Probing the transversity spin structure of a nucleon in neutrino-production of a charmed meson

Including O(m(c)) terms in the coefficient functions and/or O(m(D)) twist 3 contributions in the heavy meson distribution amplitudes leads to a non-zero transverse amplitude for exclusive neutrino production of a D pseudoscalar charmed meson on an unpolarized target. We work in the framework of the collinear QCD approach where chiral-odd transversity generalized parton distributions (GPDs) factorize from perturbatively calculable coefficient functions.