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arXiv · hep-ph/9705409

KN Scattering and the Nucleon Strangeness Radius

M. J. Ramsey-Musolf·H. -W. Hammer
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Abstract

The leading non-zero electric moment of the nucleon strange-quark vector current is the mean square strangeness radius, $ $. We evaluate the lightest OZI-allowed contribution to $ $, arising from the kaon cloud, using dispersion relations. Drawing upon unitarity constraints as well as $K^{+}N$ scattering and $e^+e^-\to K\bar{K}$ cross section data, we find the structure of this contribution differs significantly from that suggested by a variety of QCD-inspired model calculations. In particular, we find evidence for a strong $ϕ$-meson resonance which may enhance the scale of kaon cloud contribution to an observable level.

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BibTeXRIS

M. J. Ramsey-Musolf, H. -W. Hammer. 1998-01-07. KN Scattering and the Nucleon Strangeness Radius. https://doi.org/10.1103/physrevlett.80.2539

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