A Relativistic Mean Field Theory for Nuclear Matter with {sigma},{delta} Meson Couplings at T {ne} 0

Journal Article · Thu Dec 02 00:00:00 EST 2004 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.1843625· OSTI ID:20630360

Bodmann, Bardo E.J. ^[1]; Mesquita, Alexandre; Vasconcellos, Cesar A.Z. ^[2]; Dillig, Manfred ^[3]

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1. Instituto de Fisica e Matematica, Universidade Federal de Pelotas, CEP 96010-900 Pelotas, Rio Grande do Sul (Brazil)
2. Instituto de Fisica, Universidade Federal do Rio Grande do Sul, CEP 91501-970 Porto Alegre, Rio Grande do Sul (Brazil)
3. Institut fuer Theoretische Physik III, der Universitaet Erlangen-Nuernberg, D91058 Erlangen (Germany)

Effects of temperature in hadron dense matter are studied within a generalized relativistic mean field approach based on the naturalness of the various coupling constants of the theory. The lagrangian density of the formulation contains the fundamental baryon octet and nonlinear self interaction components of the {sigma} and {delta} meson fields coupled to the baryons and to the {omega} and {rho} meson fields. We adjust the model parameters to describe bulk static properties of ordinary nuclear matter and neutron stars, in the framework of the Sommerfeld approximation, at the T {ne} 0 domain. Through integration of the TOV equations we obtain standard plots for the mass and mass-radius of protoneutron stars as a function of the central density and temperature. Our results indicate an absolute value for the protoneutron star limiting mass at low and intermediate temperature regimes.

• OSTI ID: 20630360
• Journal Information: AIP Conference Proceedings, Vol. 739, Issue 1; Conference: Joint meeting on QCD and QCP: 9. hadron physics and 7. relativistic aspects of nuclear physics, Rio de Janeiro (Brazil), 28 Mar - 3 Apr 2004; Other Information: DOI: 10.1063/1.1843625; (c) 2004 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYON OCTETS
COUPLING CONSTANTS
DENSITY
FIELD EQUATIONS
LAGRANGIAN FUNCTION
MEAN-FIELD THEORY
MESON-BARYON INTERACTIONS
MESON-MESON INTERACTIONS
NEUTRON STARS
NONLINEAR PROBLEMS
NUCLEAR MATTER
OMEGA-782 MESONS
QUANTUM FIELD THEORY
RELATIVISTIC RANGE
RESONANCE PARTICLES
REST MASS
RHO-770 MESONS