The Quark Gluon Pion Plasma

Details The Quark Gluon Pion Plasma The Quark Gluon Pion Plasma

2002-02-24

arxiv.org/abs/hep-ph/0202225v3

Phys.Lett. B552 (2003) 165-171

Physics

High Energy Physics

High Energy Physics - Phenomenology

Rewritten, new figures

Scientific paper

10.1016/S0370-2693(02)03149-0

While it is commonly believed that there is a {\it direct} transition from the hadronic to a quark gluon phase at high temperature, it would be prejudicial to rule out a sequence of dynamically generated intermediate scales. Using as guide, an effective lagrangian with unconfined gluons and constituent quarks, interacting with a chiral multiplet, we examine a scenario in which the system undergoes first-order transitions at $ T_{comp}$, the compositeness scale of the pions, at $T_{\chi}$, the scale for spontaneous chiral symmetry breaking, and at $T_c$, the confinement temperature. We find that at current energies, it is likely that the formation temperature of the plasma, $ T_0 < T_{comp} $, and that this is therefore a quark gluon pion plasma (QGPP) rather than the usual quark gluon plasma (QGP). We propose some dilepton-related signatures of this scenario.

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