Relativistic nuclear matter with alternative derivative coupling models

Journal Article · Fri Mar 31 23:00:00 EST 1995 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.51.2188· OSTI ID:6587070

Delfino, A; Coelho, C T; Malheiro, M ^[1]

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1. Instituto de Fisica-Universidade Federal Fluminense, Outeiro de Sao Joao Batista s/n, 24020-004 Centro, Niteroi, Rio de Janeiro (Brazil)

Effective Lagrangians involving nucleons coupled to scalar and vector fields are investigated within the framework of relativistic mean-field theory. The study presents the traditional Walecka model and different kinds of scalar derivative couplings suggested by Zimanyi and Moszkowski. The incompressibility (presented in an analytical form), scalar potential, and vector potential at the saturation point of nuclear matter are compared for these models. The real optical potential for the models are calculated and one of the models fits well the experimental curve from [minus]50 to 400 MeV while also giving a soft equation of state. By varying the coupling constants and keeping the saturation point of nuclear matter approximately fixed, only the Walecka model presents a first order phase transition for finite temperature at zero density.

• OSTI ID: 6587070
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 51:4; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

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663300 -- Nuclear Reactions & Scattering
General-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYONS
COUPLING
COUPLING CONSTANTS
ELEMENTARY PARTICLES
ENERGY RANGE
EQUATIONS
EQUATIONS OF STATE
FERMIONS
FUNCTIONS
HADRONS
LAGRANGIAN FUNCTION
MATHEMATICAL MODELS
MATTER
MEAN-FIELD THEORY
NUCLEAR MATTER
NUCLEAR MODELS
NUCLEONS
OPTICAL MODELS
PHASE TRANSFORMATIONS
RELATIVISTIC RANGE
SCALAR FIELDS
VECTOR FIELDS
WALECKA MODEL