Target mass corrections for the virtual photon structure functions to the next-to-next-to-leading order in QCD
Target mass corrections for the virtual photon structure functions to the next-to-next-to-leading order in QCD
We investigate target mass effects in the unpolarized virtual photon structure functions ${F}_{2}^{\ensuremath{\gamma}}(x,{Q}^{2},{P}^{2})$ and ${F}_{L}^{\ensuremath{\gamma}}(x,{Q}^{2},{P}^{2})$ in perturbative QCD for the kinematical region ${\ensuremath{\Lambda}}^{2}\ensuremath{\ll}{P}^{2}\ensuremath{\ll}{Q}^{2}$, where $\ensuremath{-}{Q}^{2}(\ensuremath{-}{P}^{2})$ is the mass squared of the probe (target) photon and $\ensuremath{\Lambda}$ is the QCD scale parameter. We obtain the Nachtmann moments for the structure functions …