TY  - JOUR
AU  - ATLAS Collaboration (Aad, G. et al
AU  - Amoros, G.
AU  - Cabrera Urban, S.
AU  - Castillo Gimenez, V.
AU  - Costa, M. J.
AU  - Escobar, C.
AU  - Ferrer, A.
AU  - Fuster, J.
AU  - Garcia, C.
AU  - Gonzalez de la Hoz, S.
AU  - Hernandez Jimenez, Y.
AU  - Higon-Rodriguez, E.
AU  - Irles Quiles, A.
AU  - Kaci, M.
AU  - Lacasta, C.
AU  - Lacuesta, V. R.
AU  - Marti-Garcia, S.
AU  - Miñano, M.
AU  - Mitsou, V. A.
AU  - Moles-Valls, R.
AU  - Moreno Llacer, M.
AU  - Oliver Garcia, E.
AU  - Perez Garcia-Estañ, M. T.
AU  - Ros, E.
AU  - Salt, J.
AU  - Sanchis-Lozano, M. A.
AU  - Solans, C. A.
AU  - Sanchez, J.
AU  - Torro Pastor, E.
AU  - Valladolid Gallego, E.
AU  - Valls Ferrer, J. A.
AU  - Villaplana Perez, M.
AU  - Vos, M.
AU  - Wildauer, A.
PY  - 2010
DA  - 2010//
TI  - Charged-particle multiplicities in pp interactions at root s=900 GeV measured with the ATLAS detector at the LHC
T2  - Phys. Lett. B
JO  - Physics Letters B
SP  - 21
EP  - 42
VL  - 688
IS  - 1
PB  - Elsevier Science Bv
KW  - Charged-particle
KW  - Multiplicities
KW  - 900 GeV
KW  - ATLAS
KW  - LHC
KW  - Minimum bias
AB  - 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.
SN  - 0370-2693
UR  - http://arxiv.org/abs/1003.3124
UR  - https://doi.org/10.1016/j.physletb.2010.03.064
DO  - 10.1016/j.physletb.2010.03.064
LA  - English
N1  - ISI:000286150500001
ID  - ATLASCollaborationAad_etal2010
ER  -