University of Sussex
Browse

File(s) not publicly available

Charged-particle multiplicities in pp interactions at sqrt(s) = 900 GeV measured with the ATLAS detector at the LHC

journal contribution
posted on 2023-06-08, 06:40 authored by Antonella De SantoAntonella De Santo, Fabrizio SalvatoreFabrizio Salvatore, ATLAS Collaboration
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 |¿|<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 ¿=0 is measured to be 1.333±0.003(stat.)±0.040(syst.), which is 5¿15% higher than the Monte Carlo models predict.

History

Publication status

  • Published

Journal

Physics Letters B

ISSN

0370-2693

Issue

1

Volume

688

Page range

21-42

Pages

22.0

Department affiliated with

  • Physics and Astronomy Publications

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2012-02-06

Usage metrics

    University of Sussex (Publications)

    Categories

    No categories selected

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC