Prof. Giuseppe Degrassi (Università di Roma Tre, INFN Roma Tre)
We present a calculation of the two-loop bottom-sbottom-gluino contributions to Higgs boson production via gluon fusion in the MSSM. The calculation is based on an asymptotic expansion in the masses of the supersymmetric particles, which are assumed to be much heavier than the bottom quark and the Higgs bosons. We obtain explicit analytic results that allow for a straightforward identification of the dominant contributions in the NLO bottom corrections. We emphasize the interplay between the calculations of the mass and the production cross section of the Higgs bosons, discussing sensible choices of renormalization scheme for the parameters in the bottom/sbottom sector.