Improved SUSY QCD corrections to Higgs boson decays into quarks and   squarks
  The O(alpha_s) SUSY QCD corrections to the decays of the MSSM Higgs bosons into bottom quarks and squarks can be very large for large tan beta in the on--shell renormalization scheme. We improve the calculation by a careful choice of the tree-level Higgs boson couplings in terms of running parameters of quarks and squarks. 
Y. Yamada, H. Eberl, K. Hidaka, S. Kraml, W. Majerotto