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

ISSN
0370-2693
Date Issued
2010
Author(s)
Aad, G.
Abbott, B.
Abdallah, J.
Abdelalim, A.A.
Abdesselam, A.
Abdinov, O.
Abi, B.
Abolins, M.
Abramowicz, H.
Zutshi, V.
DOI
10.1016/j.physletb.2010.03.064
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
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