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Search for first generation scalar leptoquarks in pp collisions at root s=7 TeV with the ATLAS detector

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Search for first generation scalar leptoquarks in pp collisions at root s=7 TeV with the ATLAS detector

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

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

Este documento está disponible también en : 10.1016/j.physletb.2012.02.004

We report a search for first generation scalar leptoquarks using 1.03 fb(-1) of proton-proton collisions data produced by the Large Hadron Collider at root s = 7 TeV and recorded by the ATLAS experiment. Leptoquarks are sought via their decay into an electron or neutrino and a quark, producing events with two oppositely charged electrons and at least two jets, or events with an electron, missing transverse momentum and at least two jets. Control data samples are used to validate background predictions from Monte Carlo simulation. In the signal region, the observed event yields are consistent with the background expectations. We exclude at 95% confidence level the production of first generation scalar leptoquark with masses m(LQ) < 660 (607) GeV when assuming the branching fraction of a leptoquark to a charged lepton is equal to 1.0 (0.5).

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