Speaker
Todd Adams
(Department of Physics, B-159 - Florida State University)
Description
Supersymmetry predicts the existence of charginos and neutralinos, the
partners of the gauge and Higgs bosons, which can be produced in pairs at
the Tevatron. Charginos and neutralinos decay directly or in cascades into
charged leptons and the lightest supersymmetric particle (LSP). Assuming
R parity conservation the LSP (in this case the lightest neutralino) is stable.
Due to the small background from Standard Model processes, a final state
with three leptons and missing transverse energy is considered an
excellent channel at the Tevatron. In this presentation results from four
different channels (e+e+l, mu+mu+l, e+mu+l and mu+tau+l) will be presented.
The results of the individual analyses, based on a data set corresponding
to an integrated luminosity of 2.3 fb-1, are combined and interpreted in
the context of the mSUGRA model. The final exclusion limit in the m0-m1/2
plane, extending well beyond existing limits, will be presented.
For some sets of parameters in the mSUGRA parameter space, the third
lepton may be very soft and a like sign leptons signature has been developed
to deal with such a topology.
Authors
Aurelio Juste
(Fermilab)
Horst Wahl
(Florida State University)
Stefan Soldner-Rembold
(University of Manchester)
