EPJ

2021 Impact factor 4.991
EPJ C - Particles and Fields
Particles and Fields
Eur. Phys. J. C 16, 139-153
DOI 10.1007/s100520000404

Decay widths of the neutral ${\cal CP}$-even MSSM Higgs bosons
in the Feynman-diagrammatic approach

S. Heinemeyer1 - W. Hollik2 - G. Weiglein3

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

Abstract
In the Minimal Supersymmetric Standard Model (MSSM) we incorporate the Higgs-boson propagator corrections, evaluated up to two-loop order, into the prediction of $\Gamma(h \to f\bar{f})$ and $BR(h \to f\bar{f})$ for $f = b, c, \tau$. The propagator corrections consist of the full one-loop contribution, including the effects of non-vanishing external momentum, and corrections of ${\cal O}(\alpha\alpha_s)$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

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