Infrared Renormalons and Power Corrections in Deep-inelastic Sum Rules
نویسنده
چکیده
Infrared renormalons and 1/Q2 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-LeeNauenberg 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/Q2 corrections are considered on a lattice. Typeset using REVTEX This work is supported in part by funds provided by the U.S. Department of Energy (D.O.E.) under cooperative agreement #DF-FC02-94ER40818.
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تاریخ انتشار 1994