Higgs boson decay to charm pair at full one-loop level in the MSSM with flavour violation

TL;DR

This paper investigates the decay of the lightest neutral Higgs boson into charm quark pairs within the MSSM framework, emphasizing the impact of quark flavor violation and the potential for observing these effects at the ILC.

Contribution

It provides a full one-loop level analysis of Higgs decay in the MSSM with non-minimal quark flavor violation, highlighting the sensitivity to QFV parameters.

Findings

Decay width is highly sensitive to QFV parameters.

Large $ ilde c - ilde t$ mixing significantly affects decay.

Observation of SUSY QFV effects is feasible at the ILC.

Abstract

We study the decay of the lightest neutral Higgs boson to a charm quark pair at full one-loop level in the MSSM with non-minimal quark flavour violation (QFV). In the numerical analysis we consider mixing between the second and the third squark generation and all relevant constraints from B meson data are taken into account. It is shown that the full one-loop corrected decay width can be quite sensitive to the MSSM QFV parameters due to large $\tilde c - \tilde t$ mixing and large trilinear couplings. After summarising the theoretical and experimental errors, we conclude that an observation of these SUSY QFV effects is possible at the ILC.