Strange Form Factors, the a-Term and Strange Quark Distributions in the Gross-Neveu Model

For NC -+ 00 the structure function of physical fermions in the Gross-Neveu model is of pure valence type. Nevertheless several strange form factors of u-quarks, including the induced magnetic moment and the a-term acquire substantial O(Ni) contributions from virtual ss pairs. Those arise from matrix elements which are off-diagonal in Fock space, i.e. they do not have a simple interpretation in terms of the quark distributions. It is shown that, under certain circumstances, a similar behavior in &CDs+1 is conceivable. Submitted to Physics Letters B. * Supported in part by a grant from Alexander von Humboldt-Stiftung and in part by the Department of Energy under contract DE-AC03-76SF00515.