New strangeness results from HADES

Abstract

New results concerning the production of K_s16, K_s13_s178722_s19, phi, K0S and _s13_s17923_s19 particles in the reaction Ar _s16 KCl at 1.76 AGeV measured by the HADES Collaboration are presented. Transverse momentum distributions have been measured in several rapidity slices for all the particles mentioned above in a large fraction of the phase space. For the first time, at SIS energy, K_s16, K_s13_s178722_s19 and phi have been measured independently and the slope parameter for phi could be extracted. A large statistics has been collected for the produced K0S and _s13_s17923_s19 in the phase space region around mid-rapity. The high quality of these data render them very suitable for comparisons with theoretical models.