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Low-mt charged pion asymmetry enhancement from hadronization of QGP

Jean Letessier, Ahmed Tounsi, Johann Rafelski

nucl-tharXiv:nucl-th/9911043

Abstract

We show that in sudden hadronization of QGP a non-equilibrium value of the pion phase space occupancy parameter gammaq>1 is expected in order to accommodate the entropy excess in QGP and the process of gluon fragmentation. When gammaq is near to its maximum allowed value, pion overabundance is shown to arise at low m, where the charged pion asymmetry is also amplified. These effects are considered and we show that their magnitude suffices to explain pertinent experimental data obtained in 160-200AGeV Pb- and S- induced reactions.

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