# Generalized Parton Distributions from charged current meson production

## TL;DR

This paper demonstrates that studying charged current meson production in specific kinematics enables precise extraction of generalized parton distributions and constraints on meson distribution amplitudes, with feasible experimental cross-sections.

## Contribution

It introduces a method to extract GPDs and meson distribution amplitudes simultaneously through charged current processes in Bjorken kinematics, improving analysis clarity.

## Key findings

- Allows clean extraction of GPDs with control of higher-twist effects
- Provides target-independent constraints on meson distribution amplitudes
- Cross-sections are within reach of JLab and EIC experiments

## Abstract

In this paper we prove that the simultaneous study of both $\rho$- and $\pi$-meson production by charged currents in Bjorken kinematics allows for a very clean extraction of the leading twist Generalized Parton Distributions of the target, with inherent control of the contribution of higher-twist corrections. Also, it might provide target-independent constraints on the distribution amplitudes of the produced mesons. We expect that such processes might be studied either in neutrino-induced or in electron-induced processes. According to our numerical estimates, the cross-sections of these processes are within the reach of JLab and EIC experiments.