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 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.
| 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): | 22.11.2005 |
| Year of first Publication: | 2000 |
| Publishing Institution: | Univ.-Bibliothek Frankfurt am Main |
| 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): |  Veröffentlichungsvertrag für Publikationen ohne Print on Demand |
