Pion electroproduction from nucleons, and neutral weak currents

Journal Article · Wed Feb 01 04:00:00 EST 1978 · Sov. J. Nucl. Phys. (Engl. Transl.); (United States)

OSTI ID:6500098

Rekalo, M P

The general structure of the differential cross section of pion electroproduction from nucleons is obtained with account taken of the contribution of the interference, brought about by the interaction of the weak neutral currents of the electron and nucleon, between the amplitudes of the electromagnetic mechanism and the weak mechanism. Formulas are obtained for different asymmetries introduced into the angular distribution of the pions by the polarization of the initial nucleon, in the case of unpolarized and longitudinally polarized electrons. The amplitudes of the electromagnetic and weak mechanisms are calculated for the processes e+N..-->..e+N+..pi.. within the framework of the Born approximation for the pseudoscalar and pseudovector variants of the meson-nucleon interactions. These amplitudes are used to estimate the contribution of the weak mechanism near the threshold of the reactions e+N..-->..e+N+..pi... If the squared momentum transfers exceed 1 GeV/sup 2/, the difference between the cross sections for the production of neutral pions in scattering of electrons and positrons is larger by one order of magnitude than the difference between the cross sections for the production of charged pions.

• Research Organization: Khar'kov Physicotechnical Institute, Ukrainian Academy of Sciences
• OSTI ID: 6500098
• Journal Information: Sov. J. Nucl. Phys. (Engl. Transl.); (United States), Journal Name: Sov. J. Nucl. Phys. (Engl. Transl.); (United States) Vol. 27:2; ISSN SJNCA
• Country of Publication: United States
• Language: English

Related Subjects

645203* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ALGEBRAIC CURRENTS
ANGULAR DISTRIBUTION
ASYMMETRY
BASIC INTERACTIONS
BEAMS
BORN APPROXIMATION
BOSONS
COUPLING
CROSS SECTIONS
CURRENTS
DIFFERENTIAL CROSS SECTIONS
DISTRIBUTION
ELECTROMAGNETIC INTERACTIONS
ELECTRON-NUCLEON INTERACTIONS
ELECTROPRODUCTION
ELEMENTARY PARTICLES
HADRONS
INTERACTIONS
LEPTON-BARYON INTERACTIONS
LEPTON-HADRON INTERACTIONS
LEPTON-NUCLEON INTERACTIONS
MESONS
NEUTRAL CURRENTS
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PIONS
POLARIZED BEAMS
PSEUDOSCALAR MESONS
PSEUDOSCALARS
PSEUDOVECTOR COUPLING
WEAK NEUTRAL CURRENTS