Hadron distributions — Recent results from the CERN experiment NA44

✍ Scribed by Nu Xu; I.G. Bearden; H. Bøggild; J. Boissevain; J. Dodd; B. Erazmus; S. Esumi; C.W. Fabjan; D. Ferenc; D.E. Fields; A. Franz; J.J. Gaardhøje; O. Hansen; D. Hardtke; H. van Hecke; E.B. Holzer; T. Humanic; P. Hummel; B.V. Jacak; R. Jayanti; M. Kaneta; M. Kopytine; M. Leltchouk; T. Ljubicic; B. Lörstad; N. Maeda; A. Medvedev; M. Murray; S. Nishimura; H. Ohnishi; G. Paic; S.U. Pandey; F. Piuz; J. Pluta; V. Polychronakos; M. Potekhin; G. Poulard; A. Sakaguchi; J. Simon-Gillo; J. Schmidt-Sørensen; W. Sondheim; M. Spegel; T. Sugitate; J.P. Sullivan; Y. Sumi; W.J. Willis; K. Wolf; N. Xu; D.S. Zachary

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 783 KB
• Volume: 610
• Category: Article
• ISSN: 0375-9474
• DOI: 10.1016/s0375-9474(96)00353-3

✦ Synopsis

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 Tfo and mean collective flow velocity (/~) are extracted. Preliminary results of the particle ratios of K-/K + and ~/p are discussed in the context of cascade models of RQMD and VENUS.