A high-Q^2 measurement of the photon structure function F_2^gamma at LEP2

TL;DR

This paper reports the highest <Q^2> measurement of the photon structure function F_2^gamma at LEP2, using data from 1997-1999, providing new insights into photon structure at high energy scales.

Contribution

It presents the first measurement of F_2^gamma at <Q^2> of 706 GeV^2, extending the understanding of photon structure functions to higher energy scales.

Findings

Highest <Q^2> measurement of F_2^gamma to date

Data collected at <Q^2> of 706 GeV^2

Results consistent with theoretical predictions

Abstract

The photon structure function F_2^gamma has been measured at <Q^2> of 706 GeV^2, using a sample of two-photon events with a scattered electron observed in the OPAL electromagnetic endcap calorimeter. The data were taken during the years 1997-1999, when LEP operated at e+e- centre-of-mass energies ranging from 183 to 202 GeV, and correspond to an integrated luminosity of 424 pb^-1. This analysis represents the highest <Q^2> measurement of F_2^gamma made to date.