Quark matter in Neutron Stars within the Field Correlator Method

Abstract

We discuss the appearance of quark matter in neutron star cores', focussing 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 non-relativistic 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\bar q 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.

9 pages, 7 figures, revised version, tables and figures added

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• Hybrid star structure with the Field Correlator Method
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• Cooling of hybrid neutron stars with microscopic equations of state
• Thermodynamics of quark-gluon plasma at finite baryon density
• Medium Effects in MIT Bag Model for quark matter: Self consistent thermodynamical treatment
• Hybrid stars with color superconducting cores in an extended FCM model
• Is the central compact object in HESS J1731-347 a hybrid star with a quark core? An analysis with the constant speed of sound parametrization
• Strangelets at finite temperature in an equivparticle model
• The structure of hybrid neutron star in Einstein-$\Lambda$ gravity
• QCD Equation of State and Cosmological Parameters in Early Universe
• Strange quark matter and proto-strange stars in an equivaparticle model
• How Neutron Star Observations Point Towards Exotic Matter: Existing Explanations and a Prospective Proposal
• Neutron Star masses from the Field Correlator Method Equation of State
• On the anomalous mass defect of strange stars in the Field Correlator Method