Quarkonia production in (ultra-)peripheral PbPb collisions at LHCb

The cross-sections of coherent $J/\psi$ and $\psi (2S)$ production in ultra-peripheral PbPb collisions at a nucleon-nucleon centre-of-mass energy of $5.02\,\mathrm{TeV}$ are measured using a data sample collected in 2018 at LHCb, and the differential cross-sections are measured separately as a function of transverse momentum and rapidity. The photo-production of $J/\psi$ mesons at low transverse momentum is studied in peripheral PbPb collisions, $J/\psi$ candidates are reconstructed through the prompt decay into $\mu^+\mu^-$ in the rapidity region of $2.0 < y < 4.5$. These results significantly improve previous measurements and are compared to the latest theoretical predictions