ATLAS Z + MET Excess in the MSSM
The ATLAS collaboration recently found a 3 sigma excess in the search for events with large missing transverse energy, jets, and a dilepton peaked on the Z mass region. We study this excess in the minimal supersymmetric standard model (MSSM), especially focusing on the well-motivated split supersymmetry (SUSY) spectrum. We consider the following decay chain: gluino to gluon and Higgsino which subsequently decays to Bino and Z. The first branching ratio is enhanced by the heavy squark loop, and the second branching ratio is enhanced by the quasi-degenerate mass spectrum. The decay topology and the mass spectrum is helpful to circumvent constraints from other SUSY searches. This talk is based on arXiv:1506.07161.