Understand
An unconstrained minimal supersymmetric standard model with the superpartners of the strongly interacting particles very heavy (close to the kinematic reach of the LHC or even beyond it) and a relatively light electroweak sector is considered.
- Using the event generator Pythia it is shown that the 1$\tau$-jet (tagged) + 2$l$ and 2$\tau$-jets (tagged) + 1$l$ signals with a reasonably hard $\etslash$ spectrum either by themselves or in combination with the conventional $3l$ signal, which is known to be of rather modest size with a soft $\etslash$ spectrum, may appreciably extend the reach of chargino-neutralino search at the LHC with 10 fb$^{-1}$ of integrated luminosity.
- This is especially so if the lighter chargino and the second lightest neutralino decays via two body leptonic modes with large BRs.
- The theoretical motivation of this scenario, yielding large values of the fine-tuning parameters but consistent with various indirect constraints including the dark matter relic density, is briefly discussed.