Pion electroproduction from nucleons, and neutral weak currents

Journal Article · Wed Feb 01 00:00:00 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), Vol. 27:2
• Country of Publication: United States
• Language: English

Related Subjects

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