Abstract
We present recent results on single particle transverse momentum distributions of pions, kaons and protons, measured in CERN Experiment NA44, of 200 AGeV/c S+S and 158 AGeV/c Pb+Pb central collisions. By comparing these data with thermal and transport models, freeze-out parameters like the temperatureT fo and the chemical potentials (μ q ,μ s ) are extracted and discussed.
Similar content being viewed by others
References
E. Fermi,Progr. Theor. Phys. 5 (1950) 570.
I. Ya. Pomeranchuk,Dokl. Akad. Sci. U.S.S.R. 78 (1951) 884.
L.D. Landau,Izv. Akad. Nauk SSSR, Ser. Fiz. 17 (1953) 51.
E. Schnedermann, Y. Sollfrank and U. Heinz,Phys. Rev. C48 (1993) 2462.
P. Braun-Munzinger, J. Stachel, J.P. Wessels and N. Xu,Phys. Lett. B344 (1995) 43.; ibid, P. Braun-Munzinger, J. Stachel, J.P. Wessels and N. Xu,Phys. Lett. B365 (1996) 1.
J. Letessier, J. Rafelski and A. Tounsi,Phys. Lett. B328 (1994) 499 and J. Letessier, A. Tounsi, U. Heinz, J. Sollfrank and J. Rafelski,Phys. Rev. Lett.,70 (1993) 3530.
P. Braun-Munzinger and J. Stachel,J. Phys. G: Nucl. Part. Phys.,21 (1995) L17.
V. Koch, G.E. Brown and C.M. Ko,Phys. Lett. B265 (1991) 29; V. Koch,Nucl. Phys. A591 (1995) 531c.
H. Beker et al., (The NA44 Collaboration),Phys. Lett. B302 (1993) 510.
A. Franz, (The NA44 Collaboration),Quark Matter ’96 Proceedings, May 1996.
N. Xu, (The NA44 Collaboration),Quark Matter ’96 Proceedings, May 1996, and H. Bøggiled, The NA44 Collaboration, to be submitted toPhys. Lett. B.
H. Bøggiled et al., The NA44 Collaboration,Phys. Lett. B, in press.
J. Pluta et al., using RQMD plus longitudinal comoving charge of Z eff =40 per unit rapidity, the observed N(π−/N(π+)) ratio [11, 12] can be well reproduced.
D. Alper et al.,Nucl. Phys. B100, (1975) 237 and Guettler et al.,Nucl. Phys. B116 (76) 77.
F. Cooper, G. Frye and E. Schonberg,Phys. Rev. Lett. 32 (1974) 862.
E.V. Shuryak,Sov. J. Nucl. Phys.,V20, No. 3, (1972) 295.
R. Hagedorn,Suppl. Nuovo Cim. III.2 (1965) 147; H. Stöcker, A.A. Ogloblin, and W. Greiner,Z. Phys. A303 (1981) 259.
H. Sorge, H. Stöcker and W. Greiner,Ann. Phys. (NY),192 (1989) 266; H. Sorge,Phys. Rev. C52 (1995) 3291.
K. Werner,Phys. Rep. 232 (1993) 87.
L. Camilleri,Phys. Rep. V144(2) (1987) 51.
J. Letessier et al.,Phys. Rev. C51 (1995) 3408.
J. Rafelski and M. Danos,Phys. Rev. C50 (1994) 1684.
S. Gavin, M. Gyulassy, M. Plümer and R. Venugopalan,Phys. Lett. B234 (1990) 175.
B.V. Jacak, NATO Advanced Study Institute, ‘Hot and Dense Nuclear Matter’, p. 607, Bodrum, Turkey, eds. W. Greiner, H. Stöcker and A. Gallmann, Plenum Press, 1994.
M. Murray, (The NA44 Collaboration), Proceedings of ‘Strangeness in Hadronic Matter’, ed. J. Rafelski, AIP Press, 1995, p. 162.
Author information
Authors and Affiliations
Consortia
Additional information
the NA44 Collaboration
NBI — LANL — Columbia — CERN — Nantes — Hiroshima — Zagreb — OSU — Lund — Texas A & M — BNL
Rights and permissions
About this article
Cite this article
Xu, N., the NA44 Collaboration., Bearden, I.G. et al. Freeze-out conditions in ultrarelativistic heavy-ion collisions. APH N.S., Heavy Ion Physics 4, 263–270 (1996). https://doi.org/10.1007/BF03155622
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF03155622