K* nucleon hyperon form factors and nucleon strangeness - art. no. 055206

A crucial input for recent meson hyperon cloud model estimates of the nucle on matrix element of the strangeness current is the nucleon-hyperon-K* (NYK *) form factors which regularize some of the arising loops. Prompted by new and forthcoming information on these form factors from hyperon-nucleon pot ential models, we analyze the dependence of the loop model results for the strange-quark observables on the NYK* form factors and couplings. We find, in particular, that the now generally favored soft N Lambda K* form factors can reduce the magnitude of the K* contributions in such models by more th an an order of magnitude, compared to previous results with hard form facto rs. We also discuss some general implications of our results for hadronic l oop models.