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Spectral Content of Isoscalar Nucleon Form Factors

Authors
  • Hammer, H. -W.
  • Ramsey-Musolf, M. J.
Type
Published Article
Publication Date
Jul 16, 1999
Submission Date
Dec 05, 1998
Identifiers
DOI: 10.1103/PhysRevC.60.045205
arXiv ID: hep-ph/9812261
Source
arXiv
License
Unknown
External links

Abstract

The nucleon strange vector and isoscalar electromagnetic form factors are studied using a spectral decomposition. The K\bar{K} contribution to the electric and magnetic radii as well as the magnetic moment is evaluated to all orders in the strong interaction using an analytic continuation of experimental KN scattering amplitudes and bounds from unitarity. The relationship between non-resonant and resonant K\bar{K} contributions to the form factors is demonstrated, and values for the vector and tensor \phi N\bar{N} couplings are derived. The K\bar{K} spectral functions are used to evaluate the credibility of model calculations for the strange quark vector current form factors.

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