Larger neutron skin produces a smoother nuclear color-density profile that suppresses coherent J/ψ photoproduction at large |t| while enhancing incoherent production, making the incoherent-to-coherent cross-section ratio a robust observable for constraining neutron-skin thickness.
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Probing the neutron-skin thickness through $J/\psi$ photoproduction in ultra-peripheral collisions
Larger neutron skin produces a smoother nuclear color-density profile that suppresses coherent J/ψ photoproduction at large |t| while enhancing incoherent production, making the incoherent-to-coherent cross-section ratio a robust observable for constraining neutron-skin thickness.