The Structure of the Virtual Photon
Claudia Glasman (University of Glasgow, representing the ZEUS, Collaboration)
TL;DR
This paper investigates the structure of virtual photons through dijet cross section measurements, demonstrating the necessity of a resolved photon component in QCD models up to high photon virtualities.
Contribution
It provides the first detailed measurement of dijet cross sections as a function of the photon energy fraction in virtual photon interactions, highlighting the importance of resolved photon contributions.
Findings
Resolved photon component is essential to describe the data.
Measurements extend to high photon virtualities.
QCD predictions align with data only when resolved photons are included.
Abstract
Measurements of dijet cross sections for virtual photons are presented as a function of , the fraction of the virtual photon energy invested in the production of the dijet system, using the ZEUS detector. Comparisons to QCD predictions show that a resolved photon component is needed to describe the data up to values of the photon virtuality comparable to the scale of the interaction.
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