Pseudorapidity density of charged particles and its centrality dependence in Pb-Pb collisions at sNN=2.76TeV

We present the measurement of the charged-particle pseudorapidity (η) density distribution, dNchdη, for a number of centrality bins in Pb-Pb collisions at sNN=2.76TeV over a wide pseudorapidity range. Using the innermost pixel layers of the ALICE tracking system and the ALICE forward detectors (VZERO and FMD), we cover the pseudorapidity range: −5<η<5.5. The analysis is performed using a dedicated technique utilizing the collisions with LHC 'satellite' bunches. These collisions have displaced vertices in the range −187.5