CERN Accelerating science

Article
Report number arXiv:1003.3124 ; CERN-PH-EP-2010-004 ; CERN-PH-EP-2010-004
Title Charged-particle multiplicities in pp interactions at s = 900 GeV measured with the ATLAS detector at the LHC
Related titleCharged-particle multiplicities in pp interactions at sqrt(s) = 900 GeV measured with the ATLAS detector at the LHC
Author(s) ATLAS Collaboration  Zeige alle 3221 Autoren
Publication 2010
Imprint 29 Apr 2010
Number of pages 40
Note Comments: 40 pages (pages 24-40 appendix with ATLAS collaboration author list), 4 figures.
40 pages (pages 24-40 appendix with ATLAS collaboration author list), 4 figures. The data points are in the HEP-data database at: http://hepdata.cedar.ac.uk/View/8591806
In: Phys. Lett. B 688 (2010) 21-42
DOI 10.1016/j.physletb.2010.03.064
Subject category Particle Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; ATLAS
Abstract The first measurements from proton-proton collisions recorded with the ATLAS detector at the LHC are presented. Data were collected in December 2009 using a minimum-bias trigger during collisions at a centre-of-mass energy of 900 GeV. The charged-particle multiplicity, its dependence on transverse momentum and pseudorapidity, and the relationship between mean transverse momentum and charged-particle multiplicity are measured for events with at least one charged particle in the kinematic range |eta|<2.5 and pT>500 MeV. The measurements are compared to Monte Carlo models of proton-proton collisions and to results from other experiments at the same centre-of-mass energy. The charged-particle multiplicity per event and unit of pseudorapidity at eta = 0 is measured to be 1.333 +/- 0.003 (stat.) +/- 0.040 (syst.), which is 5-15% higher than the Monte Carlo models predict.
Copyright/License preprint: © 2010-2024 CERN (License: CC-BY-3.0)
publication: © 2010-2024 CERN (License: CC-BY-3.0)



Corresponding record in: Inspire
Email contact: klaus.moenig@cern.ch


 Datensatz erzeugt am 2010-03-17, letzte Änderung am 2024-07-10


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