Evidence for a phase with high specific entropy in nuclear collisions

J. Letessier, A. Tounsi, U. Heinz, J. Sollfrank, Johann Rafelski

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We determine the entropy-per-baryon content of the central reaction region in terms of the charged particle multiplicity. We study the consistency of our findings with recent data on strange antibaryon production at 200A GeV in S-A collisons (A∼200) assuming formation of a central fireball. Hadron gas models which do not invoke strong medium modifications of hadron masses do not provide enough entropy and are inconsistent with the combined experimental results. In contrast the quark-gluon plasma hypothesis explains them naturally.

Original languageEnglish (US)
Pages (from-to)3530-3533
Number of pages4
JournalPhysical Review Letters
Issue number23
Publication statusPublished - 1993


ASJC Scopus subject areas

  • Physics and Astronomy(all)

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