# EPS-HEP2019

10-17 July 2019
Ghent
Europe/Brussels timezone

## Generalized Parton Distributions from charged current meson production

12 Jul 2019, 11:30
15m
Campus Ledeganck - Aud. 6 (Ghent)

### Campus Ledeganck - Aud. 6

#### Ghent

Parallel talk QCD and Hadronic Physics

### Speaker

We suggest that generalized parton distributions can be probed in charged current meson production process, like $ep\to e\pi^{−}p$ and $ep\to e\rho^{−}p$. In contrast to pion photoproduction, this process is sensitive to the unpolarized GPDs $H, E$, and for this reason has a very small contamination by higher twist and Bethe-Heitler type contributions. 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.