Higgs mass and b to s gamma constraints on SUSY models with no-scale boundary condition

Abstract

No-scale structure of the Kahler potential is obtained in many types of supersymmetric models. In this paper, phenomenological aspects of these models are investigated with special attention to the current Higgs mass bound at LEP and b \to s \gamma result at the CLEO. When the boundary condition is given at the GUT scale and gaugino masses are universal at this scale, very narrow parameter region is allowed only for positive Higgsino mass region if R-parity is conserved. The negative Higgsino mass case is entirely excluded. On the other hand, relatively large parameter region is allowed when the boundary condition is given above the GUT scale, and Tevatron can discover SUSY signals for the positive Higgs mass case. The no-scale models with Wino, Higgsino or sneutrino LSP are also considered. We show that the Higgs mass constraint is important for the Higgsino LSP case, which requires the LSP mass to be larger than about 245 GeV.