5-9 October 2020
Online
Europe/Moscow timezone
The conference is over. We would like to thank all participants for their attendance!

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

9 Oct 2020, 11:15
15m
Astroparticle (Zoom)

Astroparticle

Zoom

https://zoom.us/j/91569101817
Oral talk Astroparticle physics Astroparticle Physics

Speaker

Oleksii Ivanytskyi (Bogolyubov Institute for Theoretical Physics of NAS of Ukraine)

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 $\mathcal{O}(𝛼_𝑠^2)$ 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

Oleksii Ivanytskyi (Bogolyubov Institute for Theoretical Physics of NAS of Ukraine) Prof. Maria Angeles Perez Garcia (University of Salamanca) Violetta Sagun (University of Coimbra) Prof. Conrado Albertus (University of Salamanca)

Presentation Materials

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