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Charged-particle multiplicity measurement in proton–proton collisions at √s = 7 TeV with ALICE at LHC

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dc.contributor.author The ALICE Collaboration eng
dc.contributor.author Aamodt, K. eng
dc.contributor.author Abel, N. eng
dc.contributor.author Abeysekara, U. eng
dc.contributor.author Alme, Johan eng
dc.contributor.author Bablok, Sebastian Robert eng
dc.contributor.author Fehlker, D. eng
dc.contributor.author Haaland, Øystein Senneset eng
dc.contributor.author Huang, M. eng
dc.contributor.author Larsen, Dag Toppe eng
dc.contributor.author Nystrand, J. eng
dc.contributor.author Ullaland, K. eng
dc.contributor.author Øvrebekk, G. eng
dc.date.accessioned 2011-03-14T08:03:29Z
dc.date.available 2011-03-14T08:03:29Z
dc.date.issued 2010-08-03 eng
dc.identifier.citation The European Physical Journal C 68: 345-354 en_US
dc.identifier.uri http://hdl.handle.net/1956/4579
dc.description There are 1056 authors. Only a few of them have been given the author entries in addition to the Collaboration en_US
dc.description.abstract The pseudorapidity density and multiplicity distribution of charged particles produced in proton–proton collisions at the LHC, at a centre-of-mass energy Ös=7s=7 TeV, were measured in the central pseudorapidity region |η|<1. Comparisons are made with previous measurements at Ös=0.9s=09 TeV and 2.36 TeV. At Ös=7s=7 TeV, for events with at least one charged particle in |η|<1, we obtain dNch/dh = 6.01±0.01(stat.)+0.20-0.12(syst.)dNchd=601001(stat)+020−012(syst). This corresponds to an increase of 57.6%±0.4%(stat.)+3.6-1.8%(syst.)576%04%(stat)+36−18%(syst) relative to collisions at 0.9 TeV, significantly higher than calculations from commonly used models. The multiplicity distribution at 7 TeV is described fairly well by the negative binomial distribution. en_US
dc.language.iso eng eng
dc.publisher Springer en
dc.rights Copyright CERN for the benefit of the ALICE collaboration 2010. This article is published with open access at Springerlink.com eng
dc.rights.uri http://creativecommons.org/licenses/by-nc/2.5/ eng
dc.title Charged-particle multiplicity measurement in proton–proton collisions at √s = 7 TeV with ALICE at LHC en_US
dc.type Peer reviewed eng
dc.type Journal article eng
dc.subject.nsi VDP::Mathematics and natural science: 400 eng
dc.rightsHolder CERN for the benefit of the ALICE collaboration 2010 eng
dc.type.version publishedVersion eng
bora.peerreviewed Peer reviewed eng
bibo.doi http://dx.doi.org/10.1140/epjc/s10052-010-1350-2 eng
dc.identifier.doi http://dx.doi.org/10.1140/epjc/s10052-010-1350-2


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Copyright CERN for the benefit of the ALICE collaboration 2010. This article is published with open access at Springerlink.com Except where otherwise noted, this item's license is described as Copyright CERN for the benefit of the ALICE collaboration 2010. This article is published with open access at Springerlink.com

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