Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-01-18
Nucl.Phys.Proc.Suppl.184:27-30,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
4 pages, 3 figures, uses photon2007.cls, Proceedings of Photon 2007 (Paris)
Scientific paper
10.1016/j.nuclphysbps.2008.09.12
The unpolarized virtual photon structure functions $F_2^\gamma(x,Q^2,P^2)$ and $F_L^\gamma(x,Q^2,P^2)$ are investigated in perturbative QCD for the kinematical region $\Lambda^2 \ll P^2 \ll Q^2$, where $-Q^2(-P^2)$ is the mass squared of the probe (target) photon and $\Lambda$ is the QCD scale parameter. In the framework of operator product expansion supplemented by the renormalization group method, the definite predictions are derived for the moments of $F_2^\gamma(x,Q^2,P^2)$ up to the next-to-next-to-leading order (the order $\alpha\alpha_s$) and for the moments of $F_L^\gamma(x,Q^2,P^2)$ up to the next-to-leading order (the order $\alpha\alpha_s$)
Sasaki Ken
Ueda Takahiro
Uematsu Tsuneo
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