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Search for dilepton resonances in pp collisions at √s = 7 TeV with the ATLAS detector

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Search for dilepton resonances in pp collisions at √s = 7 TeV with the ATLAS detector

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

Aquest document és un/a article, creat/da en: 2011

Este documento está disponible también en : 10.1103/PhysRevLett.107.272002

This Letter reports on a search for narrow high-mass resonances decaying into dilepton final states. The data were recorded by the ATLAS experiment in pp collisions at sqrt(s) = 7 TeV at the Large Hadron Collider and correspond to a total integrated luminosity of 1.08 (1.21) fb(-1) in the e(+)e(-) (mu(+)mu(-)) channel. No statistically significant excess above the standard model expectation is observed and upper limits are set at the 95% C. L. on the cross section times branching fraction of Z' resonances and Randall-Sundrum gravitons decaying into dileptons as a function of the resonance mass. A lower mass limit of 1.83 TeV on the sequential standard model Z' boson is set. A Randall-Sundrum graviton with coupling k/(M) over bar Pl = 0.1 is excluded at 95% C. L. for masses below 1.63 TeV.

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