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Self-interactions of the lightest MSSM Higgs boson in the large pseudoscalar-mass limit

Antonio Dobado·Maria J. Herrero·Wolfgang Hollik·Siannah Penaranda
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Abstract

We investigate the decoupling properties of the Higgs-sector-induced one-loop corrections in the lightest Higgs-boson self-couplings, in the framework of the Minimal Supersymmetric Standard Model (MSSM). The renormalized n-point vertex functions with external Higgs particles in the MSSM and in the SM are derived to the one-loop level and compared in the MA >> MZ limit. The computation has been done in a general R_{xi} gauge and the on-shell renormalization scheme is chosen. By a comparison of the renormalized lightest Higgs-boson h^0 vertex functions with respect to the corresponding SM ones, we find that the differences between the predictions of both models are summarized in the lightest Higgs-boson mass correction Delta Mh. Consequently, the radiative corrections are absorbed in the Higgs-boson mass, and the trilinear and quartic h^0 self-couplings acquire the same structure as the couplings of the SM Higgs-boson. Therefore, decoupling of the heavy MSSM Higgs bosons occurs and the MSSM h^0 self-interactions converge to the SM ones in the MA >> MZ limit.

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Antonio Dobado, Maria J. Herrero, Wolfgang Hollik, Siannah Penaranda. 2002-11-28. Self-interactions of the lightest MSSM Higgs boson in the large pseudoscalar-mass limit. https://doi.org/10.1103/physrevd.66.095016

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