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);
                                       
 
std::pair<AlgebraicVector,AlgebraicVector> value(const AlgebraicVector& exPoint) const override;

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

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

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

int numberOfEquations() const override;

AlgebraicVector deviations(int nStates) const override;

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

private:
  ParticleMass mass;
  AlgebraicVector dd; 
};

#endif