Quantum effects to the Higgs boson self-couplings in the SM and in the MSSM

Abstract

We show that the effects of heavy Higgs particles and heavy top-squarks in the one-loop self-couplings of the lightest CP-even MSSM Higgs boson decouple from the low energy theory when the self-couplings are expressed in terms of the Higgs boson mass M_h0. Our conclusion is that the h^0 self-interactions become very close to those of the SM Higgs boson and, therefore, MSSM quantum effects could only be revealed by very high precision experiments.

LaTeX, 6 pages, 1 figure included. Talk given by S.P. at SUSY02, The 10th International Conference on Supersymmetry and Unification of Fundamental Interactions, DESY Hamburg, Germany, June 17-23, 2002. Version to appear in the Conference Proceedings