The Higgs sector of the complex MSSM at two-loop order: QCD contributions

Details The Higgs sector of the complex MSSM at two-loop order: QCD contributions The Higgs sector of the complex MSSM at two-loop order: QCD contributions

2007-05-07

arxiv.org/abs/0705.0746v2

Phys.Lett.B652:300-309,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages, 7 figures; minor changes; published version

Scientific paper

10.1016/j.physletb.2007.07.030

Results are presented for the leading two-loop contributions of O(alpha_t alpha_s) to the masses and mixing effects in the Higgs sector of the MSSM with complex parameters. They are obtained in the Feynman-diagrammatic approach using on-shell renormalization. The full dependence on all complex phases is taken into account. The renormalization of the appropriate contributions of the Higgs-boson sector and the scalar top and bottom sector is discussed. Our numerical analysis for the lightest MSSM Higgs-boson mass is based on the new two-loop corrections, supplemented by the full one-loop result. The corrections induced by the phase variation in the scalar top sector are enhanced by the two-loop contributions. We find that the corresponding shift in M_h1 can amount to 5 GeV.

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