Strange vector form factors of the nucleon

Abstract

A model combining vector meson dominance, \ensuremath{\omega}-\ensuremath{\varphi} mixing, and a kaon cloud contribution is used to estimate the strangeness vector form factors of the nucleon in the momentum range of the planned measurements at MIT-Bates and CEBAF. We compare our results with some other theoretical estimates and discuss the nucleon strangeness radius in models based on dynamically dressed, extended constituent quarks. For a quantitative estimate in the latter framework we use the Nambu--Jona-Lasinio model.