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// $Id: CompoundParticle.h,v 1.2 2009/06/10 06:27:50 loizides Exp $
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//
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// CompoundParticle
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//
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// A compound particle class that holds other (daughter) particles. The class provides
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// the same features as the CompositeParticle but allows to transfer ownership of daughters.
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// This class is cannot be stored in a tree.
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//
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// Authors: C.Loizides
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//--------------------------------------------------------------------------------------------------
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#ifndef MITANA_DATATREE_COMPOUNDPARTICLE_H
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#define MITANA_DATATREE_COMPOUNDPARTICLE_H
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#include "MitAna/DataTree/interface/Types.h"
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#include "MitAna/DataTree/interface/Collections.h"
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namespace mithep
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{
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class CompoundParticle : public Particle
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{
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public:
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CompoundParticle();
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void AddDaughter(const Particle *p)
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{ fDaughters1.Add(p); ClearMom(); ClearCharge(); }
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void AddDaughter(Particle *p, Bool_t owned);
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void Clear(Option_t *opt="");
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const Particle *Daughter(UInt_t i) const;
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UInt_t NDaughters() const;
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Bool_t HasDaughter(const Particle *p) const;
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Bool_t HasCommonDaughter(const CompoundParticle *p) const;
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Bool_t HasSameDaughters(const CompoundParticle *p) const;
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EObjType ObjType() const { return kCompoundParticle; }
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protected:
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Double_t GetCharge() const;
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void GetMom() const;
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ParticleOArr fDaughters1; //daughter particles (not owned)
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ParticleOArr fDaughters2; //daughter particles (owned)
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ClassDef(CompoundParticle, 1) // Compound particle class
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};
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}
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//--------------------------------------------------------------------------------------------------
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inline void mithep::CompoundParticle::Clear(Option_t *opt)
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{
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// Clear object.
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fDaughters1.Clear(opt);
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fDaughters2.Clear(opt);
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ClearMom();
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ClearCharge();
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}
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//--------------------------------------------------------------------------------------------------
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inline const mithep::Particle *mithep::CompoundParticle::Daughter(UInt_t i) const
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{
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// Return daughter at given index.
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if (i<fDaughters1.Entries())
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return fDaughters1.At(i);
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return fDaughters2.At(i-fDaughters1.Entries());
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}
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//--------------------------------------------------------------------------------------------------
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inline Double_t mithep::CompoundParticle::GetCharge() const
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{
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// Return sum of charge of daughter particles.
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Double_t charge = 0;
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for (UInt_t i=0; i<NDaughters(); ++i)
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charge += Daughter(i)->Charge();
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return charge;
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}
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//--------------------------------------------------------------------------------------------------
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inline void mithep::CompoundParticle::GetMom() const
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{
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// Calculate the vector sum of the momenta of the daughters.
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FourVector mom;
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for (UInt_t i=0; i<NDaughters(); ++i)
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mom += (Daughter(i))->Mom();
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fCachedMom.SetCoordinates(mom.Pt(),mom.Eta(),mom.Phi(),mom.M());
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}
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//--------------------------------------------------------------------------------------------------
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inline UInt_t mithep::CompoundParticle::NDaughters() const
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{
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// Return number of daughters.
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return (fDaughters1.Entries()+fDaughters2.Entries());
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}
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#endif
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