Search for Low Mass Higgs Bosons produced in Z0 Decays

A searchfor light Higgs bosonswas performed using the data sample collected in 1990 by the DELPHIdetector at LEP, at centre of mass energies between 88.2 and 94.2 GeV. Using the process e+e−→H0+Z0*,Z0*→ff, it is possible to exclude the existence of the standard modelHiggs particle with a mass between 0 and 210 MeV/c2 at the 99% confidence level. Extending this analysis to the minimal supersymmetric standard modelrestricts the lightest neutral Higgs bosonto masses above 28 GeV/c2 irrespective of the value of the mixing angle.