R Aaij, C Abellán Beteta,
T Ackernley, B Adeva… - Physical Review Letters, 2021 - APS
The production of χ c 1 (3872) and ψ (2 S) hadrons is studied as a function of charged
particle multiplicity in pp collisions at a center-of-mass energy of 8 TeV, corresponding to an …