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Spectral Content of Isoscalar Nucleon Form Factors

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arxiv hep-ph/9812261 v3 pith:2JBEMGI4 submitted 1998-12-06 hep-ph nucl-th

classification hep-phnucl-th
keywords factorsformspectralvectorisoscalarmagneticnucleonstrange
verification ladder T0 review T1 audit T2 compute T3 formal
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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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  1. Baryon Form Factors

    hep-ph 2024-12 accept novelty 2.0 of 10

    A review of baryon form factors summarizing the authors' dispersion-theoretical fits, which yield r_p^E = 0.840 fm, r_p^M = 0.849 fm, and r_n^M = 0.864 fm.

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