Nuclear matter calculations with isobar degrees of freedom for the Paris potential and isobar self-energy

1987 ◽  
Vol 327 (1) ◽  
pp. 33-39 ◽  
Author(s):  
Jishnu Dey ◽  
M. A. Matin ◽  
B. C. Samanta
Keyword(s):  
Nuclear Matter ◽  
Degrees Of Freedom ◽  
Self Energy ◽  
Paris Potential

Nuclear matter with Δ degrees of freedom

1990 ◽  
Vol 519 (1-2) ◽  
pp. 269-278 ◽  
Author(s):  
Lidia S. Ferreira
Keyword(s):  
Nuclear Matter ◽  
Degrees Of Freedom

A NUCLEAR MANY-BODY THEORY AT FINITE TEMPERATURE APPLIED TO A PROTONEUTRON STAR

2002 ◽  
Vol 11 (02) ◽  
pp. 83-104 ◽  
Author(s):  
GUILHERME F. MARRANGHELLO ◽  
CESAR A. Z. VASCONCELLOS ◽  
MANFRED DILLIG ◽  
J. A. DE FREITAS PACHECO
Keyword(s):  
Phase Transition ◽  
Nuclear Matter ◽  
Finite Temperature ◽  
Degrees Of Freedom ◽  
Many Body ◽  
Many Body Theory ◽  
The Masses ◽  
Protoneutron Stars ◽  
Protoneutron Star

Thermodynamical properties of nuclear matter are studied in the framework of an effective many-body field theory at finite temperature, considering the Sommerfeld approximation. We perform the calculations by using the nonlinear Boguta and Bodmer model, extended by the inclusion of the fundamental baryon octet and leptonic degrees of freedom. Trapped neutrinos are also included in order to describe protoneutron star properties through the integration of the Tolman–Oppenheimer–Volkoff equations, from which we obtain, beyond the standard relations for the masses and radii of protoneutron stars as functions of the central density, new results of these quantities as functions of temperature. Our predictions include: the determination of an absolute value for the limiting mass of protoneutron stars; new structural aspects on the nuclear matter phase transition via the behavior of the specific heat and, through the inclusion of quark degrees of freedom, the properties of a hadron-quark phase transition and hybrid protoneutron stars

scholarly journals Nuclear phase transition and thermodynamic instabilities in dense nuclear matter

2018 ◽  
Vol 182 ◽  
pp. 03007
Author(s):  
A. Lavagno
Keyword(s):  
Phase Transition ◽  
Nuclear Matter ◽  
Gas Phase ◽  
Degrees Of Freedom ◽  
Baryon Density ◽  
Hadronic Matter ◽  
Mechanical Instability ◽  
Dense Nuclear Matter ◽  
Nuclear Phase ◽  
Matter Phase

We study the presence of thermodynamic instabilities in a nuclear medium at finite temperature and density where nuclear phase transitions can take place. Such a phase transition is characterized by pure hadronic matter with both mechanical instability (fluctuations on the baryon density) that by chemical-diffusive instability (fluctuations on the electric charge concentration). Similarly to the liquid-gas phase transition, the nucleonic and the Δ-matter phase have a different isospin density in the mixed phase. In the liquid-gas phase transition, the process of producing a larger neutron excess in the gas phase is referred to as isospin fractionation. A similar effects can occur in the nucleon-Δ matter phase transition due essentially to a Δ- excess in the Δ-matter phase in asymmetric nuclear matter. In this context we also discuss the relevance of Δ-isobar and hyperon degrees of freedom in the bulk properties of the protoneutron stars at fixed entropy per baryon, in the presence and in the absence of trapped neutrinos.

PHASE TRANSITION PATTERNS OF NUCLEAR MATTER BASED ON EXTENDED LINEAR SIGMA MODEL

2013 ◽  
Vol 22 (11) ◽  
pp. 1350077 ◽  
Author(s):  
TRAN HUU PHAT ◽  
NGUYEN TUAN ANH ◽  
PHUNG THI THU HA
Keyword(s):  
Phase Transition ◽  
Phase Transitions ◽  
Nuclear Matter ◽  
Degrees Of Freedom ◽  
Sigma Model ◽  
Chemical Potential ◽  
Linear Sigma Model ◽  
Baryon Chemical Potential ◽  
Chiral Phase ◽  
The Relationship

We study systematically various types of phase transitions in nuclear matter at finite temperature T and baryon chemical potential μ based on the extended linear sigma model with nucleon degrees of freedom. It is shown that there are three types of phase transitions in nuclear matter: the chiral symmetry nonrestoration (SNR) at high temperature, the well-known liquid–gas (LG) phase transition at sub-saturation density and the Lifshitz phase transition (LPT) from the fully-gapped state to the state with Fermi surface. Their phase diagrams are established in the (T, μ)-plane and their physical properties are investigated in detail. The relationship between the chiral phase transition and the LG phase transition in nuclear matter is discussed.

scholarly journals Self-energy of decuplet baryons in nuclear matter

1997 ◽  
Vol 404 (1-2) ◽  
pp. 108-114 ◽  
Author(s):  
S.M. Ouellette ◽  
Ryoichi Seki
Keyword(s):  
Nuclear Matter ◽  
Self Energy

Nucleon self-energy in relativistic nuclear matter with pion ring series

1991 ◽  
Vol 43 (4) ◽  
pp. 1958-1966 ◽  
Author(s):  
Hong Jung ◽  
Gerald A. Miller
Keyword(s):  
Nuclear Matter ◽  
Self Energy

scholarly journals Excitation of color degrees of freedom of nuclear matter and J/ψ suppression

2001 ◽  
Vol 11 (4) ◽  
pp. 457-465 ◽  
Author(s):  
J. Hüfner ◽  
B.Z. Kopeliovich ◽  
A. Polleri
Keyword(s):  
Nuclear Matter ◽  
Degrees Of Freedom

Pion degrees of freedom in nuclear matter

1990 ◽  
Vol 192 (4-6) ◽  
pp. 179-437 ◽  
Author(s):  
A.B. Migdal ◽  
E.E. Saperstein ◽  
M.A. Troitsky ◽  
D.N. Voskresensky
Keyword(s):  
Nuclear Matter ◽  
Degrees Of Freedom
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