Probing the gluon tomography in photoproduction of di-pions

Abstract

A sizable $\cos 4\varphi$ azimuthal asymmetry in exclusive di-pion production near ${\rho }^0$ resonance peak in ultraperipheral heavy ion collisions recently has been reported by STAR collaboration. We show that both elliptic gluon Wigner distribution and final state soft photon radiation can give rise to this azimuthal asymmetry. The fact that the QED effect alone severely underestimates the observed asymmetry might signal the existence of the nontrivial correlation in quantum phase distribution of gluons.

7 pages, 3 figures,published version in PRD

References in corpus (27)

• Generalized parton correlation functions for a spin-1/2 hadron
• Analysis of combined HERA data in the Impact-Parameter dependent Saturation model
• Quark Wigner Distributions and Orbital Angular Momentum
• Generalized parton correlation functions for a spin-0 hadron
• Nuclear enhancement and suppression of diffractive structure functions at high energies
• Photonuclear and Two-photon Interactions at High-Energy Nuclear Colliders
• Quantum Interference in Jet Substructure from Spinning Gluons
• Azimuthal Angular Asymmetry of Soft Gluon Radiation in Jet Production
• Accessing the gluon Wigner distribution in ultraperipheral $pA$ collisions
• Diffractive Dijet Production and Wigner Distributions from the Color Glass Condensate
• Probing the linear polarization of photons in ultraperipheral heavy ion collisions
• Lepton Pair Production Through Two Photon Process in Heavy Ion Collisions
• Anisotropy in Dijet Production in Exclusive and Inclusive Processes
• Impact parameter dependence of the azimuthal asymmetry in lepton pair production in heavy ion collisions
• The elliptic gluon GTMD inside a large nucleus
• Observation of Two-source Interference in the Photoproduction Reaction $AuAu\to AuAu{\rho }^0$
• Photoproduction of pi+ pi- pairs in a model with tensor-pomeron and vector-odderon exchange
• The $\cos 2\varphi$ azimuthal asymmetry in ${\rho }^0$ meson production in ultraperipheral heavy ion collisions
• Exploring the double-slit interference with linearly polarized photons
• Di-lepton production from a single photon in strong magnetic fields: Vacuum dichroism
• Momentum Anisotropy of Leptons from Two Photon Processes in Heavy Ion Collisions
• Centrality dependence of dilepton production via $\gamma \gamma$ processes from Wigner distributions of photons in nuclei
• Spin-dependent Pomeron and Odderon in elastic proton-proton scattering
• Sub-threshold $J/\psi$ and ${\rm Y}$ Production in $\gamma A$ Collisions
• Chirality Production with Mass Effects-Schwinger Pair Production and the Axial Ward Identity
• Coulomb nuclear interference effect in dipion production in ultraperipheral heavy ion collisions
• Factorization and transverse phase-space parton distributions

Cited by in corpus (10)

• Nucleon Energy Correlators for the Color Glass Condensate
• Signature of the gluon orbital angular momentum
• Harmonics of Parton Saturation in Lepton-Jet Correlations at the EIC
• Energy evolution of T-odd gluon TMDs at small $x$
• Azimuthal asymmetries of muon pair production in ultraperipheral heavy ion collisions
• Photoproduction of $e^{+}{e}^{-}$ in peripheral isobar collisions
• Measurement of the impact-parameter dependent azimuthal anisotropy in coherent ${\rho }^0$ photoproduction in Pb$-$Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• Probing Quantum Phenomena through Photoproduction in Relativistic Heavy-Ion Collisions
• Constraining axion-gluon coupling in monohadron processes
• Nuclear deformation effects in photoproduction of $\rho$ mesons in ultraperipheral isobaric collisions