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