Abstract
We present a systematic analysis of the polarized and unpolarized processes e+e−→ e+e−X in the deep inelastic limit and study the effect of target photon mass (virtuality) on the photon structure functions. The effect of target photon virtuality manifests itself as new singly polarized structure functions, and also alters the physical interpretation of the unpolarized structure functions. The physical interpretation of these structure functions in terms of hadronic components is studied using the free field analysis. We also retrieve the real photon results in the limit where the virtuality goes to zero. Assuming factorization of the photon structure tensor, the relevant QCD corrections to the various twist 2 structure functions are evaluated.
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