Regular Article – Theoretical Physics
Refinements of the bottom and strange MSSM Higgs Yukawa couplings at NNLO
Institut für Theoretische Physik, Eberhard Karls, Universität Tübingen, 72076, Tübingen, Germany
2 Institute for Theoretical Physics, Karlsruhe Institute of Technology, 76131, Karlsruhe, Germany
3 Institute for Nuclear Physics, Karlsruhe Institute of Technology, 76344, Karlsruhe, Germany
4 Institut für Theoretische Physik, Zurich University, CH–8057, Zurich, Switzerland
5 Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, 79104, Freiburg, Germany
6 Paul Scherrer Institut, CH–5232, Villigen PSI, Switzerland
Accepted: 8 March 2021
Published online: 25 March 2021
We extend the already existing two-loop calculation of the effective bottom-Yukawa coupling in the MSSM. In addition to the resummation of the dominant corrections for large values of tg, we include the subleading terms related to the trilinear Higgs coupling and contributions induced by the electroweak gauge couplings. This calculation has been extended to the NNLO corrections to the MSSM strange-Yukawa coupling. Our analysis leads to residual theoretical uncertainties of the effective Yukawa couplings at the per-cent level.
© The Author(s) 2021
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