A search for prompt lepton-jets in pp collisions at root s=7 TeV with the ATLAS detector
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A search for prompt lepton-jets in pp collisions at root s=7 TeV with the ATLAS detector

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A search for prompt lepton-jets in pp collisions at root s=7 TeV with the ATLAS detector

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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; March Ruiz, Luis; 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/10550/37932
We present a search for a light (mass < 2 GeV) boson predicted by Hidden Valley supersymmetric models that decays into a final state consisting of collimated muons or electrons, denoted 'lepton-jets'. The analysis uses 5fb-1 of sqrt(s) = 7 TeV proton--proton collision data recorded by the ATLAS detector at the Large Hadron Collider to search for the following signatures: single lepton-jets with at least four muons; pairs of lepton-jets, each with two or more muons; and pairs of lepton-jets with two or more electrons. This study finds no statistically significant deviation from the Standard Model prediction and places 95% confidence-level exclusion limits on the production cross section times branching ratio of light bosons for several parameter sets of a Hidden Valley model.

    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 March, L. 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 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 A search for prompt lepton-jets in pp collisions at root s=7 TeV with the ATLAS detector Physics Letters B 719 4-5 299 317
http://dx.doi.org/10.1016/j.physletb.2013.01.034

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