Can Binary Bound States in a Strongly Coupled Quark-Gluon Plasma be observed via dileptons and photons?

Details Can Binary Bound States in a Strongly Coupled Quark-Gluon Plasma be observed via dileptons and photons? Can Binary Bound States in a Strongly Coupled Quark-Gluon Plasma be observed via dileptons and photons?

2004-08-16

arxiv.org/abs/hep-ph/0408178v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

Second version has only minor corrections of editorial type, put it before submission to PRC

Scientific paper

Recently there was a significant change of views on physical properties and underlying dynamics of Quark-Gluon Plasma at $T=170-350 MeV$, produced in heavy ion collisions at RHIC. Instead of weakly coupled gas of quasiparticles, it is rather a liquid-like matter with multiple bound states. In this paper we discuss how one can test these ideas experimentally, using the ``penetrating probes'' and looking for certain peaks at some invariant masses. In dileptons the most promising are modified $\rho,\omega$, with $M(T\approx T_c)\sim .5 GeV$ and also near zero binding at $M(T\approx (1.5-2)T_c)=1.5-2 GeV$. We also discuss the observability of peaks corresponding to scalar/pseudoscalar mesons in the two-photon channel.

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