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//--------------------------------------------------------------------------------------------------
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// $Id: MCParticle.h,v 1.4 2008/09/22 10:40:07 bendavid Exp $
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//
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// MCParticle
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//
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// Stores MC information for both gen and sim level
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//
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// Authors: C.Loizides, J.Bendavid...
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//--------------------------------------------------------------------------------------------------
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#ifndef MITANA_DATATREE_MCPARTICLE_H
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#define MITANA_DATATREE_MCPARTICLE_H
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#include <TRef.h>
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#include <TDatabasePDG.h>
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#include <TParticlePDG.h>
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#include "MitAna/DataTree/interface/CompositeParticle.h"
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namespace mithep
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{
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class MCParticle : public CompositeParticle
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{
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public:
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MCParticle() : fIsGenerated(kFALSE), fIsSimulated(kFALSE) {}
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MCParticle(Double_t px, Double_t py, Double_t pz, Double_t e, Int_t id, Int_t s) :
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fPdgId(id), fStatus(s),
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fFourVector(px,py,pz,e), fDecayVertex(0,0,0),
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fIsGenerated(kFALSE), fIsSimulated(kFALSE) {}
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~MCParticle() {}
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Int_t AbsPdgId() const { return (fPdgId<0 ? -fPdgId:fPdgId); }
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void AddDaughter(MCParticle *p) { fDaughters.Add(p); }
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Double_t Charge() const;
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const ThreeVector &DecayVertex() const { return fDecayVertex; }
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const MCParticle *Daughter(UInt_t i) const;
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const MCParticle *DistinctMother() const;
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Bool_t HasMother() const { return fMother.IsValid(); }
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Bool_t IsGenerated() const { return fIsGenerated; }
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Bool_t IsSimulated() const { return fIsSimulated; }
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Bool_t IsNeutrino() const;
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const MCParticle *Mother() const;
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FourVector Mom() const { return fFourVector; }
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void SetIsGenerated(Bool_t t=kTRUE) { fIsGenerated = t; }
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void SetIsSimulated(Bool_t t=kTRUE) { fIsSimulated = t; }
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TParticlePDG *PdgEntry() const;
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Int_t PdgId() const { return fPdgId; }
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void SetMom(Double_t px, Double_t py, Double_t pz, Double_t e);
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void SetMother(MCParticle *p) { fMother = p; }
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void SetStatus(Int_t s) { fStatus = s; }
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void SetVertex(Double_t x, Double_t y, Double_t z);
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void SetPdgId(Int_t s) { fPdgId = s; }
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Int_t Status() const { return fStatus; }
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void Print(Option_t *opt="") const;
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enum EPartType {
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kUnknown=0,
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kEl=11, kMu=13, kTau=15,
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kElNu=12, kMuNu=14, kTauNu=16,
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kGlu=21, kGamma=22
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};
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protected:
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Int_t fPdgId; //pdg identifier
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Int_t fStatus; //status flag of generator or simulation
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FourVector fFourVector; //four momentum vector
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ThreeVector fDecayVertex; //gen decay vertex
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TRef fMother; //reference to mother
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Bool_t fIsGenerated; //=true if generated particle
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Bool_t fIsSimulated; //=true if simulated particle
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ClassDef(MCParticle,2) // Generated particle class
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};
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}
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//--------------------------------------------------------------------------------------------------
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inline const mithep::MCParticle *mithep::MCParticle::Daughter(UInt_t i) const
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{
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// Return daughter corresponding to given index.
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return static_cast<const MCParticle*>(fDaughters.At(i));
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}
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//--------------------------------------------------------------------------------------------------
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inline const mithep::MCParticle *mithep::MCParticle::DistinctMother() const
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{
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// Return mother, walking up the tree until a particle with a different pdg from this one
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// is found.
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const mithep::MCParticle *mother = Mother();
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if (!mother) return 0;
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while (mother->PdgId()==fPdgId)
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mother = mother->Mother();
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return mother;
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}
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//--------------------------------------------------------------------------------------------------
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inline const mithep::MCParticle *mithep::MCParticle::Mother() const
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{
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// Return mother.
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return static_cast<const MCParticle*>(fMother.GetObject());
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}
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//--------------------------------------------------------------------------------------------------
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inline Bool_t mithep::MCParticle::IsNeutrino() const
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{
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// Return true if particle is neutrino.
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Int_t ap = AbsPdgId();
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if ((ap==kElNu) ||
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(ap==kMuNu) ||
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(ap==kTauNu))
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return kTRUE;
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return kFALSE;
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}
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//--------------------------------------------------------------------------------------------------
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inline TParticlePDG *mithep::MCParticle::PdgEntry() const
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{
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// Return entry to pdg database.
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return TDatabasePDG::Instance()->GetParticle(fPdgId);
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}
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//--------------------------------------------------------------------------------------------------
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inline void mithep::MCParticle::SetMom(Double_t px, Double_t py, Double_t pz, Double_t e)
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{
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// Set four vector.
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fFourVector.SetXYZT(px, py, pz, e);
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}
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//--------------------------------------------------------------------------------------------------
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inline void mithep::MCParticle::SetVertex(Double_t x, Double_t y, Double_t z)
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{
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// Set decay vertex.
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fDecayVertex.SetXYZ(x,y,z);
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}
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#endif
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