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Pseudorapidity distributions of charged particles as a function of mid- and forward rapidity multiplicities in pp collisions at √s = 5.02, 7 and 13 TeV

The multiplicity dependence of the pseudorapidity density of charged particles in proton–proton (pp) collisions at centre-of-mass energies √s=5.02, 7 and 13 TeV measured by ALICE is reported. The analysis relies on track segments measured in the midrapidity range (∣η∣<1.5). Results are presented for inelastic events having at least one charged particle produced in the pseudorapidity interval ∣η∣<1. The multiplicity dependence of the pseudorapidity density of charged particles is measured with mid- and forward rapidity multiplicity estimators, the latter being less affected by autocorrelations. A detailed comparison with predictions from the PYTHIA 8 and EPOS LHC event generators is also presented. The results can be used to constrain models for particle production as a function of multiplicity in pp collisions.

charged particle: density ; multiplicity: dependence ; rapidity: density ; p p: scattering ; CERN LHC Coll ; Monte Carlo ; estimator ; tracks ; PYTHIA ; ALICE ; experimental results ; 5020 GeV-cms/nucleon ; 7000 GeV-cms/nucleon ; 13000 GeV-cms/nucleon

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