QCD corrections to Higgs boson decays into squarks in the Minimal Supersymmetric Standard Model

Abstract

We calculate the supersymmetric QCD corrections in order ${\alpha }_s$ to the the widths of the Higgs boson decays $H^{+}\to \text{st}\overline{\text{sb}}$ and $H^0,A^0\to \text{st}\overline{\text{st}},\text{sb}\overline{\text{sb}}$ in the on--shell scheme within the Minimal Supersymmetric Standard Model. We find that the QCD corrections are significant, but that the squark pair decay modes are still dominant in a wide parameter region.

Comments: 16 pages latex with 2 figures included, few minor changes