Many Leptons at the LHC from the NMSSM

Details Many Leptons at the LHC from the NMSSM Many Leptons at the LHC from the NMSSM

2010-11-15

arxiv.org/abs/1011.3526v2

Phys.Rev.D83:055006,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

23 pages, 3 figures, 8 tables

Scientific paper

10.1103/PhysRevD.83.055006

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, $\chi^{0}_{3}$, and the lightest chargino, $\chi^{\pm}_{1}$, 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 $5 \sigma$ 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.

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