GTMD model predictions for diffractive dijet production at EIC

Abstract

In this paper we consider a small-x model for gluon GTMDs that we fit to data on diffractive dijet production in electron-proton collisions obtained by HERA's H1 Collaboration. Assuming a small number of free parameters, each with a physical motivation, we are able to describe those data fairly well and with this model we obtain predictions for the EIC for both electroproduction and photoproduction which may allow to further test the underlying GTMD description. In the general discussion of the impact parameter dependence we recall some subtle issues related to localization of states, choice of frames, and discuss what these aspects imply for the range of applicability of the model.

Signature of the gluon orbital angular momentum

“…1. This process has attracted a lot of attention in the literature in different contexts [7,8,[21][22][23][24][25][26][27][28][29]. However, longitudinal double spin asymmetry has not been studied to our knowledge.…”