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kinematicsJets.md

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KinematicsJets

Jet methods were originally declared in the Kinematics class. KinematicsJets will inherit from the Kinematics class to avoid redeclaration of methods.

Methods

Constructor

KinematicsJets(Double_t enEleBeam_, Double_t enIonBeam_, Double_t crossAng_);

  • requires beam energies and crossing angle, set by Analysis (at the macro level)

  • calls the Kinematics base class constructor - see documentation there.

Calculators

Calculate Jet Kinematics

void CalculateJetKinematics(fastjet::PseudoJet jet);
void CalculateBreitJetKinematics(fastjet::PseudoJet jet);
  • requires Jets (from GetJets or GetBreitFrameJets)
  • calculates:
    • qTjet
    • pTjet
    • zjet
    • jperp
    • ...

Find Truth Jets Matching Reco Jets

void CalculateJetResolution(fastjet::PseudoJet jet);
  • requires that GetJets and CalculateJetKinematics has run
  • for the input reconstructed jet, find the closest truth level jet
  • pass the kinematics of the matched truth level jet

Variables

Most of these variables are public to allow for easy access

  • many calculator methods will modify / determine them; because of this, you need to understand which calculations calculate what, and what variables each calculation depends on
  • be careful not to 'accidentally' modify them!
// jet objects
int jetAlgo;
double jetRad, jetMinPt; 

std::vector<fastjet::PseudoJet> jetsRec, jetsTrue;
std::vector<fastjet::PseudoJet> breitJetsRec, breitJetsTrue;
std::map<double, int> jetConstituents;
fastjet::ClusterSequence csRec;
fastjet::ClusterSequence csTrue;

// jet variables
Double_t zjet, pTjet, qTjet, mTjet, etajet, phijet, mjet, ejet;
Double_t deltaRjet;
int matchStatusjet;
Double_t pTmtjet, mTmtjet, etamtjet, phimtjet, mmtjet, emtjet;
std::vector<double> jperp;
std::vector<double> zhad_jet;
Double_t quarkpT; // struck quark information