6533b85cfe1ef96bd12bd148

RESEARCH PRODUCT

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

Atlas CollaborationSusana Cabrera UrbánMaría Victoria Castillo GiménezMaría José Costa MezquitaFarida FassiAntonio Ferrer SoriaLuca FioriniJuan A. Fuster VerdúCarmen García GarcíaJosé Enrique García NavarroSantiago González De La HozYesenia Hernández JiménezEmilio Higón RodríguezAdrián Irles QuilesMohammed KaciCarlos Lacasta LlácerVicente Lacuesta MiquelLuis March RuizSalvador Martí GarcíaMercedes Miñano MoyaVasiliki MitsouRegina Moles VallsMaría Moreno LlácerElena Oliver GarcíaSebastián Pedraza LópezMaría Teresa Pérez García-estañE. Romero AdamEduardo Ros MartínezJosé Salt CairolsVictoria Sánchez MartínezCarlos Antonio Solans SánchezU. SoldevilaJavier Sánchez MartínezEmma Torró PastorAlberto Valero BiotE. Valladolid GallegoJuan Antonio Valls FerrerMiguel Villaplana PérezMarcel Vos

subject

Astrophysics::High Energy Astrophysical PhenomenaHigh Energy Physics::PhenomenologyPhysics::Accelerator PhysicsHigh Energy Physics::ExperimentFísica nuclear

description

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.

yearjournalcountryeditionlanguage
2013-01-01
http://hdl.handle.net/10550/37932