GPDs at an EIC

TL;DR

This paper explores the potential of the Electron Ion Collider (EIC) to precisely measure Deeply Virtual Compton Scattering (DVCS), enabling detailed insights into the internal structure of protons and nuclei through GPDs.

Contribution

It demonstrates the feasibility and advantages of using the EIC's high luminosity and advanced detector capabilities for high-precision GPD measurements via DVCS.

Findings

High luminosity enables precise GPD extraction.

Advanced detector design improves measurement resolution.

Potential for 2+1 dimensional imaging of nucleons.

Abstract

The feasibility for a measurement of the exclusive production of a real photon, a process although known as Deeply Virtual Compton Scattering (DVCS) at an Electron Ion Collider (EIC) has been explored. DVCS is universally believed to be a golden measurement toward the determination of the Generalized Parton Distribution (GPDs) functions. The high luminosity of the machine, expected in the order of 10^34 cm^-2 s^-1 at the highest center-of-mass energy, together with the large resolution and rapidity acceptance of a newly designed dedicated detector, will open a opportunity for very high precision measurements of DVCS, and thus for the determination of GPDs, providing an important tool toward a 2+1 dimensional picture of the internal structure of the proton and nuclei.