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Title: Gluon imaging using azimuthal correlations in diffractive scattering at the Electron-Ion Collider

Journal Article · · Physical Review D

We study coherent diffractive photon and vector meson production in electron-proton and electron-nucleus collisions within the Color Glass Condensate effective field theory. We show that electron-photon and electron-vector meson azimuthal angle correlations are sensitive to non-trivial spatial correlations in the gluon distribution of the target, and perform explicit calculations using spatially dependent McLerran-Venugopalan initial color charge configurations coupled to the numerical solution of small x JIMWLK evolution equations. We compute the cross-section differentially in Q2 and and find sizeable anisotropies in the electron-photon and electron-J/ψ azimuthal correlations (v1,2 ≈ 2-10%) in electron-proton collisions for the kinematics of the future ElectronIon Collider. In electron-gold collisions these modulations are found to be significantly smaller. We also compute incoherent diffractive production where we find that the azimuthal correlations are sensitive to fluctuations of the gluon distribution in the target.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP)
Grant/Contract Number:
SC0012704
OSTI ID:
1784372
Alternate ID(s):
OSTI ID: 1781522
Report Number(s):
BNL-221345-2021-JAAM; PRVDAQ; 094026
Journal Information:
Physical Review D, Journal Name: Physical Review D Vol. 103 Journal Issue: 9; ISSN 2470-0010
Publisher:
American Physical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

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