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  • Open Access

Probing GPDs in exclusive electroproduction of dijets

Trambak Jyoti Chall1,*, Marta Łuszczak2,†, Wolfgang Schäfer3,‡, and Antoni Szczurek3,§

  • *Contact author: trambakjyotic@dokt.ur.edu.pl
  • †Contact author: mluszczak@ur.edu.pl
  • ‡Contact author: wolfgang.schafer@ifj.edu.pl
  • §Contact author: antoni.szczurek@ifj.edu.pl
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Phys. Rev. D 113, 114012 – Published 8 June, 2026

DOI: https://doi.org/10.1103/p7m5-qqyx

Abstract

We summarize the formalism for calculating the exclusive dijet production in ep→e′jjp in collinear QCD factorization, using generalized parton distributions as the soft hadronic input modeled in the double distribution approach. We include all leading-order contributions coming from light sea and valence quark exchanges, and gluon exchanges for both light quark-antiquark (qq¯) production and also the heavy cc¯ final state. We present results for several differential distributions for the cross section evaluated over a broad region of phase space, covering a wide range of inelasticity and photon virtuality. The gluon and sea contributions exhibit similar shapes, whereas the valence contribution, though relatively small, shows a markedly different behavior. The latter becomes particularly noticeable at large xP, a kinematic region not explored at HERA, but potentially accessible in future measurements at the Electron Ion Collider. This requires further feasibility studies. We also present the azimuthal angle modulation between the leptonic and the outgoing dijet planes for the general case, as well as for the ZEUS kinematic region where we see reasonable agreement with the data for diffractive deep inelastic scattering parameter β≳0.4.

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Phys. Rev. D 113, 114012– Published 8 June, 2026
  • Received 13 March 2026
  • Accepted 7 May 2026
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.

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