Elastic and proton-dissociative rho(0) photoproduction at HERA

Elastic and proton-dissociative rho0 photoproduction has been studied in ep interactions at HERA for photon-proton centre-of-mass energies in the range 50<W < 100 GeV and for |t| < 0:5 GeV^2, where t is the square of the four-momentum transfer at the proton vertex; the results on the proton-dissociative reaction are presented for masses of the dissociated proton system in the range M^2 < 0.1 W^2.