Radiative corrections to the masses of supersymmetric Higgs bosons

Abstract The lightest neutral Higgs boson in the minimal supersymmetric extension of the standard model has a tree-level mass less than that of the Z 0 . We calculate radiative corrections to its mass and to that of the heavier CP -even neutral Higgs boson. We find large corrections that increase with the top quark and squark masses, and vary with the ratio of vacuum expectation values ν 2 / ν 1 . These radiative corrections can be as large as O(100) GeV, and have the effect of (i) invalidating lower bounds on ν 2 / ν 1 inferred from unsuccessful Higgs searches at LEP I, (ii) in many cases, increasing the mass of the lighter CP -even Higgs boson beyond m z , (iii) often, increasing the mass of the heavier CP -even Higgs boson beyond the LEP reach, into a range more accessible to the LHC or SSC.

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