The author reviews the present theoretical understanding of photons and hard
photoproduction processes, discussing the production of jets, light and heavy hadrons …

In the framework of the Dual Parton Model an approximation scheme to describe high
energy photoproduction processes is presented. Based on the distinction between direct …

We review the present theoretical and experimental status of heavy quark production in high-
energy collisions. In particular, we cover hadro-and photoproduction at fixed target …

Present data on the partonic content of the photon from LEP, TRISTAN and HERA
accelerators are reviewed and the essential aspects of the underlying ideas and methods …

Photon production via deep inelastic quark and gluon fragmentation is studied beyond the
leading perturbative order within the framework of a specific factorization scheme (DI S γ) …

We describe a next-to-leading-order calculation of the fully exclusive parton cross section at
next-to-leading order for the photoproduction of heavy quarks. We use our result to compute …

Photoproduction of heavy quarks and exclusive production of vector mesons in
ultraperipheral proton-nucleus and nucleus-nucleus collisions depend significantly on …

We discuss in detail the photon structure function beyond the leading logarithm
approximation. Of special concern is the factorization scheme and the hadronic input; we …

A search for single-top production, ep→ etX, has been made with the ZEUS detector at
HERA using an integrated luminosity of 130.1 pb− 1. Events from both the leptonic and …

The production of jets in low Q 2 ep scattering (photoproduction) and in low Q 2 ey+ ey−
scattering (γγ scattering) allows for testing perturbative QCD and for measuring the proton …