P4JacobianEEtaPhiM2PtEtaPhiM Class Reference

#include <P4JacobianEEtaPhiM2PtEtaPhiM.h>

Inheritance diagram for P4JacobianEEtaPhiM2PtEtaPhiM:

Collaboration diagram for P4JacobianEEtaPhiM2PtEtaPhiM:

Public Member Functions
	P4JacobianEEtaPhiM2PtEtaPhiM (double E, double eta, double phi, double M)

Detailed Description

Definition at line 10 of file P4JacobianEEtaPhiM2PtEtaPhiM.h.

Constructor & Destructor Documentation

P4JacobianEEtaPhiM2PtEtaPhiM()

P4JacobianEEtaPhiM2PtEtaPhiM::P4JacobianEEtaPhiM2PtEtaPhiM	(	double	E,
		double	eta,
		double	phi,
		double	M )

Definition at line 10 of file P4JacobianEEtaPhiM2PtEtaPhiM.cxx.

                                          :
  HepMatrix(4,4,0)
{
  double t = exp(-eta); // == tg(theta/2)
  double P = std::sqrt( std::max( 0., E*E - M*M));
  double u = 1+t*t; 
  double cosTheta = (1-t*t)/u;
  double sinTheta = 2*t/u;
 
 
  (*this)[0][0] = E/P * sinTheta;          // dPt/dE
  (*this)[0][1] = -P * cosTheta*sinTheta;  // dPt/deta
  (*this)[0][3] = -M/P * sinTheta;         // dPt/dM
 
  (*this)[1][1] = 1;  // deta/deta
  (*this)[2][2] = 1;  // dphi/dphi
  (*this)[3][3] = 1;  // dM/dM
}

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The documentation for this class was generated from the following files:

• P4JacobianEEtaPhiM2PtEtaPhiM.h
• P4JacobianEEtaPhiM2PtEtaPhiM.cxx