Central exclusive production of $J/\psi$ and $\psi (2S)$ mesons in $pp$ collisions at $\sqrt{s}=13$TeV

LHCb collaboration, R. Aaij, B. Adeva +808

Measurements are reported of the central exclusive production of \jpsi and \psitwos mesons in $pp$ collisions at a centre-of-mass energy of 13 TeV. Backgrounds are significantly re…