Title
Charged-particle multiplicity density at midrapidity in central Pb-Pb collisions at √s<inf>NN</inf>=2.76TeV
Date Issued
13 December 2010
Access level
open access
Resource Type
journal article
Author(s)
Aamodt K.
Abelev B.
Abrahantes Quintana A.
Adamová D.
Adare A.M.
Aggarwal M.M.
Aglieri Rinella G.
Agocs A.G.
Aguilar Salazar S.
Ahammed Z.
Ahmad Masoodi A.
Ahmad N.
Ahn S.U.
Akindinov A.
Aleksandrov D.
Alessandro B.
Alfaro Molina R.
Alici A.
Alkin A.
Almaráz Aviña E.
Alt T.
Altini V.
Altinpinar S.
Altsybeev I.
Andrei C.
Andronic A.
Anguelov V.
Anson C.
Antičić T.
Antinori F.
Antonioli P.
Aphecetche L.
Appelshäuser H.
Arbor N.
Arcelli S.
Arend A.
Armesto N.
Arnaldi R.
Aronsson T.
Arsene I.C.
Asryan A.
Augustinus A.
Averbeck R.
Awes T.C.
Aystö J.
Azmi M.D.
Bach M.
Badalà A.
Baek Y.W.
Bagnasco S.
Bailhache R.
Bala R.
Baldini Ferroli R.
Baldisseri A.
Baldit A.
Baltasar Dos Santos Pedrosa F.
Bán J.
Barbera R.
Barile F.
Barnaföldi G.G.
Barnby L.S.
Barret V.
Bartke J.
Basile M.
Bastid N.
Bathen B.
Batigne G.
Batyunya B.
Baumann C.
Bearden I.G.
Beck H.
Belikov I.
Bellini F.
Bellwied R.
Belmont-Moreno E.
Beole S.
Berceanu I.
Bercuci A.
Berdermann E.
Berdnikov Y.
Bergmann C.
Betev L.
Bhasin A.
Bhati A.K.
Bianchi L.
Bianchi N.
Bianchin C.
Bielčík J.
Bielčíková J.
Bilandzic A.
Biolcati E.
Blanc A.
Blanco F.
Blanco F.
Blau D.
Blume C.
Boccioli M.
Bock N.
Bogdanov A.
Bøggild H.
Publisher(s)
American Physical Society
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 √sNN=2.76TeV 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 √sNN=0.2TeV. This measurement provides the first experimental constraint for models of nucleus-nucleus collisions at LHC energies. © 2010 American Physical Society.
Volume
105
Issue
25
Language
English
OCDE Knowledge area
Física de partículas, Campos de la Física
Scopus EID
2-s2.0-78650365433
Source
Physical Review Letters
ISSN of the container
00319007
Sponsor(s)
National Science Foundation - 0968903, 0969966 - NSF
Science and Technology Facilities Council - GRIDPP, ST/F011989/1 - STFC
Japan Society for the Promotion of Science - 20224014 - JSPS
Sources of information:
Directorio de Producción Científica
Scopus