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# Multiplicity dependence of J/$$\psi$$ production at midrapidity in pp collisions at $$\sqrt{s}$$ = 13 TeV

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### Abstract

Measurements of the inclusive J/$$\psi$$ yield as a function of charged-particle pseudorapidity density $$\rm{d}N_\rm{ch}/\rm{d}\eta$$ in pp collisions at $$\sqrt{s}$$ = 13 TeV with ALICE at the LHC are reported. The J/$$\psi$$ meson yield is measured at midrapidity ($$|y|<0.9$$) in the dielectron channel, for events selected based on the charged-particle multiplicity at midrapidity ($$|\eta|<1$$) and at forward rapidity ($$-3.7<\eta<-1.7$$ and $$2.8<\eta<5.1$$); both observables are normalized to their corresponding averages in minimum bias events. The increase of the normalized J/$$\psi$$ yield with normalized $$\rm{d}N/\rm{d}\eta$$ is significantly stronger than linear and dependent on the transverse momentum. The data are compared to theoretical predictions, which describe the observed trends well, albeit not always quantitatively.

### Author and article information

###### Journal
22 May 2020
###### Article
2005.11123