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K(s)(0) and Lambda production in pp interactions at root s=0.9 and 7 TeV measured with the ATLAS detector at the LHC

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K(s)(0) and Lambda production in pp interactions at root s=0.9 and 7 TeV measured with the ATLAS detector at the LHC

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ATLAS Collaboration; Mitsou, Vasiliki; Fiorini, Luca; Ros Martínez, Eduardo; Castillo Giménez, María Victoria; Fuster Verdú, Juan A.; García García, Carmen; Cabrera Urbán, Susana; Martí García, Salvador; Salt Cairols, José; Lacasta Llácer, Carlos; Valls Ferrer, Juan Antonio; Higón Rodríguez, Emilio; Ferrer Soria, Antonio; González de la Hoz, Santiago; Kaci, Mohammed; Hernández Jiménez, Yesenia; Villaplana Pérez, Miguel

Aquest document és un/a article, creat/da en: 2012

Este documento está disponible también en : 10.1103/PhysRevD.85.012001

The production of K(S)(0) and Lambda hadrons is studied in pp collision data at root s = 0.9 and 7 TeV collected with the ATLAS detector at the LHC using a minimum-bias trigger. The observed distributions of transverse momentum, rapidity, and multiplicity are corrected to hadron level in a model-independent way within well-defined phase-space regions. The distribution of the production ratio of (Lambda) over bar to Lambda baryons is also measured. The results are compared with various Monte Carlo simulation models. Although most of these models agree with data to within 15% in the K(S)(0) distributions, substantial disagreements are found in the Lambda distributions of transverse momentum.

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