Exclusive processes in $ep$ collisions at the EIC and LHeC: A closer look on the predictions of saturation models

Abstract

The exclusive production of vector mesons and photons in $ep$ collisions is investigated considering three phenomenological saturation models based on distinct assumptions for the treatment of the dipole - hadron scattering amplitude. The latest high precision HERA data for the reduced and vector meson cross sections are used to update the saturation model proposed by Marquet - Peschanski - Soyez (MPS), which predicts that the saturation model is dependent of the squared momentum transfer $t$. The MPS predictions for the photon virtuality, energy and $t$ - dependencies of the exclusive $\rho$, $J/\Psi$ and DVCS cross sections are presented and a detailed comparison with the results derived using the impact parameter saturation models is performed. Our results indicate that a future experimental analysis of the $t$ - distribution $d\sigma /dt$ for exclusive processes in the kinematical range that will covered by the EIC and LHeC, considering the distinct photon polarizations and large values of $t$, will be able to discriminate between the distinct approaches for the QCD dynamics at high energies.

arXiv comment16 pages, 8 figures, 2 tables

References in corpus (73)

• Operator expansion for high-energy scattering
• Small-x F_2 Structure Function of a Nucleus Including Multiple Pomeron Exchanges
• Nonlinear Gluon Evolution in the Color Glass Condensate: I
• The Color Glass Condensate
• The Wilson renormalization group for low x physics: towards the high density regime
• Nonlinear Gluon Evolution in the Color Glass Condensate: II
• The Intrinsic Glue Distribution at Very Small x
• The Wilson renormalization group for low x physics: Gluon evolution at finite parton density
• Unitarity at small Bjorken x
• A Large Hadron Electron Collider at CERN: Report on the Physics and Design Concepts for Machine and Detector
• An Impact Parameter Dipole Saturation Model
• Exclusive diffractive processes at HERA within the dipole picture
• Relating different approaches to nonlinear QCD evolution at finite gluon density
• Geometric scaling for the total gamma^* p cross section in the low x region
• Saturation and BFKL dynamics in the HERA data at small x
• Saturation Physics and Deuteron--Gold Collisions at RHIC
• Evolution at small x_bj: The Color Glass Condensate
• Unitarization of Gluon Distribution in the Doubly Logarithmic Regime at High Density
• Elastic J/Psi Production at HERA
• Geometric scaling as traveling waves
• AAMQS: A non-linear QCD analysis of new HERA data at small-x including heavy quarks
• Analysis of combined HERA data in the Impact-Parameter dependent Saturation model
• Off-diagonal distributions fixed by diagonal partons at small $x$ and $\xi$
• The Large Hadron-Electron Collider at the HL-LHC
• Evidence of strong proton shape fluctuations from incoherent diffraction
• Traveling wave fronts and the transition to saturation
• Measurement of deeply virtual Compton scattering at HERA
• Exclusive electroproduction of J/psi mesons at HERA
• Impact-parameter dependent Color Glass Condensate dipole model and new combined HERA data
• Impact parameter dependent colour glass condensate dipole model
• Colour dipoles and rho, phi electroproduction
• Vector meson leptoproduction and nonperturbative gluon fluctuations in QCD
• Revealing proton shape fluctuations with incoherent diffraction at high energy
• A measurement of the Q^2, W and t dependences of deeply virtual Compton scattering at HERA
• Diffractive Electroproduction of rho and phi Mesons at HERA
• Universality and tree structure of high energy QCD
• Exclusive Electroproduction of ${\rho }^0$ and $J/\psi$ Mesons at HERA
• Exclusive vector meson production at high energies and gluon saturation
• Exclusive rho^0 production in deep inelastic scattering at HERA
• Exclusive diffractive processes in electron-ion collisions
• Incoherent diffractive J/Psi-production in high energy nuclear DIS
• Color Glass Condensate at next-to-leading order meets HERA data
• Deeply Virtual Compton Scattering and its Beam Charge Asymmetry in e^\pm p Collisions at HERA
• Coherent and incoherent $J/\psi$ photonuclear production in an energy-dependent hot-spot model
• Exclusive vector meson production at HERA from QCD with saturation
• Measurement of Deeply Virtual Compton Scattering at HERA
• Review of proton and nuclear shape fluctuations at high energy
• Relativistic corrections to the vector meson light front wave function
• Gluon Tomography from Deeply Virtual Compton Scattering at Small-x
• Geometric scaling in diffractive deep inelastic scattering
• Collider Physics at HERA
• Geometric Scaling in Inclusive Charm Production
• Collinearly improved kernel suppresses Coulomb tails in the impact-parameter dependent Balitsky-Kovchegov evolution
• Solution to the Balitsky-Kovchegov equation with the collinearly improved kernel including impact-parameter dependence
• Exclusive vector meson production at an electron-ion collider
• Systematics of strong nuclear amplification of gluon saturation from exclusive vector meson production in high energy electron-nucleus collisions
• Could saturation effects be visible in a future electron-ion collider?
• The Balitsky-Kovchegov equation in full momentum space
• Nuclear exclusive vector meson photoproduction
• Traveling waves and geometric scaling at non-zero momentum transfer
• Accessing the gluonic structure of light nuclei at the Electron Ion Collider
• Dissociative production of vector mesons at electron-ion colliders
• Ballistic protons in incoherent exclusive vector meson production as a measure of rare parton fluctuations at an Electron-Ion Collider
• Exclusive $\rho$ and $J/\Psi$ photoproduction in ultraperipheral $pA$ collisions: Predictions of the gluon saturation models for the momentum transfer distributions
• Exclusive vector meson production in electron-ion collisions
• Investigating the impact of the gluon saturation effects on the momentum transfer distributions for the exclusive vector meson photoproduction in hadronic collisions
• Coherent and incoherent vector meson electroproduction in the future electron-ion colliders: the hot-spot predictions
• Incoherent diffractive photoproduction of $J/\psi$ and ${\rm Y}$ on heavy nuclei in the color dipole approach
• CGC/saturation approach: a new impact-parameter dependent model in the next-to-leading order of perturbative QCD
• Diffractive deeply inelastic scattering in future electron-ion colliders
• Deeply virtual Compton scattering at small-$x$ in future Electron - Ion Colliders
• Exclusive vector meson production in electron-ion collisions at the EIC, LHeC and FCC-$eh$
• CGC/saturation approach: an impact-parameter dependent model for diffraction production in DIS

Cited by in corpus (6)

• Exclusive production of $\rho$ meson in gamma-proton collisions: $d\sigma /dt$ and the role of helicity flip processes
• Exclusive vector meson productions with the analytical solution of Balitsky-Kovchegov Equation
• Deeply virtual Compton scattering in the tensor-pomeron approach
• Testing the double-logarithm asymptotic gluon density in ultraperipheral heavy ion collisions at the Large Hadron Collider
• Investigating exclusive ${\rho }^0$ photoproduction within the Regge phenomenology approach
• Elastic and inelastic $J/\psi$ photoproduction in $p$-$p$ collisions at LHC energies: the feature of Weizsäcker-Williams approximation