Probing gluon Bose correlations in DIS

TL;DR

This paper investigates how Bose-Einstein correlations among gluons in a hadronic wave function can be observed in high-energy Deep Inelastic Scattering experiments, especially through diffractive dijet production, and discusses their enhancement in nuclear targets.

Contribution

It demonstrates that gluon Bose enhancement correlations can be probed in DIS experiments and shows their increased strength in electron-nucleus collisions, with implications for future Electron-Ion Collider measurements.

Findings

Bose-Einstein correlations lead to a peak at zero relative angle in dijet azimuthal distributions.

Nuclear targets amplify the Bose enhancement effect.

Future high-luminosity Electron-Ion Collider can measure these correlations.

Abstract

We study correlations originating from the quantum nature of gluons in a hadronic wave function. Bose-Einstein correlation between identical particles lead to the enhancement in the number of pairs of gluons with the same quantum numbers and small relative momentum. We show that these preexisting correlations can be probed in Deep Inelastic Scattering experiments at high energy. Specifically, we consider diffractive dijet plus a third jet production. The azimuthal dependence displays a peak at the zero relative angle between the transverse momentum imbalance of the photon-going dijet and the transverse momentum of the hadron-going jet. Our calculations explicitly show that the peak originates from Bose enhancement. Comparing electron-proton to electron-nucleus collisions, we demonstrate that the nuclear target enhances the relative strength of the peak. With the future high luminosity Electron-Ion Collider the proposed measurements of gluon Bose enhancement become experimentally feasible.