Accessing the gluonic structure of light nuclei at the Electron Ion Collider

Abstract

We show how exclusive vector meson production off light ions can be used to probe the spatial distribution of small-$x$ gluons in the deuteron and ${}^3$He wave functions. In particular, we demonstrate how short range repulsive nucleon-nucleon interactions affect the predicted coherent $J/\Psi$ production spectra. Fluctuations of the nucleon substructure are shown to have a significant effect on the incoherent cross section above $|t|\gtrsim 0.2{\mathrm{GeV}}^2$. By explicitly performing the JIMWLK evolution, we predict the $x$-dependence of coherent and incoherent cross sections in the EIC energy range. Besides the increase of the average size of the nucleus with decreasing $x$, both the growth of the nucleons and subnucleonic hot spots are visible in the cross sections. The decreasing length scale of color charge fluctuations with decreasing $x$ is also present, but may not be observable for $|t|<1{\mathrm{GeV}}^2$, if subnucleonic spatial fluctuations are present.

13 pages, 15 figures. v2: typos corrected

References in corpus (14)

• Glauber Modeling in High Energy Nuclear Collisions
• Systematic Measurements of Identified Particle Spectra in pp, d+Au and Au+Au Collisions from STAR
• Analysis of combined HERA data in the Impact-Parameter dependent Saturation model
• Short Range Correlations and the EMC Effect
• Imprints of fluctuating proton shapes on flow in proton-lead collisions at the LHC
• Eccentric protons? Sensitivity of flow to system size and shape in p+p, p+Pb and Pb+Pb collisions
• Wilson line correlator in the MV model: relating the glasma to deep inelastic scattering
• Revealing proton shape fluctuations with incoherent diffraction at high energy
• J/Psi production in ultraperipheral Pb+Pb and p+Pb collisions at energies available at the CERN Large Hadron Collider
• Nuclear enhancement and suppression of diffractive structure functions at high energies
• Collectivity and electromagnetic radiation in small systems
• The shape of the proton at high energies
• On the running coupling in the JIMWLK equation
• Evidence for color fluctuations in the nucleon in high-energy scattering

Cited by in corpus (10)

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• The importance of kinematic twists and genuine saturation effects in dijet production at the Electron-Ion Collider
• Exclusive $J/\psi$ photoproduction in ultraperipheral Pb+Pb collisions at the LHC to next-to-leading order perturbative QCD
• Multi-scale Imaging of Nuclear Deformation at the Electron Ion Collider
• Selected topics in diffraction with protons and nuclei: past, present, and future
• Investigating the structure of gluon fluctuations in the proton with incoherent diffraction at HERA
• Exclusive processes in $ep$ collisions at the EIC and LHeC: A closer look on the predictions of saturation models
• Photoproduction of $J/\psi$ in d+Au ultraperipheral collisions at the BNL Relativistic Heavy Ion Collider
• Energy dependence of the proton geometry in exclusive vector meson production
• Probing the gluonic structure of the deuteron with $J/\psi$ photoproduction in d+Au ultra-peripheral collisions