Metastable quark-antiquark droplets within the Nambu-Jona-Lasinio model

Chemically non equilibrated quark antiquark matter is studied within the Nambu Jona-Lasinio model. The equations of state of non strange (q = u, d) and strange (q = s) qq systems are calculated in the mean field approxim
Chemically non equilibrated quark antiquark matter is studied within the Nambu Jona-Lasinio model. The equations of state of non strange (q = u, d) and strange (q = s) qq systems are calculated in the mean field approximation. The existence of metastable bound states with zero pressure is predicted at finite densities and temperatures T 50 MeV. It is shown that the minimum energy per particle occurs for symmetric systems, with equal densities of quarks and antiquarks. At T = 0 these metastable states have quark number densities of about 0.5 fm 3 for q = u, d and of 1 fm 3 for q = s. A first order chiral phase transition is found at finite densities and temperatures. The critical temperature for this phase transition is approximately 75 MeV (90 MeV) for the non strange (strange) baryon free quark antiquark matter. For realistic choices of parameters, the model does not predict a phase transition in chemically equilibrated systems. Possible decay channels of the metastable qq droplets and their signatures in relativistic heavy ion collisions are discussed.
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Metadaten
Author:Igor N. Mishustin, Leonid M. Satarov, Horst Stöcker, Walter Greiner
URN:urn:nbn:de:hebis:30-22855
Document Type:Preprint
Language:English
Date of Publication (online):2005/12/07
Year of first Publication:1998
Publishing Institution:Univ.-Bibliothek Frankfurt am Main
Release Date:2005/12/07
Tag:Nambu Jona-Lasinio Modell ; Quark Antiquark ; Zustandsgleichung
Nambu Jona-Lasinio model ; equation of state; quark antiquark
Source:Phys.Rev.C59:3343-3356,1999 ; http://www.arxiv.org/abs/hep-ph/9812319
HeBIS PPN:185329462
Institutes:Physik
Dewey Decimal Classification:530 Physik
Sammlungen:Universitätspublikationen
Licence (German):License Logo Veröffentlichungsvertrag für Publikationen

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