How to look for supersymmetry under the lamppost at the LHC

Abstract

We apply a model-independent, agnostic approach to the collider phenomenology of supersymmetry (SUSY), in which all mass parameters are taken as free inputs at the weak scale. We consider the gauginos, higgsinos, and the first two generations of sleptons and squarks, and analyze all possible mass hierarchies among them ($4\times 8!=161,280$ in total) in which the lightest superpartner is neutral, leading to missing energy. In each case, we identify the full set of the dominant (i.e. least suppressed by phase space, small mixing angles or Yukawa couplings) decay chains originating from the lightest colored superpartner. Our exhaustive search reveals several quite dramatic yet unexplored multilepton signatures with up to 8 isolated leptons (plus possibly up to 2 massive gauge or Higgs bosons) in the final state. Such events are spectacular, background-free for all practical purposes, and may lead to a discovery of SUSY in the very early stage ($\sim 10{\mathrm{pb}}^{-1}$) of LHC operations at 7 TeV.

4 pages, 4 figures

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• PYTHIA 6.4 Physics and Manual
• Search for Long-Lived Massive Charged Particles in 1.96 TeV $\bar{p}p}$ Collisions
• The Landscape of Sparticle Mass Hierarchies and Their Signature Space at the LHC
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Cited by in corpus (8)

• The Constrained Minimal Dirac Gaugino Supersymmetric Standard Model
• Low Mass Gluino within the Sparticle Landscape, Implications for Dark Matter, and Early Discovery Prospects at LHC-7
• Predictive Signatures of Supersymmetry: Measuring the Dark Matter Mass and Gluino Mass with Early LHC data
• General MSSM signatures at the LHC with and without R-parity
• Long-lived staus from strong production in a simplified model approach
• General NMSSM signatures at the LHC
• Many Leptons at the LHC from the NMSSM
• The Hierarchy Solution to the LHC Inverse Problem