出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：NA57 at the CERN SPS has studied the production of strange particles in Pb.Pb and p.Be collisions.
Hyperon enhancements at 40 A GeV/c are presented and compared to results at 160
GeV/c beam momenta. The momentum spectra are analysed based on hydrodynamical models
and freeze-out temperature, transverse and longitudinal ow velocities are extracted. Central-toperipheral
nuclear modication factors at 160 A GeV/c are calculated.
