Jet substructure by accident

Timothy Cohen, Eder Izaguirre, Mariangela Lisanti, Hou Keong Lou

Research output: Contribution to journalArticlepeer-review

26 Scopus citations


We propose a new search strategy for high-multiplicity hadronic final states. When new particles are produced at threshold, the distribution of their decay products is approximately isotropic. If there are many partons in the final state, it is likely that several will be clustered into the same large-radius jet. The resulting jet exhibits substructure, even though the parent states are not boosted. This "accidental" substructure is a powerful discriminant against background because it is more pronounced for high-multiplicity signals than for QCD multijets. We demonstrate how to take advantage of accidental substructure to reduce backgrounds without relying on the presence of missing energy. As an example, we present the expected limits for several R-parity violating gluino decay topologies. This approach allows for the determination of QCD backgrounds using data-driven methods, which is crucial for the feasibility of any search that targets signatures with many jets and suppressed missing energy.

Original languageEnglish (US)
Article number161
JournalJournal of High Energy Physics
Issue number3
StatePublished - Mar 2013

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


  • Jets
  • Supersymmetry Phenomenology


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