Abstract : 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 flow velocities are extracted. Central-toperipheral nuclear modification factors at 160 A GeV/c are calculated.
P.A. Bacon, A. Badala, R. Barbera, A. Belogianni, A. Bhasin, et al.. Latest results from NA57.. HEP2005 Europhysics Conference, Jul 2005, Lisbonne, Portugal. pp.126. ⟨in2p3-00080177⟩