Statistical bootstrap analysis of S+Ag interaction at 200 AGeV: Evidence of a phase beyond the hadronic one?

A generalized strangeness-including statistical bootstrap model (SSBM) is c onstructed so as to include independent fugacities for up and down quacks. Such an extension is crucial for the confrontation of multiparticle data em erging from heavy ion collisions, wherein isospin symmetry is not satisfied . Two constraints, in addition to the presence of a critical surface which sets the boundaries of the hadronic world, enter the extended model. An ana lysis pertaining to produced particle multiplicities and ratios is performe d for the S + Ag interaction at 200 GeV/nucleon. The resulting evaluation, concerning the location of the source of the produced system, is slightly i n favor of the source being outside the hadronic domain.