Superconvergent sum rules and a multipole analysis of pion photoproduction on nucleons
The results of a multipole analysis of pion photoproduction on nucleons are used to investigate the validity of superconvergent sum rules. The anomalous magnetic moments of the nucleon are found to have the values kappa/sup S/ = -0.06 - 0.14 and kappa/sup P/ = 1.97 +- 0.15. It is shown that the total contribution of a large number of resonances differs little from the contribution of the single P/sub 33/(1232) resonance. The amplitudes for photoproduction of the P/sub 33/(1232) and F/sub 37/(1925) resonances are found to satisfy the relations E/sub 1*//M/sub 1*/ = -(M-m)/(3M+m) approx. =-0.063 and A/sub 3/sup +///B/sub 3/sup +// = -3m/2M approx. =% -0.73, in agreement with experiment. (AIP)
- Research Organization:
- Physico-technical Institute, Ukrainian Academy of Sciences
- OSTI ID:
- 7124319
- Journal Information:
- Sov. J. Nucl. Phys. (Engl. Transl.); (United States), Journal Name: Sov. J. Nucl. Phys. (Engl. Transl.); (United States) Vol. 24:1; ISSN SJNCA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
645206 -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Strong Interactions
Baryon No. = 1-- (-1987)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYON RESONANCES
BARYONS
BASIC INTERACTIONS
BOSONS
DELTA-1236 RESONANCES
DELTA-1950 RESONANCES
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
EQUATIONS
FERMIONS
GEV RANGE
GEV RANGE 01-10
HADRONS
INTERACTIONS
MAGNETIC MOMENTS
MESON RESONANCES
MESONS
MEV RANGE
MEV RANGE 100-1000
MULTIPOLES
N)RESONANCES
NUCLEONS
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PHOTON-BARYON INTERACTIONS
PHOTON-HADRON INTERACTIONS
PHOTON-NUCLEON INTERACTIONS
PHOTOPRODUCTION
PIONS
PSEUDOSCALAR MESONS
RESONANCE PARTICLES
SUM RULES
SUPERCONVERGENCE RELATIONS