AliAnalysisTaskEmcalJetSubstructureTree.h

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#ifndef ALIANALYSISTASKEMCALJETSUBSTRUCTURETREE_H
#define ALIANALYSISTASKEMCALJETSUBSTRUCTURETREE_H

#include "AliAnalysisTaskEmcalJet.h"
#include <exception>
#include <TString.h>
#include <fastjet/PseudoJet.hh>
#include <fastjet/JetDefinition.hh>

class TTree;
class AliClusterContainer;
class AliEmcalJet;
class AliParticleContainer;
class AliTrackContainer;

namespace EmcalTriggerJets {

struct AliNSubjettinessParameters {
  Double_t fOneSubjettiness;      
  Double_t fTwoSubjettiness;      
};

struct AliNSubjettinessDefinition{
  Double_t fBeta;                 
  Double_t fRadius;               
};

struct AliSoftDropParameters {
  Double_t fZg;             
  Double_t fMg;             
  Double_t fRg;             
  Double_t fPtg;            
  Int_t fNDropped;          
};

struct AliSoftdropDefinition {
  Double_t fZ;                              
  Double_t fBeta;                           
  fastjet::JetAlgorithm fRecluserAlgo;      
};

struct AliJetSubstructureSettings {
  AliSoftdropDefinition fSoftdropSettings;
  AliNSubjettinessDefinition fSubjettinessSettings;
};

struct AliJetSubstructureData {
  AliSoftDropParameters fSoftDrop;
  AliNSubjettinessParameters fNsubjettiness;
};

class AliAnalysisTaskEmcalJetSubstructureTree : public AliAnalysisTaskEmcalJet {
public:
  class ReclusterizerException : public std::exception {
  public:
    ReclusterizerException() : std::exception() {}
    virtual ~ReclusterizerException() throw() {}

    const char *what() const throw() { return "Error in reclusterizing in fastjet"; }
  };
  enum Reclusterizer_t {
    kCAAlgo = 0,
    kKTAlgo = 1,
    kAKTAlgo = 2
  };
  enum JetTreeEntry {
    kTRadius = 0,
    kTWeight = 1,
    kTPtJetRec = 2,
    kTPtJetSim = 3,
    kTAreaRec = 4,
    kTAreaSim = 5,
    kTNEFRec = 6,
    kTNEFSim = 7,
    kTMassRec = 8,
    kTMassSim = 9,
    kTZgMeasured = 10,
    kTZgTrue = 11,
    kTRgMeasured = 12,
    kTRgTrue = 13,
    kTMgMeasured = 14,
    kTMgTrue = 15,
    kTPtgMeasured = 16,
    kTPtgTrue = 17,
    kTOneNSubjettinessMeasured = 18,
    kTOneNSubjettinessTrue = 19,
    kTTwoNSubjettinessMeasured = 20,
    kTTwoNSubjettinessTrue = 21,
    kTNCharged = 22,
    kTNNeutral = 23,
    kTNConstTrue = 24,
    kTNDroppedMeasured = 25,
    kTNDroppedTrue = 26,
    kTNVar = 27
  };
  AliAnalysisTaskEmcalJetSubstructureTree();
  AliAnalysisTaskEmcalJetSubstructureTree(const char *name);
  virtual ~AliAnalysisTaskEmcalJetSubstructureTree();

  void SetTriggerBits(UInt_t triggersel) { fTriggerSelectionBits = triggersel; }
  void SetTriggerString(TString triggerstring) { fTriggerSelectionString = triggerstring; }

  void SetSoftdropDefiniion(Double_t zcut, Double_t betacut, Reclusterizer_t reclusterizer) {
    fSDZCut = zcut;
    fSDBetaCut = betacut;
    fReclusterizer = reclusterizer;
  }

  static AliAnalysisTaskEmcalJetSubstructureTree *AddEmcalJetSubstructureTreeMaker(Bool_t isMC, Bool_t isData, Double_t jetradius, const char *name);

protected:
  virtual void UserCreateOutputObjects();
  virtual bool Run();

  AliJetSubstructureData MakeJetSubstructure(const AliEmcalJet &jet, double jetradius, const AliParticleContainer *tracks, const AliClusterContainer *clusters, const AliJetSubstructureSettings &settings) const;

  AliSoftDropParameters MakeSoftDropParameters(const fastjet::PseudoJet &jet, const AliSoftdropDefinition &cut) const;

  AliNSubjettinessParameters MakeNsubjettinessParameters(const fastjet::PseudoJet &jet, const AliNSubjettinessDefinition &cut) const;

  void FillTree(double r, double weight, const AliEmcalJet *datajet, const AliEmcalJet *mcjet, AliSoftDropParameters *dataSoftdrop, AliSoftDropParameters *mcsoftdrop, AliNSubjettinessParameters *dataSubjettiness, AliNSubjettinessParameters *mcSubjettiness);

private:
  TTree                       *fJetSubstructureTree;        
  Double_t                     fJetTreeData[kTNVar];        

  Double_t                     fSDZCut;                     
  Double_t                     fSDBetaCut;                  
  Reclusterizer_t              fReclusterizer;              

  UInt_t                       fTriggerSelectionBits;       
  TString                      fTriggerSelectionString;     


  ClassDef(AliAnalysisTaskEmcalJetSubstructureTree, 1);
};

} /* namespace EmcalTriggerJets */

#endif /* ALIANALYSISTASKEMCALJETSUBSTRUCTURETREE_H */