P4JacobianPxPyPzE2PxPyPzM Class Reference

#include <P4JacobianPxPyPzE2PxPyPzM.h>

Inheritance diagram for P4JacobianPxPyPzE2PxPyPzM:

Collaboration diagram for P4JacobianPxPyPzE2PxPyPzM:

Public Member Functions
	P4JacobianPxPyPzE2PxPyPzM (double px, double py, double pz, double E)

Detailed Description

Definition at line 10 of file P4JacobianPxPyPzE2PxPyPzM.h.

Constructor & Destructor Documentation

P4JacobianPxPyPzE2PxPyPzM()

P4JacobianPxPyPzE2PxPyPzM::P4JacobianPxPyPzE2PxPyPzM	(	double	px,
		double	py,
		double	pz,
		double	E )

Definition at line 10 of file P4JacobianPxPyPzE2PxPyPzM.cxx.

                                        :
  HepMatrix(4,4,0)
{
  double pt2 = px*px + py*py;
  double p2 = pt2 + pz*pz;
  double M = std::sqrt( std::max( 0., E*E - p2));
 
  (*this)[0][0] = 1; // dpx/dpx
  (*this)[1][1] = 1; // dpy/dpy
  (*this)[2][2] = 1; // dpz/dpz
 
  (*this)[3][0] = -px/M;     // dM/dpx
  (*this)[3][1] = -py/M;     // dM/dpy
  (*this)[3][2] = -pz/M;     // dM/dpz
  (*this)[3][3] = E/M;       // dM/dE
}

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

• P4JacobianPxPyPzE2PxPyPzM.h
• P4JacobianPxPyPzE2PxPyPzM.cxx