BTagging

determines origin of jet, applies b-tagging efficiency (miss identification rate) formulas and sets b-tagging flags

• input:
  • PartonInputArray
  • JetInputArray

• output:
  • OutputArray

• parameters:
  • DeltaR
  • PartonPTMin
  • PartonEtaMax
  • EfficiencyFormula - efficiency (miss identification rate) specified for a PDG code as a function of transverse momentum and pseudo-rapidity
  • BitNumber (default 0)

Starting from version 3.0.7 it is possible to test several (up to 32) b-tagging working points for every jet. The BTag variable in the Jet class can store up to 32 bits. If the user specifies BitNumber = 0 in the BTagging module, that particular bit will be stored in the first position. If BitNumber = 1, it will be in the second position, etc ...

In order to check whether a jet has passed the b-tagging criterium defined by the BitNumber = i, just do:

Calorimeter

fills calorimeter towers, performs calorimeter resolution smearing, preselects towers hit by photons and performs an energy flow algorithm

• input:
  • ParticleInputArray
  • TrackInputArray

• output:
  • TowerOutputArray
  • PhotonOutputArray
  • EFlowTrackOutputArray
  • EFlowTowerOutputArray

• parameters:
  • EtaPhiBins
  • EnergyFraction
  • ECalResolutionFormula - energy resolution as a function of energy and pseudo-rapidity
  • HCalResolutionFormula - energy resolution as a function of energy and pseudo-rapidity

Efficiency

selects candidates from the InputArray according to the efficiency formula

• input:
  • InputArray

• output:
  • OutputArray

• parameters:
  • EfficiencyFormula - efficiency specified as a function of transverse momentum and pseudo-rapidity

EnergySmearing

performs energy resolution smearing

• input:
  • InputArray

• output:
  • OutputArray

• parameters:
  • ResolutionFormula - energy resolution specified as a function of transverse momentum and pseudo-rapidity

FastJetFinder

finds jets using ​FastJet library, for more information about parameters see chapters 4 and 5 of the ​FasJet user manual

• input:
  • InputArray

• output:
  • OutputArray

• parameters:
  • JetAlgorithm - 1 CDFJetClu, 2 MidPoint, 3 SIScone, 4 kt, 5 Cambridge/Aachen, 6 antikt
  • ParameterR
  • ConeRadius
  • SeedThreshold
  • ConeAreaFraction
  • AdjacencyCut
  • OverlapThreshold
  • MaxIterations
  • MaxPairSize
  • Iratch
  • JetPTMin

Isolation

sums transverse momenta of isolation objects (tracks, calorimeter towers, etc) within a DeltaRMax cone around a candidate, calculates fraction of this sum to the candidate's transverse momentum and outputs candidates that have the transverse momenta fraction less than PTRatioMax.

• input:
  • CandidateInputArray
  • IsolationInputArray

• output:
  • OutputArray

• parameters:
  • DeltaRMax
  • PTMin
  • PTRatioMax

Merger

merges multiple input arrays into one output array, sums transverse momenta and transverse energies of all input objects

• input:
  • InputArray - list of input arrays and corresponding selection criteria as functions of transverse momentum and pseudo-rapidity

• output:
  • OutputArray
  • MomentumOutputArray
  • EnergyOutputArray

MomentumSmearing

performs transverse momentum resolution smearing

• input:
  • InputArray

• output:
  • OutputArray

• parameters:
  • ResolutionFormula - transverse momentum resolution specified as a function of transverse momentum and pseudo-rapidity

ParticlePropagator

propagates charged and neutral particles from a given vertex to a cylinder defined by its radius, its half-length, centered at (0,0,0) and with its axis oriented along the z-axis

• input:
  • InputArray

• output:
  • OutputArray
  • ChargedHadronOutputArray
  • ElectronOutputArray
  • MuonOutputArray

• parameters:
  • Radius
  • HalfLength
  • Bz

TauTagging

determines origin of jet, applies tau-tagging efficiency (miss identification rate) formulas and sets tau-tagging flags

• input:
  • ParticleInputArray
  • PartonInputArray
  • JetInputArray

• output:
  • OutputArray

• parameters:
  • DeltaR
  • TauPTMin
  • TauEtaMax
  • EfficiencyFormula - efficiency (miss identification rate) specified for a PDG code as a function of transverse momentum and pseudo-rapidity

TreeWriter

fills ROOT tree branches

• parameters:
  • Branch - list of input arrays, corresponding ROOT tree branches and ROOT classes

UniqueObjectFinder

finds uniquely identified photons, electrons, taus and jets

• parameters:
  • InputArray - list of input and output arrays there earlier arrays take precedence over later ones