A realistic model is used for the phase transition between the color deconfining quark-gluon plasma phase and the color confining hadronic gas phase of nuclear matter to discuss the question how quarks and antiquarks hadronize in an expanding quark-gluon plasma. Particular attention is given to the problem associated with the latent heat and latent entropy set free in the hadronization process. Assuming a specific space-time scenario for the phase transition, relative abundances are computed for different hadronic particles and resonances produced during hadronization, showing that in particular antinucleons and light antinuclei are enhanced above their equilibrium abundances in a hadron …
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A realistic model is used for the phase transition between the color deconfining quark-gluon plasma phase and the color confining hadronic gas phase of nuclear matter to discuss the question how quarks and antiquarks hadronize in an expanding quark-gluon plasma. Particular attention is given to the problem associated with the latent heat and latent entropy set free in the hadronization process. Assuming a specific space-time scenario for the phase transition, relative abundances are computed for different hadronic particles and resonances produced during hadronization, showing that in particular antinucleons and light antinuclei are enhanced above their equilibrium abundances in a hadron gas of similar density and temperature. This enhancement is interpreted as a possible signature for the existence of a transient quark-gluon plasma phase in relativistic heavy-ion collisions which can complement the widely discussed strangeness signal. However, detailed dynamical studies of the hadronization process are necessary in order to definitevely settle questions about the quantitative yields. 21 refs., 8 figs.
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