G4XPDGTotal Class Reference

#include <G4XPDGTotal.hh>

Inheritance diagram for G4XPDGTotal:

Public Member Functions
	G4XPDGTotal ()
virtual	~G4XPDGTotal ()
G4bool	operator== (const G4XPDGTotal &right) const
G4bool	operator!= (const G4XPDGTotal &right) const
virtual G4double	CrossSection (const G4KineticTrack &trk1, const G4KineticTrack &trk2) const
virtual const G4CrossSectionVector *	GetComponents () const
virtual G4String	Name () const
virtual G4bool	IsValid (G4double e) const
virtual G4double	LowLimit () const
Public Member Functions inherited from G4VCrossSectionSource
	G4VCrossSectionSource ()
virtual	~G4VCrossSectionSource ()
G4bool	operator== (const G4VCrossSectionSource &right) const
G4bool	operator!= (const G4VCrossSectionSource &right) const
virtual void	Print () const
virtual void	PrintAll (const G4KineticTrack &trk1, const G4KineticTrack &trk2) const
virtual G4double	HighLimit () const

Additional Inherited Members
Protected Member Functions inherited from G4VCrossSectionSource
G4bool	InLimits (G4double e, G4double eLow, G4double eHigh) const
const G4ParticleDefinition *	FindLightParticle (const G4KineticTrack &trk1, const G4KineticTrack &trk2) const
G4double	FcrossX (G4double e, G4double e0, G4double sigma, G4double eParam, G4double power) const
const G4ParticleDefinition *	FindKeyParticle (const G4KineticTrack &trk1, const G4KineticTrack &trk2) const

Detailed Description

Definition at line 55 of file G4XPDGTotal.hh.

Constructor & Destructor Documentation

G4XPDGTotal()

G4XPDGTotal::G4XPDGTotal

(

)

Definition at line 70 of file G4XPDGTotal.cc.

{
  std::pair<const G4ParticleDefinition *,const G4ParticleDefinition *> pp(G4Proton::ProtonDefinition(),
                    G4Proton::ProtonDefinition());
  std::pair<const G4ParticleDefinition *,const G4ParticleDefinition *> pn(G4Proton::ProtonDefinition(),
                    G4Neutron::NeutronDefinition());
  std::pair<const G4ParticleDefinition *,const G4ParticleDefinition *> piPlusp(G4PionPlus::PionPlusDefinition(),
                     G4Proton::ProtonDefinition());
  std::pair<const G4ParticleDefinition *,const G4ParticleDefinition *> piMinusp(G4PionMinus::PionMinusDefinition(),
                      G4Proton::ProtonDefinition());
  std::pair<const G4ParticleDefinition *,const G4ParticleDefinition *> KPlusp(G4KaonPlus::KaonPlusDefinition(),
                    G4Proton::ProtonDefinition());
  std::pair<const G4ParticleDefinition *,const G4ParticleDefinition *> KPlusn(G4KaonPlus::KaonPlusDefinition(),
                    G4Neutron::NeutronDefinition());
  std::pair<const G4ParticleDefinition *,const G4ParticleDefinition *> KMinusp(G4KaonMinus::KaonMinusDefinition(),
                     G4Proton::ProtonDefinition());
  std::pair<const G4ParticleDefinition *,const G4ParticleDefinition *> KMinusn(G4KaonMinus::KaonMinusDefinition(),
                     G4Neutron::NeutronDefinition());
  std::pair<const G4ParticleDefinition *,const G4ParticleDefinition *> gp(G4Gamma::GammaDefinition(),
                    G4Proton::ProtonDefinition());
  std::pair<const G4ParticleDefinition *,const G4ParticleDefinition *> gg(G4Gamma::GammaDefinition(),
                    G4Gamma::GammaDefinition());
  std::pair<const G4ParticleDefinition *,const G4ParticleDefinition *> nn(G4Neutron::NeutronDefinition(),
                    G4Neutron::NeutronDefinition());
 
  std::vector<G4double> nnData;
  std::vector<G4double> ppData;
  std::vector<G4double> pnData;
  std::vector<G4double> pipData;
  std::vector<G4double> KpData;
  std::vector<G4double> KnData;
  std::vector<G4double> gpData;
  std::vector<G4double> ggData;
 
  G4int i;
  for (i=0; i<2; i++) 
    {   
      nnData.push_back(ppPDGFit[i] * GeV); 
      ppData.push_back(ppPDGFit[i] * GeV); 
      pnData.push_back(npPDGFit[i] * GeV); 
      pipData.push_back(pipPDGFit[i] * GeV); 
      KpData.push_back(KpPDGFit[i] * GeV); 
      KnData.push_back(KnPDGFit[i] * GeV); 
      gpData.push_back(gammapPDGFit[i] * GeV); 
      ggData.push_back(gammagammaPDGFit[i] * GeV); 
    }
  for (i=2; i<nFit; i++) 
    {   
      nnData.push_back(ppPDGFit[i]); 
      ppData.push_back(ppPDGFit[i]); 
      pnData.push_back(npPDGFit[i]); 
      pipData.push_back(pipPDGFit[i]); 
      KpData.push_back(KpPDGFit[i]); 
      KnData.push_back(KnPDGFit[i]); 
      gpData.push_back(gammapPDGFit[i]); 
      ggData.push_back(gammagammaPDGFit[i]); 
    }
 
  xMap[pp] = ppData;
  xMap[pn] = pnData;
  xMap[piPlusp] = pipData;
  xMap[piMinusp] = pipData;
  xMap[KPlusp] = KpData;
  xMap[KPlusn] = KnData;
  xMap[KMinusp] = KpData;
  xMap[KMinusn] = KnData;
  xMap[gp] = gpData;
  xMap[gg] = ggData;
  xMap[nn] = nnData;
}

~G4XPDGTotal()

G4XPDGTotal::~G4XPDGTotal ( )

virtual

Definition at line 142 of file G4XPDGTotal.cc.

{ }

Member Function Documentation

CrossSection()

G4double G4XPDGTotal::CrossSection ( const G4KineticTrack & trk1, const G4KineticTrack & trk2 ) const

virtual

Implements G4VCrossSectionSource.

Definition at line 158 of file G4XPDGTotal.cc.

{
  G4double sigma = 0.;
 
  G4double sqrtS = (trk1.Get4Momentum() + trk2.Get4Momentum()).mag();
  
  const G4ParticleDefinition* def1 = trk1.GetDefinition();
  const G4ParticleDefinition* def2 = trk2.GetDefinition();
 
  G4double enc1 = def1->GetPDGEncoding();
  G4double enc2 = def2->GetPDGEncoding();
  G4double coeff = -1.;
  if ( (enc1 < 0 && enc2 >0) || (enc2 < 0 && enc1 >0) ) coeff = 1.;
 
  // Order the pair: first is the lower mass particle, second is the higher mass one
  std::pair<const G4ParticleDefinition *,const G4ParticleDefinition *> trkPair(def1,def2);
 
  if (def1->GetPDGMass() > def2->GetPDGMass())
    trkPair = std::pair<const G4ParticleDefinition *,const G4ParticleDefinition *>(def2,def1);
 
  std::vector<G4double> data;   
      
  if (xMap.find(trkPair) != xMap.end())
    {
 
      PairDoubleMap::const_iterator iter;
      for (iter = xMap.begin(); iter != xMap.end(); ++iter)
    {
      std::pair<const G4ParticleDefinition *,const G4ParticleDefinition *> thePair = (*iter).first;
      if (thePair == trkPair)
        {
          data = (*iter).second;
      
          G4double eMinFit = data[0];
          G4double eMaxFit = data[1];
          G4double xFit = data[2];
          G4double y1Fit = data[3];
          G4double y2Fit = data[4];
          
          // Total Cross-section fit, 1998 Review of Particle Properties, European Phys. J. 3(1998), 1
          
          // Parameters from the PDG fit
          static const G4double epsilon = 0.095;
          static const G4double eta1 = -0.34;
          static const G4double eta2 = -0.55;
          
          if (sqrtS < eMinFit || sqrtS > eMaxFit)
          {
              G4cout << "WARNING! G4XPDGTotal::PDGTotal extrapolating cross section at " 
               << sqrtS / GeV 
               << " GeV outside the PDG fit range "
               << eMinFit / GeV << " - " << eMaxFit / GeV << " GeV " << G4endl;
          }
          
          G4double S = (sqrtS * sqrtS) / (GeV*GeV);
          
          sigma = ( (xFit * G4Pow::GetInstance()->powA(S,epsilon)) + 
            (y1Fit * G4Pow::GetInstance()->powA(S,eta1)) + 
            (coeff * y2Fit * G4Pow::GetInstance()->powA(S,eta2)) ) * millibarn;
          
          if (sigma < 0.)
        {
          G4String name1 = def1->GetParticleName();
          G4String name2 = def2->GetParticleName();
          G4cout << "WARNING! G4XPDGTotal::PDGTotal "      
             << name1 << "-" << name2 
             << " total cross section: Ecm " 
             << sqrtS / GeV << " GeV, negative cross section " 
             << sigma / millibarn << " mb set to 0" << G4endl;
          sigma = 0.;
        }
        }
    }
    }
  return sigma;
}

Referenced by G4XpimNTotal::CrossSection(), and G4XpipNTotal::CrossSection().

GetComponents()

virtual const G4CrossSectionVector * G4XPDGTotal::GetComponents ( ) const

inlinevirtual

Implements G4VCrossSectionSource.

Definition at line 69 of file G4XPDGTotal.hh.

{ return 0; }

IsValid()

G4bool G4XPDGTotal::IsValid ( G4double e ) const

virtual

Reimplemented from G4VCrossSectionSource.

Definition at line 244 of file G4XPDGTotal.cc.

{
  G4bool answer = InLimits(e,_lowLimit,_highLimit);
 
  return answer;
}

LowLimit()

virtual G4double G4XPDGTotal::LowLimit ( ) const

inlinevirtual

Reimplemented from G4VCrossSectionSource.

Definition at line 75 of file G4XPDGTotal.hh.

{ return _lowLimit; }

Name()

G4String G4XPDGTotal::Name ( ) const

virtual

Implements G4VCrossSectionSource.

Definition at line 237 of file G4XPDGTotal.cc.

{
  G4String name = "PDGTotal ";
  return name;
}

operator!=()

G4bool G4XPDGTotal::operator!=

(

const G4XPDGTotal &

right

)

const

Definition at line 152 of file G4XPDGTotal.cc.

{
  return (this != (G4XPDGTotal *) &right);
}

operator==()

G4bool G4XPDGTotal::operator==

(

const G4XPDGTotal &

right

)

const

Definition at line 146 of file G4XPDGTotal.cc.

{
  return (this == (G4XPDGTotal *) &right);
}

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

• G4XPDGTotal.hh
• G4XPDGTotal.cc