Hadronic signatures of deconfinement in relativistic nuclear collisions

Johann Rafelski, J. Letessier, A. Tounsi

Research output: Chapter in Book/Report/Conference proceedingChapter

16 Citations (Scopus)

Abstract

We describe the remarkable accomplishments of the current heavy ion Pb-Pb collision experiments involving strange particle production, carried out at 158A GeV at CERN-SPS. Together with earlier 200A GeV S-induced reactions, these results imply that, at central rapidity, a novel mechanism of strangeness production arises, accompanied by excess entropy formation. We argue that: • these results are consistent with the formation of a space-time localized, highly excited, dense state of matter; • the freeze-out properties of strange hadrons are suggestive of the formation of a color-deconfined, thermally and nearly chemically equilibrated phase, which provides at present the only comprehensive framework to describe all experimental data; • the matter fireball is undergoing a transverse expansion with nearly the velocity of sound of relativistic matter; longitudinal expansion is not in the scaling regime. We present a first analysis of the recent Pb-Pb results and discuss several alternative reaction scenarios. We evaluate quantitatively strangeness production in the deconfined quark-gluon phase and obtain yields in agreement with the experimental observations made in 200A GeV S-W and 158A GeV Pb-Pb interactions. We also present a qualitative discussion of J/ψ results consistent with our understanding of strange particle results.

Original languageEnglish (US)
Title of host publicationActa Physica Polonica B
Pages2841-2872
Number of pages32
Volume28
Edition12
StatePublished - 1997

Fingerprint

strangeness
signatures
collisions
expansion
fireballs
particle production
hadrons
heavy ions
quarks
entropy
color
scaling
acoustics
interactions

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Rafelski, J., Letessier, J., & Tounsi, A. (1997). Hadronic signatures of deconfinement in relativistic nuclear collisions. In Acta Physica Polonica B (12 ed., Vol. 28, pp. 2841-2872)

Hadronic signatures of deconfinement in relativistic nuclear collisions. / Rafelski, Johann; Letessier, J.; Tounsi, A.

Acta Physica Polonica B. Vol. 28 12. ed. 1997. p. 2841-2872.

Research output: Chapter in Book/Report/Conference proceedingChapter

Rafelski, J, Letessier, J & Tounsi, A 1997, Hadronic signatures of deconfinement in relativistic nuclear collisions. in Acta Physica Polonica B. 12 edn, vol. 28, pp. 2841-2872.
Rafelski J, Letessier J, Tounsi A. Hadronic signatures of deconfinement in relativistic nuclear collisions. In Acta Physica Polonica B. 12 ed. Vol. 28. 1997. p. 2841-2872
Rafelski, Johann ; Letessier, J. ; Tounsi, A. / Hadronic signatures of deconfinement in relativistic nuclear collisions. Acta Physica Polonica B. Vol. 28 12. ed. 1997. pp. 2841-2872
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