Photon Structure and Quantum Fluctuation

TL;DR

This paper reviews the concept of photon structure arising from quantum fluctuations, emphasizing its significance in testing quantum electrodynamics and quantum chromodynamics through experimental measurements and theoretical comparisons.

Contribution

It provides an overview of experimental measurements of hadronic photon structure and compares them with theoretical predictions based on photon fluctuations into quarks in QCD.

Findings

Photon structure confirmed through experiments in e+e- and ep interactions.

Experimental results align with QCD predictions of photon fluctuation into quark-antiquark pairs.

Highlights the role of photon structure in testing fundamental quantum field theories.

Abstract

Photon structure derives from quantum fluctuation in quantum field theory to fermion and anti-fermion, and has been an experimentally established feature of electrodynamics since the discovery of the positron. In hadronic physics, the observation of factorisable photon structure is similarly a fundamental test of the quantum field theory Quantum Chromodynamics (QCD). An overview of measurements of hadronic photon structure in e+e- and ep interactions is presented, and comparison made with theoretical expectation, drawing on the essential features of photon fluctuation into quark and anti-quark in QCD.