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Charged-Particle Multiplicity Density at Midrapidity in Central Pb-Pb Collisions at root s(NN)=2.76 TeV

Aamodt K.
•
Abelev B.
•
Abrahantes Quintana A.
altro
Zynovyev M.
2010
  • journal article

Periodico
PHYSICAL REVIEW LETTERS
Abstract
The first measurement of the charged-particle multiplicity density at midrapidity in Pb-Pb collisions at a center-of-mass energy per nucleon pair root s(NN) = 2.76 TeV is presented. For an event sample corresponding to the most central 5% of the hadronic cross section, the pseudorapidity density of primary charged particles at midrapidity is 1584 +/- 4(stat) +/- 76(syst), which corresponds to 8.3 +/- 0.4(syst) per participating nucleon pair. This represents an increase of about a factor 1.9 relative to pp collisions at similar collision energies, and about a factor 2.2 to central Au-Au collisions at root s(NN) = 0.2 TeV. This measurement provides the first experimental constraint for models of nucleus-nucleus collisions at LHC energies.
DOI
10.1103/PhysRevLett.105.252301
WOS
WOS:000286750400007
Archivio
http://hdl.handle.net/11390/1125231
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-78650365433
Diritti
metadata only access
Scopus© citazioni
369
Data di acquisizione
Jun 2, 2022
Vedi dettagli
Web of Science© citazioni
272
Data di acquisizione
Mar 13, 2024
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