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//--------------------------------------------------------------------------------------------------
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// $Id: CompositeParticle.h,v 1.18 2009/02/18 15:38:54 loizides Exp $
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//
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// Composite Particle
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//
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// A composite particle class that holds other (daughter) particles.
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//
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// Authors: J.Bendavid, C.Loizides
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//--------------------------------------------------------------------------------------------------
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#ifndef MITANA_DATATREE_COMPOSITEPARTICLE_H
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#define MITANA_DATATREE_COMPOSITEPARTICLE_H
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#include "MitAna/DataTree/interface/Types.h"
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#include "MitAna/DataTree/interface/Particle.h"
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#include "MitAna/DataCont/interface/RefArray.h"
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namespace mithep
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{
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class CompositeParticle : public Particle
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{
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public:
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CompositeParticle() {}
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void AddDaughter(const Particle *p) { fDaughters.Add(p); ClearMom(); ClearCharge(); }
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void Clear(Option_t *opt="") { fDaughters.Clear(opt); ClearMom(); ClearCharge(); }
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const Particle *Daughter(UInt_t i) const { return fDaughters.At(i); }
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UInt_t NDaughters() const { return fDaughters.Entries(); }
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Bool_t HasDaughter(const Particle *p) const;
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Bool_t HasCommonDaughter(const CompositeParticle *p) const;
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Bool_t HasSameDaughters(const CompositeParticle *p) const;
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EObjType ObjType() const { return kCompositeParticle; }
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protected:
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Double_t GetCharge() const;
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void GetMom() const;
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RefArray<Particle> fDaughters; //references to daughter particles
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ClassDef(CompositeParticle, 1) // Composite particle class
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};
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}
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//--------------------------------------------------------------------------------------------------
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inline Double_t mithep::CompositeParticle::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::CompositeParticle::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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#endif
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