
%0 Journal Article
%A Tanaka, Kazuhiro 
%T Spin Structure Functions of the Nucleon and Twist-3 Operators in QCD
%J Australian Journal of Physics
%D 1997/01/24
%V 50
%N 1
%P 79-94
%K 
%R https://doi.org/10.1071/P96048
%U https://www.publish.csiro.au/paper/P96048 
%X We investigate the twist-3 spin-dependent parton distribution functions hL(x; Q2) and gT (x; Q2). We discuss the physical relevance of the parton distributions from the view point of the factorization theorem in QCD. A unique feature of the &#8216;measurable&#8217; higher-twist distributions hL and gT is emphasized. We investigate the Q2 -evolution of hL and gT in the framework of the renormalization group and standard QCD perturbation theory. We calculate the anomalous dimension matrix for the twist-3 operators for hL and gT in the one-loop order. The operator mixing among the relevant twist-3 operators, including the operators proportional to the QCD equations of motion, is treated properly in a consistent scheme. Implications for future experiments are also discussed. 
