# Generalized TMDs and the exclusive double Drell-Yan process

## TL;DR

This paper demonstrates how the exclusive double Drell-Yan process can be used to measure generalized transverse momentum dependent parton distributions (GTMDs), providing a new method to probe hadron structure through polarization observables.

## Contribution

It introduces a novel approach to access quark GTMDs via the exclusive double Drell-Yan process, linking theoretical distributions to measurable polarization observables.

## Key findings

- First demonstration of measuring quark GTMDs through the process
- Identification of polarization observables sensitive to specific GTMDs
- Establishment of a new experimental method for hadron structure analysis

## Abstract

Generalized transverse momentum dependent parton distributions (GTMDs) are the most general parton correlation functions of hadrons. By considering the exclusive double Drell-Yan process it is shown for the first time how quark GTMDs can be measured. Specific GTMDs can be addressed by means of polarization observables.