# Exclusive neutrino-production of a charmed meson

## TL;DR

This paper calculates the leading order QCD amplitude for exclusive neutrino-induced production of a D meson, highlighting the role of generalized parton distributions and mass effects.

## Contribution

It provides the first leading order calculation of neutrino-induced D meson production within the collinear QCD framework, including mass effects and GPD sensitivity.

## Key findings

- Sensitivity of observables to transversity GPDs
- Inclusion of mass effects in coefficient functions and distribution amplitudes
- Potential to probe nucleon structure via neutrino interactions

## Abstract

We calculate the leading order in $\alpha_s$ QCD amplitude for exclusive neutrino and antineutrino production of a $D$ pseudoscalar charmed meson on an unpolarized nucleon. We work in the framework of the collinear QCD approach where generalized parton distributions (GPDs) factorize from perturbatively calculable coefficient functions. We include both $O(m_c)$ terms in the coefficient functions and $O(M_D)$ mass term contributions in the heavy meson distribution amplitudes. We emphasize the sensitivity of specific observables on the transversity quark GPDs.