Irreversibility, steady state, and non-equilibrium physics in relativistic heavy ion collisions

Details Irreversibility, steady state, and non-equilibrium physics in relativistic heavy ion collisions Irreversibility, steady state, and non-equilibrium physics in relativistic heavy ion collisions

1999-01-20

arxiv.org/abs/hep-ph/9901356v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, REVTEX, 1 eps-figure embedded

Scientific paper

Heavy ion collisions at ultrarelativistic energies offer the opportunity to study the irreversibility of multiparticle processes. Together with the many-body decays of resonances, the multiparticle processes cause the system to evolve according to Prigogine's steady states rather than towards statistical equilibrium. These results are general and can be easily checked by any microscopic string-, transport-, or cascade model for heavy ion collisions. The absence of pure equilibrium states sheds light on the difficulties of thermal models in describing the yields and spectra of hadrons, especially mesons, in heavy ion collisions at bombarding energies above 10 GeV/nucleon.

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