Many Leptons at the LHC from the NMSSM

We present a benchmark in the parameter space of the Next-to-Minimal Supersymmetric Standard Model (NMSSM) that provides for a dramatic multi-lepton signal and no jets containing 5 or more leptons resulting from the cascade decays of the third lightest neutralino, $χ^{0}_{3}$, and the lightest chargino, $χ^{\pm}_{1}$, via light charged sleptons. This is a very clean signal with almost no Standard Model (SM) background. In some cases, a total signal of $\ge 3$leptons + 0 jets can be detected at the $5 σ$ level at the LHC running at $\sqrt{s}=7$ TeV with approximately 3 fb$^{-1}$ of data and with less than 1 fb$^{-1}$ when running at $\sqrt{s}=14$ TeV. In addition, kinematic edges in the invariant mass distributions of 2, 3, and 4 leptons are easily detectable with large integrated luminosities ($\sim 600$ fb$^{-1}$) which can lead to simple measurements of the mass differences of heavy particles in the decay chains, including all combinations of the three lightest neutralinos.

No reviews yet.

No comments yet.