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. 2007 Mar 30;98(13):131804.
doi: 10.1103/PhysRevLett.98.131804. Epub 2007 Mar 30.

Search for anomalous production of multilepton events in pp collisions at sqrt s=1.96 TeV

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TollefsonT TomuraD TonelliS TorreD TorrettaS TourneurW TrischukR TsuchiyaS TsunoN TuriniF UkegawaT UnverhauS UozumiD UsyninS VallecorsaN van RemortelA VarganovE VatagaF VázquezG VelevG VeramendiV VeszpremiR VidalI VilaR VilarT VineI VollrathI VolobouevG VolpiF WürthweinP WagnerR G WagnerR L WagnerJ WagnerW WagnerR WallnyS M WangA WarburtonS WaschkeD WatersM WeinbergerW C Wester IiiB WhitehouseD WhitesonA B WicklundE WicklundG WilliamsH H WilliamsP WilsonB L WinerP WittichS WolbersC WolfeT WrightX WuS M WynneA YagilK YamamotoJ YamaokaT YamashitaC YangU K YangY C YangW M YaoG P YehJ YohK YoritaT YoshidaG B YuI YuS S YuJ C YunL ZanelloA ZanettiI ZawX ZhangJ ZhouS ZucchelliCDF Collaboration
Affiliations

Search for anomalous production of multilepton events in pp collisions at sqrt s=1.96 TeV

A Abulencia et al. Phys Rev Lett. .

Abstract

We report a search for the anomalous production of events with multiple charged leptons in pp[over] collisions at sqrt[s]=1.96 TeV using a data sample corresponding to an integrated luminosity of 346 pb(-1) collected by the CDF II detector at the Fermilab Tevatron. The search is divided into three-lepton and four-or-more-lepton data samples. We observe six events in the three-lepton sample and zero events in the > or =4-lepton sample. Both numbers of events are consistent with standard model background expectations. Within the framework of an R-parity-violating supergravity model, the results are interpreted as mass limits on the lightest neutralino (chi[over](1)(0)) and chargino (chi[over](1+/-) particles. For one particular choice of model parameters, the limits are M(chi[over](1)(0)>110 GeV/c2 and M(chi[over](1+/-)>203 GeV/c2 at 95% confidence level; the variation of these mass limits with model parameters is presented.

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