Centrality Dependence of the Charged-Particle Multiplicity Density at Midrapidity in Pb-Pb Collisions at root s(NN)=2.76 TeV

Journal Article · Sat Jan 01 00:00:00 EST 2011 · Physical Review Letters

OSTI ID:1037061

Aamodt, K ^[1]; Awes, Terry C ^[2]

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1. University of Oslo, Norway
2. ORNL

The centrality dependence of the charged-particle multiplicity density at midrapidity in Pb-Pb collisions at {radical}s{sub NN} = 2.76 TeV is presented. The charged-particle density normalized per participating nucleon pair increases by about a factor of 2 from peripheral (70%-80%) to central (0%-5%) collisions. The centrality dependence is found to be similar to that observed at lower collision energies. The data are compared with models based on different mechanisms for particle production in nuclear collisions.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 1037061
• Journal Information: Physical Review Letters, Vol. 106, Issue 3; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
MULTIPLICITY
NUCLEONS
PARTICLE PRODUCTION