The degenerate top squark next-to-lightest supersymmetric particle (NLSP) and neutralino (LSP) scenario is well motivated but hard to detect in the collider experiments. We propose a novel signature for detection of this scenario at the Large Hadron Collider and demonstrate its feasibility. In the constrained minimal supersymmetric standard model and top squark NLSP, gluinos are in general much heavier than the lighter top squark and, thus, it decays dominantly to high transverse momentum ($p_T$) top-quark–top-squark pairs. We consider gluino pair production and study two high-$p_T$ top jets and missing energy as the signature of this scenario.

• Received 10 August 2012

DOI:https://doi.org/10.1103/PhysRevLett.110.141801