https://doi.org/10.1140/epjc/s10052-023-12040-6
Regular Article - Theoretical Physics
Probing gluon GTMDs through exclusive coherent diffractive processes
1
Van Swinderen Institute for Particle Physics and Gravity, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands
2
Department of Physics, Universitas Gadjah Mada, BLS 21, Yogyakarta, Indonesia
b c.setyadi@rug.nl, chalis@ugm.ac.id
Received:
9
May
2023
Accepted:
14
September
2023
Published online:
4
October
2023
We extend a previous GTMD model to improve the description of the HERA data on diffractive dijet production, and include exclusive coherent diffractive 
production data. We find that within our gluon GTMD model context and assumptions, there is considerable tension between the data for these two types of processes concerning the t dependence. Photo- and electroproduction data for protons and nuclei from EIC and UPC data from LHC and RHIC can help to establish whether a common GTMD description is possible, as one would expect, and to facilitate studies of such data we provide predictions for the various experiments. We point out explicitly in which sense this goes beyond the description in terms of GPDs.
© The Author(s) 2023
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