Are we close to the QGP? - Hadrochemical vs. microscopic analysis of particle production in ultrarelativistic heavy ion collisions

Abstract

Ratios of hadronic abundances are analyzed for pp and nucleus-nucleus collisions at sqrt(s)=20 GeV using the microscopic transport model UrQMD. Secondary interactions significantly change the primordial hadronic cocktail of the system. A comparison to data shows a strong dependence on rapidity. Without assuming thermal and chemical equilibrium, predicted hadron yields and ratios agree with many of the data, the few observed discrepancies are discussed.

12 pages, 4 figures

References in corpus (3)

• Directed and Elliptic Flow in 158 GeV/Nucleon Pb + Pb Collisions
• Evidence for a high entropy phase in nuclear collisions
• Strange Particle Freeze-Out

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