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30 March 2020 to 3 April 2020
Porto Rio Hotel, Patras, Greece
Europe/Athens timezone

Second look to the Polyakov loop Nambu–Jona-Lasinio model of quark matter in hybrid stars

30 Mar 2020, 17:15
15m
Room 1

Room 1

Oral Presentation Dense matter in neutron stars Parallel 3A

Speaker

Oleksii Ivanytskyi (University of Salamanca)

Description

We revisit the Polyakov Loop coupled Nambu-Jona-Lasinio model that maintains the Polyakov loop dynamics in the limit of zero temperature. For this purpose we re-examine the form of the potential for the deconfinement order parameter at finite baryonic densities. Secondly, and the most important, we explicitly demonstrate that a modification of this potential at any temperature is formally equivalent to assigning a baryonic charge to gluons. In order to avoid this spurious effect we develop a more general formulation of the present model that cures this defect and is normalized to match the asymptotic behaviour of the QCD equation of state given by O(αs2) and partial O(αs3ln2αs) perturbative results. Incorporation of the Polyakov loop dynamics to the model leads to significant stiffening of the quark matter equation of state, which is important for reaching the limit of two solar masses of compact stars.

Authors

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

Presentation materials

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