1999•arXiv (Cornell University)Open access

Interpreting virtual photon interactions in terms of parton distribution functions

J. Chýla, M. Taševský

Abstract

Interactions of virtual photons are analyzed in terms of photon structure. It is argued that the concept of parton distribution functions is phenomenologically very useful even for highly virtual photons involved in hard collisions. The role of longitudinal photons for proper interpretation of jet cross--sections in the region of moderate virtualities accessible at HERA is investigated.

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Key concepts: HERA, Parton, Virtual particle, Photon, Physics, Particle physics, Jet (fluid), Interpretation (philosophy)