Proposes searching for GeV-scale ALPs in ultra-peripheral collisions at RHIC via γγ → a → γγ, estimating sensitivity to m_a ~2-5 GeV and g_aγγ ≳4e-4 GeV^{-1} with existing PHENIX data.
Khatun (ALICE), UPC physics with ALICE in Run 3, Phys
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Searches for GeV-Scale ALPs at RHIC
Proposes searching for GeV-scale ALPs in ultra-peripheral collisions at RHIC via γγ → a → γγ, estimating sensitivity to m_a ~2-5 GeV and g_aγγ ≳4e-4 GeV^{-1} with existing PHENIX data.