Energy and centrality dependence of particle multiplicity in heavy ion collisions from $\sqrt{s_{{}_{NN}}}$ = 20 to 2760 GeV

Abstract

The centrality dependence of midrapidity charged-particle multiplicities at a nucleon-nucleon center-of-mass energy of 2.76 TeV from CMS are compared to PHOBOS data at 200 and 19.6 GeV. The results are first fitted with a two-component model which parameterizes the separate contributions of nucleon participants and nucleon-nucleon collisions. A more direct comparison involves ratios of multiplicity densities per participant pair between the different collision energies. The results support and extend earlier indications that the influences of centrality and collision energy on midrapidity charged-particle multiplicities are to a large degree independent.

5 pages, 2 figures, 1 table, Replaced with published version, v3 has fixed typo

References in corpus (3)

• Phobos results on charged particle multiplicity and pseudorapidity distributions in Au+Au, Cu+Cu, d+Au, and p+p collisions at ultra-relativistic energies
• Transverse-energy distributions at midrapidity in $p$$+$$p$, $d$$+$Au, and Au$+$Au collisions at $\sqrt{s_{{}_{NN}}}=62.4$--200~GeV and implications for particle-production models
• Scaling properties in bulk and p${}_{\mathrm{T}}$-dependent particle production near midrapidity in relativistic heavy ion collisions

Cited by in corpus (5)

• Extracting kinetic freeze-out temperature and radial flow velocity from an improved Tsallis distribution
• Tests of constituent-quark generation methods which maintain both the nucleon center of mass and the desired radial distribution in Monte Carlo Glauber models
• Beam energy dependence of pseudorapidity distributions of charged particles produced in heavy-ion collisions at RHIC and LHC energies
• Energy and Centrality dependence of $d{N}_{\mathrm{ch}}/d\eta$ and $d{E}_{\mathrm{T}}/d\eta$ in Heavy-Ion Collisions from $\sqrt{s_{\mathrm{NN}}}$ =7.7 GeV to 5.02 TeV
• Comprehending particle production at RHIC and LHC energies using global measurements