremely suppressed branching ratios based on current experimental data.

Contribution

It offers a precise computation of Higgs flavor changing neutral current decays using the latest data, updating previous estimates with exact methods.

Findings

Branching ratios are around 10^{-7} for H→b s and H→b d decays.

Branching ratios are about 10^{-8} for H→s d and H→c u decays.

Branching ratios are approximately 10^{-15} for H→c u decays.

Abstract

An exact calculation of the Higgs boson decays $H\to q_i q_j$ mediated by flavor changing neutral currents is presented in the context of the Standard Model. Using up-to-date experimental data, branching ratios of the order of $10^{-7}$, $10^{-8}$, $10^{-8}$, and $10^{-15}$ are found for the $\bar{b}s+\bar{s}b$, $\bar{b}d+\bar{d}b$, $\bar{s}d+\bar{d}s$, and $\bar{c}u+\bar{u}c$ decay modes, respectively.