Coherent J/ photoproduction at forward rapidity in ultra-peripheral Pb–Pb collisions at TeV

The ALICE collaboration performed the first rapidity-differential measurement of coherent $J/\psi $ photoproduction in ultra-peripheral Pb–Pb collisions at a center-of-mass energy $\sqrt{{s}_{\mathrm{NN}}}\phantom{\rule{0.25em}{0ex}}=\phantom{\rule{0.25em}{0ex}}5.02$ TeV. The $J/\psi $ is detected via its dimuon decay in the forward rapidity region ($-4.0