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Title
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Charged particle multiplicities at =0.9, 2.36 and 7.0 TeV with the CMS detector at LHC
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Author
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Abstract
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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 root s = 0.9, 2.36, and 7TeV, in five pseudorapidity ranges from vertical bar eta vertical bar < 0.5 to vertical bar eta vertical bar < 2.4. The data were collected with the minimum- bias trigger of the CMS experiment during the LHC commissioning runs in 2009 and the 7TeV run in 2010. The multiplicity distribution at root s = 0.9TeV is in agreement with previous measurements. At higher energies the increase of the mean multiplicity with ps 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 the Koba-Nielsen-Olesen scaling that has been observed at lower energies. |
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Language
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English
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Source (journal)
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35TH INTERNATIONAL CONFERENCE OF HIGH ENERGY PHYSICS (ICHEP 2010)
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Source (book)
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35th International Conference of High Energy Physics (ICHEP), JUL 22-28, 2010, Paris, FRANCE
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Publication
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Trieste
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Scuola int superiore studi avanzati-sissa
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2010
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DOI
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10.22323/1.120.0358
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Volume/pages
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(2010)
, 4 p.
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Article Reference
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UNSP 358
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ISI
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000392111500304
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Medium
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E-only publicatie
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Full text (open access)
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