ONE-LOOP RADIATIVE-CORRECTIONS TO THE LIGHTEST HIGGS SCALAR MASS IN THE NONMINIMAL SUPERSYMMETRIC STANDARD MODEL

We present a calculation of the one-loop radiative corrections to the mass squared matrix of the CP-even Higgs bosons in the non-minimal sup ersymmetric standard model containing two Higgs doublets and a Higgs s inglet chiral superfield in the effective potential approximation. We find that the radiative corrections to the upper and lower bounds of t he lightest Higgs boson are substantial and can push its mass beyond t he reach of LEP. An absolute upper bound on the mass of the radiativel y corrected lightest Higgs boson is also presented and compared with t he corresponding bound in the minimal supersymmetric standard model.