Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-58842
CMS Collaboration; Amsler, C; Chiochia, V; Snoek, H; Favaro, C; Verzetti, M; Storey, J; Aguiló, E; Schmitt, A; De Visscher, S; Otyugova, P; Millan, B; Ivova, M; et al (2011). Charged particle multiplicities in pp interactions at √s = 0.9, 2.36, and 7 TeV. Journal of High Energy Physics, (1):79.
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Measurements of primary charged hadron multiplicity distributions are presented for non-single-diffractive events in proton-proton collisions at centre-of-mass energies of sqrt(s) = 0.9, 2.36, and 7 TeV, in five pseudorapidity ranges from |eta|<0.5 to |eta|<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 sqrt(s) = 0.9 TeV is in agreement with previous measurements. At higher energies the increase of the mean multiplicity with sqrt(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.
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|Other titles:||Charged particle multiplicities in pp interactions at sqrt(s) = 0.9, 2.36, and 7 TeV|
|Item Type:||Journal Article, refereed, original work|
|Communities & Collections:||07 Faculty of Science > Physics Institute|
|Dewey Decimal Classification:||530 Physics|
|Deposited On:||14 Feb 2012 18:41|
|Last Modified:||13 Jun 2014 13:06|
|Additional Information:||The original publication is available at www.springerlink.com|
|Free access at:||Publisher DOI. An embargo period may apply.|
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