| Title: | MEASUREMENT OF THE HADRONIC PHOTON STRUCTURE FUNCTION  AT LEP2 |
| DOI No: | 10.1142/9789812777157_0001 |
| Source: | PHOTON 2001 (pp 3-6)
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| Author(s): | R. J. TAYLOR
Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom
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| Abstract: | The hadronic structure function of the photon  is measured as a function of Bjorken x and of the factorisation scale Q2 using data taken by the OPAL detector at LEP. Previous OPAL measurements of the x dependence of  are extended to an average Q2 of 767 GeV2. The Q2 evolution of  is studied for 11.9 < ⟨Q2⟩ < 1051 GeV2. As predicted by QCD, the data show positive scaling violations in  . Several parameterisations of  are in agreement with the measurements whereas the quark-parton model prediction fails to describe the data. |
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