THE LOWER-BOUND ON THE LIGHTER SCALAR HIGGS-BOSON MASS IN THE MINIMALSUPERSYMMETRIC STANDARD MODEL AT LEP-2

The mass of the lighter scalar Higgs boson in the minimal supersymmetr ic standard model is estimated numerically up to the 1-loop level by e xamining the possibility of its discovery at LEP 2. The formulae for t he numerical estimations are kept in full, no approximation being made : The radiative corrections from the 1-loop interactions to the mass o f the pseudoscalar Higgs boson, to the masses of the scalar top quarks , as well as to the masses of the two scalar Higgs bosons and to the m ixing angle between them, are all taken into account in order to ensur e consistency and exactness. The production of the lighter scalar Higg s boson in e(+)e(-) collisions at LEP 2 are then examined, where both the three dominant channels and their interferences are considered. At the proposed center of mass energies of 175, 192, and 205 GeV for LEP 2, the production cross section of the lighter scalar Higgs boson sug gests that it may be discovered at LEP 2 if its mass is smaller than 7 8, 86, and 95 GeV for root s = 175, 192, and 205 GeV, respectively.