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Title: Pion electroproduction from nucleons, and neutral weak currents

Abstract

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.

Authors:
Publication Date:
Research Org.:
Khar'kov Physicotechnical Institute, Ukrainian Academy of Sciences
OSTI Identifier:
6500098
Resource Type:
Journal Article
Journal Name:
Sov. J. Nucl. Phys. (Engl. Transl.); (United States)
Additional Journal Information:
Journal Volume: 27:2
Country of Publication:
United States
Language:
English
Subject:
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

Citation Formats

Rekalo, M P. Pion electroproduction from nucleons, and neutral weak currents. United States: N. p., 1978. Web.
Rekalo, M P. Pion electroproduction from nucleons, and neutral weak currents. United States.
Rekalo, M P. 1978. "Pion electroproduction from nucleons, and neutral weak currents". United States.
@article{osti_6500098,
title = {Pion electroproduction from nucleons, and neutral weak currents},
author = {Rekalo, M P},
abstractNote = {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.},
doi = {},
url = {https://www.osti.gov/biblio/6500098}, journal = {Sov. J. Nucl. Phys. (Engl. Transl.); (United States)},
number = ,
volume = 27:2,
place = {United States},
year = {Wed Feb 01 00:00:00 EST 1978},
month = {Wed Feb 01 00:00:00 EST 1978}
}