Eur. Phys. J. C 28, 133-143 (2003)
DOI: 10.1140/epjc/s2003-01152-2

Towards high-precision predictions for the MSSM Higgs sector

G. Degrassi¹, S. Heinemeyer², W. Hollik³, P. Slavich^{3, 4} and G. Weiglein<sup>5

1</sup>  Dipartimento di Fisica, Università di Roma III and INFN, Sezione di Roma III, Via della Vasca Navale 84, 00146 Rome, Italy
²  Institut für Theoretische Elementarteilchenphysik, LMU München, Theresienstr. 37, 80333 Munich, Germany
³  Max-Planck-Institut für Physik (Werner-Heisenberg-Institut), Föhringer Ring 6, 80805 Munich, Germany
⁴  Institut für Theoretische Physik, Universität Karlsruhe, Kaiserstrasse 12, Physikhochhaus, 76128 Karlsruhe, Germany
⁵  Institute for Particle Physics Phenomenology, University of Durham, Durham DH1 3LE, UK

(Received: 12 December 2002 / Published online: 3 March 2003 )

Abstract
The status of the evaluation of the MSSM Higgs sector is reviewed. The phenomenological impact of recently obtained corrections is discussed. In particular it is shown that the upper bound on m_h within the MSSM is shifted upwards. Consequently, lower limits on obtained by confronting the upper bound as function of with the lower bound on m_h from Higgs searches are significantly weakened. Furthermore, the region in the M_A- -plane where the coupling of the lightest Higgs boson to down-type fermions is suppressed is modified. The presently not calculated higher-order corrections to the Higgs-boson mass matrix are estimated to shift the mass of the lightest Higgs boson by up to 3 GeV.

© Società Italiana di Fisica, Springer-Verlag 2003