Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1996-10-18
Phys.Rev.D55:2741,1997; Erratum-ibid.D62:079901,2000
Physics
High Energy Physics
High Energy Physics - Phenomenology
Revtex, 35 pages, 11 Postscript figures, uses epsf.sty, rotate.sty
Scientific paper
10.1103/PhysRevD.55.2741 10.1103
The strange-quark vector current form factors of the nucleon are analyzed within the framework of dispersion relations. Particular attention is paid to contributions made by $K\bar{K}$ intermediate states to the form factor spectral functions. It is shown that, when the $K\bar{K}\to N\bar{N}$ amplitude is evaluated in the Born approximation, the $K\bar{K}$ contributions are identical to those arising from a one-loop calculation and entail a serious violation of unitarity. The mean square strangeness radius and magnetic moment are evaluated by imposing unitarity bounds on the kaon-nucleon partial wave amplitudes. The impact of including the kaon's form factor in the dispersion integrals is also evaluated.
Drechsel Dieter
Hammer Hans-Werner
Musolf M. J.
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