Current Algebra beyond the Tree Approximation
- 15 October 1970
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 2 (8) , 1621-1629
- https://doi.org/10.1103/physrevd.2.1621
Abstract
A method is presented for constructing current-algebra amplitudes which satisfy (1) threshold theorems, (2) crossing symmetry, (3) approximate unitarity, and (4) cut-plane analyticity; and reduce to the usual tree approximation in the narrow-resonance limit. Pion-pion scattering is considered in detail to illustrate the method. A derivation of the Kawarabayashi-Suzuki-Riazuddin-Fayyazuddin relation is provided which makes no reference to vector-meson dominance.Keywords
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