Published 2007 | Version v1
Journal article Metadata-only

A dispersive approach to pion photo- and electroproduction

Creators

  • 1. Institut fuer Kernphysik, Johannes-Gutenberg-Universitaet, Mainz (Germany)
  • 2. Dipartimento di Fisica Nucleare e Teorica, Universita degli Studi di Pavia and INFN, Sezione di Pavia, Pavia (Italy)

Description

The relativistic amplitudes of pion photo- and electroproduction are calculated by dispersion relations at constant t. Several sum rules and low-energy theorems for the threshold amplitudes are investigated within this technique. The continuation of the amplitudes to sub-threshold kinematics is shown to provide a unique framework to derive the low-energy constants of chiral perturbation theory by global properties of the excitation spectrum. (author)

Additional details

Publishing Information

Journal Title
Few-Body Systems
Journal Volume
41
Journal Issue
1-2
Journal Page Range
p. 13-29
ISSN
0177-7963
CODEN
FBSYEQ

INIS

Country of Publication
Austria
Country of Input or Organization
Austria
INIS RN
39039183
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Descriptors DEI
CHIRALITY; DISPERSION RELATIONS; ELECTROPRODUCTION; EXCITATION; PERTURBATION THEORY; PHOTOPRODUCTION; PIONS; SCATTERING AMPLITUDES; SUM RULES; THRESHOLD ENERGY
Descriptors DEC
AMPLITUDES; BASIC INTERACTIONS; BOSONS; ELECTROMAGNETIC INTERACTIONS; ELEMENTARY PARTICLES; ENERGY; ENERGY-LEVEL TRANSITIONS; EQUATIONS; HADRONS; INTERACTIONS; MESONS; PARTICLE INTERACTIONS; PARTICLE PRODUCTION; PARTICLE PROPERTIES; PSEUDOSCALAR MESONS