Quarkonia production in ultra-peripheral PbPb collisions at LHCb
Abstract
Measurements of coherent charmonium production cross sections together with their ratio in ultra-peripheral PbPb collisions are studied at a nucleon-nucleon centre-of-mass energy of 5.02\,TeV, the differential cross-sections are measured as a function of rapidity and transverse momentum, separately. The photo-production of mesons at low transverse momentum is studied in peripheral PbPb collisions, which confirms coherent production in hadronic collisions. These latest results significantly improve previous measurements and are compared with some theoretical predictions.
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