Dispersion relations for the P-odd multipole amplitudes of the process. gamma. N. -->. N. pi
Journal Article
·
· Sov. J. Nucl. Phys. (Engl. Transl.); (United States)
OSTI ID:5470536
On the basis of dispersion relations for the invariant amplitudes with definite crossing properties and an approximation in which the effects of CP violation are neglected, dispersion relations are obtained for the P-odd multipole amplitudes of pion photoproduction on nucleons. It is shown that the Born part of the amplitudes for photoproduction of neutral pions on nucleons vanishes in this approximation. An analysis is made of the consequences of a resonance model in which the real parts of all the P-odd multipole amplitudes are generated by the imaginary parts of the amplitudes corresponding to excitation of the ..delta..(1233) resonance. Estimates are given for the P-odd effects in the reaction ..gamma..p..-->..p..pi../sup 0/ in the region of the ..delta..(1233) resonance.
- Research Organization:
- Khar'kov Physicotechnical Institute, Ukrainian Academy of Sciences
- OSTI ID:
- 5470536
- Journal Information:
- Sov. J. Nucl. Phys. (Engl. Transl.); (United States), Journal Name: Sov. J. Nucl. Phys. (Engl. Transl.); (United States) Vol. 30:2; ISSN SJNCA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
645202* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Electromagnetic Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
BARYON RESONANCES
BARYONS
BASIC INTERACTIONS
BOSONS
DELTA-1236 RESONANCES
DISPERSION RELATIONS
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
FERMIONS
HADRONS
INTERACTIONS
MESONS
N RESONANCES
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PHOTON-BARYON INTERACTIONS
PHOTON-HADRON INTERACTIONS
PHOTON-NUCLEON INTERACTIONS
PHOTOPRODUCTION
PIONS
PSEUDOSCALAR MESONS
RESONANCE PARTICLES
SCATTERING AMPLITUDES
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
BARYON RESONANCES
BARYONS
BASIC INTERACTIONS
BOSONS
DELTA-1236 RESONANCES
DISPERSION RELATIONS
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
FERMIONS
HADRONS
INTERACTIONS
MESONS
N RESONANCES
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PHOTON-BARYON INTERACTIONS
PHOTON-HADRON INTERACTIONS
PHOTON-NUCLEON INTERACTIONS
PHOTOPRODUCTION
PIONS
PSEUDOSCALAR MESONS
RESONANCE PARTICLES
SCATTERING AMPLITUDES