We discuss the appearance of quark matter in neutron star cores, focusing on the possibility that the recent observation of a very heavy neutron star could constrain free parameters of quark matter models. For that, we use the equation of state derived with the field correlator method, extended to the zero temperature limit, whereas for the hadronic phase we use the equation of state obtained within both the nonrelativistic and the relativistic Brueckner- Hartree-Fock many-body theory. We find a strong dependence of the maximum mass both on the value of the q (q) over bar interaction V-1 and on the gluon condensate G(2), for which we introduce a dependence on the baryon chemical potential mu(B). We find that the maximum masses are consistent with the observational limit for not too small values of V-1.
We discuss the appearance of quark matter in neutron star cores, focusing on the possibility that the recent observation of a very heavy neutron star could constrain free parameters of quark matter models. For that, we use the equation of state derived with the field correlator method, extended to the zero temperature limit, whereas for the hadronic phase we use the equation of state obtained within both the nonrelativistic and the relativistic Brueckner- Hartree-Fock many-body theory. We find a strong dependence of the maximum mass both on the value of the q (q) over bar interaction V-1 and on the gluon condensate G(2), for which we introduce a dependence on the baryon chemical potential mu(B). We find that the maximum masses are consistent with the observational limit for not too small values of V-1.
Quark matter in neutron stars within the field correlator method
PLUMARI, SALVATORE;GRECO, VINCENZO;
2013-01-01
Abstract
We discuss the appearance of quark matter in neutron star cores, focusing on the possibility that the recent observation of a very heavy neutron star could constrain free parameters of quark matter models. For that, we use the equation of state derived with the field correlator method, extended to the zero temperature limit, whereas for the hadronic phase we use the equation of state obtained within both the nonrelativistic and the relativistic Brueckner- Hartree-Fock many-body theory. We find a strong dependence of the maximum mass both on the value of the q (q) over bar interaction V-1 and on the gluon condensate G(2), for which we introduce a dependence on the baryon chemical potential mu(B). We find that the maximum masses are consistent with the observational limit for not too small values of V-1.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
