Introduction

When Consider a Jet one must consider

• Type of input particle
  • PFJets - clustered from particle flow candidates
    • These can be further classified based on different pileup reduction techniques:
      • PFCHS jets - Charge Hadron Subtracted (CHS) - charged particles from non-primary vertices (pileup) are removed before clustering.
      • PUPPI jets - jets using inputs from the PUPPI algorithm
  • JPTJets - Jets plus track
  • CaloJets - clustered from calorimeter towers
• Jet algorithm used to cluster
  • Anti-kt (AK)
  • Cambridge Aachen (CA)
  • kt
• Jet size
  • Example: AK4 implies a jet clustered with the anti-kT algorithm with distance parameter R=0.4