Momentum dependence of the [rho]-[omega] mixing amplitude in a hadronic model

Journal Article · Tue Jun 01 04:00:00 EDT 1993 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.47.R2462· OSTI ID:6462496

Piekarewicz, J ^[1]; Williams, A G ^[2]

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1. Supercomputer Computations Research Institute, Florida State University, Tallahassee, Florida 32306 (United States)
2. Department of Physics and Supercomputer Computations Research Institute, Florida State University, Tallahassee, Florida 32306 (United States)

We calculate the momentum dependence of the [rho]-[omega] mixing amplitude in a purely hadronic model. The basic assumption of the model is that the mixing amplitude is generated by [ital N[bar N]] loops and thus driven entirely by the neutron-proton mass difference. The value of the amplitude at the [omega]-meson point is expressed in terms of only the [ital NN][omega] and [ital NN][rho] coupling constants. Using values for these couplings constrained by empirical two-nucleon data we obtain a value for the mixing amplitude in agreement with experiment. Extending these results to the spacelike region, we find a [rho]-[omega] contribution to the [ital NN] interaction that is strongly suppressed and opposite in sign relative to the conventional contribution obtained from using the constant on-shell value for the mixing amplitude.

• DOE Contract Number: FC05-85ER25000; FG05-92ER40750; FG05-86ER40273
• OSTI ID: 6462496
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 47:6; 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
BARYON-BARYON INTERACTIONS
BOSON-EXCHANGE MODELS
BOSONS
CONFIGURATION MIXING
COUPLING CONSTANTS
ELEMENTARY PARTICLES
HADRON-HADRON INTERACTIONS
HADRONS
INTERACTIONS
MATHEMATICAL MODELS
MESONS
NUCLEAR FORCES
NUCLEON-NUCLEON INTERACTIONS
OMEGA-783 MESONS
PARTICLE INTERACTIONS
PARTICLE MODELS
PERIPHERAL MODELS
RHO-770 MESONS
VECTOR MESONS