# Centrality dependence of the charged-particle multiplicity density at mid-rapidity in Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 5.02 TeV

Submission Date:
18/12/2015
Article Information
Submission Form
System:
Pb-Pb
Energy:
5.02 TeV
Abstract Plain Text:
The pseudorapidity density of charged particles (\dNdeta) in \PbPb~collisions at a centre-of-mass energy per nucleon pairs, \snn\, of 5.02 TeV has been measured as a function of centrality and reaches a value of \valuecent\ in the most central, 0-5\%, collisions. The rise of \dNdeta\ for the most as a function of \snn\ for the most central collisions increases more steeply than the same quantity in minimum-bias inelastic proton-proton collisions. The values of \dNdeta\ as a function of the number of participant nucleon pairs, \Npart, calculated in a Glauber model, are compared with a previous measurement at lower energy. An constant factor of \factorrunIrunII\ can describe the increase in \dNdetape\ from \snn\ = 2.76 TeV to \snn\ = 5.02  TeV for all measured centrality intervals, within the measured range of 0-80\%.