Two-loop calculations with vertex corrections in the Walecka model

Journal Article · Wed Feb 01 04:00:00 EST 1995 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.51.969· OSTI ID:6603454

Serot, B D ^[1]; Tang, H ^[2]

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1. Physics Department and Nuclear Theory Center, Indiana University, Bloomington, Indiana 47405 (United States)
2. Department of Physics, The Ohio State University, Columbus, Ohio 43210 (United States)

Two-loop corrections with scalar and vector form factors are calculated for nuclear matter in the Walecka model. The on-shell form factors are derived from vertex corrections within the framework of the model and are highly damped at large spacelike momenta. The two-loop corrections are evaluated first by using the one-loop parameters and mean fields and then by refitting the total energy/baryon to empirical nuclear matter saturation properties. The modified two-loop corrections are significantly smaller than those computed with bare vertices. Contributions from the anomalous isoscalar form factor of the nucleon are included for the first time. The effects of the implicit density dependence of the form factors, which arise from the shift in the baryon mass, are also considered. Finally, necessary extensions of these calculations are discussed.

• DOE Contract Number: FG02-87ER40365
• OSTI ID: 6603454
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 51:2; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

663110* -- General & Average Properties of Nuclei & Nuclear Energy Levels-- (1992-)
663120 -- Nuclear Structure Models & Methods-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CORRECTIONS
DENSITY
FORM FACTORS
FUNCTIONS
MATHEMATICAL MODELS
MATTER
NUCLEAR MATTER
NUCLEAR MODELS
PARTICLE PROPERTIES
PHYSICAL PROPERTIES
SCALARS
TENSORS
VECTORS
VERTEX FUNCTIONS
WALECKA MODEL