Published January 1986
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On the two-photon width of the delta(980)
Description
We evaluate the two photon width of the delta(980) using three-point function sum rules which are able to predict accurately the anomalous π0→γγ and non-anomalous delta→etaπ decay rates. The prediction, though smaller than previous results based on vector meson dominance, is still higher than the present Crystal Ball data. An analysis of the three-point function with one gluon exchange cannot support previous successful explanation of the data within the four-quark scheme. (author)
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Additional details
Publishing Information
- Imprint Pagination
- 17 p.
- Report number
- IC--86/12
INIS
- Country of Publication
- International Atomic Energy Agency (IAEA)
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 17064022
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Descriptors DEI
- DELTA-966 RESONANCES; GLUEBALLS; HADRONIC PARTICLE DECAY; PARTICLE WIDTHS; PIONS NEUTRAL; QUARK MODEL; RADIATIVE DECAY; SUM RULES; VECTOR DOMINANCE MODEL
- Descriptors DEC
- BOSONS; COMPOSITE MODELS; DECAY; ELEMENTARY PARTICLES; EQUATIONS; HADRONS; MATHEMATICAL MODELS; MESON RESONANCES; MESONS; PARTICLE DECAY; PARTICLE MODELS; PARTICLE PROPERTIES; PIONS; PSEUDOSCALAR MESONS; RESONANCE PARTICLES
Optional Information
- Notes
- 28 refs, 3 figs.