/data/refman/pasoursint/CMSSW_4_1_8_patch9/src/RecoVertex/KinematicFit/interface/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() {}

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 AlgebraicVector deviations(int nStates) const;

virtual int numberOfEquations() const;

virtual KinematicConstraint * clone() const;

private:


};
#endif