Decay widths of the neutral CP-even MSSM Higgs bosons in the Feynman-diagrammatic approach

Details Decay widths of the neutral CP-even MSSM Higgs bosons in the Feynman-diagrammatic approach Decay widths of the neutral CP-even MSSM Higgs bosons in the Feynman-diagrammatic approach

2000-03-03

arxiv.org/abs/hep-ph/0003022v1

Eur.Phys.J.C16:139-153,2000

Physics

High Energy Physics

High Energy Physics - Phenomenology

25 pages, 12 figures

Scientific paper

10.1007/s100520050010

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 -> ff) and BR(h -> ff) 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 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.

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