Meson twist-4 parton distributions in terms of twist-2 distribution amplitudes at large Nc
arXiv:hep-ph/0011166 · doi:10.1088/0954-3899/27/12/101
Abstract
We show that in the large N_c limit four-quark twist-4 distributions in the pion can be expressed in terms of twist-2 pion distribution amplitude. This allows us to compute the isospin-2 structure function of the pion F_2^{I=2}(x_B) in the large N_c limit. The method can be easily applied to other mesons as well.
6 pages, one figure