Second look to the Polyakov loop Nambu–Jona-Lasinio model at finite baryonic density
| Autor: | M. Ángeles Pérez-García, C. Albertus, V. V. Sagun, O. Ivanytskyi |
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| Rok vydání: | 2019 |
| Předmět: |
High Energy Astrophysical Phenomena (astro-ph.HE)
Physics Quantum chromodynamics Nuclear Theory Equation of state (cosmology) High Energy Physics::Lattice High Energy Physics::Phenomenology FOS: Physical sciences Order (ring theory) Charge (physics) Computer Science::Digital Libraries Deconfinement Gluon Nuclear Theory (nucl-th) Baryon High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) Nambu–Jona-Lasinio model Astrophysics - High Energy Astrophysical Phenomena Mathematical physics |
| Zdroj: | Physical Review |
| ISSN: | 2470-0029 2470-0010 |
| DOI: | 10.1103/physrevd.100.103020 |
| Popis: | We revisit the Polyakov Loop coupled Nambu-Jona-Lasinio model that maintains the Polyakov loop dynamics in the limit of zero temperature. This is of interest for astrophysical applications in the interior of neutron stars. For this purpose we re-examine the form of the potential for the deconfinement order parameter at finite baryonic densities. Since the modification of this potential at any temperature is formally equivalent to assigning a baryonic charge to gluons, we develop a more general formulation of the present model that cures this spurious effect and is normalized to match the asymptotic behaviour of the QCD equation of state given by $\mathcal{O}(\alpha_s^2)$ and partial $\mathcal{O}(\alpha_s^3\ln^2\alpha_s)$ perturbative results. Comment: 10 pages, 3 figures. Accepted in Phys. Rev. D |
| Databáze: | OpenAIRE |
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