Pion dynamics in the relativistic nuclear many-body problem
Pion interactions in the nuclear medium are studied using renormalizable relativistic quantum field theories. Previous studies using pseudoscalar ..pi..N coupling encountered difficulties due to the large strength of the ..pi..NN vertex. These difficulties may be avoided by formulating renormalizable field theories with pseudovector ..pi..N coupling using techniques introduced by Weinberg and Schwinger. Calculations are performed for two specific models: the scalar-vector theory of Walecka, extended to include ..pi.. mesons in a non-chiral fashion, and the linear sigma-model with an additional neutral vector meson. The pion propagator is evaluated in the one-nucleon-loop approximation, which corresponds to a relativistic random-phase approximation built on the Hartree ground state. Virtual NN loops are included, and suitable renormalization techniques are employed. The local-density approximation is used to compare the threshold pion self-energy to the s-wave pion-nucleus optical potential. 18 references, 1 figure.
- Research Organization:
- Univ. of California, Santa Barbara
- OSTI ID:
- 5511981
- Report Number(s):
- CONF-821050-
- Journal Information:
- AIP Conf. Proc.; (United States), Journal Name: AIP Conf. Proc.; (United States) Vol. 57; ISSN APCPC
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
653003* -- Nuclear Theory-- Nuclear Reactions & Scattering
653007 -- Nuclear Theory-- Nuclear Models-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BOSONS
COUPLING
DYNAMICS
EFFECTIVE MASS
ELEMENTARY PARTICLES
ENERGY
ENERGY LEVELS
FIELD THEORIES
GROUND STATES
HADRON-HADRON INTERACTIONS
HADRONS
HARTREE-FOCK-BOGOLYUBOV THEORY
INTERACTIONS
KINETICS
MANY-BODY PROBLEM
MASS
MECHANICS
MESON-BARYON INTERACTIONS
MESON-NUCLEON INTERACTIONS
MESONS
NUCLEAR REACTION KINETICS
NUMERICAL SOLUTION
OPTICAL MODELS
PARTIAL WAVES
PARTICLE INTERACTIONS
PION-NUCLEON INTERACTIONS
PIONS
POTENTIALS
PROPAGATOR
PSEUDOSCALAR MESONS
PSEUDOVECTOR COUPLING
QUANTUM FIELD THEORY
REACTION KINETICS
RENORMALIZATION
S WAVES
SELF-ENERGY
THRESHOLD ENERGY