Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1996-03-19
Mod.Phys.Lett. A12 (1997) 135-143
Physics
High Energy Physics
High Energy Physics - Phenomenology
12 pages, LaTeX, 1 Postscript figure, modified version without no changes in the final result
Scientific paper
10.1142/S0217732397000133
The QCD effects of twist-4 operators on the first moment of nucleon spin-dependent structure function $g_1(x, Q^2 )$ are studied in the framework of operator product expansion and renormalization group method. We investigate the operator mixing through renormalization of the twist-4 operators including those proportional to the equation of motion by evaluating off-shell Green's functions in the usual covariant gauge as well as in the background gauge. Through this procedure we extract the one-loop anomalous dimension of the spin 1 and twist-4 operator which determines the logarithmic correction to the $1/Q^2$ behavior of the contribution from the twist-4 operators to the first moment of $g_1(x,Q^2)$.
Kawamura Hiroyuki
Kodaira Jiro
Uematsu Tsuneo
Yasui Yoshiaki
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