TLorentzVectorFactoryEtaE Class Reference

#include <TLorentzVectorFactoryEtaE.h>

Inheritance diagram for TLorentzVectorFactoryEtaE:

Collaboration diagram for TLorentzVectorFactoryEtaE:

Public Member Functions
virtual TLorentzVector	make (double eta, double e) const override

Detailed Description

Definition at line 13 of file TLorentzVectorFactoryEtaE.h.

Member Function Documentation

make()

virtual TLorentzVector TLorentzVectorFactoryEtaE::make ( double  eta, double  e  ) const

inlineoverridevirtual

Implements ITLorentzVectorFactory.

Definition at line 15 of file TLorentzVectorFactoryEtaE.h.

                                                                  {
    if(e <= 0.) {throw std::out_of_range("E < 0");}
 
    double ttOn2 = std::exp(-eta);  //tan(theta/2)
    double tt = 2.*ttOn2/(1.- ttOn2*ttOn2);  // tan(theta)
    double cost = sqrt(1./(1+tt*tt)); // 1+ tan^2(theta) = 1/cos^2(theta)
    double sint = tt*cost;
    TLorentzVector tl;
    tl.SetXYZM(0., e*sint, e*cost, 0.);
    
    return tl;
  }

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

• TLorentzVectorFactoryEtaE.h