TL;DR
This paper reviews recent experimental results from HERA on the structure of the photon, focusing on aspects explainable by perturbative QCD, to enhance understanding of photon behavior at high energies.
Contribution
It provides a comprehensive review of photon structure measurements at HERA, emphasizing perturbative QCD insights and recent experimental findings.
Findings
Photon structure functions measured at HERA
Evidence supporting perturbative QCD predictions
Enhanced understanding of photon parton distributions
Abstract
At HERA, the electron-proton collider at DESY, Hamburg, the large flux of almost on-shell photons accompanying the lepton beam is being used to shed new light on the structure of the photon. Recent results are reviewed and discussed, with emphasis on those aspects of the photon's nature which should be understandable using perturbative QCD.
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