Spin structure function of the virtual photon

Abstract

We investigate the spin structure of the virtual photon beyond the leading order in QCD. The first moment of the virtual photon spin structure function $g_1^{\gamma }(x,Q^2,P^2)$ with QCD effects turns out to be non-vanishing in contrast to the real photon case. Numerical analysis for virtual as well as real photon case is presented.

Comments: 3 pages, LaTeX, 3 ps figures, uses npb.sty, Contribution to the Workshop on Deep Inelastic Scattering and QCD (DIS 99), Zeuthen, April 1999