Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1999-12-15
Nucl.Phys.Proc.Suppl. 82 (2000) 167-172
Physics
High Energy Physics
High Energy Physics - Phenomenology
7 pages, 2 ps figures, latex using psfig.sty and axodraw.sty. Presented at the International Conference on the Structure and I
Scientific paper
10.1016/S0920-5632(00)00149-3
The discussion on the production of prompt photons with pT of a few GeV in the tagged process ep -> e gamma X with small Q^2 (DIC process) at the HERA collider is presented. Photons produced in the forward (proton) direction are mainly originating from subprocesses involving interactions of the gluonic content of the exchanged photon. The large enhancement over the Born term (direct photon) is found up to a factor of 35 for a real photon and up to 5 for a virtual photon with a squared virtuality 1 GeV^2. It gives a possibility of extracting a gluonic density of the real and of the virtual photon. The BFKL approach to the description of the forward particle production is shortly discussed.
Krawczyk Maria
Zembrzuski Andrzej
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