%0 Journal Article
%T Charged-particle multiplicities in pp interactions at root s=900 GeV measured with the ATLAS detector at the LHC
%A ATLAS Collaboration (Aad, G. et al
%A Amoros, G.
%A Cabrera Urban, S.
%A Castillo Gimenez, V.
%A Costa, M. J.
%A Escobar, C.
%A Ferrer, A.
%A Fuster, J.
%A Garcia, C.
%A Gonzalez de la Hoz, S.
%A Hernandez Jimenez, Y.
%A Higon-Rodriguez, E.
%A Irles Quiles, A.
%A Kaci, M.
%A Lacasta, C.
%A Lacuesta, V. R.
%A Marti-Garcia, S.
%A Miñano, M.
%A Mitsou, V. A.
%A Moles-Valls, R.
%A Moreno Llacer, M.
%A Oliver Garcia, E.
%A Perez Garcia-Estañ, M. T.
%A Ros, E.
%A Salt, J.
%A Sanchis-Lozano, M. A.
%A Solans, C. A.
%A Sanchez, J.
%A Torro Pastor, E.
%A Valladolid Gallego, E.
%A Valls Ferrer, J. A.
%A Villaplana Perez, M.
%A Vos, M.
%A Wildauer, A.
%J Physics Letters B
%D 2010
%V 688
%N 1
%I Elsevier Science Bv
%@ 0370-2693
%G English
%F ATLASCollaborationAad_etal2010
%O ISI:000286150500001
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=515), last updated on Thu, 15 Dec 2011 13:23:57 +0000
%X 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 vertical bar eta vertical bar < 2.5 and p(T) > 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 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.
%K Charged-particle
%K Multiplicities
%K 900 GeV
%K ATLAS
%K LHC
%K Minimum bias
%R 10.1016/j.physletb.2010.03.064
%U http://arxiv.org/abs/1003.3124
%U https://doi.org/10.1016/j.physletb.2010.03.064
%P 21-42