Probing Parton Saturation and the Gluon Dipole via Diffractive Jet Production at the Electron-Ion Collider

Iancu, E.; Mueller, A. H.; Triantafyllopoulos, D. N.

doi:10.1103/PhysRevLett.128.202001

Title: Probing Parton Saturation and the Gluon Dipole via Diffractive Jet Production at the Electron-Ion Collider

Journal Article · Tue May 17 00:00:00 EDT 2022 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.128.202001· OSTI ID:1868403

; Mueller, A. H.;

We demonstrate that hard dijet production via coherent inelastic diffraction is a promising channel for probing gluon saturation at the Electron-Ion Collider. By inelastic diffraction, we mean a process in which the two hard jets—a quark-antiquark pair generated by the decay of the virtual photon—are accompanied by a softer gluon jet, emitted by the quark or the antiquark. This process can be described as the elastic scattering of an effective gluon-gluon dipole. The cross section takes a factorized form, between a hard factor and a unintegrated (“Pomeron”) gluon distribution describing the transverse momentum imbalance between the hard dijets. The dominant contribution comes from the black disk limit and leads to a dijet imbalance of the order of the target saturation momentum Q_s evaluated at the rapidity gap. Integrating out the dijet imbalance, we obtain a collinear factorization where the initial condition for the Dokshitzer-Gribov-Lipatov-Altarelli-Parisi evolution is set by gluon saturation.

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Research Organization:: Columbia Univ., New York, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC); Agence Nationale de la Recherche (ANR)

Grant/Contract Number:: FG02-92ER40699

OSTI ID:: 1868403

Alternate ID(s):: OSTI ID: 1980284

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Vol. 128 Journal Issue: 20; ISSN 0031-9007

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Title: Probing Parton Saturation and the Gluon Dipole via Diffractive Jet Production at the Electron-Ion Collider

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