BackToBackKinematicConstraint.h

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#ifndef BackToBackKinematicConstraint_H
#define BackToBackKinematicConstraint_H

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

class BackToBackKinematicConstraint:public KinematicConstraint
{
public:

 BackToBackKinematicConstraint() {}
 
 ~BackToBackKinematicConstraint() override {}

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;

AlgebraicVector deviations(int nStates) const override;

int numberOfEquations() const override;

KinematicConstraint * clone() const override;

private:


};
#endif