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Coherent Vector Meson Photoproduction with Nuclear Breakup in Relativistic Heavy Ion Collisions
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Relativistic heavy ions are copious sources of virtual photons. The large photon flux gives rise to a substantial photonuclear interaction probability at impact parameters where no hadronic interactions can occur. Multiple photonuclear interactions in a single collision are possible. In this letter, we use mutual Coulomb excitation of both nuclei as a tag for moderate impact parameter collisions. We calculate the cross section for coherent vector meson production accompanied by mutual excitation, and show that the median impact parameter is much smaller than for untagged production. The vector meson rapidity and transverse momentum distribution are very different from untagged exclusive vector meson production.
Forward citations
Cited by 3 Pith papers
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Measurement of coherent exclusive $J/\psi\to\mu^+\mu^-$ production in ultraperipheral Pb+Pb collisions at $\sqrt{s_{\textrm{NN}}}=5.36$ TeV with the ATLAS detector
ATLAS reports differential cross sections for coherent exclusive J/ψ → μ⁺μ⁻ in Pb+Pb ultraperipheral collisions at √s_NN=5.36 TeV, agreeing with models but in tension with prior Run 2 data at central rapidity.
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Inclusive photoproduction of vector quarkonium in ultra-peripheral collisions at the LHC
Inclusive photoproduction of J/psi mesons in proton-lead collisions at the LHC can likely be separated from hadronic background using centrality, rapidity-gap, and forward-neutron veto selections, extending the measur...
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Ultra-peripheral Collisions
Ultra-peripheral collisions of heavy ions are reviewed as the energy frontier for photon physics; the paper consolidates a decade of LHC/RHIC results and proposes no new measurement.
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