Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1999-03-16
Phys.Rev. C60 (1999) 045204; Erratum-ibid. C62 (2000) 049902
Physics
High Energy Physics
High Energy Physics - Phenomenology
17 pages, Latex, 1 PS figure included with epsf.sty
Scientific paper
10.1103/PhysRevC.60.045204
We analyse the isoscalar vector current form factors of the nucleon using dispersion relations. In addition to the usual vector meson poles, we account for the K\bar{K}-continuum contribution by drawing upon a recent analytic continuation of KN scattering amplitudes. For the Pauli form factor all strength in the \phi region is already given by the continuum contribution, whereas for the Dirac form factor additional strength in the \phi region is required. The pertinent implications for the leading strangeness moments are demonstrated as well. We derive a reasonable range for the leading moments which is free of assumptions about the asymptotic behavior of the form factors. We also determine the \phiNN coupling constants from the form factor fits and directly from the K\bar{K} -> N\bar{N} partial waves and compare the resulting values.
Hammer Hans-Werner
Ramsey-Musolf Michael. J.
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