Conference paper

Nucleon structure from pion electro-production experiments at MAMI

S. Širca (A1 Collaboration at MAMI) ; Dept. of Physics, University of Ljubljana, Jadranska 19, 1000 Ljubljana, Slovenia and Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia

Abstract

Recent pion electro-production experiments of the A1 Collaboration at MAMI are presented. The threshold data in the p(e,e′p)π 0 and d(e,e′d)π 0 channels reveal the chiral dynamics of the pion-nucleon system at low energies. Measurements of the neutral channel in the ∆ region address the issue of the pion cloud, while the p(e,e′π +)n channel gives access to the axial structure of the nucleon.

Keywords

threshold pion electro-production; nucleon-delta transition; pion cloud; axial form-factor; chiral perturbation theory

Hrčak ID:

305614

URI

https://hrcak.srce.hr/305614

Publication date:

1.3.2004.

Article data in other languages: croatian

Visits: 360 *