Renormalization of Twist-Four Operators in QCD Bjorken and Ellis–Jaffe Sum Rules
Renormalization of Twist-Four Operators in QCD Bjorken and Ellis–Jaffe Sum Rules
The QCD effects of twist-four 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-four operators including those proportional to the equation …