Published December 5, 1994 | Version v1
Journal article Metadata-only

Threshold two-pion photo- and electroproduction: More neutrals than expected

Creators

  • 1. Centre de Recherches Nucleaires et Universite Louis Pasteur de Strasbourg, Physique Theorique, BP 28Cr, F-67037 Strasbourg Cedex 2 (France)
  • 2. Physik Department T30, Technische Universitaet Muenchen, James Franck Strasse, W-85747 Garching (Germany)

Description

We present an exploratory study of two-pion photo- and electroproduction off the nucleon in the threshold region. To calculate the pertinent amplitudes, we make use of heavy baryon chiral perturbation theory. We show that due to finite chiral loops the production cross section for final states with two neutral pions is considerably enhanced. The experimental implications are briefly discussed. ((orig.))

Additional details

Publishing Information

Journal Title
Nuclear Physics. A
Journal Volume
580
Journal Issue
3
Journal Page Range
p. 475-499.
ISSN
0375-9474
CODEN
NUPABL

INIS

Country of Publication
Netherlands
Country of Input or Organization
Netherlands
INIS RN
26022782
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Resource subtype / Literary indicator
Numerical Data
Descriptors DEI
CHIRAL SYMMETRY; CHIRALITY; ELECTROPRODUCTION; ENERGY DEPENDENCE; EXCITATION FUNCTIONS; FEYNMAN DIAGRAM; FLAVOR MODEL; INTEGRAL CROSS SECTIONS; ISOSPIN; LAGRANGIAN FIELD THEORY; MATRIX ELEMENTS; MEV RANGE 100-1000; NEUTRONS; PAIR PRODUCTION; PERTURBATION THEORY; PHOTON-NEUTRON INTERACTIONS; PHOTON-PROTON INTERACTIONS; PHOTOPRODUCTION; PION-NUCLEON INTERACTIONS; PIONS MINUS; PIONS NEUTRAL; PIONS PLUS; PROTONS; SCATTERING AMPLITUDES; SYMMETRY BREAKING; THEORETICAL DATA
Descriptors DEC
AMPLITUDES; BARYONS; BASIC INTERACTIONS; BOSONS; CATIONS; CHARGED PARTICLES; COMPOSITE MODELS; CROSS SECTIONS; DATA; DIAGRAMS; ELECTROMAGNETIC INTERACTIONS; ELEMENTARY PARTICLES; ENERGY RANGE; FERMIONS; FIELD THEORIES; HADRON-HADRON INTERACTIONS; HADRONS; HYDROGEN IONS; HYDROGEN IONS 1 PLUS; INFORMATION; INTERACTIONS; IONS; MATHEMATICAL MODELS; MESON-BARYON INTERACTIONS; MESON-NUCLEON INTERACTIONS; MESONS; MEV RANGE; NUCLEONS; NUMERICAL DATA; PARTICLE INTERACTIONS; PARTICLE MODELS; PARTICLE PRODUCTION; PARTICLE PROPERTIES; PHOTON-BARYON INTERACTIONS; PHOTON-HADRON INTERACTIONS; PHOTON-NUCLEON INTERACTIONS; PIONS; PSEUDOSCALAR MESONS; QUANTUM FIELD THEORY; QUARK MODEL; SYMMETRY