Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/27707
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Título : Charged-particle multiplicities in pp interactions at root s=900 GeV measured with the ATLAS detector at the LHC
Autor : Aad, G., Amorós, Gabriel, Cabrera, Susana, Castillo, Mª Victoria, Costa, María José, Escobar, Carlos, Ferrer, Antonio, Fuster, Juan, García García, Carmen, González de la Hoz, Santiago, Hernández Jiménez, Yesenia, Higón, Emilio, Irles Quiles, Adrián, Kaci, Mohamed, Lacasta Llácer, Carlos, Lacuesta, Vicente, Martí García, Salvador, Miñano, Mercedes, Mitsou, Vasiliki A., Moles Valls, Regina, Moreno Llácer, María, Oliver García, Elena, Pérez García-Estañ, María Teresa, Ros, Eduardo, Salt, José, Sánchez Martínez, Javier, Sanchís Lozano, Miguel Ángel, Solans, Carlos, Torró Pastor, Emma, Valladolid Gallego, Eva, Valls Ferrer, Juan Antonio, Villaplana Pérez, Miguel, Vos, Marcel, Wildauer, Andreas, ATLAS Collaboration
Fecha de publicación : 26-Apr-2010
Editor: Elsevier
Citación : Physics Letters - Section B 688 (1): 21-42 (2010)
Resumen: 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.
Descripción : 22 páginas, 4 figuras, 1 tabla.-- et al.(ATLAS Collaboration).-- arXiv:1003.3124v2
Versión del editor: http://dx.doi.org/10.1016/j.physletb.2010.03.064
URI : http://hdl.handle.net/10261/27707
ISSN: 0370-2693
DOI: 10.1016/j.physletb.2010.03.064
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