Cover Image

Charged-particle multiplicity measurement in proton–proton collisions at √s=0.9 and 2.36 TeV with ALICE at LHC

Show other versions (293)

Charged-particle production was studied in proton–proton collisions collected at the LHC with the ALICE detector at centre-of-mass energies 0.9 TeV and 2.36 TeV in the pseudorapidity range |η|<1.4. In the central region (|η|<0.5), at 0.9 TeV, we measure charged-particle pseudorapidity density...

Full description

Saved in:
Bibliographic Details
Main Authors: Aamodt, Kenneth (Author) , Angelov, Venelin (Author) , Busch, Oliver (Author) , Glässel, Peter (Author) , Grajcarek, Robert (Author) , Herrmann, Norbert (Author) , Klein, Jochen (Author) , Mercado Pérez, Jorge (Author) , Oyama, Ken (Author) , Pachmayer, Yvonne C. (Author) , Schicker, Rainer (Author) , Schweda, Kai (Author) , Soltveit, Hans Kristian (Author) , Stachel, Johanna (Author) , Vallero, Sara (Author) , Windelband, Bernd (Author)
Corporate Author: ALICE (Author)
Format: Article (Journal)
Language:English
Published: 12 June 2010
In: The European physical journal. C, Particles and fields
Year: 2010, Volume: 68, Pages: 89-108
ISSN:1434-6052
DOI:10.1140/epjc/s10052-010-1339-x
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1140/epjc/s10052-010-1339-x
Get full text
Author Notes:The ALICE Collaboration*
Description
Summary:Charged-particle production was studied in proton–proton collisions collected at the LHC with the ALICE detector at centre-of-mass energies 0.9 TeV and 2.36 TeV in the pseudorapidity range |η|<1.4. In the central region (|η|<0.5), at 0.9 TeV, we measure charged-particle pseudorapidity density dNch/dη=3.02±0.01(stat.)+0.08−0.05(syst.) for inelastic interactions, and dNch/dη=3.58±0.01(stat.)+0.12−0.12(syst.) for non-single-diffractive interactions. At 2.36 TeV, we find dNch/dη=3.77±0.01(stat.)+0.25−0.12(syst.) for inelastic, and dNch/dη=4.43±0.01(stat.)+0.17−0.12(syst.) for non-single-diffractive collisions. The relative increase in charged-particle multiplicity from the lower to higher energy is 24.7%±0.5%(stat.)+5.7−2.8%(syst.) for inelastic and 23.7%±0.5%(stat.)+4.6−1.1%(syst.) for non-single-diffractive interactions. This increase is consistent with that reported by the CMS collaboration for non-single-diffractive events and larger than that found by a number of commonly used models. The multiplicity distribution was measured in different pseudorapidity intervals and studied in terms of KNO variables at both energies. The results are compared to proton–antiproton data and to model predictions.
Item Description:Im Titel steht der Buchstabe s unter dem Wurzelsymbol
*The ALICE Collaboration: K. Aamodt, V. Angelov, O. Busch, P. Glässel, R. Grajcarek, N. Herrmann, J. Klein, J. Mercado Pérez, K. Oyama, Y. Pachmayer, R. Schicker, K. Schweda, H.K. Soltveit, J. Stachel, S. Vallero, B. Windelband [und sehr viele weitere Personen]
Gesehen am 14.11.2022
Physical Description:Online Resource
ISSN:1434-6052
DOI:10.1140/epjc/s10052-010-1339-x

Similar Items