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

  • A. Abulencia
  • , J. Adelman
  • , T. Affolder
  • , T. Akimoto
  • , M. G. Albrow
  • , D. Ambrose
  • , S. Amerio
  • , D. Amidei
  • , A. Anastassov
  • , K. Anikeev
  • , A. Annovi
  • , J. Antos
  • , M. Aoki
  • , G. Apollinari
  • , J. F. Arguin
  • , T. Arisawa
  • , A. Artikov
  • , W. Ashmanskas
  • , A. Attal
  • , F. Azfar
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Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

We 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.

Original languageEnglish
Article number131804
JournalPhysical Review Letters
Volume98
Issue number13
DOIs
StatePublished - Mar 30 2007

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