The Modern Physics of Compact Stars and Relativistic Gravity 2019

17-21 September 2019
Yerevan, Armenia
Etc/GMT+4 timezone

Second look to the Polyakov Loop Nambu-Jona-Lasinio model at finite baryonic density

18 Sep 2019, 15:30
30m
Yerevan, Armenia

Yerevan, Armenia

Department of Physics, Alex Manoogian str. 1, Yerevan, Armenia

Speaker

Dr Oleksii Ivanytskyi (University of Salamanca)

Description

We revisit the Polyakov Loop coupled Nambu-Jona-Lasinio model that maintains the Polyakov loop dynamics at zero temperature, which is the most interesting for astrophysical applications. For this purpose we re-examine potential for the deconfinement order parameter at finite baryonic densities. Secondly, and the most important, we explicitly demonstrate that naive modification of this potential at any temperature is formally equivalent to assigning a baryonic charge to gluons. We develop a general formulation of the present model which is free of the discussed defect and is normalized to asymptotic of the QCD equation of state given by $\mathcal{O}(\alpha_s^2)$ perturbative results. We also demonstrate that incorporation of the Polyakov loop dynamics to the present model sizably stiffens the quark matter equation of state supporting an existence of heavy compact stars with quark cores.

Primary authors

Dr Oleksii Ivanytskyi (University of Salamanca) M. Angeles Perez-Garcia (University of Salamanca and IUFFyM) Dr Violetta Sagun (University of Coimbra) Conrado Albertus (University of Salamanca)