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PreprintCC BY 4.0arXiv

Evading Sudakov Dilution in Gluon Tomography

  • Shuo Lin
  • Jian Zhou
Open at sourcePDFDOICite

Abstract

Sudakov broadening and competing azimuthal harmonics from final-state soft radiation limit the precision of gluon tomography. We suppress both effects using fiducial hadronic recoil---the vector sum of all hadronic transverse momenta within a rapidity interval---while a tagged jet fixes the azimuthal axis. Momentum conservation ensures that emissions inside the interval contribute neither to recoil broadening nor to these harmonics, so widening the interval reduces their impact without a soft-radiation veto. As a benchmark, we study the cos 2ϕ modulation probing h1⊥ g in DIS. For rapidity interval Δη=3, fiducial recoil enhances the h1⊥ g contribution by a factor of $4.6$ and suppresses the final-state soft gluon term by a factor of $4.0$ relative to the conventional dijet imbalance. Fiducial recoil thereby enables precision gluon-TMD tomography.

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Cite

BibTeXRIS
BibTeX
@misc{lin2026evading,
  title = {{Evading Sudakov Dilution in Gluon Tomography}},
  author = {Shuo Lin and Jian Zhou},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.02280},
  eprint = {2609.02280},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.02280},
  note = {CC BY 4.0},
}
RIS
TY  - UNPB
TI  - Evading Sudakov Dilution in Gluon Tomography
AU  - Shuo Lin
AU  - Jian Zhou
PY  - 2026
DA  - 2026/09/02
PB  - arXiv
DO  - 10.48550/arxiv.2609.02280
UR  - https://arxiv.org/abs/2609.02280
AB  - Sudakov broadening and competing azimuthal harmonics from final-state soft radiation limit the precision of gluon tomography. We suppress both effects using fiducial hadronic recoil---the vector sum of all hadronic transverse momenta within a rapidity interval---while a tagged jet fixes the azimuthal axis. Momentum conservation ensures that emissions inside the interval contribute neither to recoil broadening nor to these harmonics, so widening the interval reduces their impact without a soft-radiation veto. As a benchmark, we study the cos 2ϕ modulation probing h_1^⊥ g in DIS. For rapidity interval Δη=3, fiducial recoil enhances the h_1^⊥ g contribution by a factor of $4.6$ and suppresses the final-state soft gluon term by a factor of $4.0$ relative to the conventional dijet imbalance. Fiducial recoil thereby enables precision gluon-TMD tomography.
ER  -