The decay h0 → A0 → A0A0: a complete one-loop calculation in the MSSM Original Research Article

In the minimal supersymmetric standard model the decay h0 → A0A0 of the light neutral scalar h0 is kinematically allowed for low values of tan β when radiative corrections to the neutral Higgs masses are taken into account. The width of this decay mode is revisited on the basis of a complete one-loop diagrammatic calculation. We give the analytical expressions and numerical results and compare them with the corresponding ones from the simpler and compact approximations of the effective potential method and the renormalization group approach.