Charged-particle multiplicity distributions over a wide pseudorapidity range in p-Pb collisions at ${\sqrt{\mathbf{s}}}_{\mathrm{NN}}=5.02$ TeV

Abstract

This paper presents the primary charged-particle multiplicity distributions in proton-lead collisions at a centre-of-mass energy per nucleon-nucleon collision of $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV. The distributions are reported for non-single diffractive collisions in different pseudorapidity ranges. The measurements are performed using the combined information from the Silicon Pixel Detector and the Forward Multiplicity Detector of ALICE. The multiplicity distributions are parametrised with a double negative binomial distribution function which provides satisfactory descriptions of the distributions for all the studied pseudorapidity intervals. The data are compared to models and analysed quantitatively, evaluating the first four moments (mean, standard deviation, skewness, and kurtosis). The shape evolution of the measured multiplicity distributions is studied in terms of KNO variables and it is found that none of the considered models reproduces the measurements. This paper also reports on the average charged-particle multiplicity, normalised by the average number of participating nucleon pairs, as a function of the collision energy. The multiplicity results are then compared to measurements made in proton-proton and nucleus-nucleus collisions across a wide range of collision energies.

24 pages, 6 captioned figures, 1 table, authors from page 18, figures at http://alice-publications.web.cern.ch/node/11892

References in corpus (31)

• Performance of the ALICE Experiment at the CERN LHC
• Long-range angular correlations on the near and away side in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• Observation of long-range near-side angular correlations in proton-lead collisions at the LHC
• Fluctuating Glasma initial conditions and flow in heavy ion collisions
• Multiple Parton Scattering in Nuclei: Parton Energy Loss
• Observation of Associated Near-side and Away-side Long-range Correlations in sqrt(s_NN)=5.02 TeV Proton-lead Collisions with the ATLAS Detector
• Centrality determination of Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV with ALICE
• Performance of the ALICE VZERO system
• Charged-particle multiplicity density at mid-rapidity in central Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Alignment of the ALICE Inner Tracking System with cosmic-ray tracks
• Event-by-event gluon multiplicity, energy density and eccentricities at RHIC and LHC
• Charged-particle multiplicity measurement in proton-proton collisions at $\sqrt{s}$ = 7 TeV with ALICE at LHC
• Phobos results on charged particle multiplicity and pseudorapidity distributions in Au+Au, Cu+Cu, d+Au, and p+p collisions at ultra-relativistic energies
• Centrality dependence of particle production in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$= 5.02 TeV
• Charged-particle multiplicity measurement in proton-proton collisions at $\sqrt{s}$ = 0.9 and 2.36 TeV with ALICE at LHC
• Centrality dependence of the pseudorapidity density distribution for charged particles in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• The Angantyr model for Heavy-Ion Collisions in PYTHIA8
• Pseudorapidity density of charged particles in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
• The Color Glass Condensate and High Energy Scattering in QCD
• The ALICE experiment: a journey through QCD
• The Monte Carlo Event Generator DPMJET-III
• Charged-particle multiplicities in proton-proton collisions at $\sqrt{s}$ = 0.9 to 8 TeV
• Centrality dependence of the pseudorapidity density distribution for charged particles in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
• Coherent QCD multiple scattering in proton-nucleus collisions
• Multiplicity distributions in p+p, p+A and A+A collisions from Yang-Mills dynamics
• Centrality evolution of the charged-particle pseudorapidity density over a broad pseudorapidity range in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Negative binomial multiplicity distribution in proton-proton collisions in limited pseudorapidity intervals at LHC up to sqrt (s) = 7 TeV and the clan model
• Possible scenarios for soft and semi-hard components structure in central hadron-hadron collisions in the TeV region: pseudo-rapidity intervals
• Charged-particle pseudorapidity density at mid-rapidity in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 8.16 TeV
• Pseudorapidity distributions of charged hadrons in proton-lead collisions at $\sqrt{s_{{}_{\mathrm{NN}}}}=$ 5.02 and 8.16 TeV
• System-size dependence of the charged-particle pseudorapidity density at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV for pp, p-Pb, and Pb-Pb collisions