Search for R-parity violating supersymmetry via the LLE¯ couplings λ121, λ122 or λ133 in pp¯ collisions at s=1.96 TeV

Abstract A search for gaugino pair production with a trilepton signature in the framework of R -parity violating supersymmetry via the couplings λ 121 , λ 122 , or λ 133 is presented. The data, corresponding to an integrated luminosity of L ≈ 360  pb −1 , were collected from April 2002 to August 2004 with the D∅ detector at the Fermilab Tevatron Collider, at a center-of-mass energy of s = 1.96  TeV . This analysis considers final states with three charged leptons with the flavor combinations eel , μμl , and eeτ ( l = e or μ ). No evidence for supersymmetry is found and limits at the 95% confidence level are set on the gaugino pair production cross section and lower bounds on the masses of the lightest neutralino and chargino are derived in two supersymmetric models.