FML3PtSmearer.h

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#ifndef FML3PtSmearer_H
#define FML3PtSmearer_H

#include "DataFormats/Math/interface/LorentzVector.h"
#include "DataFormats/Math/interface/Vector3D.h"

// class declarations

class RandomEngine;

class FML3PtSmearer {

public:

  FML3PtSmearer(const RandomEngine * engine);
 
  ~FML3PtSmearer();
 
  math::XYZTLorentzVector smear(math::XYZTLorentzVector simP4 , math::XYZVector recP3) const;

private:

  static double MuonMassSquared_;

  const RandomEngine * random;
  double error(double thePt, double theEta) const;
  double shift(double thePt, double theEta) const;
  double funShift(double x) const;
  double funSigma(double eta , double pt) const;
  double funSigmaPt(double x) const;
  double funSigmaEta(double x) const;


};

#endif