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Xu, Nu; Bearden, I.G.; Bøggild, H.; Boissevain, J.; Dodd, J.; Erazmus, B.; Esumi, S.; Fabjan, C.W.; Ferenc, D.; Fields, D.E.; Franz, A.; Gaardhøje, J.J.; Hansen, O.; Hardtke, D.; van Hecke, H.; Holzer, E.B.; Humanic, T.; Hummel, P.; Jacak, B.V.; Jayanti, R.; Kaneta, M.; Kopytine, M.; Leltchouk, M.; Ljubicic, T.; Lörstad, B.; Maeda, N.; Medvedev, A.; Murray, M.; Nishimura, S.; Ohnishi, H.; Paic, G.; Pandey, S.U.; Piuz, F.; Pluta, J.; Polychronakos, V.; Potekhin, M.; Poulard, G.; Sakaguchi, A.; Simon-Gillo, J.; Schmidt-Sørensen, J.; Sondheim, W.; Spegel, M.; Sugitate, T.; Sullivan, J.P.; Sumi, Y.; Willis, W.J.; Wolf, K.; Xu, N.; Zachary, D.S.
Nuclear physics. A, 12/1996, Letnik: 610Journal Article
Proton distributions at midrapidity have been measured for 158A·GeV Pb+Pb collisions in the focusing spectrometer experiment NA44 at CERN. A high degree of nuclear stopping is found in the truly heavy ion collisions. Systematic results of single particle transverse momentum distributions of pions, kaons, and protons, of 200A·GeV S+S and 158A·GeV Pb+Pb central collisions will be addressed within the context of thermalization. By comparing these data with thermal and transport models, freeze-out parameters such as the temperature parameter T fo and mean collective flow velocity 〈β〉 are extracted. Preliminary results of the particle ratios of K − K + and p p are discussed in the context of cascade models of RQMD and VENUS.
