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# Multiplicity of charged particles in Pb-Pb collisions at SPS energies

Abstract : The multiplicity of charged particles in the central rapidity region has been measured by the NA57 experiment in Pb--Pb collisions at the CERN SPS at two beam momenta: 158 A GeV/{\it c} and 40 A GeV/{\it c}. The value of $dN_{ch}/d\eta$ at the maximum has been determined and its behaviour as a function of centrality has been studied in the centrality range covered by NA57 (about 50% of the inelastic cross section). The multiplicity increases approximately logarithmically with the centre of mass energy.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00023205
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Submitted on : Tuesday, October 12, 2004 - 8:04:31 AM
Last modification on : Thursday, April 23, 2020 - 2:26:21 PM

### Citation

F. Antinori, P. Bacon, A. Badala, R. Barbera, A. Belogianni, et al.. Multiplicity of charged particles in Pb-Pb collisions at SPS energies. Journal of Physics G: Nuclear and Particle Physics, IOP Publishing, 2005, 31, pp.321-335. ⟨10.1088/0954-3899/31/5/004⟩. ⟨in2p3-00023205⟩

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