Infrared Renormalons and Power Corrections in Deep-Inelastic Sum Rules(25)

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

FIGURES

FIG.1.a).A bubble-chain diagram for the coe?cient function of the Bjorken sum rule.b). The corresponding matrix element of the twist-four operator.