Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1994-11-16
Nucl.Phys. B448 (1995) 51-66
Physics
High Energy Physics
High Energy Physics - Phenomenology
18 pages, ReVTeX, 2 figures (not available by postscript yet)
Scientific paper
Infrared renormalons and $1/Q^2$ power corrections in deep-inelastic sum rules are studied. The renormalization of operators with power divergence are discussed. The higher-twist terms in the operator product expansion are shown to account for the residual soft contributions survived from the Kinoshita-Lee-Nauenberg type of cancellation in Feynman diagrams. The presence of some degree of arbitrariness in the twist separation allows one to define the most convenient higher-twist operators suitable for a particular non-perturbative method. The discussion is focused on the Bjorken sum rule, for which the $1/Q^2$ corrections are considered on a lattice.
Ji Xiangdong
MIT
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