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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
dc.contributor.author Aamodt, K.
dc.contributor.author Abel, N.
dc.contributor.author Abeysekara, U.
dc.contributor.author Alme, Johan
dc.contributor.author Bablok, Sebastian Robert
dc.contributor.author Fehlker, D.
dc.contributor.author Haaland, Øystein Senneset
dc.contributor.author Huang, M.
dc.contributor.author Larsen, Dag Toppe
dc.contributor.author Nystrand, J.
dc.contributor.author Ullaland, K.
dc.contributor.author Øvrebekk, G.
dc.date.accessioned 2011-03-14T08:03:29Z
dc.date.available 2011-03-14T08:03:29Z
dc.date.issued 2010-08-03
dc.identifier.citation The European Physical Journal C 68: 345-354 en_US
dc.identifier.uri http://dx.doi.org/10.1140/epjc/s10052-010-1350-2
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 en_US
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 en_US
dc.rights.uri http://creativecommons.org/licenses/by-nc/2.5/ en_US
dc.title Charged-particle multiplicity measurement in proton–proton collisions at √s = 7 TeV with ALICE at LHC en_US
dc.type Peer reviewed en
dc.type Journal article en
dc.subject.nsi VDP::Mathematics and natural science: 400 en_US
dc.rightsHolder CERN for the benefit of the ALICE collaboration 2010 en_US
dc.type.version publishedVersion en_US


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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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