Search for High - Mass Resonances Decaying into Leptons of Different

where the indices i, j and k denote the generations. The fields in Eq. 2 are superfields [1]. The 48 RPV couplings in Eq. 2 are constrained from theoretical and phenomenological points of view ([2], [3]). The DØ Collaboration searched for heavy sneutrino decaying into eμ in 1.0 fb of data [4]. The previous search for high-mass resonances decaying into eμ channel by the CDF Collaboration used 344 pb[5]. In SUSY models, with an extra U(1), lepton flavor violation (LFV) interactions are allowed by the Lagrangian density: g′ z sin θW [ψ̄iQ ψ ijγ ψj]Xμ, where i, j are generation indices, g ′ Z is the U(1) ′ gauge coupling, sin θW is electroweak mixing angle and Qψij is referred to as the “charges” [6]. The lepton charges Q l ij are constrained by low energy experiments [7]. CDF Run II performed a search for pp̄ → Z ′ → eμ and excluded a portion of the Q12 vs.MZ′ plane [5].