Hadronic Component of the Photon Spin Dependent Structure Function g γ 1 from QCD
Abstract
We calculate the spin dependent structure function of the polarized virtual photon
g
γ
1
(x,
Q
2
,
p
2
)
, especially its hadronic part, using the OPE in the inverse powers of the target photon virtuality. Some model is accepted to achieve a correct analytical behaviour in the photon squared mass. This enables extrapolation to the case of a real photon.