Centrality dependence of dilepton production via $\gamma \gamma$ processes from Wigner distributions of photons in nuclei

Abstract

We propose a new complete method, based on the Wigner distributions of photons, how to calculate differential distributions of dileptons created via photon-photon fusion in semicentral ($b<2R_A$) $AA$ collisions. The formalism is used to calculate different distributions of invariant mass, dilepton transverse momentum and acoplanarity for different regions of centrality. The results of calculation are compared with recent STAR, ALICE and ATLAS experimental data. Very good agreement with the data is achieved without free parameters and without including additional mechanisms such as a possible rescattering of leptons in the quark-gluon plasma.

arXiv comment14 pages, 6 figures

References in corpus (20)

• Glauber Modeling in High Energy Nuclear Collisions
• Physics of Ultra-Peripheral Nuclear Collisions
• Coherent gamma-gamma and gamma-A interactions in very peripheral collisions at relativistic ion colliders
• STARlight: A Monte Carlo simulation program for ultra-peripheral collisions of relativistic ions
• Measurement of an excess in the yield of J/$\psi$ at very low $p_{\mathrm{T}}$ in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Photonuclear and Two-photon Interactions at High-Energy Nuclear Colliders
• Low-$p_T$ $e^{+}{e}^{-}$ pair production in Au$+$Au collisions at $\sqrt{s_{NN}}$ = 200 GeV and U$+$U collisions at $\sqrt{s_{NN}}$ = 193 GeV at STAR
• Initial transverse-momentum broadening of Breit-Wheeler process in relativistic heavy-ion collisions
• Observation of centrality-dependent acoplanarity for muon pairs produced via two-photon scattering in Pb+Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV with the ATLAS detector
• Lepton Pair Production Through Two Photon Process in Heavy Ion Collisions
• Acoplanarity of Lepton Pair to Probe the Electromagnetic Property of Quark Matter
• Impact parameter dependence of the azimuthal asymmetry in lepton pair production in heavy ion collisions
• Exclusive muon-pair productions in ultrarelativistic heavy-ion collisions: Realistic nucleus charge form factor and differential distributions
• Exclusive dimuon production in ultraperipheral Pb+Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV with ATLAS
• Photoproduction of $J/\psi$ mesons in peripheral and semi-central heavy ion collisions
• Exclusive dilepton production in ultraperipheral $PbPb$ collisions at the LHC
• Dilepton Radiation in Heavy-Ion Collisions at Small Transverse Momentum
• Electromagnetic excitation of nuclei and neutron evaporation in ultrarelativistic ultraperipheral heavy ion collisions
• Electromagnetic probes
• Electromagnetic Probes

Cited by in corpus (14)

• Properties of the QCD Matter -- An Experimental Review of Selected Results from RHIC BES Program
• Azimuthal Angular Asymmetry of Soft Gluon Radiation in Jet Production
• Mapping the Electromagnetic Fields of Heavy-Ion Collisions with the Breit-Wheeler Process
• Report on Progress in Physics: Observation of the Breit-Wheeler Process and Vacuum Birefringence in Heavy-Ion Collisions
• Lepton pair photoproduction in peripheral relativistic heavy-ion collisions
• Probing the gluon tomography in photoproduction of di-pions
• Energy Dependence of the Breit-Wheeler process in Heavy-Ion Collisions and its Application to Nuclear Charge Radius Measurements
• Azimuthal asymmetries of muon pair production in ultraperipheral heavy ion collisions
• Measurement of muon pairs produced via $\gamma \gamma$ scattering in non-ultraperipheral Pb+Pb collisions at $\sqrt{s_{{}_{\mathrm{NN}}}}=5.02$ TeV with the ATLAS detector
• Exclusive dilepton production via timelike Compton scattering in heavy ion collisions
• Dielectron production at midrapidity at low transverse momentum in peripheral and semi-peripheral Pb$-$Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
• Electromagnetic interaction of low transverse momentum electrons and positrons with heavy nuclei in ultra-peripheral ultra-relativistic heavy-ion collisions
• DPS mechanism for associated $c\bar{c}{l}^{+}{l}^{-}$ production in $AA$ UPCs as a probe for photon density inside the nucleus
• Photoproduction of lepton pair in ultra-relativistic heavy-ion collisions