Charged-particle multiplicities in pp interactions at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:msqrt><mml:mi>s</mml:mi></mml:msqrt><mml:mo>=</mml:mo><mml:mn>900</mml:mn><mml:mtext> GeV</mml:mtext></mml:math> measured with the ATLAS detector at the LHC

DOI DOI HANDLE HANDLE HANDLE ほか18件をすべて表示 一部だけ表示 研究データあり 被引用文献5件 オープンアクセス

書誌事項

公開日
2010-04
権利情報
  • https://www.elsevier.com/tdm/userlicense/1.0/
  • https://www.elsevier.com/legal/tdmrep-license
  • http://creativecommons.org/licenses/by-nc-nd/3.0/
DOI
  • 10.1016/j.physletb.2010.03.064
  • 10.48550/arxiv.1003.3124
公開者
Elsevier BV

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説明

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.

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

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