Strange quark stars within the Nambu-Jona-Lasinio model

We investigate the properties of charge neutral equilibrium cold quark matter within the Nambu Jona-Lasinio model. The calculations are carried out for di erent ratios of coupling constants characterizing the vector and 
We investigate the properties of charge neutral equilibrium cold quark matter within the Nambu Jona-Lasinio model. The calculations are carried out for di erent ratios of coupling constants characterizing the vector and scalar 4 fermion interaction, xi = GV /GS. It is shown that for xi < 0.4 matter is self bound and for xi < 0.65 it has a first order phase transition of the liquid gas type. The Gibbs conditions in the mixed phase are applied for the case of two chemical potentials associated with the baryon number and electric charge. The characteristics of the quark stars are calculated for xi = 0, 0.5 and 1. It is found that the phase transition leads to a strong density variation at the surface of these stars. For xi = 1 the properties of quark stars show behaviors typical for neutron stars. At >< 0.4 the stars near to the maximum mass have a large admixture of strange quarks in their interiors. PACS number: 14.65.-q, 26.60.+c, 97.10.-q
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Metadaten
Author:Matthias Hanauske, Leonid M. Satarov, Igor N. Mishustin, Horst Stöcker, Walter Greiner
URN:urn:nbn:de:hebis:30-21741
Document Type:Preprint
Language:English
Date of Publication (online):2005/11/21
Year of first Publication:2001
Publishing Institution:Univ.-Bibliothek Frankfurt am Main
Release Date:2005/11/21
Tag:Nambu Jona-Lasinio Modell ; Quark-Sterne; kalte dunkle Materie
Nambu Jona-Lasinio model ; cold quark matter ; strange quark star
Source:Phys.Rev.D64:043005,2001. [astro-ph/0101267]
HeBIS PPN:185529291
Institutes:Physik
Dewey Decimal Classification:530 Physik
Sammlungen:Universitätspublikationen
Licence (German):License Logo Veröffentlichungsvertrag für Publikationen

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