Symmetry, superconvergence, and sum rules for spectral functions

Apr, 1967
4 pages
Published in:
  • Phys.Rev.Lett. 18 (1967) 761-764

Citations per year

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Abstract: (APS)
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.