Status of Measurements and Interpretation of Total Real and Virtual Photon-Proton Cross Sections
Christoph Amelung (Physikalisches Institut der Universitaet Bonn) (for, the ZEUS, H1 Collaborations)
TL;DR
This paper reviews the current status of measurements and interpretations of proton structure functions, including F2, F2c, and FL, and discusses the transition from virtual to real photon exchange at low Q2.
Contribution
It provides a comprehensive summary of recent measurements, DGLAP fits, gluon density extraction, and the transition from virtual to real photons in proton structure studies.
Findings
Gluon density extracted from DGLAP fits aligns with F2c measurements.
Longitudinal structure function FL estimated through F2 extrapolation.
Transition from virtual to real photon exchange studied at low Q2.
Abstract
The status of measurements and interpretation of the proton structure function F2 is summarized. The measurements are subjected to DGLAP fits, from which the gluon density is extracted and a comparison to measurements of F2c is performed. The longitudinal structure function, FL, is extracted via an extrapolation of F2. At low Q2, the transition from virtual to real photon exchange is studied.
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