Hadronic structure of the photon at LEP

TL;DR

This paper reviews recent experimental advancements in measuring the hadronic structure function of the photon at LEP, highlighting improved techniques, detailed x and Q^2 dependence, and the photon’s charm component.

Contribution

It presents new experimental results on the photon’s hadronic structure, utilizing improved analysis methods and Monte Carlo models at LEP1 and LEP2.

Findings

Enhanced understanding of the photon’s low x behaviour at various Q^2

Detailed measurements of x dependence and Q^2 evolution at high virtualities

Observation of the photon’s charm component

Abstract

Recent improvements in the analysis techniques and Monte Carlo models used in the measurement of the hadronic structure function of the photon have lead to much improved experimental results. Its low x behaviour was studied in various Q^2 regions using LEP1 and LEP2 data, while its x dependence and Q^2 evolution up to very high virtualities, as well as its charm component were studied using the high energy and luminosity data of LEP2. These recent results will be presented.