Evolution equations for higher moments of angular momentum distributions

P. Hägler, A. Schäfer
1998 Physics Letters B  
Based on a sumrule for the nucleon spin we expand quark and gluon orbital angular momentum operators and derive an evolution matrix for higher moments of the corresponding distributions. In combination with the spin-dependent DGLAP-matrix we find a complete set of spin and orbital angular momentum evolution equations.
doi:10.1016/s0370-2693(98)00414-6 fatcat:icjde6fxjvfalaxp5xvsvnr6zu