Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2000-11-06
Phys.Rept. 345 (2001) 265-450
Physics
High Energy Physics
High Energy Physics - Phenomenology
latex, 220 pages, 195 ps figures; extended and updated version of hep-ph/9806291; to appear in Physics Reports
Scientific paper
10.1016/S0370-1573(00)00105-8
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 are pointed out. Results of the unpolarized photon structure function F_2 from DIS_{e gamma} experiments and on large p_T jet production processes in the resolved gamma-gamma collisions are presented for both real and virtual photons. The results of analysis of the hadronic final state accompanying the DIS_{e gamma} measurements, showing some discrepancies with the Monte Carlo models, are collected together and presented as a separate issue. Also results on the DIS_{e gamma} with leptonic final states are shown. The results from resolved real and virtual photon processes at HERA collider based on the single and double jet events, also charged particles and prompt photons, are presented. In the context of virtual photon processes the data for forward jet and forward particle production are included. In addition a short presentation of the recent data on the heavy quark content of the photon is given. Related topics - the polarized (spin dependent) structure functions for the real and virtual photon, the structure function of the electron and the photonic content of the proton are also shortly mentioned.
Krawczyk Maria
Staszel Magdalena
Zembrzuski Andrzej
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