Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1999-03-27
Acta Phys.Polon.B30:1985-1997,1999
Physics
High Energy Physics
High Energy Physics - Phenomenology
14 pages, 5 figures, presented at the Cracow Epiphany Conference on Electron-Positron Colliders, Cracow, January 5-10, 1999, t
Scientific paper
The masses of the neutral CP-even Higgs bosons in the Minimal Supersymmetric Standard Model (MSSM) are predicted on the basis of explicit Feynman-diagrammatic calculations. The results, containing the complete diagrammatic one-loop corrections, the leading two-loop corrections of O(alpha alpha_s) and further improvements taking into account leading electroweak two-loop and higher-order QCD contributions, are discussed and compared with results obtained by renormalization group calculations. Good agreement is found in the case of vanishing mixing in the scalar top sector, while sizable deviations occur if scalar top mixing is taken into account. By means of a Taylor expansion a compact approximation formula for the mass of the lightest Higgs boson, m_h, is derived. The quality of the approximation in comparison with the full result is analyzed.
Heinemeyer Sven
Hollik Wolfgang
Weiglein Georg
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