“…Experiments at the Tevatron and at HERA have already examined a variety of these large t diffractive processes, the most inclusive of which is the double dissociation process γp → X Y which has been studied at HERA [3]. 2 The gaps-betweenjets process, in which systems X and Y are each required to contain at least one jet, have been studied both at the Tevatron [4][5][6][7] and at HERA [8,9]. Additionally, the vector meson production process, γp → V Y , in which the system X is a single vector meson, V , has been measured at HERA [10,11].…”