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

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Mäntysaari , H , Roy , K , Salazar , F & Schenke , B 2021 , ' Gluon imaging using azimuthal correlations in diffractive scattering at the Electron-Ion Collider ' , Physical Review D , vol. 103 , no. 9 , 094026 . https://doi.org/10.1103/PhysRevD.103.094026

Title: Gluon imaging using azimuthal correlations in diffractive scattering at the Electron-Ion Collider
Author: Mäntysaari, Heikki; Roy, Kaushik; Salazar, Farid; Schenke, Björn
Contributor organization: Helsinki Institute of Physics
Date: 2021-05-21
Language: eng
Number of pages: 31
Belongs to series: Physical Review D
ISSN: 2470-0010
DOI: https://doi.org/10.1103/PhysRevD.103.094026
URI: http://hdl.handle.net/10138/332394
Abstract: 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 nontrivial 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 Q(2) and vertical bar t vertical bar and find sizeable anisotropies in the electron-photon and electron-J/psi azimuthal correlations (v(1,2) approximate to 2-10%) in electron-proton collisions for the kinematics of the future Electron-Ion Collider. In electron-gold collisions these modulations are found to be significantly smaller (v(1,2) < 0.1%). We also compute incoherent diffractive production where we find that the azimuthal correlations are sensitive to fluctuations of the gluon distribution in the target.
Subject: 114 Physical sciences
VIRTUAL COMPTON-SCATTERING
LARGE MOMENTUM-TRANSFER
VECTOR-MESON PRODUCTION
COLOR GLASS CONDENSATE
J/PSI MESONS
PARTON DISTRIBUTIONS
ENERGY-DEPENDENCE
WAVE-FUNCTIONS
PHOTOPRODUCTION
EVOLUTION
Peer reviewed: Yes
Rights: cc_by
Usage restriction: openAccess
Self-archived version: publishedVersion


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