WHAT IS THE EXPERIMENTAL LOWER BOUND ON THE HIGGS BOSON MASS IN SUPERSYMMETRIC MODELS

In the minimal supersymmetric model with the ratio of the vacuum expectation values tan beta much greater than 1, the LEP lower bounds on the CP-even and CP-odd Higgs masses (m(h0) and m(A0)) have been obtained from the non-observation of the process Z --> h0A0. This bound is based on the tree-level assumption that m(ho) --> m(A0) in the limit tan beta --> infinity. In this letter we demonstrate that this assumption can be modified by large radiative corrections if squark mixing is non-negligible As a result, the lower bound on m(h0) set by the current LEP experiments has to be reduced significantly.