scholarly journals Cold magnetized quark matter phase diagram within a generalized SU(2) NJL model

2015 ◽  
Vol 91 (11) ◽  
Author(s):  
P. G. Allen ◽  
V. Pagura ◽  
N. N. Scoccola
Keyword(s):  
Phase Diagram ◽  
Quark Matter ◽  
Njl Model ◽  
Matter Phase

Nuclear-matter—quark-matter phase diagram with strangeness

1989 ◽  
Vol 40 (1) ◽  
pp. 157-164 ◽  
Author(s):  
H. W. Barz ◽  
B. L. Friman ◽  
J. Knoll ◽  
H. Schulz
Keyword(s):  
Phase Diagram ◽  
Nuclear Matter ◽  
Quark Matter ◽  
Matter Phase

scholarly journals Influence of the Effective Potential on the Crossover Width in the Two Flavor Polyakov-Nambu-Jona-Lasinio Model

2020 ◽  
Vol 2020 ◽  
pp. 1-14
Author(s):  
E. Valbuena-Ordóñez ◽  
N. B. Mata-Carrizal ◽  
A. J. Garza-Aguirre ◽  
J. R. Morones-Ibarra
Keyword(s):  
Phase Diagram ◽  
Phase Diagrams ◽  
Effective Potential ◽  
Crossover Region ◽  
Effective Potentials ◽  
End Point ◽  
Strongly Interacting ◽  
Njl Model ◽  
Matter Phase

We study the strongly interacting matter phase diagram on the T−μ plane through the two flavor Polyakov extended NJL model. We compare the phase diagrams obtained from three different effective potentials, focusing on the behavior of the width of the crossover region and the critical end point for each case. We describe various susceptibilities to obtain the chiral crossover and the color deconfinement crossover.

scholarly journals Pions in the quark matter phase diagram

2008 ◽  
Author(s):  
D. Zablocki ◽  
D. Blaschke ◽  
R. Anglani ◽  
Joseph Cugnon ◽  
Lansberg Jean-Philippe ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Quark Matter ◽  
Matter Phase

scholarly journals Hadron–Quark Phase Transition in the SU (3) Local Nambu–Jona-Lasinio (NJL) Model with Vector Interaction

Symmetry ◽  
2021 ◽  
Vol 13 (1) ◽  
pp. 124 ◽  
Author(s):  
Grigor Alaverdyan
Keyword(s):  
Phase Transition ◽  
Quark Matter ◽  
Chemical Potential ◽  
Hadronic Matter ◽  
Coupling Constant ◽  
Vector Coupling ◽  
Vector Coupling Constant ◽  
Njl Model ◽  
Matter Phase ◽  
Quark Phase

We study the hadron–quark hybrid equation of state (EOS) of compact-star matter. The Nambu–Jona-Lasinio (NJL) local SU (3) model with vector-type interaction is used to describe the quark matter phase, while the relativistic mean field (RMF) theory with the scalar-isovector δ-meson effective field is adopted to describe the hadronic matter phase. It is shown that the larger the vector coupling constant GV, the lower the threshold density for the appearance of strange quarks. For a sufficiently small value of the vector coupling constant, the functions of the mass dependence on the baryonic chemical potential have regions of ambiguity that lead to a phase transition in nonstrange quark matter with an abrupt change in the baryon number density. We show that within the framework of the NJL model, the hypothesis on the absolute stability of strange quark matter is not realized. In order to describe the phase transition from hadronic matter to quark matter, Maxwell’s construction is applied. It is shown that the greater the vector coupling, the greater the stiffness of the EOS for quark matter and the phase transition pressure. Our results indicate that the infinitesimal core of the quark phase, formed in the center of the neutron star, is stable.

scholarly journals Hadron-Quark Phase Transition in the SU(3) Local Nambu – Jona-Lasinio (NJL) Model with Vector Interaction

2020 ◽  
Author(s):  
Grigor Alaverdyan
Keyword(s):  
Phase Transition ◽  
Quark Matter ◽  
Strange Quark ◽  
Hadronic Matter ◽  
Coupling Constant ◽  
Vector Coupling ◽  
Vector Coupling Constant ◽  
Njl Model ◽  
Matter Phase ◽  
Quark Phase

We study the hadron-quark hybrid equation of state (EOS) of compact-star matter. The Nambu—Jona-Lasinio (NJL) local SU(3) model with vector-type interaction is used to describe the quark matter phase, while the relativistic mean field (RMF) theory with scalar-isovector $\delta$-meson effective field adopted to describe the hadronic matter phase. It is shown that the larger the vector coupling constant, the lower the threshold density for the appearance of strange quarks. For a sufficiently small value of the vector coupling constant, the functions of the mass dependence on the baryonic chemical potential have regions of ambiguity which leads to a phase transition in non-strange quark matter with an abrupt change in the baryon number density. We show that within the framework of the NJL model, the hypothesis on the absolute stability of strange quark matter is not realized. In order to describe the phase transition from hadronic matter to quark matter, the Maxwell's construction is applied. It is shown that the greater the vector coupling, the greater the stiffness of the EOS for quark matter and the phase transition pressure. Our results indicate that the infinitesimal core of the quark phase, formed in the center of the neutron star, is stable.

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