Eur. Phys. J. C 22, 521-534 (2001)
The Higgs boson sector of the complex MSSM in the Feynman-diagrammatic approachS. Heinemeyer
HET, Brookhaven Natl. Lab., Upton, NY 11973, USA
(Received: 6 August 2001 / Revised version: 8 October 2001 / Published online: 21 November 2001 - © Springer-Verlag / Società Italiana di Fisica 2001 )
In the Minimal Supersymmetric Standard Model with complex parameters (cMSSM) we calculate higher order corrections to the Higgs boson sector in the Feynman-diagrammatic approach using the on-shell renormalization scheme. The application of this approach to the cMSSM, being complementary to existing approaches, is analyzed in detail. Numerical examples for the leading fermionic corrections, including the leading two-loop effects, are presented. Numerical agreement within 10% with other approaches is found for small and moderate mixing in the scalar top sector. The leading fermionic corrections, supplemented by the full logarithmic one-loop and the leading two-loop contributions are implemented into the public Fortran code FeynHiggsFastC.
© Società Italiana di Fisica, Springer-Verlag 2001