Strange quark matter within the Nambu-Jona-Lasinio model

Equation of state of baryon rich quark matter is studied within the SU(3) Nambu Jona-Lasinio model with flavour mixing interaction. Possible bound states (strangelets) and chiral phase transitions in this matter are inve
Equation of state of baryon rich quark matter is studied within the SU(3) Nambu Jona-Lasinio model with flavour mixing interaction. Possible bound states (strangelets) and chiral phase transitions in this matter are investigated at various values of strangeness fraction rs. The model predictions are very sensitive to the ratio of vector and scalar coupling constants, ¾ = GV /GS. At ¾ = 0.5 and zero temperature the maximum binding energy (about 15 MeV per baryon) takes place at rs C 0.4. Such strangelets are negatively charged and have typical life times < 10 7 s. The calculations are carried out also at finite temperatures. They show that bound states exist up to temperatures of about 15 MeV. The model predicts a first order chiral phase transition at finite baryon densities. The parameters of this phase transition are calculated as a function of rs.
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Metadaten
Author:Igor N. Mishustin, Leonid M. Satarov, Horst Stöcker, Walter Greiner
URN:urn:nbn:de:hebis:30-21911
Document Type:Preprint
Language:English
Date of Publication (online):2005/11/22
Year of first Publication:2000
Publishing Institution:Univ.-Bibliothek Frankfurt am Main
Release Date:2005/11/22
Tag:Nambu-Jona-Lasinio Modell; Quark Materie ; baryon ; reich
Nambu-Jona-Lasinio model; baryon ; quark matter ; rich
Source:Phys.Atom.Nucl.64:802-811,2001. [hep-ph/0010223]
HeBIS PPN:185435475
Institutes:Physik
Dewey Decimal Classification:530 Physik
Sammlungen:Universitätspublikationen
Licence (German):License Logo Veröffentlichungsvertrag für Publikationen

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