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

CollaborationWith : Campanelli, Mario / Clark, Allan Geoffrey / Donega, Mauro / Moed, Shulamit / Sfyrla, Anna / Vallecorsa, Sofia / Wu, Xin
Published in Physical review letters. 2007, vol. 98, no. 13, 131804
Abstract We report a search for the anomalous production of events with multiple charged leptons in pp collisions at 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 ≥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˜01) and chargino (χ˜±1) particles. For one particular choice of model parameters, the limits are M(χ˜01)>110  GeV/c2 and M(χ˜±1)>203  GeV/c2 at 95% confidence level; the variation of these mass limits with model parameters is presented.
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CDF COLLABORATION. Search for Anomalous Production of Multilepton Events in pp Collisions at s√=1.96  TeV. In: Physical review letters, 2007, vol. 98, n° 13, p. 131804. doi: 10.1103/PhysRevLett.98.131804 https://archive-ouverte.unige.ch/unige:38376

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Deposited on : 2014-07-01

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