Probing the Color Glass Condensate in an electron-ion collider

Abstract

Perturbative Quantum Chromodynamics (pQCD) predicts that the small-$x$ gluons in a hadron wavefunction should form a Color Glass Condensate (CGC), characterized by a saturation scale $Q_s(x,A)$ which is energy and atomic number dependent. In this paper we study the predictions of CGC physics for electron - ion collisions at high energies. We consider that the nucleus at high energies acts as an amplifier of the physics of high parton densities and estimate the nuclear structure function $F_2^A(x,Q^2)$, as well as the longitudinal and charm contributions, using a generalization for nuclear targets of the Iancu-Itakura-Munier model which describes the $ep$ HERA data quite well. Moreover, we investigate the behavior of the logarithmic slopes of the total and longitudinal structure functions in the kinematical region of the future electron - ion collider eRHIC.

18 pages, 9 figures. Version to be published in the European Physical Journal C

References in corpus (9)

• Saturation Physics and Deuteron--Gold Collisions at RHIC
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• The Color Glass Condensate and hadron production in the forward region
• Relating high-energy lepton-hadron, proton-nucleus and nucleus-nucleus collisions through geometric scaling
• Numerical analysis of the Balitsky-Kovchegov equation with running coupling: dependence of the saturation scale on nuclear size and rapidity
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• Gluon Saturation in the Colour Dipole Model?
• Forward Production in d+Au Collisions by Parton Recombination
• A phenomenological analysis of the longitudinal structure function at small $x$ and low $Q^2$

Cited by in corpus (16)

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• Could saturation effects be visible in a future electron-ion collider?
• Constraining the nuclear gluon distribution in $eA$ processes at RHIC
• Exclusive vector meson production in electron-ion collisions
• Nuclear shadowing from exclusive quarkonium photoproduction at the BNL RHIC and CERN LHC
• Charm and longitudinal structure functions with the Kharzeev-Levin-Nardi model
• Deeply virtual Compton scattering at small-$x$ in future Electron - Ion Colliders
• Nuclear effects on the longitudinal structure function at small x
• Inclusive heavy quark photoproduction in $pp$, $pPb$ and $PbPb$ collisions at Run 2 LHC energies
• A phenomenological analysis of the nonperturbative QCD contributions for the photon wave function
• Heavy quark production in deep inelastic electron-nucleus scattering
• Diffractive $\rho$ production at small $x$ in future Electron - Ion Colliders
• Probing gluon number fluctuation effects in future electron-hadron colliders
• Nuclear shadowing in deep inelastic scattering on nuclei: a closer look
• Exclusive heavy quark photoproduction in $pp$, $pPb$ and $PbPb$ collisions at the LHC and FCC energies
• Coulomb corrections to inclusive cross sections at the future Electron - Ion Collider