#include <P4EEtaPhiMBase.h>

Inheritance diagram for P4EEtaPhiMBase:

Collaboration diagram for P4EEtaPhiMBase:

Public Types
enum	Kind { P4EETAPHIM, P4IPTCOTTHPHIM, P4PTETAPHIM, P4PXPYPZE, UNKNOWN }

Public Member Functions
virtual	~P4EEtaPhiMBase ()
	virtual destructor needed by pool More...

virtual double	px () const
	x component of momentum More...

virtual double	py () const
	y component of momentum More...

virtual double	pz () const
	z component of momentum More...

virtual double	et () const
	transverse energy defined to be e*sin(theta) More...

virtual double	p () const
	magnitude of 3-momentum. More...

virtual double	p2 () const
	square of momentum magnitude More...

virtual double	m2 () const
	mass squared More...

virtual double	pt () const
	transverse momentum More...

virtual double	iPt () const
	inverse of transverse momentum More...

virtual double	rapidity () const
	rapidity More...

virtual double	cosPhi () const
	cosinus phi More...

virtual double	sinPhi () const
	sinus phi More...

virtual double	cotTh () const
	cottan theta More...

virtual double	cosTh () const
	cosinus theta More...

virtual double	sinTh () const
	sinus theta More...

virtual double	tanTh () const
	tan theta More...

virtual CLHEP::HepLorentzVector	hlv () const
	HepLorentzVector Special implementation from Frank Paige : if negative energy, points in opposite direction but eta and phi still the same More...

virtual const I4MomentumError *	errors () const
	Access to errors, if available; returns 0 if no errors. More...

virtual void	set4Mom (const I4Momentum &theI4Mom)
	set all 4-mom from another I4Momentum reference DUMMY IMPLEMENTATION More...

virtual void	set4Mom (const I4Momentum *const theI4Mom)
	set all 4-mom from another I4Momentum pointer DUMMY IMPLEMENTATION More...

virtual void	set4Mom (const CLHEP::HepLorentzVector &theHlv)
	set all 4-mom from a CLHEP HepLorentzVector DUMMY IMPLEMENTATION More...

I4Momentum::Kind	kind () const
	tells what kind of P4XYZT this is More...

virtual std::ostream &	dump (std::ostream &out=std::cout) const
	Print `I4Momentum` content. More...

virtual double	m () const =0
	mass More...

virtual double	eta () const =0
	pseudo rapidity More...

virtual double	phi () const =0
	phi in [-pi,pi[ More...

virtual double	e () const =0
	energy More...

Detailed Description

P4EEtaPhiMBase is a base class for classes with 4-momentum behavior, for which E, eta, phi and M are natural parameters, which is typically the case for a calorimeter object. Any class deriving from it should implement e(), eta(), phi(), m().

Author: David Rousseau rouss.nosp@m.eau@.nosp@m.lal.i.nosp@m.n2p3.nosp@m..fr

Definition at line 25 of file P4EEtaPhiMBase.h.

Member Enumeration Documentation

◆ Kind

enum I4Momentum::Kind

inherited

Enumerator
P4EETAPHIM
P4IPTCOTTHPHIM
P4PTETAPHIM
P4PXPYPZE
UNKNOWN

Definition at line 33 of file I4Momentum.h.

33 { P4EETAPHIM, P4IPTCOTTHPHIM, P4PTETAPHIM, P4PXPYPZE, UNKNOWN };

Constructor & Destructor Documentation

◆ ~P4EEtaPhiMBase()

P4EEtaPhiMBase::~P4EEtaPhiMBase ( )

virtual

virtual destructor needed by pool

Definition at line 11 of file P4EEtaPhiMBase.cxx.

12 {}

Member Function Documentation

◆ cosPhi()

double P4EEtaPhiMBase::cosPhi ( ) const

virtual

cosinus phi

Implements I4Momentum.

Reimplemented in CaloCell, and CaloVertexedCell.

Definition at line 54 of file P4EEtaPhiMBase.cxx.

 { 
  return std::cos(this->phi());
 }

◆ cosTh()

double P4EEtaPhiMBase::cosTh ( ) const

virtual

cosinus theta

Implements I4Momentum.

Reimplemented in CaloCell, and CaloVertexedCell.

Definition at line 82 of file P4EEtaPhiMBase.cxx.

 {
  return std::tanh(this->eta());
 }

◆ cotTh()

double P4EEtaPhiMBase::cotTh ( ) const

virtual

cottan theta

Implements I4Momentum.

Reimplemented in CaloCell.

Definition at line 77 of file P4EEtaPhiMBase.cxx.

 {
  return std::sinh(this->eta());
 }

◆ dump()

std::ostream & P4EEtaPhiMBase::dump ( std::ostream & out = std::cout ) const

virtual

Print I4Momentum content.

Implements I4Momentum.

Definition at line 159 of file P4EEtaPhiMBase.cxx.

 {
  
   std::stringstream outx;
   outx << "[e,eta,phi,m] ="
          << std::right << std::scientific << std::setprecision(8) 
          << std::setw(16) << this->e()
          << std::setw(16) << this->eta()
          << std::setw(16) << this->phi()
          << std::setw(16) << this->m();
  
   out<<outx.str();
   
   return out;
 }

◆ e()

virtual double I4Momentum::e ( ) const

pure virtualinherited

energy

Implemented in CaloTower, CaloCell, CaloVertexedCell, CaloCluster, ParticleSigStateImpl< INavigable_t, I4Momentum_t, IParticle_t >, ParticleImpl< INavigable_t, I4Momentum_t, IParticle_t >, Nav4MomWrapper< Navigable_t, P4Momentum_t >, P4Impl< P4Mom_t >, P4PxPyPzE, P4EEtaPhiM, TrigT2Jet, P4PtEtaPhiMBase, and P4IPtCotThPhiMBase.

◆ errors()

const I4MomentumError * P4EEtaPhiMBase::errors ( ) const

virtual

Access to errors, if available; returns 0 if no errors.

Implements I4Momentum.

Reimplemented in P4EEtaPhiM.

Definition at line 175 of file P4EEtaPhiMBase.cxx.

 {
   return 0;
 }

◆ et()

double P4EEtaPhiMBase::et ( ) const

virtual

transverse energy defined to be e*sin(theta)

Implements I4Momentum.

Reimplemented in CaloCell.

Definition at line 106 of file P4EEtaPhiMBase.cxx.

    {
      return this->e()*this->sinTh();
    }

◆ eta()

virtual double I4Momentum::eta ( ) const

pure virtualinherited

◆ hlv()

CLHEP::HepLorentzVector P4EEtaPhiMBase::hlv ( ) const

virtual

HepLorentzVector Special implementation from Frank Paige : if negative energy, points in opposite direction but eta and phi still the same

Implements I4Momentum.

Reimplemented in CaloCluster.

Definition at line 134 of file P4EEtaPhiMBase.cxx.

 {
   //minimize the number of calculation and dereference
   const double theCosTh=this->cosTh();  
  
   // DR from Frank Paige
   // negative energy point in opposite direction
   // BUT Eta and Phi still the same
   //  double theP=theE;
  
   const double theP=this->p();
  
   const double theSinTh=std::sqrt(1.-theCosTh*theCosTh);
   const double thePt=theP*theSinTh;
   const double thePx=thePt*this->cosPhi();
   const double thePy=thePt*this->sinPhi();
   const double thePz=theP*theCosTh;  
  
  
  return CLHEP::HepLorentzVector(thePx,thePy,thePz,this->e());
  
 }

◆ iPt()

double P4EEtaPhiMBase::iPt ( ) const

virtual

inverse of transverse momentum

Implements I4Momentum.

Definition at line 111 of file P4EEtaPhiMBase.cxx.

112 { return 1./this->pt();

113 }

◆ kind()

I4Momentum::Kind P4EEtaPhiMBase::kind ( ) const

inlinevirtual

tells what kind of P4XYZT this is

Implements I4Momentum.

Definition at line 65 of file P4EEtaPhiMBase.h.

65 { return I4Momentum::P4EETAPHIM; };

◆ m()

virtual double I4Momentum::m ( ) const

pure virtualinherited

◆ m2()

double P4EEtaPhiMBase::m2 ( ) const

virtual

mass squared

Implements I4Momentum.

Definition at line 14 of file P4EEtaPhiMBase.cxx.

                                 {
   const double theM = this->m();
   return theM*theM;
 }

◆ p()

double P4EEtaPhiMBase::p ( ) const

virtual

magnitude of 3-momentum.

Special implementation from Frank Paige : if negative energy p is negative but eta and phi still the same.

Implements I4Momentum.

Definition at line 21 of file P4EEtaPhiMBase.cxx.

 { 
   const double theM=this->m();
   const double theE=this->e();
   //  if (theM==0.) return theE ;
   //    else return sqrt(theE*theE-theM*theM); 
   //DR from Frank Paige
   // if negative energy point in the opposite direction
   // BUT eta and phi still the same !!!
   if (theM==0.) {
     return theE;
   } else {
     double eSign = (theE >= 0) ? +1 : -1;
     return eSign*std::sqrt(theE*theE-theM*theM); 
   }
  
 }

◆ p2()

double P4EEtaPhiMBase::p2 ( ) const

virtual

square of momentum magnitude

This p2() implementaion is derived from the (somewhat unusual) Frank Paige implementation used to calculate p() above. What we do is look at what would happen if we were to square the answer returned by Frank's algorithm:

(1) The "eSign" would square to +1 and disappear, (2) The sqrt would disappear leaving theE*theE-theM*theM (3) In the event that theM==0, this theE*theE would indeed still equal theE*theE-theM*theM, so we simply return this quantity.

Implements I4Momentum.

Definition at line 39 of file P4EEtaPhiMBase.cxx.

 { 
   const double theM=this->m();
   const double theE=this->e();
   
   return theE*theE-theM*theM;
 }

◆ phi()

virtual double I4Momentum::phi ( ) const

pure virtualinherited

◆ pt()

double P4EEtaPhiMBase::pt ( ) const

virtual

transverse momentum

Implements I4Momentum.

Definition at line 101 of file P4EEtaPhiMBase.cxx.

    {
      return this->p()*this->sinTh();
    }

◆ px()

double P4EEtaPhiMBase::px ( ) const

virtual

x component of momentum

Implements I4Momentum.

Definition at line 122 of file P4EEtaPhiMBase.cxx.

123 { return this->pt()*this->cosPhi();

124 }

◆ py()

double P4EEtaPhiMBase::py ( ) const

virtual

y component of momentum

Implements I4Momentum.

Definition at line 126 of file P4EEtaPhiMBase.cxx.

127 { return this->pt()*this->sinPhi();

128 }

◆ pz()

double P4EEtaPhiMBase::pz ( ) const

virtual

z component of momentum

Implements I4Momentum.

Definition at line 130 of file P4EEtaPhiMBase.cxx.

131 { return this->p()*this->cosTh();

132 }

◆ rapidity()

double P4EEtaPhiMBase::rapidity ( ) const

virtual

rapidity

Implements I4Momentum.

Definition at line 115 of file P4EEtaPhiMBase.cxx.

   {
     const double theE=this->e();
     const double thePz=this->pz();
     return 0.5*std::log((theE+thePz)/(theE-thePz));
    }

◆ set4Mom() [1/3]

void P4EEtaPhiMBase::set4Mom ( const CLHEP::HepLorentzVector & theHlv )

virtual

set all 4-mom from a CLHEP HepLorentzVector DUMMY IMPLEMENTATION

Implements I4Momentum.

Reimplemented in CaloCell, P4EEtaPhiM, and CaloCluster.

Definition at line 194 of file P4EEtaPhiMBase.cxx.

 {
   std::cout << "FATAL ERROR dummy P4EEtaPhiMBase::set4Mom called " << std::endl ;
   std::abort();
 }

◆ set4Mom() [2/3]

void P4EEtaPhiMBase::set4Mom ( const I4Momentum & theI4Mom )

virtual

set all 4-mom from another I4Momentum reference DUMMY IMPLEMENTATION

Implements I4Momentum.

Reimplemented in CaloCell, P4EEtaPhiM, and CaloCluster.

Definition at line 181 of file P4EEtaPhiMBase.cxx.

 { 
   std::cout << "FATAL ERROR dummy P4EEtaPhiMBase::set4Mom called " << std::endl; ;
   std::abort();
 }

◆ set4Mom() [3/3]

void P4EEtaPhiMBase::set4Mom ( const I4Momentum *const theI4Mom )

virtual

set all 4-mom from another I4Momentum pointer DUMMY IMPLEMENTATION

Implements I4Momentum.

Reimplemented in CaloCell, P4EEtaPhiM, and CaloCluster.

Definition at line 187 of file P4EEtaPhiMBase.cxx.

 { 
   std::cout << "FATAL ERROR dummy P4EEtaPhiMBase::set4Mom called " << std::endl ;
   std::abort();
  
 }

◆ sinPhi()

double P4EEtaPhiMBase::sinPhi ( ) const

virtual

sinus phi

Implements I4Momentum.

Reimplemented in CaloCell, and CaloVertexedCell.

Definition at line 59 of file P4EEtaPhiMBase.cxx.

 { 
  return std::sin(this->phi());
 }

◆ sinTh()

double P4EEtaPhiMBase::sinTh ( ) const

virtual

sinus theta

Implements I4Momentum.

Reimplemented in CaloCell, and CaloVertexedCell.

Definition at line 87 of file P4EEtaPhiMBase.cxx.

 { 
   // avoid numeric overflow if very large eta
  
   double aEta=std::abs(this->eta());
   if ( aEta>710) {
     aEta=710;
   }
  
   return 1./std::cosh(aEta);
   
 }

◆ tanTh()

double P4EEtaPhiMBase::tanTh ( ) const

virtual

tan theta

Implements I4Momentum.

Definition at line 64 of file P4EEtaPhiMBase.cxx.

 { 
   // avoid numeric overflow if very large eta
  
   double theEta=this->eta();
   if ( std::abs(theEta)>710) {
     theEta=theEta>0 ? 710 : -710;
     return 1./std::sinh(theEta);
   }
  
  return 1./this->cotTh();
 }

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

Public Types

Public Member Functions

Detailed Description

Member Enumeration Documentation

◆ Kind

Constructor & Destructor Documentation

◆ ~P4EEtaPhiMBase()

Member Function Documentation

◆ cosPhi()

◆ cosTh()

◆ cotTh()

◆ dump()

◆ e()

◆ errors()

◆ et()

◆ eta()

◆ hlv()

◆ iPt()

◆ kind()

◆ m()

◆ m2()

◆ p()

◆ p2()

◆ phi()

◆ pt()

◆ px()

◆ py()

◆ pz()

◆ rapidity()

◆ set4Mom() [1/3]

◆ set4Mom() [2/3]

◆ set4Mom() [3/3]

◆ sinPhi()

◆ sinTh()

◆ tanTh()