Electroweak superpartners scrutinized at the LHC in events with multi-leptons

Understand

We analyze a multi-lepton signal plus missing transverse energy from neutrinos expected at the LHC for a Bino-like neutralino as the lightest supersymmetric particle (LSP), when the left sneutrino is the next-to-LSP and hence a suitable source of Binos.

• The discussion is carried out in the framework of the $\mu \nu$SSM, where the presence of $R$-parity violating (RPV) couplings involving right-handed neutrinos solves the $\mu$ problem and can reproduce simultaneously the neutrino data.
• Left sneutrinos/sleptons are pair produced at $pp$ collisions decaying to Binos, with the latter decaying via RPV to $W\ell$ or $Z\nu$.
• This signal can be compared with LHC searches for electroweak superpartners through chargino-neutralino production.