# On neutrino production of a charmed meson

## TL;DR

This paper calculates the amplitude for exclusive neutrino-induced production of a charmed D meson using collinear QCD, providing insights into gluon and quark GPDs and their contributions to hadronic structure.

## Contribution

It introduces a method to access various generalized parton distributions through neutrino-induced D meson production, highlighting the potential to probe gluonic and quark contributions.

## Key findings

- Cross section energy dependence separates GPD contributions.
- Azimuthal measurements isolate transversity GPDs.
- Flavor dependence tests gluonic contribution significance.

## Abstract

We calculate in the framework of the collinear QCD approach the amplitude for exclusive neutrino-production of a pseudoscalar charmed $D$ meson. This process allows to access gluon and both chiral-odd and chiral-even quark generalized parton distributions (GPDs), which contribute in specific ways to the amplitude for different polarization states of the $W$ boson. The energy dependence of the cross section allows to separate different contributions and the measurement of the azimuthal dependence helps to single out the transversity chiral-odd GPDs contributions. The flavor dependence, and in particular the difference between $D^+$ and $D^0$ production rates, allows to test the importance of gluonic contributions. The behaviour of the proton and neutron target cross sections enables to separate the $u$ and $d$ quark contributions. Planned medium and high energy neutrino facilities will thus allow some important progress in the realm of hadronic physics.