Nucleon Strangeness and Unitarity

Abstract

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.

Revtex, 35 pages, 11 Postscript figures, uses epsf.sty, rotate.sty

References in corpus (1)

• Strange Hadronic Loops of the Proton: A Quark Model Calculation

Cited by in corpus (17)

• The Strange Quark Contribution to the Proton's Magnetic Moment
• Parity-Violating Electron Scattering and Neucleon Structure
• Dispersion-theoretical analysis of the electromagnetic form factors of the nucleon: Past, present and future
• K\bar{K}-Continuum and Isoscalar Nucleon Form Factors
• Chiral Symmetry and the Nucleon's Vector Strangeness Form Factors
• Spectral Content of Isoscalar Nucleon Form Factors
• Static properties of chiral models with SU(3) group structure
• Parity-Violating Excitation of the Δ(1232): Hadron Structure and New Physics
• K^* Mesons and Nucleon Strangeness
• KN Scattering and the Nucleon Strangeness Radius
• Form factors and other measures of strangeness in the nucleon
• Strangeness content of the nucleon in quasielastic neutrino-nucleus reactions
• Nucleon Vector Strangeness Form Factors: Multi-pion Continuum and the OZI Rule
• Helicity asymmetries in neutrino-nucleus interactions
• Long distance effects and strangeness in the nucleon
• Probing Proton Strangeness with Time-Like Virtual Compton Scattering
• Strange Vector Form Factor of Kaons