Production of QED pairs at small impact parameter in relativistic heavy ion collisions

Abstract

The STAR collaboration at RHIC is measuring the production of electron-positron pairs at small impact parameters, larger than but already close to the range, where the ions interact strongly with each other. We calculate the total cross section, as well as, differential distributions of the pair production process with the electromagnetic excitation of both ions in a semiclassical approach and within a lowest order QED calculation. We compare the distribution of electron and positron with the one coming from the cross section calculation without restriction on impact parameter. Finally we give an outlook of possible results at the LHC.

15 pages, 8 figures

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Cited by in corpus (24)

• The Physics of Ultraperipheral Collisions at the LHC
• Physics of Ultra-Peripheral Nuclear Collisions
• Electron-Positron Pair Production in Relativistic Heavy Ion Collisions
• Photonuclear and Two-photon Interactions at High-Energy Nuclear Colliders
• Production of $e^{+}{e}^{-}$ Pairs Accompanied by Nuclear Dissociation in Ultra-Peripheral Heavy Ion Collision
• 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
• Azimuthal Angular Asymmetry of Soft Gluon Radiation in Jet Production
• Initial transverse-momentum broadening of Breit-Wheeler process in relativistic heavy-ion collisions
• Lepton Pair Production Through Two Photon Process in Heavy Ion Collisions
• Impact parameter dependence of the azimuthal asymmetry in lepton pair production in heavy ion collisions
• Mapping the Electromagnetic Fields of Heavy-Ion Collisions with the Breit-Wheeler Process
• Dilepton Radiation in Heavy-Ion Collisions at Small Transverse Momentum
• Momentum Anisotropy of Leptons from Two Photon Processes in Heavy Ion Collisions
• Lepton pair photoproduction in peripheral relativistic heavy-ion collisions
• Evidence for higher order QED in e+ e- pair production at RHIC
• Anomalous magnetohydrodynamics with temperature-dependent electric conductivity and application to the global polarization
• Photoproduction of $e^{+}{e}^{-}$ in peripheral isobar collisions
• Strong suppression of Coulomb corrections to the cross section of e+e- pair production in ultrarelativistic nuclear 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
• Exchange of high and low energy photons in ultraperipheral relativistic heavy-ion collisions
• e+e- pair production in ultrarelativistic heavy-ion collisions at intermediate impact parameters
• Nuclear deformation effects in photoproduction of $\rho$ mesons in ultraperipheral isobaric collisions
• Lepton pair production in ultra-peripheral collisions
• Two-Photon Interactions with Nuclear Breakup in Relativistic Heavy Ion Collisions