Photoproduction Off Nuclei, Part II: Particle and Jet Production

Abstract

High energy multiparticle photoproduction off nuclear targets is studied. The photon is assumed to interact in direct scattering processes or as a resolved $q\bar{q}$-state according to the Generalized Vector Dominance Model. In the description of resolved interactions multiple soft and hard processes in each $q\bar{q}$--nucleon interaction are taken into consideration. The model, formulated within the framework of the two-component Dual Parton Model, is shown to agree with hadron production data from real and weakly virtual photon-nucleus interactions. Differences between multiparticle production in photon-nucleus and hadron-nucleus interactions and features of jet production in photon-nucleus collisions at HERA-energies are discussed.

Comments: 19 pages, LaTex, 16 figures, final version, to appear in Phys. Rev. D