Measurement of J/ψ production as a function of event multiplicity in pp collisions at √s = 13 TeV with ALICE

Abstract

The availability at the LHC of the largest collision energy in pp collisions allows a significant advance in the measurement of J/ψ production as function of event multiplicity. The interesting relative increase observed with data at the LHC at √s = 7 TeV and at RHIC at √s = 0.2 TeV is studied now at unprecedented multiplicities at √s = 13 TeV. The measurement at mid-rapidity in the dielectron channel with ALICE is presented and discussed in comparison to predictions from available theoretical models and to data at lower energies.