OPE analysis of the nucleon scattering tensor including weak interaction   and finite mass effects
  We perform a systematic operator product expansion of the most general form of the nucleon scattering tensor $W_{\mu \nu}$ including electro-magnetic and weak interaction processes. Finite quark masses are taken into account and a number of higher-twist corrections are included. In this way we derive relations between the lowest moments of all 14 structure functions and matrix elements of local operators. Besides reproducing well-known results, new sum rules for parity-violating polarized structure functions and new mass correction terms are obtained. 
M. Maul, B. Ehrnsperger, E. Stein, and A. Sch\"afer