Symmetry, Superconvergence, and Sum Rules for Spectral Functions
- 1 May 1967
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 18 (18), 761-764
- https://doi.org/10.1103/physrevlett.18.761
Abstract
We discuss the convergence and the superconvergence properties of the invariant amplitudes which occur in suitable combinations of the propagator functions of the vector and the axial-vector currents, based on the use of symmetry arguments for the asymptotic behavior. The sum rules so obtained for the spectral functions are in good agreement with experiment.Keywords
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