Mid-rapidity protons in 158A·GeV Pb+Pb collisions

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. KanetaM. 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

Research output: Contribution to journalArticlepeer-review

46 Citations (Scopus)


Proton distributions at mid-rapidity (2 ≤ y ≤ 3) have been measured for 158A·GeV Pb+Pb collisions in the focusing spectrometer experiment NA44 at CERN. From baryon number conservation and by comparing the experimentally measured dN/dy distribution with the transport model RQMD, we conclude that a rather high degree of nuclear stopping has been reached for the truly heavy-ion collisions at these energies. Transverse mass distributions exhibit characteristically thermal shapes and the slope parameters increase with the mass of the colliding system.

Original languageEnglish
Pages (from-to)431-436
Number of pages6
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number2
Publication statusPublished - 1996 Nov 14


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