Q^2-evolution of chiral-odd twist-3 distributions h_L(x,Q^2) and e(x, Q^2) in the large N_c limit

Abstract

We prove that the twist-3 chiral-odd parton distributions obey simple GLAP evolution equations in the limit $N_c\to \infty$ and give analytic formulae for the corresponding anomalous dimensions. The results are valid to O(1/N_{c}^2) accuracy and will be useful in confronting with future experiments.

Comments: 3 pages, LaTeX. To appear in the proceedings of the XII International Symposium on High Energy Spin Physics (SPIN96), 10-14 Sept 1996, Amsterdam, The Netherlands