KN Scattering and the Nucleon Strangeness Radius

Abstract

The leading non-zero electric moment of the nucleon strange-quark vector current is the mean square strangeness radius, $<r_s^2>$. We evaluate the lightest OZI-allowed contribution to $<r_s^2>$, 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 $\varphi$-meson resonance which may enhance the scale of kaon cloud contribution to an observable level.

4 pages, RevTex, 1 PS figure, uses epsf.sty, revised to improve clarity, results unchanged

References in corpus (2)

• Measurement of the Proton's Neutral Weak Magnetic Form Factor
• Nucleon Vector Strangeness Form Factors: Multi-pion Continuum and the OZI Rule

Cited by in corpus (15)

• The Strange Quark Contribution to the Proton's Magnetic Moment
• The SAMPLE Experiment and Weak Nucleon Structure
• Nucleon Structure and Parity-Violating Electron Scattering
• Strange magnetism in the nucleon
• Strange chiral nucleon form factors
• K\bar{K}-Continuum and Isoscalar Nucleon Form Factors
• Parity Violation in Elastic Electron-Nucleon Scattering: Strangeness Content in the Nucleon
• Strange Asymmetries in the Nucleon Sea
• Spectral Content of Isoscalar Nucleon Form Factors
• What Do We Know About the Strange Magnetic Radius?
• K* nucleon hyperon form factors and nucleon strangeness
• Can the meson cloud explain the nucleon strangeness?
• Baryon form factors: Model-independent results
• Long distance effects and strangeness in the nucleon
• Strange Vector Form Factor of Kaons