Probing light bino and higgsinos at the LHC

Motivated by the naturalness, we study a simplified Minimal Supersymmetric Standard Model (MSSM) scenario where only the bino-like lightest supersymmetric particle (LSP) and higgsino-like next-lightest supersymmetric particle (NLSP) are light. We first scan the parameter space of this scenario, considering the constraints from the Higgs mass, flavor physics, electroweak precision measurements and dark matter experiments. Then in the allowed parameter space, we perform a Monte Carlo simulation for the [Formula: see text] production followed by [Formula: see text] and [Formula: see text]. By examining the presently available trilepton bounds on the wino-like chargino/neutralino, we find that only a narrow region [Formula: see text] and [Formula: see text] on the plane of [Formula: see text] can be excluded. Finally, we explore the potential of trilepton signature in probing such a scenario at 14 TeV Large Hadron Collider (LHC) and find that the region with [Formula: see text] and [Formula: see text] can be covered at [Formula: see text] level with luminosity [Formula: see text].