Khachatryan, V. ; Sirunyan, A. M. ; Tumasyan, A. ; Adam, W. ; Bergauer, T. ; Mondal, N. K. ; et., al (2011) Charged particle multiplicities in pp interactions at √s= 0.9, 2.36, and 7 TeV Journal of High Energy Physics, 2011 (1). p. 79. ISSN 1126-6708
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Official URL: http://www.springerlink.com/content/m3vq43g54444l1...
Related URL: http://dx.doi.org/10.1007/JHEP01(2011)079
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 = 0.9s=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 = 0.9 TeV s=09 TeV 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.
Item Type: | Article |
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Source: | Copyright of this article belongs to Institute of Physics. |
Keywords: | Hadron-Hadron Scattering |
ID Code: | 88127 |
Deposited On: | 27 Mar 2012 08:21 |
Last Modified: | 27 Mar 2012 08:21 |
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