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//--------------------------------------------------------------------------------------------------
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// $Id: DiTauSystem.h,v 1.10 2009/07/20 04:55:32 loizides Exp $
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//
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// DiTauSystem
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//
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// Class to calculate the mass to the di-tau system. It is assumed that the tau is boosted
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// and that the neutrinos have the same flight direction as the tau. See CMS note 2006/082.
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//
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// Authors: G.Ceballos
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//--------------------------------------------------------------------------------------------------
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#ifndef MITPHYSICS_UTILS_DITAUSYSTEM_H
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#define MITPHYSICS_UTILS_DITAUSYSTEM_H
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#include <Rtypes.h>
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namespace mithep
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{
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class Particle;
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class Met;
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class DiTauSystem {
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public:
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DiTauSystem(const Particle *t1, const Particle *t2, const Met *met);
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Double_t RecoMass() const { return fRecoMass;}
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Double_t TransverseMass() const { return fMT; }
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Double_t TransverseEll() const { return fETll; }
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Double_t TransverseEnn() const { return fETnn; }
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Double_t VisMass() const { return fVisMass; }
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Double_t XTau1() const { return fXTau[0]; }
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Double_t XTau2() const { return fXTau[1]; }
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Double_t Projected() const { return fProj; }
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Double_t ProjectedVis() const { return fProjVis; }
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Double_t ProjectedMet() const { return fProjMet; }
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Double_t ProjectedPhi() const { return fProjPhi; }
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Double_t Ht() const { return fHt; }
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private:
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void Init();
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const Particle *fT1; //first tau
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const Particle *fT2; //second tau
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const Met *fMet; //missing et
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Double_t fXTau[2]; //visible fraction of the tau momenta
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Double_t fRecoMass; //higgs mass
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Double_t fVisMass; //visible mass
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Double_t fMT; //transverse visible mass
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Double_t fETll; //transverse energy of tau products
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Double_t fETnn; //transverse missing energy
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Double_t fProj;
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Double_t fProjMet;
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Double_t fProjVis;
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Double_t fProjPhi;
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Double_t fHt;
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ClassDef(DiTauSystem, 0) // DiTauSystem ala CMS note 2006/082
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};
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}
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#endif
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