# 25th International Workshop on Deep Inelastic Scattering and Related Topics

Apr 3 – 7, 2017
University of Birmingham
Europe/London timezone

## Measurement of Gluon Orbital Angular Momentum at EIC

Apr 6, 2017, 12:00 PM
20m
Nuffield Building G13

#### Nuffield Building G13

WG6) Spin and 3D Structure

### Speaker

Yong Zhao (University of Maryland, College Park)

### Description

In this talk, I will discuss the experimental observable at the electron-ion collider (EIC) that can be used to identify the gluon orbital angular momentum (OAM) density at arbitrary $x$. We will show that the single longitudinal target-spin asymmetry in exclusive dijet production will be sensitive to the gluon OAM density. The latter contributes to the spin asymmetry with a characteristic azimuthal angular modulation of $\sin(\phi_\Delta-\phi_q)$, where $\phi_\Delta$ and $\phi_q$ arethe azimuthal angles of the proton momentum transfer and the relative transverse momentum between the quark-antiquark pair.

### Primary author

Yong Zhao (University of Maryland, College Park)

Feng Yuan (LBNL)