Abbiendi, G;
Ainsley, C;
Åkesson, PF;
Alexander, G;
Allison, J;
Anagnostou, G;
Anderson, KJ;
... Hawkings, R; + view all
(2002)
Measurement of the hadronic photon structure function F_{2}^{γ} at LEP2.
Physics Letters B
, 533
(3-4)
pp. 207-222.
10.1016/S0370-2693(02)01560-5.
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Abstract
The hadronic structure function of the photon F_{2}^{γ} (x, Q²) is measured as a function of Bjorken x and of the photon virtuality Q² using deep-inelastic scattering data taken by the OPAL detector at LEP at e⁺e⁻ centre-of-mass energies from 183 to 209 GeV. Previous OPAL measurements of the x dependence of F_{2}^{γ} are extended to an average Q² of 〈Q²〉=780 GeV² using data in the kinematic range 0.15<x<0.98. The Q² evolution of F_{2}^{γ} is studied for 12.1<〈Q²〉<780 GeV² using three ranges of x. As predicted by QCD, the data show positive scaling violations in F_{2}^{γ} with F_{2}^{γ} (Q²)/α = (0.08±0.02⁺⁰·⁰⁵_₀.₀₃) + (0.13±0.01⁺⁰·⁰¹_₀.₀₁) lnQ², where Q² is in GeV², for the central x region 0.10–0.60. Several parameterisations of F_{2}^{γ} are in qualitative agreement with the measurements whereas the quark-parton model prediction fails to describe the data.
| Type: | Article |
|---|---|
| Title: | Measurement of the hadronic photon structure function F_{2}^{γ} at LEP2 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/S0370-2693(02)01560-5 |
| Publisher version: | https://doi.org/10.1016/S0370-2693(02)01560-5 |
| Language: | English |
| Additional information: | © 2002 Elsevier Science B.V. Open access under CC BY license (https://creativecommons.org/licenses/by/3.0/). |
| Keywords: | function, measurement, Photon, Structure |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/9838 |
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