Low-m_t charged pion asymmetry enhancement from hadronization of QGP

Details Low-m_t charged pion asymmetry enhancement from hadronization of QGP Low-m_t charged pion asymmetry enhancement from hadronization of QGP

1999-11-12

arxiv.org/abs/nucl-th/9911043v2

Phys.Lett. B475 (2000) 213-219

Physics

Nuclear Physics

Nuclear Theory

6 pages incl. 4 figures, v2 extends discussion of other explanations of the effect, adds references

Scientific paper

10.1016/S0370-2693(00)00088-5

We show that in sudden hadronization of QGP a non-equilibrium value of the pion phase space occupancy parameter gamma_q>1 is expected in order to accommodate the entropy excess in QGP and the process of gluon fragmentation. When gamma_q is near to its maximum allowed value, pion overabundance is shown to arise at low $m_\bot$, 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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