Photoproduction of delta and Roper resonances in the cloudy bag model

Journal Article · Thu Dec 31 23:00:00 EST 1987 · Phys. Rev. D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.37.89· OSTI ID:5511086

Bermuth, K; Drechsel, D; Tiator, L; Seaborn, J B

The photoproduction of delta and Roper resonances has been calculated within the framework of the cloudy bag model. Two alternative formulations, the original pseudoscalar surface coupling and the pseudovector volume coupling of pions, have been used, and the results are compared. The helicity amplitudes are in fair agreement with experimental data, the prediction for the small E/sub 1+//M/sub 1+/ ratio for delta production is -1.8% for a bag radius of 1 fm and pseudovector coupling.

• Research Organization: Institut Kernphysik, Universitaet Mainz, 6500 Mainz, Federal Republic of Germany
• OSTI ID: 5511086
• Journal Information: Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 37:1; 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 MOMENTUM
BAG MODEL
BANACH SPACE
BARYON RESONANCES
BARYONS
BASIC INTERACTIONS
BOSONS
COMPOSITE MODELS
COUPLING
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
ENERGY-LEVEL TRANSITIONS
EXTENDED PARTICLE MODEL
FERMIONS
FUNCTIONS
HADRONS
HELICITY
HILBERT SPACE
INTERACTIONS
ISOSPIN
M1-TRANSITIONS
MATHEMATICAL MODELS
MATHEMATICAL SPACE
MATRIX ELEMENTS
MESONS
MULTIPOLE TRANSITIONS
N RESONANCES
N-1470 RESONANCES
NUCLEON-NUCLEON POTENTIAL
PARTICLE MODELS
PARTICLE PRODUCTION
PARTICLE PROPERTIES
PHOTOPRODUCTION
PIONS
POTENTIALS
PSEUDOSCALAR MESONS
PSEUDOVECTOR COUPLING
QUARK MODEL
QUASI PARTICLES
RESONANCE PARTICLES
SKYRME POTENTIAL
SOLITONS
SPACE
SPIN
WAVE FUNCTIONS