Parity violation in the capture np. -->. d. gamma. : A field-theoretic approach and relativistic effects

Journal Article · Mon Mar 01 04:00:00 EST 1982 · Sov. J. Nucl. Phys. (Engl. Transl.); (United States)

OSTI ID:6863705

Kopeliovich, V B

A field-theoretic approach is developed to study the problem of parity violation in the radiative capture of a neutron by a proton, in order to investigate the role of relativistic effects in the observables in this process. The deuteron and the scattering state are described by Bethe-Salpeter vertex functions satisfying certain symmetry relations due to the generalized Pauli principle. In the case of circular polarization of the photons the isovector relativistic contributions violating the Siegert theorem, which are proportional to the photon energy, cannot noticeably affect the existing discrepancy between the observed magnitude of the effect and the theoretical estimates, though they are important in models with neutral currents, where the parity-violating weak ..pi..NN constant is large. It is shown that an electroweak effect similar to that found in the capture np..-->..d..gamma.. also occurs in the case of bremsstrahlung in nucleon-nucleon scattering (in terms approx...omega../sup 0/ in the photon energy).

• Research Organization: Nuclear Research Institute, USSR Academy of Sciences
• OSTI ID: 6863705
• Journal Information: Sov. J. Nucl. Phys. (Engl. Transl.); (United States), Journal Name: Sov. J. Nucl. Phys. (Engl. Transl.); (United States) Vol. 35:3; ISSN SJNCA
• Country of Publication: United States
• Language: English

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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYON-BARYON INTERACTIONS
BETHE-SALPETER EQUATION
CAPTURE
CHARGED PARTICLES
DEUTERONS
ELECTROMAGNETIC RADIATION
EQUATIONS
FIELD THEORIES
FUNCTIONS
GAMMA RADIATION
HADRON-HADRON INTERACTIONS
INTERACTIONS
INVARIANCE PRINCIPLES
IONIZING RADIATIONS
NUCLEON-NUCLEON INTERACTIONS
P INVARIANCE
PARITY
PARTICLE INTERACTIONS
PARTICLE PROPERTIES
POLARIZATION
PROTON-NEUTRON INTERACTIONS
PROTON-NUCLEON INTERACTIONS
QUANTUM FIELD THEORY
RADIATIONS
VERTEX FUNCTIONS