Computes two-photon couplings of scalar and tensor fully-charmed tetraquarks via NRQCD from recent four-body wave functions and finds resonant terms dominate J/ψJ/ψ but not diphoton production in UPCs, disagreeing with naive vector dominance.
Exclusive Hadron Production in Two Photon Reactions
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Two photon decay width of the fully charmed tetraquarks: revisiting prospects for ultraperipheral collisions
Computes two-photon couplings of scalar and tensor fully-charmed tetraquarks via NRQCD from recent four-body wave functions and finds resonant terms dominate J/ψJ/ψ but not diphoton production in UPCs, disagreeing with naive vector dominance.