Multiplicity dependence of $\ddot{I}{ƒ}_{\ddot{I}ˆ(2S)}/\ddot{I}{ƒ}_{J/\ddot{I}ˆ}$ in $pp$ collisions at $\sqrt{s}=13$ TeV

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1087

The ratio of production cross-sections of $\ddot{I}ˆ(2S)$ over $J/\ddot{I}ˆ$ mesons as a function of charged-particle multiplicity in proton-proton collisions at a centre-of-mass energy $\sqrt{s…