Quark-loop dynamics and meson decays
197220 pages
Published in:
- Nuovo Cim.A 11 (1972) 101-120
DOI:
Report number:
- DESY-72-3
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Abstract: (Springer)
From a set of lowest-order quark-loop diagrams for static mesic amplitudes involving vector and axial vector vertices, we determine the effective quark mass and the meson-quark-quark coupling constants for three types of quark models. These parameters are applied to evaluate certain mesic decays and theSU3 mass splitting of the 0− octet and 1− nonet, which serve as tests for the quark models. Adler’s low-energy theorem for the π0 → 2γ decay is derived in our approach without invoking the Adler-Schwinger anomaly. The test favors the Nambu-Han model of integrally charged quarks. Critical examinations of the underlying assumption of the quark-loop dominance are made, and a speculation on a physical model which allows such a situation will be proposed.- quark: mass
- mass: quark
- coupling constant: pi-quark-quark
- pi-quark-quark: coupling constant
- propagator
- symmetry: su(3)
- multiplet: mass difference
- mass difference: multiplet
- PCAC model
- current algebra
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