Decay widths of the neutral -even MSSM Higgs
in the Feynman-diagrammatic approach
1 DESY Theorie, Notkestrasse 85, 22603 Hamburg, Germany
2 Institut für Theoretische Physik, Universität Karlsruhe, 76128 Karlsruhe, Germany
3 CERN, TH Division, 1211 Geneva 23, Switzerland
Received: 9 March 2000 / Published online: 14 April 2000 - © Springer Verlag 2000
In the Minimal Supersymmetric Standard Model (MSSM) we incorporate the Higgs-boson propagator corrections, evaluated up to two-loop order, into the prediction of and for . The propagator corrections consist of the full one-loop contribution, including the effects of non-vanishing external momentum, and corrections of at the two-loop level. The results are supplemented with the dominant one-loop QED corrections and final state QCD corrections from both gluons and gluinos. The effects of the two-loop propagator corrections and of the one-loop gluino contributions are investigated in detail. Our results are compared with the result obtained within the renormalization group approach. Agreement within 10% is found for most parts of the MSSM parameter space.
Copyright Società Italiana di Fisica, Springer-Verlag 2000