Abstract
The production of neutral strange particlesK os , Λ and\(\bar \Lambda \) has been studied in 60 and 200 GeV per nucleon OAu and pAu collisions with the streamer chamber vertex spectrometer of the NA35 experiment at the CERN-SPS accelerator. Ratios of neutral strange particle production to negatively charged particle production in selected regions of phase space were measured to be the same in OAu and pAu reactions. The rates of strange particle production in central OAu collisions are about a factor of 16 higher than in pAu collisions when compared in the same regions of phase space. If an enhancement of strange particle production in OAu collisions relative to pAu collisions is considered to be a signature for quark-gluon plasma formation, no evidence supporting it is observed. The experimental results are compared to the Lund FRITIOF model.
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Quark matter formation and heavy ion collisions. M. Jacob, J. Tran Than Van (eds.): Phys. Rep. 88, 321 (1986). A recent review of QGP formation and its experimental signatures can be found in: K. Kajantie, L. McLerran: Rev. Nucl. Part. Sci. 37, 293 (1987)
The first set of experimental results may be found in Quark matter 1987. H. Satz, H. Specht, R. Stock (eds.): Z. Phys. C —Particles and Fields 38 (1988)
For a review see: P. Koch, B. Müller, J. Rafelski: Strangeness in relativistic heavy ion collisions. Phys. Rep. 142, 167 (1986)
I. Kogut, D. Sinclair: Phys. Rev. Lett. 60 (1988) 1250
T. Matsui et al.: Phys. Rev. D34 (1986) 2047; Kang S., Lee et al.: Phys. Rev. C37 (1988) 1452, 1463
M. Jacob, J. Rafelski: Phys. Lett B190 (1987) 173
G. Vesztergombi et al.: Z. Phys. C — Particles and Fields 38 (1988) 129
A. Bamberger et al.: Phys. Lett. B184 (1987) 271; A. Sandoval et al.: Nucl. Phys. A 461 (1987) 465c
M. Bartlett: Phil. Mag. 44 (1953) 249
Review of Particle Properties: Phys. Lett. B 170 (1986)
A preliminary discussion of π,p,K o s , Λ and\(\bar \Lambda \) transverse momentum spectra from this experiment in terms of models with radial expansion flow can be found in J. W. Harris et al.: Preprint LBL-26258 (1988), to be published in Quark Matter 88, Nucl. Phys. A. However, forK o s , Λ and\(\bar \Lambda \) spectra the experimental data are restricted to larger values ofp T and definite theoretical predictions do not exist
see e.g. R. Hagedorn: Riv. Nuovo Cimento 6 (1983) 1
B. Andersson et al.: Nucl. Phys. B281 (1987) 289: The program versions FRITIOF 1.6 and JETSET 6.2 were used, with standard parameters (the strange quark suppression factor was 0.3)
P. Sonderegger et al.: Z. Phys. C — Particles and Fields 38 (1988) 129
Y. Miake et al.: Z. Phys. C — Particles and Fields 38 (1988) 135
K. Jaeger et al.: Phys. Rev. D11 (1975) 2405
M. Asai et al.: Z. Phys. C — Particles and Fields 27 (1985) 11
J. Cronin et al.: Phys. Rev. D11 (1975) 3105; D. Antreasyan et al.: Phys. Rev. D 19 (1979) 764
H. Stroebele et al.: Z. Phys. C — Particles and Fields (1988) 89
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NA35 Collaboration., Bamberger, A., Bartke, J. et al. A study ofK os , Λ and\(\bar \Lambda \) production in 60 and 200 GeV per nucleon OAu and pAu collisions with a streamer chamber detector at the CERN SPSproduction in 60 and 200 GeV per nucleon OAu and pAu collisions with a streamer chamber detector at the CERN SPS. Z. Phys. C - Particles and Fields 43, 25–35 (1989). https://doi.org/10.1007/BF02430607
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DOI: https://doi.org/10.1007/BF02430607