Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1998-12-30
Phys.Rev. D59 (1999) 114011
Physics
High Energy Physics
High Energy Physics - Phenomenology
39 pages, LaTeX, 6 Postscript Figures, eqsection.sty file included
Scientific paper
10.1103/PhysRevD.59.114011
Polarized photon structure can be studied in the future polarized $e^{+}e^{-}$ colliding-beam experiments. We investigate the spin-dependent structure function of the virtual photon $g_1^{\gamma}(x,Q^2,P^2)$, in perturbative QCD for $\Lambda^2 \ll P^2 \ll Q^2$, where $-Q^2$ ($-P^2$) is the mass squared of the probe (target) photon. The analysis is performed to next-to-leading order in QCD. We particularly emphasize the renormalization scheme independence of the result.The non-leading corrections significantly modify the leading log result, in particular, at large $x$ as well as at small $x$. We also discuss the non-vanishing first moment sum rule of $g_1^\gamma$, where ${\cal O}(\alpha_s)$ corrections are computed.
Sasaki Ken
Uematsu Tsuneo
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