Charged-particle multiplicity and transverse energy in Pb-Pb collisions at sqrt(snn) = 2.76 TeV with ALICE

TL;DR

This paper reports measurements of charged-particle multiplicity and transverse energy in lead-lead collisions at 2.76 TeV, comparing results across different energies and models to understand particle production mechanisms.

Contribution

It provides new experimental data on multiplicity and transverse energy at LHC energies and compares these with lower-energy results and theoretical models.

Findings

Multiplicity increases with collision centrality.

Results are consistent with certain particle production models.

Data shows energy dependence of particle yields.

Abstract

The measurements of charged-particle multiplicity and transverse energy at mid-rapidity in Pb-Pb collisions at sqrt(sNN) = 2.76 TeV are reported as a function of centrality. The fraction of the inelastic cross section recorded by the ALICE detector is estimated using a Glauber model. The results scaled by the number of participating nucleons are compared with pp collisions at the same collision energy, to similar results obtained at significantly lower energies, and with models based on different mechanisms for particle production in nuclear collisions.