Role of the GPD-E in exclusive dijet electroproduction at the Electron-Ion Collider

@misc{chall2026role,
  title = {{Role of the GPD-$E$ in exclusive dijet electroproduction at the Electron-Ion Collider}},
  author = {Trambak Jyoti Chall and Agnieszka Łuszczak and Marta Łuszczak and Wolfgang Schäfer and Antoni Szczurek},
  howpublished = {arXiv},
  year = {2026},
  month = nov,
  doi = {10.48550/arxiv.2611.02911},
  eprint = {2611.02911},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2611.02911},
  note = {CC BY 4.0},
}

TY  - UNPB
TI  - Role of the GPD-E in exclusive dijet electroproduction at the Electron-Ion Collider
AU  - Trambak Jyoti Chall
AU  - Agnieszka Łuszczak
AU  - Marta Łuszczak
AU  - Wolfgang Schäfer
AU  - Antoni Szczurek
PY  - 2026
DA  - 2026/11/02
PB  - arXiv
DO  - 10.48550/arxiv.2611.02911
UR  - https://arxiv.org/abs/2611.02911
AB  - We calculate the contribution of the E-type generalized parton distributions (GPDs) to exclusive dijet electroproduction in ep→ e'jjp in collinear QCD factorization, including both the proton helicity-flipping amplitude and the GPD-E term in the helicity-conserving amplitude, using the double distribution approach for modeling. We include light sea and valence-quark exchanges as well as gluon exchanges and compare the proton helicity-conserving and helicity-flipping contributions for HERA-energy phase space and for Electron-Ion Collider (EIC) kinematics. We find that the helicity-flipping cross section is dominated by valence-quark exchange and has a markedly different dependence on |t| and x_ℙ from the helicity-conserving contribution. In the EIC kinematics considered here, the helicity-flip contribution becomes comparable to the helicity-conserving one at large |t| and x_ℙ. The results show that exclusive dijet electroproduction can be sensitive to the E-type GPDs in the kinematic region accessible at the EIC.
ER  -