Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-07-31
Phys.Rev.C75:035804,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
5 pages,5 eps figures, title changed, references added, accepted by Phys. Rev. C (Brief Report)
Scientific paper
10.1103/PhysRevC.75.035804
The quark matter equation of state (EOS) derived from the standard Nambu - Jona-Lasinio (NJL) model is soft enough to render neutron stars (NS) unstable at the onset of the deconfined phase, and no pure quark matter can be actually present in its interior. Since this is a peculiarity of the NJL model, we have studied a modified NJL model with a momentum cut-off which depends on the density. This procedure, which improves the agreement between QCD and NJL model at large density, modifies the standard NJL equation of state, and then it is potentially relevant for the stability analysis of neutron stars. We show that also within this approach, the NS instability still persists, and that the vacuum pressure, as a signal of quark confinement, has a fundamental role for the NS stability. In this respect, our conclusions point to a relationship between confinement and NS stability.
Baldo Marcello
Burgio G. F.
Castorina Paolo
Plumari Salvatore
Zappala' Dario
No associations
LandOfFree
Quark matter in neutron stars within the Nambu - Jona-Lasinio model and confinement does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Quark matter in neutron stars within the Nambu - Jona-Lasinio model and confinement, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quark matter in neutron stars within the Nambu - Jona-Lasinio model and confinement will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-33374