Hybrid Neutron Stars Based on a Modified PNJL Model(Nuclear Astrophysics,New Frontiers in QCD 2010-Exotic Hadron Systems and Dense Matter-)

スポンサーリンク

概要

• 論文の詳細を見る

• We discuss a three-flavor Nambu-Jona-Lasinio (NJL) type quantum field theoretical approach to the quark matter equation of state (EoS) with scalar diquark condensate, isoscalar vector mean field and Kobayashi-Maskawa-'t Hooft (KMT) determinant interaction. While often the diquark and vector meson couplings are considered as free parameters, we will fix them here to their values according to the Fierz transformation of a one-gluon exchange interaction. In order to estimate the effect of a possible change in the vacuum pressure of the gluon sector at finite baryon density we exploit a recent modification of the Polyakov-loop NJL (mPNJL) model which introduces a parametric density dependence of the Polyakov loop potential also at T=0, thus being relevant for compact star physics. We use a Dirac-Brueckner-Hartree-Fock (DBHF) EoS for hadronic matter phase and discuss results for mass-radius relationships following from a solution of the TOV equations for such a hybrid EoS in the context of observational constraints from selected objects.

• 2010-12-17

著者

• Blaschke David

  Institute For Theoretical Physics University Of Wroclaw:bogoliubov Laboratory For Theoretical Physic

• BERDERMANN Jens

  DESY

• LASTOWIECKI Rafal

  Institute for Theoretical Physics, University of Wroclaw

• Lastowiecki Rafal

  Institute For Theoretical Physics University Of Wroclaw

関連論文

• Hybrid Neutron Stars Based on a Modified PNJL Model(Nuclear Astrophysics,New Frontiers in QCD 2010-Exotic Hadron Systems and Dense Matter-)

スポンサーリンク