Search for light top squark pair production in final states with leptons and b-jets with the ATLAS detector in sqrt(s) = 7 TeV proton-proton collisions
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Search for light top squark pair production in final states with leptons and b-jets with the ATLAS detector in sqrt(s) = 7 TeV proton-proton collisions

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Search for light top squark pair production in final states with leptons and b-jets with the ATLAS detector in sqrt(s) = 7 TeV proton-proton collisions

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ATLAS Collaboration; Cabrera Urbán, Susana Perfil; Castillo Giménez, María Victoria Perfil; Costa Mezquita, María José; Fassi, Farida; Ferrer Soria, Antonio Perfil; Fiorini, Luca; Fuster Verdú, Juan A. Perfil; García García, Carmen Perfil; García Navarro, José Enrique; González de la Hoz, Santiago Perfil; Hernández Jiménez, Yesenia; Higón Rodríguez, Emilio Perfil; Irles Quiles, Adrián; Kaci, Mohammed; Lacasta Llácer, Carlos; Lacuesta Miquel, Vicente; Martí García, Salvador; Miñano Moya, Mercedes; Mitsou, Vasiliki; Moles Valls, Regina; Moreno Llácer, María; Oliver García, Elena; Pedraza López, Sebastián; Pérez García-Estañ, María Teresa; Romero Adam, E.; Ros Martínez, Eduardo; Salt Cairols, José Perfil; Sánchez Martínez, Victoria; Solans Sánchez, Carlos Antonio; Soldevila, U.; Sánchez Martínez, Javier; Torró Pastor, Emma; Valero Biot, Alberto; Valladolid Gallego, E.; Valls Ferrer, Juan Antonio; Villaplana Pérez, Miguel; Vos, Marcel
This document is a artículoDate2013

Este documento está disponible también en : http://hdl.handle.net/10550/37929
The results of a search for pair production of light top squarks are presented, using 4.7 fb^-1 of sqrt(s) = 7 TeV proton-proton collisions collected with the ATLAS detector at the Large Hadron Collider. This search targets top squarks with masses similar to, or lighter than, the top quark mass. Final states containing exclusively one or two leptons (e, mu), large missing transverse momentum, light-jets and b-jets are used to reconstruct the top squark pair system. Global mass scale variables are used to separate the signal from a large ttbar background. No excess over the Standard Model expectations is found. The results are interpreted in the framework of the Minimal Supersymmetric Standard Model, assuming the top squark decays exclusively to a chargino and a b-quark. Light top squarks with masses between 123-167 GeV are excluded for neutralino masses around 55 GeV.

    ATLAS Collaboration Cabrera Urbán, Susana Castillo Giménez, María Victoria Costa Mezquita, María José Fassi, Farida Ferrer Soria, Antonio Fiorini, Luca Fuster Verdú, Juan A. García García, Carmen García Navarro, José Enrique González de la Hoz, Santiago Hernández Jiménez, Yesenia Higón Rodríguez, Emilio Irles Quiles, Adrián Kaci, Mohammed Lacasta Llácer, Carlos Lacuesta Miquel, Vicente Martí García, Salvador Miñano, M. Mitsou, Vasiliki Moles Valls, Regina Moreno Llácer, María Oliver García, Elena Pedraza López, Sebastián Pérez García-Estañ, María Teresa Romero Adam, E. Ros Martínez, Eduardo Salt Cairols, José Sánchez Martínez, V. Solans Sánchez, Carlos Antonio Soldevila, U. Sánchez, J. Torró Pastor, Emma Valero, A. Valladolid Gallego, E. Valls Ferrer, Juan Antonio Villaplana Pérez, Miguel Vos, Marcel 2013 Search for light top squark pair production in final states with leptons and b-jets with the ATLAS detector in sqrt(s) = 7 TeV proton-proton collisions Physics Letters B 720 1-3 13 31
http://dx.doi.org/10.1016/j.physletb.2013.01.049

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