Search for resonant \tau-sneutrino production in the e \tau final state with the CMS detector

Presented is a search for the lightest supersymmetric particle (LSP) in a R-parity vi- olating (RPV) SUSY scenario. The role of the LSP is considered to be played by the τ-sneutrino ν˜τ . This may be produced resonantly in proton-proton collisions via the coupling λ′311 in the process dd¯ → ν˜τ , followed by a decay in a narrow width to an eτ final state via the coupling λ313. The analysis covers reconstruction of the hadronic τ from decay products, data driven background scaling and event yield estimation. The search is performed on 1.3 fb−1 data from pp collisions collected 2012 with the CMS experiment at √s = 8 TeV. No excess above the background prediction is observed. A lower mass limit of (1.20 ± 0.15) TeV is determined, which is in accordance with the current limit of 1.2 TeV.