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Search for Anomalous Production of Multilepton Events in pp̅ Collisions at √s=1.96  TeV

AuthorsCuevas, Javier ; Gómez, G. ; Gómez-Ceballos, Guillelmo; Menzemer, Stephanie; Palencia, Enrique ; Rodrigo, Teresa ; Scodellaro, Luca ; Vila, Iván ; Vilar, Rocío ; CDF Collaboration
Issue Date2007
PublisherAmerican Physical Society
CitationPhysical Review Letters 98(13): 131804 (2007)
AbstractWe report a search for the anomalous production of events with multiple charged leptons in pp̄ collisions at s=1.96TeV using a data sample corresponding to an integrated luminosity of 346pb-1 collected by the CDFII 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 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 (χ 10) and chargino (χ1±) particles. For one particular choice of model parameters, the limits are M(χ10)>110GeV/c2 and M(χ1±)>203GeV/c2 at 95% confidence level; the variation of these mass limits with model parameters is presented. © 2007 The American Physical Society.
Identifiersdoi: 10.1103/PhysRevLett.98.131804
issn: 0031-9007
e-issn: 1079-7114
Appears in Collections:(IFCA) Artículos
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