Central Exclusive Production at LHCb

Abstract

Central Exclusive Production (CEP) is a unique process at hadron machines in which particles are produced via colourless propagators. LHCb have measured the cross-sections for the CEP of vector mesons, $J/\psi ,\psi (2S),{\rm Y}(1S),{\rm Y}(2S)$ and ${\rm Y}(3S)$, which are photo-produced. In the double pomeron exchange process, preliminary measurements have been made of ${\chi }_{c0},{\chi }_{c1},{\chi }_{c2}$ meson production while the first observations of the CEP of pairs of charmonia, $J/\psi J/\psi$ and $J/\psi \psi (2S)$, have been made and limits obtained on the pair production of other charmonia.

Presented at XXIV International Workshop on Deep-Inelastic Scattering and Related Subjects, 11-15 April, 2016, DESY Hamburg, Germany