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

The collaboration
Phys.Lett.B 810 (2020) 135758, 2020.

Abstract (data abstract)
Measurements of the inclusive \jpsi yield as a function of charged-particle pseudorapidity density \dndeta in pp collisions at \sqrts{13} with ALICE at the LHC are reported. The \jpsi 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 \jpsi yield with normalized \dndeta 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.

• #### dataFig4_SPD

Data from Figure 4, SPD

10.17182/hepdata.96306.v1/t1

$N_{J/psi}/ / N_{ch}/$, $|y^{J/\psi}|<0.9$, $p_{T}^{J/\psi}$ integrated, event selection SPD

• #### dataFig4_V0

Data from Figure 4, V0

10.17182/hepdata.96306.v1/t2

$N_{J/psi}/ / N_{ch}/$, $|y^{J/\psi}|<0.9$, $p_{T}^{J/\psi}$ integrated, event selection V0

• #### dataFig5_SPD_pTlow

Data from Figure 5, SPD (left)

10.17182/hepdata.96306.v1/t3

$N_{J/psi}/ / N_{ch}/$, $|y^{J/\psi}|<0.9$, $p_{T}^{J/\psi}$ 0-4 and 4-8 GeV/c, event selection SPD

• #### dataFig5_SPD_pThigh

Data from Figure 5, SPD (left)

10.17182/hepdata.96306.v1/t4

$N_{J/psi}/ / N_{ch}/$, $|y^{J/\psi}|<0.9$, $p_{T}^{J/\psi}$ 8-15 and 15-40 GeV/c, event selection SPD

• #### dataFig5_V0_pTlow

Data from Figure 5, V0 (right)

10.17182/hepdata.96306.v1/t5

$N_{J/psi}/ / N_{ch}/$, $|y^{J/\psi}|<0.9$, $p_{T}^{J/\psi}$ 0-4 and 4-8 GeV/c, event selection V0

• #### dataFig5_V0_pThigh

Data from Figure 5, V0 (right)

10.17182/hepdata.96306.v1/t6

$N_{J/psi}/ / N_{ch}/$, $|y^{J/\psi}|<0.9$, $p_{T}^{J/\psi}$ 8-15 and 15-40 GeV/c, event selection V0