An Analysis of the Next-to-Leading Order Corrections to the g_T(=g_1+g_2) Scaling Function

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dc.creatorJi, Xiangdong
dc.creatorOsborne, Jonathan
dc.date2001-02-02
dc.date2001-03-02
dc.date.accessioned2026-07-07T10:52:16Z
dc.date.available2026-07-07T10:52:16Z
dc.descriptionWe present a general method for obtaining the quantum chromodynamical radiative corrections to the higher-twist (power-suppressed) contributions to inclusive deep-inelastic scattering in terms of light-cone correlation functions of the fundamental fields of quantum chromodynamics. Using this procedure, we calculate the previously unknown ${\cal O}(α_s)$ corrections to the twist-three part of the spin scaling function $g_T(x_B,Q^2) (=g_1(x_B,Q^2)+g_2(x_B,Q^2))$ and the corresponding forward Compton amplitude $S_T(ν,Q^2)$. Expanding our result about the unphysical point $x_B=\infty$, we arrive at an operator product expansion of the nonlocal product of two electromagnetic current operators involving twist-two and -three operators valid to ${\cal O}(α_s)$ for forward matrix elements. We find that the Wandzura-Wilczek relation between $g_1(x_B,Q^2)$ and the twist-two part of $g_T(x_B,Q^2)$ is respected in both the singlet and non-singlet sectors at this order, and argue its validity to all orders. The large-$N_c$ limit does not appreciably simplify the twist-three Wilson coefficients.
dc.description41 pages, 9 figures, corrected minor error
dc.identifierhttps://arxiv.org/abs/hep-ph/0102026
dc.identifierhttp://arxiv.org/abs/hep-ph/0102026
dc.identifierNucl.Phys.B608:235-278,2001
dc.identifierdoi:10.1016/S0550-3213(01)00249-8
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/185103
dc.subjectHigh Energy Physics - Phenomenology
dc.titleAn Analysis of the Next-to-Leading Order Corrections to the g_T(=g_1+g_2) Scaling Function
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