/data/refman/pasoursint/CMSSW_5_2_7_hltpatch1/src/RecoVertex/KinematicFit/interface/MassKinematicConstraint.h

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#ifndef MassKinematicConstraint_H
#define MassKinematicConstraint_H

#include "RecoVertex/KinematicFitPrimitives/interface/KinematicConstraint.h"
#include "RecoVertex/KinematicFitPrimitives/interface/ParticleMass.h"

class MassKinematicConstraint:public KinematicConstraint
{

public:

 MassKinematicConstraint(const ParticleMass& m, const float sigma);
                                       
 
virtual std::pair<AlgebraicVector,AlgebraicVector> value(const AlgebraicVector& exPoint) const;

virtual std::pair<AlgebraicMatrix, AlgebraicVector> derivative(const AlgebraicVector& exPoint) const;

virtual std::pair<AlgebraicVector, AlgebraicVector> value(const std::vector<RefCountedKinematicParticle> par) const;

virtual std::pair<AlgebraicMatrix, AlgebraicVector> derivative(const std::vector<RefCountedKinematicParticle> par) const;

virtual int numberOfEquations() const;

virtual AlgebraicVector deviations(int nStates) const;

virtual MassKinematicConstraint * clone() const
 {return new MassKinematicConstraint(*this);}

private:
  ParticleMass mass;
  AlgebraicVector dd; 
};

#endif