Resonant sneutrino production in supersymmetry with R-parity violation at the LHC Original Research Article

The resonant production of sneutrinos at the LHC via the R-parity violating couplings λ′ijk×LiQjDck is studied through its three-leptons signature. A detailed particle level study of signal and background is performed using a fast simulation of the ATLAS detector. Through the full reconstruction of the cascade decay, a model-independent and precise measurement of the masses of the involved sparticles can be performed. Besides, this signature can be detected for a broad class of supersymmetric models, and for a wide range of values of several λ′ijk coupling constants. Within the MSSM, the production of a 850 GeV sneutrino for λ′211>0.05, and of a 300 GeV sneutrino for λ′211>0.01 can be observed within the first three years of LHC running.