source: git/classes/DelphesClasses.h@ c9e7466

/*
 *  Delphes: a framework for fast simulation of a generic collider experiment
 *  Copyright (C) 2012-2014  Universite catholique de Louvain (UCL), Belgium
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef DelphesClasses_h
#define DelphesClasses_h

/**
 *
 *  Definition of classes to be stored in the root tree.
 *  Function CompareXYZ sorts objects by the variable XYZ that MUST be
 *  present in the data members of the root tree class of the branch.
 *
 *  \author P. Demin - UCL, Louvain-la-Neuve
 *
 */

// Dependencies (#includes)

#include "TLorentzVector.h"
#include "TMatrixDSym.h"
#include "TObject.h"
#include "TRef.h"
#include "TRefArray.h"

#include "classes/SortableObject.h"

class DelphesFactory;

//---------------------------------------------------------------------------

class Event: public TObject
{
public:
  Long64_t Number; // event number

  Float_t ReadTime; // read time
  Float_t ProcTime; // processing time

  ClassDef(Event, 1)
};

//---------------------------------------------------------------------------

class LHCOEvent: public Event
{
public:
  Int_t Trigger; // trigger word

  ClassDef(LHCOEvent, 1)
};

//---------------------------------------------------------------------------

class LHEFEvent: public Event
{
public:
  Int_t ProcessID; // subprocess code for the event | hepup.IDPRUP

  Float_t Weight; // weight for the event | hepup.XWGTUP
  Float_t CrossSection; // cross-section (read from init, implemented only for Wizard evgen)
  Float_t ScalePDF; // scale in GeV used in the calculation of the PDFs in the event | hepup.SCALUP
  Float_t AlphaQED; // value of the QED coupling used in the event | hepup.AQEDUP
  Float_t AlphaQCD; // value of the QCD coupling used in the event | hepup.AQCDUP

  ClassDef(LHEFEvent, 3)
};

//---------------------------------------------------------------------------

class LHEFWeight: public TObject
{
public:
  Int_t ID; // weight ID
  Float_t Weight; // weight value

  ClassDef(LHEFWeight, 1)
};

//---------------------------------------------------------------------------

class HepMCEvent: public Event
{
public:
  Int_t ProcessID; // unique signal process id | signal_process_id()
  Int_t MPI; // number of multi parton interactions | mpi ()

  Float_t Weight; // weight for the event
  Float_t CrossSection; // cross-section in pb
  Float_t CrossSectionError; // cross-section error in pb

  Float_t Scale; // energy scale, see hep-ph/0109068 | event_scale()
  Float_t AlphaQED; // QED coupling, see hep-ph/0109068 | alphaQED()
  Float_t AlphaQCD; // QCD coupling, see hep-ph/0109068 | alphaQCD()

  Int_t ID1; // flavour code of first parton | pdf_info()->id1()
  Int_t ID2; // flavour code of second parton | pdf_info()->id2()

  Float_t X1; // fraction of beam momentum carried by first parton ("beam side") | pdf_info()->x1()
  Float_t X2; // fraction of beam momentum carried by second parton ("target side") | pdf_info()->x2()

  Float_t ScalePDF; // Q-scale used in evaluation of PDF's (in GeV) | pdf_info()->scalePDF()

  Float_t PDF1; // PDF (id1, x1, Q) | pdf_info()->pdf1()
  Float_t PDF2; // PDF (id2, x2, Q) | pdf_info()->pdf2()

  ClassDef(HepMCEvent, 3)
};

//---------------------------------------------------------------------------

class GenParticle: public SortableObject
{
public:
  Int_t PID; // particle HEP ID number | hepevt.idhep[number]

  Int_t Status; // particle status | hepevt.isthep[number]
  Int_t IsPU; // 0 or 1 for particles from pile-up interactions

  Int_t M1; // particle 1st mother | hepevt.jmohep[number][0] - 1
  Int_t M2; // particle 2nd mother | hepevt.jmohep[number][1] - 1

  Int_t D1; // particle 1st daughter | hepevt.jdahep[number][0] - 1
  Int_t D2; // particle last daughter | hepevt.jdahep[number][1] - 1

  Int_t Charge; // particle charge

  Float_t Mass; // particle mass

  Float_t E; // particle energy | hepevt.phep[number][3]
  Float_t Px; // particle momentum vector (x component) | hepevt.phep[number][0]
  Float_t Py; // particle momentum vector (y component) | hepevt.phep[number][1]
  Float_t Pz; // particle momentum vector (z component) | hepevt.phep[number][2]

  Float_t P; // particle momentum
  Float_t PT; // particle transverse momentum
  Float_t Eta; // particle pseudorapidity
  Float_t Phi; // particle azimuthal angle
  Float_t Rapidity; // particle rapidity

  Float_t T; // particle vertex position (t component) | hepevt.vhep[number][3]
  Float_t X; // particle vertex position (x component) | hepevt.vhep[number][0]
  Float_t Y; // particle vertex position (y component) | hepevt.vhep[number][1]
  Float_t Z; // particle vertex position (z component) | hepevt.vhep[number][2]

  static CompBase *fgCompare; //!
  const CompBase *GetCompare() const { return fgCompare; }

  TLorentzVector P4() const;

  ClassDef(GenParticle, 2)
};

//---------------------------------------------------------------------------

class Vertex: public SortableObject
{
public:
  Float_t T; // vertex position (t component)
  Float_t X; // vertex position (x component)
  Float_t Y; // vertex position (y component)
  Float_t Z; // vertex position (z component)

  Double_t ErrorT; // vertex position error (t component)
  Double_t ErrorX; // vertex position error (x component)
  Double_t ErrorY; // vertex position error (y component)
  Double_t ErrorZ; // vertex position error (z component)

  Int_t Index; // vertex index
  Int_t NDF; // number of degrees of freedom

  Double_t Sigma; // vertex position (z component) error
  Double_t SumPT2; // sum pt^2 of tracks attached to the vertex
  Double_t GenSumPT2; // sum pt^2 of gen tracks attached to the vertex

  Double_t GenDeltaZ; // distance in z to closest generated vertex
  Double_t BTVSumPT2; // sum pt^2 of tracks attached to the secondary vertex

  TRefArray Constituents; // references to constituents

  static CompBase *fgCompare; //!
  const CompBase *GetCompare() const { return fgCompare; }

  ClassDef(Vertex, 3)
};

//---------------------------------------------------------------------------

class MissingET: public TObject
{
public:
  Float_t MET; // mising transverse energy
  Float_t Eta; // mising energy pseudorapidity
  Float_t Phi; // mising energy azimuthal angle

  TLorentzVector P4() const;

  ClassDef(MissingET, 1)
};

//---------------------------------------------------------------------------

class ScalarHT: public TObject
{
public:
  Float_t HT; // scalar sum of transverse momenta

  ClassDef(ScalarHT, 1)
};

//---------------------------------------------------------------------------

class Rho: public TObject
{
public:
  Float_t Rho; // rho energy density
  Float_t Edges[2]; // pseudorapidity range edges

  ClassDef(Rho, 1)
};

//---------------------------------------------------------------------------

class Weight: public TObject
{
public:
  Float_t Weight; // weight for the event

  ClassDef(Weight, 1)
};

//---------------------------------------------------------------------------

class Photon: public SortableObject
{
public:
  Float_t PT; // photon transverse momentum
  Float_t Eta; // photon pseudorapidity
  Float_t Phi; // photon azimuthal angle

  Float_t E; // photon energy

  Float_t T; // particle arrival time of flight

  Float_t EhadOverEem; // ratio of the hadronic versus electromagnetic energy deposited in the calorimeter

  TRefArray Particles; // references to generated particles

  Float_t IsolationVar; // isolation variable
  Float_t IsolationVarRhoCorr; // isolation variable
  Float_t SumPtCharged; // isolation variable
  Float_t SumPtNeutral; // isolation variable
  Float_t SumPtChargedPU; // isolation variable
  Float_t SumPt; // isolation variable

  Int_t Status; // 1: prompt -- 2: non prompt -- 3: fake

  static CompBase *fgCompare; //!
  const CompBase *GetCompare() const { return fgCompare; }

  TLorentzVector P4() const;

  ClassDef(Photon, 4)
};

//---------------------------------------------------------------------------

class Electron: public SortableObject
{
public:
  Float_t PT; // electron transverse momentum
  Float_t Eta; // electron pseudorapidity
  Float_t Phi; // electron azimuthal angle

  Float_t T; // particle arrival time of flight

  Int_t Charge; // electron charge

  Float_t EhadOverEem; // ratio of the hadronic versus electromagnetic energy deposited in the calorimeter

  TRef Particle; // reference to generated particle

  Float_t IsolationVar; // isolation variable
  Float_t IsolationVarRhoCorr; // isolation variable
  Float_t SumPtCharged; // isolation variable
  Float_t SumPtNeutral; // isolation variable
  Float_t SumPtChargedPU; // isolation variable
  Float_t SumPt; // isolation variable

  Float_t D0; // track transverse impact parameter
  Float_t DZ; // track longitudinal impact parameter
  Float_t ErrorD0; // track transverse impact parameter error
  Float_t ErrorDZ; // track longitudinal impact parameter error

  static CompBase *fgCompare; //!
  const CompBase *GetCompare() const { return fgCompare; }

  TLorentzVector P4() const;

  ClassDef(Electron, 4)
};

//---------------------------------------------------------------------------

class Muon: public SortableObject
{
public:
  Float_t PT; // muon transverse momentum
  Float_t Eta; // muon pseudorapidity
  Float_t Phi; // muon azimuthal angle

  Float_t T; // particle arrival time of flight

  Int_t Charge; // muon charge

  TRef Particle; // reference to generated particle

  Float_t IsolationVar; // isolation variable
  Float_t IsolationVarRhoCorr; // isolation variable
  Float_t SumPtCharged; // isolation variable
  Float_t SumPtNeutral; // isolation variable
  Float_t SumPtChargedPU; // isolation variable
  Float_t SumPt; // isolation variable

  Float_t D0; // track transverse impact parameter
  Float_t DZ; // track longitudinal impact parameter
  Float_t ErrorD0; // track transverse impact parameter error
  Float_t ErrorDZ; // track longitudinal impact parameter error

  static CompBase *fgCompare; //!
  const CompBase *GetCompare() const { return fgCompare; }

  TLorentzVector P4() const;

  ClassDef(Muon, 4)
};

//---------------------------------------------------------------------------

class Jet: public SortableObject
{
public:
  Float_t PT; // jet transverse momentum
  Float_t Eta; // jet pseudorapidity
  Float_t Phi; // jet azimuthal angle

  Float_t T; //particle arrival time of flight

  Float_t Mass; // jet invariant mass

  Float_t DeltaEta; // jet radius in pseudorapidity
  Float_t DeltaPhi; // jet radius in azimuthal angle

  UInt_t Flavor; // jet flavor
  UInt_t FlavorAlgo; // jet flavor
  UInt_t FlavorPhys; // jet flavor

  UInt_t BTag; // 0 or 1 for a jet that has been tagged as containing a heavy quark
  UInt_t BTagAlgo; // 0 or 1 for a jet that has been tagged as containing a heavy quark
  UInt_t BTagPhys; // 0 or 1 for a jet that has been tagged as containing a heavy quark

  UInt_t TauTag; // 0 or 1 for a jet that has been tagged as a tau
  Float_t TauWeight; // probability for jet to be identified as tau

  Int_t Charge; // tau charge

  Float_t EhadOverEem; // ratio of the hadronic versus electromagnetic energy deposited in the calorimeter

  Int_t NCharged; // number of charged constituents
  Int_t NNeutrals; // number of neutral constituents

  Float_t NeutralEnergyFraction;  // charged energy fraction
  Float_t ChargedEnergyFraction;  // neutral energy fraction 

  Float_t Beta; // (sum pt of charged pile-up constituents)/(sum pt of charged constituents)
  Float_t BetaStar; // (sum pt of charged constituents coming from hard interaction)/(sum pt of charged constituents)
  Float_t MeanSqDeltaR; // average distance (squared) between constituent and jet weighted by pt (squared) of constituent
  Float_t PTD; // average pt between constituent and jet weighted by pt of constituent
  Float_t FracPt[5]; // (sum pt of constituents within a ring 0.1*i < DeltaR < 0.1*(i+1))/(sum pt of constituents)

  Float_t Tau[5]; // N-subjettiness

  TLorentzVector SoftDroppedJet;
  TLorentzVector SoftDroppedSubJet1;
  TLorentzVector SoftDroppedSubJet2;

  TLorentzVector TrimmedP4[5]; // first entry (i = 0) is the total Trimmed Jet 4-momenta and from i = 1 to 4 are the trimmed subjets 4-momenta
  TLorentzVector PrunedP4[5]; // first entry (i = 0) is the total Pruned Jet 4-momenta and from i = 1 to 4 are the pruned subjets 4-momenta
  TLorentzVector SoftDroppedP4[5]; // first entry (i = 0) is the total SoftDropped Jet 4-momenta and from i = 1 to 4 are the pruned subjets 4-momenta

  Int_t NSubJetsTrimmed; // number of subjets trimmed
  Int_t NSubJetsPruned; // number of subjets pruned
  Int_t NSubJetsSoftDropped; // number of subjets soft-dropped

  Double_t ExclYmerge23;
  Double_t ExclYmerge34;
  Double_t ExclYmerge45;
  Double_t ExclYmerge56;

  TRefArray Constituents; // references to constituents
  TRefArray Particles; // references to generated particles

  static CompBase *fgCompare; //!
  const CompBase *GetCompare() const { return fgCompare; }

  TLorentzVector P4() const;
  TLorentzVector Area;

  ClassDef(Jet, 4)
};

//---------------------------------------------------------------------------

class Track: public SortableObject
{
public:
  Int_t PID; // HEP ID number

  Int_t Charge; // track charge

  Float_t P; // track momentum
  Float_t PT; // track transverse momentum
  Float_t Eta; // track pseudorapidity
  Float_t Phi; // track azimuthal angle
  Float_t CtgTheta; // track cotangent of theta
  Float_t C; // track curvature inverse

  Float_t EtaOuter; // track pseudorapidity at the tracker edge
  Float_t PhiOuter; // track azimuthal angle at the tracker edge

  Float_t T; // track vertex position (t component)
  Float_t X; // track vertex position (x component)
  Float_t Y; // track vertex position (y component)
  Float_t Z; // track vertex position (z component)

  Float_t TOuter; // track position (t component) at the tracker edge
  Float_t XOuter; // track position (x component) at the tracker edge
  Float_t YOuter; // track position (y component) at the tracker edge
  Float_t ZOuter; // track position (z component) at the tracker edge

  Float_t Xd; // X coordinate of point of closest approach to vertex
  Float_t Yd; // Y coordinate of point of closest approach to vertex
  Float_t Zd; // Z coordinate of point of closest approach to vertex

  Float_t L; // track path length
  Float_t D0; // track transverse impact parameter
  Float_t DZ; // track longitudinal impact parameter

  Float_t ErrorP; // track momentum error
  Float_t ErrorPT; // track transverse momentum error
  Float_t ErrorPhi; // track azimuthal angle error
  Float_t ErrorCtgTheta; // track cotangent of theta error

  Float_t ErrorT; // time measurement error
  Float_t ErrorD0; // track transverse impact parameter error
  Float_t ErrorDZ; // track longitudinal impact parameter error
  Float_t ErrorC; // track curvature error

  // track covariance off-diagonal terms
  Float_t ErrorD0Phi;     
  Float_t ErrorD0C;       
  Float_t ErrorD0DZ;      
  Float_t ErrorD0CtgTheta;   
  Float_t ErrorPhiC;      
  Float_t ErrorPhiDZ;     
  Float_t ErrorPhiCtgTheta ; 
  Float_t ErrorCDZ;       
  Float_t ErrorCCtgTheta;    
  Float_t ErrorDZCtgTheta;   

  TRef Particle; // reference to generated particle

  Int_t VertexIndex; // reference to vertex

  static CompBase *fgCompare; //!
  const CompBase *GetCompare() const { return fgCompare; }

  TLorentzVector P4() const;
  TMatrixDSym CovarianceMatrix() const;

  ClassDef(Track, 3)
};

//---------------------------------------------------------------------------

class Tower: public SortableObject
{
public:
  Float_t ET; // calorimeter tower transverse energy
  Float_t Eta; // calorimeter tower pseudorapidity
  Float_t Phi; // calorimeter tower azimuthal angle

  Float_t E; // calorimeter tower energy

  Float_t T; // ecal deposit time, averaged by sqrt(EM energy) over all particles, not smeared
  Int_t NTimeHits; // number of hits contributing to time measurement

  Float_t Eem; // calorimeter tower electromagnetic energy
  Float_t Ehad; // calorimeter tower hadronic energy

  Float_t Edges[4]; // calorimeter tower edges

  TRefArray Particles; // references to generated particles

  static CompBase *fgCompare; //!
  const CompBase *GetCompare() const { return fgCompare; }

  TLorentzVector P4() const;

  ClassDef(Tower, 2)
};

//---------------------------------------------------------------------------

class ParticleFlowCandidate: public SortableObject
{

public:
  Int_t PID; // HEP ID number

  Int_t Charge; // track charge

  Float_t E; // reconstructed energy [GeV]
  Float_t P; // track momentum
  Float_t PT; // track transverse momentum
  Float_t Eta; // track pseudorapidity
  Float_t Phi; // track azimuthal angle
  Float_t CtgTheta; // track cotangent of theta
  Float_t C; // track curvature inverse

  Float_t EtaOuter; // track pseudorapidity at the tracker edge
  Float_t PhiOuter; // track azimuthal angle at the tracker edge

  Float_t T; // track vertex position (t component)
  Float_t X; // track vertex position (x component)
  Float_t Y; // track vertex position (y component)
  Float_t Z; // track vertex position (z component)

  Float_t TOuter; // track position (t component) at the tracker edge
  Float_t XOuter; // track position (x component) at the tracker edge
  Float_t YOuter; // track position (y component) at the tracker edge
  Float_t ZOuter; // track position (z component) at the tracker edge

  Float_t Xd; // X coordinate of point of closest approach to vertex
  Float_t Yd; // Y coordinate of point of closest approach to vertex
  Float_t Zd; // Z coordinate of point of closest approach to vertex

  Float_t L; // track path length
  Float_t D0; // track transverse impact parameter
  Float_t DZ; // track longitudinal impact parameter

  Float_t ErrorP; // track momentum error
  Float_t ErrorPT; // track transverse momentum error
  Float_t ErrorPhi; // track azimuthal angle error
  Float_t ErrorCtgTheta; // track cotangent of theta error

  Float_t ErrorT; // time measurement error
  Float_t ErrorD0; // track transverse impact parameter error
  Float_t ErrorDZ; // track longitudinal impact parameter error
  Float_t ErrorC; // track curvature error

  // track covariance off-diagonal terms
  Float_t ErrorD0Phi;     
  Float_t ErrorD0C;       
  Float_t ErrorD0DZ;      
  Float_t ErrorD0CtgTheta;   
  Float_t ErrorPhiC;      
  Float_t ErrorPhiDZ;     
  Float_t ErrorPhiCtgTheta ; 
  Float_t ErrorCDZ;       
  Float_t ErrorCCtgTheta;    
  Float_t ErrorDZCtgTheta;   

  Int_t VertexIndex; // reference to vertex

  static CompBase *fgCompare; //!
  const CompBase *GetCompare() const { return fgCompare; }

  TLorentzVector P4() const;
  TMatrixDSym CovarianceMatrix() const;

  Int_t NTimeHits; // number of hits contributing to time measurement

  Float_t Eem; // calorimeter tower electromagnetic energy
  Float_t Ehad; // calorimeter tower hadronic energy

  Float_t Edges[4]; // calorimeter tower edges

  TRefArray Particles; // references to generated particles

  ClassDef(ParticleFlowCandidate, 2)

};

//---------------------------------------------------------------------------

class HectorHit: public SortableObject
{
public:
  Float_t E; // reconstructed energy [GeV]

  Float_t Tx; // angle of the momentum in the horizontal (x,z) plane [urad]
  Float_t Ty; // angle of the momentum in the verical (y,z) plane [urad]

  Float_t T; // time of flight to the detector [s]

  Float_t X; // horizontal distance to the beam [um]
  Float_t Y; // vertical distance to the beam [um]
  Float_t S; // distance to the interaction point [m]

  TRef Particle; // reference to generated particle

  static CompBase *fgCompare; //!
  const CompBase *GetCompare() const { return fgCompare; }

  ClassDef(HectorHit, 1)
};

//---------------------------------------------------------------------------

class Candidate: public SortableObject
{
  friend class DelphesFactory;

public:
  Candidate();

  Int_t PID;

  Int_t Status;
  Int_t M1, M2, D1, D2;

  Int_t Charge;

  Float_t Mass;

  Int_t IsPU;
  Int_t IsRecoPU;

  Int_t IsConstituent;
  Int_t IsFromConversion;

  UInt_t Flavor;
  UInt_t FlavorAlgo;
  UInt_t FlavorPhys;

  UInt_t BTag;
  UInt_t BTagAlgo;
  UInt_t BTagPhys;

  UInt_t TauTag;
  Float_t TauWeight;

  Float_t Eem;
  Float_t Ehad;

  Float_t Edges[4];
  Float_t DeltaEta;
  Float_t DeltaPhi;

  TLorentzVector Momentum, Position, InitialPosition, PositionError, Area;

  Float_t L; // path length
  Float_t DZ;
  Float_t ErrorDZ;
  Float_t ErrorT; // path length
  Float_t D0;
  Float_t ErrorD0;
  Float_t C;
  Float_t ErrorC;
  Float_t P;
  Float_t ErrorP;
  Float_t PT;
  Float_t ErrorPT;
  Float_t CtgTheta;
  Float_t ErrorCtgTheta;
  Float_t Phi;
  Float_t ErrorPhi;

  Float_t Xd;
  Float_t Yd;
  Float_t Zd;

  // tracking resolution

  Float_t TrackResolution;

  // PileUpJetID variables

  Int_t NCharged;
  Int_t NNeutrals;
  Float_t Beta;
  Float_t BetaStar;
  Float_t MeanSqDeltaR;
  Float_t PTD;
  Float_t FracPt[5];
  Float_t NeutralEnergyFraction;  // charged energy fraction
  Float_t ChargedEnergyFraction;  // neutral energy fraction 


  // Timing information

  Int_t NTimeHits;
  std::vector<std::pair<Float_t, Float_t> > ECalEnergyTimePairs;

  // Isolation variables

  Float_t IsolationVar;
  Float_t IsolationVarRhoCorr;
  Float_t SumPtCharged;
  Float_t SumPtNeutral;
  Float_t SumPtChargedPU;
  Float_t SumPt;

  // ACTS compliant 6x6 track covariance (D0, phi, Curvature, dz, ctg(theta))

  TMatrixDSym TrackCovariance;

  // vertex variables

  Int_t ClusterIndex;
  Int_t ClusterNDF;
  Double_t ClusterSigma;
  Double_t SumPT2;
  Double_t BTVSumPT2;
  Double_t GenDeltaZ;
  Double_t GenSumPT2;

  // N-subjettiness variables

  Float_t Tau[5];

  // Other Substructure variables

  TLorentzVector SoftDroppedJet;
  TLorentzVector SoftDroppedSubJet1;
  TLorentzVector SoftDroppedSubJet2;

  TLorentzVector TrimmedP4[5]; // first entry (i = 0) is the total Trimmed Jet 4-momenta and from i = 1 to 4 are the trimmed subjets 4-momenta
  TLorentzVector PrunedP4[5]; // first entry (i = 0) is the total Pruned Jet 4-momenta and from i = 1 to 4 are the pruned subjets 4-momenta
  TLorentzVector SoftDroppedP4[5]; // first entry (i = 0) is the total SoftDropped Jet 4-momenta and from i = 1 to 4 are the pruned subjets 4-momenta

  Int_t NSubJetsTrimmed; // number of subjets trimmed
  Int_t NSubJetsPruned; // number of subjets pruned
  Int_t NSubJetsSoftDropped; // number of subjets soft-dropped

  // Exclusive clustering variables
  Double_t ExclYmerge23;
  Double_t ExclYmerge34;
  Double_t ExclYmerge45;
  Double_t ExclYmerge56;

  // event characteristics variables
  Double_t ParticleDensity; // particle multiplicity density in the proximity of the particle
  
  static CompBase *fgCompare; //!
  const CompBase *GetCompare() const { return fgCompare; }

  void AddCandidate(Candidate *object);
  TObjArray *GetCandidates();

  Bool_t Overlaps(const Candidate *object) const;

  virtual void Copy(TObject &object) const;
  virtual TObject *Clone(const char *newname = "") const;
  virtual void Clear(Option_t *option = "");

private:
  DelphesFactory *fFactory; //!
  TObjArray *fArray; //!

  void SetFactory(DelphesFactory *factory) { fFactory = factory; }

  ClassDef(Candidate, 6)
};

#endif // DelphesClasses_h