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VOLUME 60 (1994) | ISSUE 3 | PAGE 149
The photon structure function F2 in QCD with nonlocal vacuum quaik condensates
We calculate the contribution from nonlocal vacuum condensates of quark fields to the hadronic part of the photon structure function Fz(x) in the operator product expansion approach to QCD and as a result obtain a substantial improvement of the agreement with experimental data for the standard value of the parameter X2q = {SD2q)l(qq) « 0.5 GeV2.