Even-wave harmonic-oscillator theory of baryonic states. V. Polarized photoproduction of single pions

Journal Article · Mon Jan 01 04:00:00 EST 1979 · Phys. Rev., D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.19.104· OSTI ID:6386007

Gupta, M; Sood, S K; Mitra, A N

A variant of the harmonic-oscillator (h.o.) model, termed the even-wave h.o. model (with quarks having h.o. interaction in even waves only), which was developed by Mitra and co-workers in a series of recent papers, is applied to the phenomenon of polarized photoproduction. The model, which predicts a ground state of (70,0/sup +/) and assumes and 8/sub d/ mixing angle (cottheta = ..sqrt..2) between 56 and 70 states, was recently found to give a good account of (i) the mass spectra of resonances, (ii) low-energy parameters such as G/sub A//G/sub V/, ..delta.. ..-->.. N..pi.. width, and NN..pi.. coupling constant, and (iii) resonance photocouplings, with no free parameters other than a universal spring constant (..cap omega.. approx. = 1 GeV/sup 2/). The present investigation reveals that this model agrees better with the data on polarized-targt asymmetry as well as dsigma/sub parallel/ and dsigma/sub perpendicular/ than does the conventional h.o. model.

• Research Organization: Department of Physics and Astrophysics, University of Delhi, Delhi-110007, India
• OSTI ID: 6386007
• Journal Information: Phys. Rev., D; (United States), Journal Name: Phys. Rev., D; (United States) Vol. 19:1; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645202* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Electromagnetic Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR DISTRIBUTION
BARYON RESONANCES
BARYONS
BASIC INTERACTIONS
BEAMS
BOSONS
COMPOSITE MODELS
DISTRIBUTION
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
FERMIONS
HADRONS
HARMONIC OSCILLATOR MODELS
INTERACTIONS
LIE GROUPS
MASS SPECTRA
MATHEMATICAL MODELS
MESONS
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PRODUCTION
PHOTON-BARYON INTERACTIONS
PHOTON-HADRON INTERACTIONS
PHOTON-NUCLEON INTERACTIONS
PHOTOPRODUCTION
PIONS
POLARIZED BEAMS
POLARIZED TARGETS
PRIMAKOFF EFFECT
PSEUDOSCALAR MESONS
QUARK MODEL
RESONANCE PARTICLES
SPECTRA
SU GROUPS
SU-6 GROUPS
SYMMETRY BREAKING
SYMMETRY GROUPS
TARGETS