Medium-energy N. pi pi. dynamics. II. Rescattering corrections to the isobar model

Journal Article · Sat Sep 01 04:00:00 EDT 1979 · Phys. Rev., D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.20.1131· OSTI ID:5963608

Aitchison, I J.R.; Brehm, J J

A new parametrization of the isobar-model type is proposed for N..pi pi.. final states. It incorporates the major subenergy-dependent variations induced by unitarity (rescattering) corrections to the conventional nonunitary isobar model. These corrections have been calculated in J/sup P/ waves 1/2/sup +/, 1/2/sup -/, 3/2/sup +/, and 3/2/sup -/ using the dynamical theory based on subenergy unitarity and analyticity recently developed by the authors. All the corrections vary relatively smoothly with subenergy. It is argued that this result implies that the conclusions of the existing nonunitary fits will not be seriously modified by the inclusion of the rescattering corrections. There are, however, some significant subenergy variations. In all the important cases the detailed results exhibit one of two distinctive subenergy effects, which are interpreted physically; each effect occurs in a systematic fashion and can be succinctly parametrized. Some of the variations may be detectable with improved statistics.

• Research Organization: Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627
• OSTI ID: 5963608
• Journal Information: Phys. Rev., D; (United States), Journal Name: Phys. Rev., D; (United States) Vol. 20:5; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645204* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Strong Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYONS
CORRECTIONS
ELEMENTARY PARTICLES
ENERGY DEPENDENCE
EQUATIONS
FERMIONS
HADRON-HADRON INTERACTIONS
HADRONS
INTEGRAL EQUATIONS
INTERACTIONS
ISOBAR MODEL
ISOSPIN
MANY-BODY PROBLEM
MATHEMATICAL MODELS
MESON-MESON INTERACTIONS
NUCLEONS
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PROPERTIES
PION-PION INTERACTIONS
QUANTUM NUMBERS
RESCATTERING
S CHANNEL
SCATTERING
THREE-BODY PROBLEM
UNITARITY