Quark delocalization, color screening model and nucleon-baryon scattering

We have previously interpreted the various large apparent violations of the naive Okubo-Zweiglizuka (OZI) rule found in many channels in pp annihilation at LEAR as evidence for an intrinsic polarized ss component of the nucleon wave function. The model is further supported by new data from LEAR and elsewhere. Here we discuss in more detail the possible form of the ss component of the nucleon wave function, interpret the new data and clarify the relative roles of strangeness shakeout and rearrangement, discuss whether alternative interpretations are still allowed by the new data, and propose more tests of the model.