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

Abstract

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.

Comments: 6 pages, 2 figures, 6th international conference on Physics Opportunities at an Electron-Ion Collider, POETIC-6, September 7-11 2015, Ecole polytechnique, Palaiseau, France; v2 : eq.10 and Fig. 2 corrected