Inelastic photoproduction of. omega. and rho/sup + -/mesons

We report measurements of inelastic photoproduction of ..omega.. and rho/sup + -/mesons from hydrogen and deuterium at incident photon energies in the range 7.5-10.5 GeV. For ..omega delta.. and rho/sup -/..delta../sup + +/ production differential cross sections dsigma/dt' and spin density matrices are presented. For higher missing masses the cross sections dsigma/dM/sub X//sup 2/ and invariant structure functions F(x) are also given. The data are compared to a one-pion-exchange model. We conclude that pion exchange is dominant for inelastic ..omega.. photoproduction, but unimportant for rho/sup + -/during annealing, even though the resistively determined transport scattering time increased by a factor of 7.8 during annealing. Orbital depairing was found to follow a relation zeta = zeta/sub 0/ + ..cap alpha..H/sup 2/ and to increase with annealing in a manner expected from the change in mean free path determined from measurements of H/sub cnu/.