Accessing the gluon Wigner distribution in ultraperipheral $pA$ collisions

Abstract

We propose to constrain the gluon Wigner distribution in the nucleon by studying the exclusive diffractive dijet production process in ultraperipheral proton-nucleus collisions (UPCs) at RHIC and the LHC. Compared to the previous proposal in Ref. [Y. Hatta, B. W. Xiao, and F. Yuan, Phys. Rev. Lett. 116, 202301 (2016).] to study the same observable in lepton-nucleon scattering, the use of UPCs has a few advantages: not only is the cross section larger, but the extraction of the Wigner distribution from the data also becomes simpler, including its elliptic angular dependence. We compute the corresponding cross section and evaluate the coefficients using models which include the gluon saturation effects. A potential for the measurements of the Wigner distribution at current and future experimental facilities is also discussed.

12 pages, 6 figures; a minor fix to Eq. (15); conclusions unchanged

References in corpus (10)

• The Color Glass Condensate
• Generalized parton correlation functions for a spin-1/2 hadron
• Quark Wigner Distributions and Orbital Angular Momentum
• Measurement of the total cross section from elastic scattering in $pp$ collisions at $\sqrt{s}=7$ TeV with the ATLAS detector
• Measurement of the total cross section from elastic scattering in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Azimuthal anisotropy of direct photons
• The elliptic gluon GTMD inside a large nucleus
• Wigner, Husimi and GTMD distributions in the Color Glass Condensate
• Azimuthal Asymmetry of pions in pp and pA collisions
• Azimuthal Asymmetry of Prompt Photons in Nuclear Collisions

Cited by in corpus (12)

• Diffractive Dijet Production and Wigner Distributions from the Color Glass Condensate
• Probing parton saturation and the gluon dipole via diffractive jet production at the Electron-Ion Collider
• Signature of the gluon orbital angular momentum
• One-Loop Corrections to Dihadron Production in DIS at Small $x$
• Phase-space distributions of nuclear short-range correlations
• Leading twist GTMDs at nonzero skewness and Wigner distributions in boost-invariant longitudinal position space
• Modelling $W^{+}{W}^{-}$ production with rapidity gaps at the LHC
• Matching generalised transverse-momentum-dependent distributions onto generalised parton distributions at one loop
• New opportunities at the photon energy frontier
• Investigating the Transverse Single Spin Asymmetry in the Inelastic $J/\Psi$ photoproduction in $p^{\uparrow }p$ and $p^{\uparrow }A$ collisions
• Mapping the internal structure of hadrons through color and spin effects
• GTMD model predictions for diffractive dijet production at EIC