It is shown that the D--meson, whose light quark is the initial-pion valence quark and whose charmed quark is produced in annihilation of valence quarks and has got a large enough momentum, is really a leading meson in reactions like π−p−>DX. If such annihilation of valence quarks from initial hadrons is impossible there must be no distinct leading effect.
@article{arxiv.hep-ph/9403270,
title = {On leading charmed meson production in $\pi$-nucleon interactions},
author = {V. A. Bednyakov},
journal= {arXiv preprint arXiv:hep-ph/9403270},
year = {2015}
}