Asymmetries in phi photoproduction and the Okubo-Zweig-Iizuka violation - art. no. 055207

We study the vector-meson density matrix and the associated polarization as ymmetries in phi photoproduction near threshold. In order to study the Okub o-Zweig-Iizuka (OZI) violating processes, we consider the direct phi NN cou pling as well as the knockout processes arising from the nonvanishing ss se a quarks in the nucleon. The polarization asymmetries in phi meson decays a re found to be very useful to constrain the phi NN coupling constant. The h idden strangeness of the nucleon can also be studied by these asymmetries, but mostly at large \t\ region.