Title
Charged particle multiplicities in pp interactions at <tex>$\sqrt{s}$</tex>=09 , 2.36, and 7 TeV Charged particle multiplicities in pp interactions at <tex>$\sqrt{s}$</tex>=09 , 2.36, and 7 TeV
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Bristol ,
Subject
Physics
Source (journal)
Journal of high energy physics. - Bristol
Volume/pages
(2011) :1 , p. 079,1-079,38
ISSN
1126-6708
1029-8479
ISI
000287937900001
Carrier
E-only publicatie
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Measurements of primary charged hadron multiplicity distributions are presented for non-single-diffractive events in proton-proton collisions at centre-of-mass energies of s=09 , 2.36, and 7 TeV, in five pseudorapidity ranges from |η| < 0.5 to |η| < 2.4. The data were collected with the minimum-bias trigger of the CMS experiment during the LHC commissioning runs in 2009 and the 7 TeV run in 2010. The multiplicity distribution at s=09TeV is in agreement with previous measurements. At higher energies the increase of the mean multiplicity with s is underestimated by most event generators. The average transverse momentum as a function of the multiplicity is also presented. The measurement of higher-order moments of the multiplicity distribution confirms the violation of Koba-Nielsen-Olesen scaling that has been observed at lower energies.
E-info
https://repository.uantwerpen.be/docman/iruaauth/adfada/65947bbbad2.pdf
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