Superconvergence relations in γN→πΔ(1236)
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1970-06-01
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Kloet, W. M.
Ragusa, S.
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Superconvergent amplitudes involving the isovector part of the photon in the process γN→πΔ(1236) are investigated. Assuming SU(3) symmetry for the ΔΔγ vertex, a relation is obtained between the ΔΔπ and NNπ couplings, which is consistent with the SU(6) limit. For the physical masses of Δ and N this results in gΔ++Δ++πo≈36. © 1970.
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Nuclear Physics, Section B, v. 19, n. 2, p. 645-652, 1970.