Exclusive photoproduction of Phi on proton in the quark-diquark model

We present predictions for exclusive photoproduction of a Phi meson on prot on at large transfer; where we use a quark-diquark structure model for the proton. Extrapolation from our results to lower transfers is comparable in magnitude with available data in that range. This may support the diquark m odel in its ability to provide, for that process, an appropriate link betwe en diffractive physics at low transfer and the standard semiperturbative ap proach of hard exclusive processes at very large transfer, in which the pro ton recovers its three-quark structure.