Search for Anomalous Production of Multilepton Events in pp¯ Collisions at s=1.96TeV

A Abulencia et al. (CDF Collaboration)
Phys. Rev. Lett. 98, 131804 – Published 30 March 2007

Abstract

We report a search for the anomalous production of events with multiple charged leptons in pp¯ collisions at s=1.96TeV using a data sample corresponding to an integrated luminosity of 346pb1 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 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 (χ˜1±) particles. For one particular choice of model parameters, the limits are M(χ˜10)>110GeV/c2 and M(χ˜1±)>203GeV/c2 at 95% confidence level; the variation of these mass limits with model parameters is presented.

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  • Received 16 December 2006

DOI:https://doi.org/10.1103/PhysRevLett.98.131804

©2007 American Physical Society

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Vol. 98, Iss. 13 — 30 March 2007

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