Transverse momentum distribution of J/Ψ produced in PbPb and p-A interactions at the CERN SPS

Abstract Muon pairs produced in Pb Pb interactions at 158 GeV/c per nucleon and in p-A interactions at 400 GeV/c, together with older S-U results obtained at 200 GeV/c are used to study the transverse momentum and transverse mass distributions of the J /Ψ.