Title
Search for anomalous production of multilepton events in <tex>$p\overline{p}$</tex> collisions at <tex>$\sqrt{s}$</tex>=1.96 TeV
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
New York, N.Y. ,
Subject
Physics
Source (journal)
Physical review letters. - New York, N.Y.
Volume/pages
98(2007) :13 , p. 131804,1-131804,7
ISSN
0031-9007
ISI
000245331500022
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
We report a search for the anomalous production of events with multiple charged leptons in pp&#773; 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 (χ10) and chargino (χ1±) particles. For one particular choice of model parameters, the limits are M(χ10)>110  GeV/c2 and M(χ1±)>203   GeV/c2 at 95% confidence level; the variation of these mass limits with model parameters is presented.
Full text (open access)
https://repository.uantwerpen.be/docman/irua/247d89/9bee0ca7.pdf
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