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We explore the relevance of extending the concept of the structure to thelongitudinally polarized virtual photon involved in hard collisions. We showthat for moderate photon virtualities and in the kinematical region accessiblein current experiments at HERA and LEP, the contributions of its longitudinalpolarization to hard collisions are sizable and should be taken into account aspart of the resolved photon component.Comment: 13 pages, Latex, 5 eps figure

The relevance of ${\mathbf{\gamma^*_{\mathrm{L}}}}$ in hard collisions of virtual photons