Deeply Virtual Exclusive Processes with Charm

TL;DR

This paper explores the potential of using exclusive electroproduction of strange and charmed mesons at high-energy facilities to gain new insights into nucleon structure and the role of charm quarks within it, employing GPDs.

Contribution

It introduces a novel approach to study charmed meson production via GPDs at the EIC, highlighting its potential to isolate the non-perturbative charm component in nucleons.

Findings

Charmed meson electroproduction can reveal the non-perturbative charm component.

The approach connects quark/gluon degrees of freedom with meson-baryon descriptions.

Exclusive processes provide new insights into polarized and unpolarized nucleon structure.

Abstract

We propose to investigate a largely unexplored sector that is unique to the formulation of hard exclusive processes in terms of GPDs, namely the electroproduction of strange and charmed mesons in the kinematical ranges of Jefferson Lab's 12 GeV upgrade, and of the proposed Electron Ion Collider (EIC). In this contribution we focus on charmed meson production that is unique to the EIC. Exclusive strange and charmed meson production provides new insights in the connection of the quark/gluon degrees of freedom with the meson-baryon description, both in the unpolarized and polarized sectors. However, as particularly evident in polarized scattering, the underlying mechanisms are still far from being fully understood. We present an approach in terms of generalized parton distributions. As an application, we show that through exclusive electroproduction of pseudoscalar charmed mesons one can uniquely single out the non-perturbative charmed component in the nucleon structure function.