Charmonium: The model

Journal Article · Thu Jun 01 04:00:00 EDT 1978 · Phys. Rev., D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.17.3090· OSTI ID:6842257

Eichten, E; Gottfried, K; Kinoshita, T; Lane, K D; Yan, T

A comprehensive treatment of the charmonium model of the psi family is presented. The model's basic assumption is a flavor-symmetric instantaneous effective interaction between quark color densities. This interaction describes both quark-antiquark binding and pair creation, and thereby provides a unified approach for energies below and above the threshold for charmed-meson production. If coupling to decay channels is ignored, one obtains the ''naive'' model wherein the dynamics is completely described by a single charmed-quark pair. A detailed description of this ''naive'' model is presented for the case where the instantaneous potential is a superposition of a linear and Coulombic term. A far more realistic picture is attained by incorporating those terms in the interaction that couple charmed quarks to light quarks. The coupled-channel formalism needed for this purpose is fully described. Formulas are given for the inclusive e/sup +/e/sup -/ cross section and for e/sup +/e/sup -/ annihilation into specific charmed-meson pairs. The influence of closed decay channels on psi states below charm threshold is investigated, with particular attention to leptonic and radiative widths.

• Research Organization: Laboratory of Nuclear Studies, Cornell University, Ithaca, New York 14853
• OSTI ID: 6842257
• Journal Information: Phys. Rev., D; (United States), Journal Name: Phys. Rev., D; (United States) Vol. 17:11; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645202* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Electromagnetic Interactions & Properties
645203 -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANNIHILATION
BASIC INTERACTIONS
BOSONS
BOUND STATE
CHARM PARTICLES
CHARMONIUM
COLOR MODEL
COMPOSITE MODELS
COUPLED CHANNEL THEORY
DECAY
ELECTRIC MOMENTS
ELECTROMAGNETIC INTERACTIONS
ELECTRON-POSITRON INTERACTIONS
ELEMENTARY PARTICLES
EQUATIONS
HADRONS
INTERACTIONS
LEPTON-LEPTON INTERACTIONS
LEPTONIC DECAY
LIE GROUPS
MATHEMATICAL MODELS
MATRIX ELEMENTS
MESON RESONANCES
MESONS
PAIR PRODUCTION
PARTICLE DECAY
PARTICLE INTERACTIONS
PARTICLE MODELS
POSTULATED PARTICLES
PSI RESONANCES
QUARK MODEL
QUARKS
RESONANCE PARTICLES
SU GROUPS
SU-3 GROUPS
SUM RULES
SYMMETRY BREAKING
SYMMETRY GROUPS
VECTOR MESONS
WEAK INTERACTIONS
WEAK PARTICLE DECAY