On the radiative corrections to the pseudo-scalar Higgs boson mass

We reexamine the one-loop corrections to the mass of the pseudo-scalar Higgs boson, using the effective potential. In the absence of the chargino and neutralino contributions its mass exhibits a large scale dependence in the large M1/2 regime, especially for values of tanβ>20. Thus, although of electroweak origin, the heaviness of the M1/2, in conjunction with the largeness of tanβ, makes these corrections very important for establishing a scale independent result and an unambiguous determination of the pseudo-scalar mass in this region of the parameter space.