Measurement of ${\chi }_{c1}(3872)$ production in proton-proton collisions at $\sqrt{s}=8$ and $13$ TeV

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +997

The production cross-section of the ${\chi }_{c1}(3872)$ state relative to the $\psi (2S)$ meson is measured using proton-proton collision data collected with the LHCb experiment at centre-o…