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Public Member Functions
G4XPDGElastic Class Reference

#include <G4XPDGElastic.hh>

Inheritance diagram for G4XPDGElastic:
G4VCrossSectionSource

Public Member Functions

 G4XPDGElastic ()
 
virtual ~G4XPDGElastic ()
 
G4bool operator== (const G4XPDGElastic &right) const
 
G4bool operator!= (const G4XPDGElastic &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
 
G4ParticleDefinition * FindKeyParticle (const G4KineticTrack &trk1, const G4KineticTrack &trk2) const
 
G4double GetTransversePionMass () const
 
G4double GetMinStringMass () const
 

Detailed Description

Definition at line 55 of file G4XPDGElastic.hh.

Constructor & Destructor Documentation

G4XPDGElastic::G4XPDGElastic ( )

Definition at line 75 of file G4XPDGElastic.cc.

References G4AntiProton::AntiProtonDefinition(), python.hepunit::GeV, G4KaonMinus::KaonMinusDefinition(), G4KaonPlus::KaonPlusDefinition(), neutron, G4Neutron::NeutronDefinition(), G4InuclParticleNames::nn, G4PionMinus::PionMinusDefinition(), G4PionPlus::PionPlusDefinition(), G4InuclParticleNames::pn, G4InuclParticleNames::pp, G4InuclParticleNames::proton, and G4Proton::ProtonDefinition().

76 {
77  G4ParticleDefinition * proton = G4Proton::ProtonDefinition();
78  G4ParticleDefinition * neutron = G4Neutron::NeutronDefinition();
79  G4ParticleDefinition * piPlus = G4PionPlus::PionPlusDefinition();
80  G4ParticleDefinition * piMinus = G4PionMinus::PionMinusDefinition();
81  G4ParticleDefinition * KPlus = G4KaonPlus::KaonPlusDefinition();
82  G4ParticleDefinition * KMinus = G4KaonMinus::KaonMinusDefinition();
83  G4ParticleDefinition * antiproton = G4AntiProton::AntiProtonDefinition();
84 
85  std::pair<G4ParticleDefinition *,G4ParticleDefinition *> pp(proton,proton);
86  std::pair<G4ParticleDefinition *,G4ParticleDefinition *> pn(proton,neutron);
87  std::pair<G4ParticleDefinition *,G4ParticleDefinition *> piPlusp(piPlus,proton);
88  std::pair<G4ParticleDefinition *,G4ParticleDefinition *> piMinusp(piMinus,proton);
89  std::pair<G4ParticleDefinition *,G4ParticleDefinition *> KPlusp(KPlus,proton);
90  std::pair<G4ParticleDefinition *,G4ParticleDefinition *> KMinusp(KMinus,proton);
91  std::pair<G4ParticleDefinition *,G4ParticleDefinition *> nn(neutron,neutron);
92  std::pair<G4ParticleDefinition *,G4ParticleDefinition *> ppbar(proton,antiproton);
93  std::pair<G4ParticleDefinition *,G4ParticleDefinition *> npbar(antiproton,neutron);
94 
95  std::vector<G4double> ppData;
96  std::vector<G4double> pPiPlusData;
97  std::vector<G4double> pPiMinusData;
98  std::vector<G4double> pKPlusData;
99  std::vector<G4double> pKMinusData;
100  std::vector<G4double> ppbarData;
101  std::vector<G4double> npbarData;
102 
103  G4int i;
104  for (i=0; i<2; i++)
105  {
106  ppData.push_back(ppPDGFit[i] * GeV);
107  pPiPlusData.push_back(pPiPlusPDGFit[i] * GeV);
108  pPiMinusData.push_back(pPiMinusPDGFit[i] * GeV);
109  pKPlusData.push_back(pKPlusPDGFit[i] * GeV);
110  pKMinusData.push_back(pKMinusPDGFit[i] * GeV);
111  ppbarData.push_back(ppbarPDGFit[i] * GeV);
112  npbarData.push_back(npbarPDGFit[i] * GeV);
113  }
114 
115  for (i=2; i<nPar; i++)
116  {
117  ppData.push_back(ppPDGFit[i]);
118  pPiPlusData.push_back(pPiPlusPDGFit[i]);
119  pPiMinusData.push_back(pPiMinusPDGFit[i]);
120  pKPlusData.push_back(pKPlusPDGFit[i]);
121  pKMinusData.push_back(pKMinusPDGFit[i]);
122  ppbarData.push_back(ppbarPDGFit[i]);
123  npbarData.push_back(npbarPDGFit[i]);
124  }
125 
126  xMap[nn] = ppData;
127  xMap[pp] = ppData;
128  xMap[pn] = ppData;
129  xMap[piPlusp] = pPiPlusData;
130  xMap[piMinusp] = pPiMinusData;
131  xMap[KPlusp] = pKPlusData;
132  xMap[KMinusp] = pKMinusData;
133  xMap[ppbar] = ppbarData;
134  xMap[npbar] = npbarData;
135 }
G4KaonPlus::KaonPlusDefinition
static G4KaonPlus * KaonPlusDefinition()
Definition: G4KaonPlus.cc:108
G4KaonMinus::KaonMinusDefinition
static G4KaonMinus * KaonMinusDefinition()
Definition: G4KaonMinus.cc:108
G4Proton::ProtonDefinition
static G4Proton * ProtonDefinition()
Definition: G4Proton.cc:88
neutron
Definition: G4DataQuestionaire.hh:35
G4AntiProton::AntiProtonDefinition
static G4AntiProton * AntiProtonDefinition()
Definition: G4AntiProton.cc:88
G4int
int G4int
Definition: G4Types.hh:78
G4PionMinus::PionMinusDefinition
static G4PionMinus * PionMinusDefinition()
Definition: G4PionMinus.cc:93
G4PionPlus::PionPlusDefinition
static G4PionPlus * PionPlusDefinition()
Definition: G4PionPlus.cc:93
G4Neutron::NeutronDefinition
static G4Neutron * NeutronDefinition()
Definition: G4Neutron.cc:99
G4XPDGElastic::~G4XPDGElastic ( )
virtual

Definition at line 138 of file G4XPDGElastic.cc.

139 { }

Member Function Documentation

G4double G4XPDGElastic::CrossSection ( const G4KineticTrack &  trk1,
const G4KineticTrack &  trk2 
) const
virtual

Implements G4VCrossSectionSource.

Definition at line 154 of file G4XPDGElastic.cc.

References G4cout, G4endl, G4KineticTrack::Get4Momentum(), G4KineticTrack::GetDefinition(), G4ParticleDefinition::GetParticleName(), G4ParticleDefinition::GetPDGMass(), python.hepunit::GeV, G4INCL::Math::max(), and python.hepunit::millibarn.

Referenced by G4XMesonBaryonElastic::CrossSection().

155 {
156  // Elastic Cross-section fit, 1994 Review of Particle Properties, (1994), 1
157 
158  G4double sigma = 0.;
159 
160  G4ParticleDefinition* def1 = trk1.GetDefinition();
161  G4ParticleDefinition* def2 = trk2.GetDefinition();
162 
163  G4double sqrtS = (trk1.Get4Momentum() + trk2.Get4Momentum()).mag();
164  G4double m_1 = def1->GetPDGMass();
165  G4double m_2 = def2->GetPDGMass();
166  G4double m_max = std::max(m_1,m_2);
167  // if (m1 > m) m = m1;
168 
169  G4double pLab = 0.;
170 
171  if (m_max > 0. && sqrtS > (m_1 + m_2))
172  {
173  pLab = std::sqrt( (sqrtS*sqrtS - (m_1+m_2)*(m_1+m_2) ) * (sqrtS*sqrtS - (m_1-m_2)*(m_1-m_2)) ) / (2*m_max);
174 
175  // The PDG fit formula requires p in GeV/c
176 
177  // Order the pair: first is the lower mass particle, second is the higher mass one
178  std::pair<G4ParticleDefinition *,G4ParticleDefinition *> trkPair(def1,def2);
179  if (def1->GetPDGMass() > def2->GetPDGMass())
180  trkPair = std::pair<G4ParticleDefinition *,G4ParticleDefinition *>(def2,def1);
181 
182  std::vector<G4double> data;
183  G4double pMinFit = 0.;
184  G4double pMaxFit = 0.;
185  G4double aFit = 0.;
186  G4double bFit = 0.;
187  G4double cFit = 0.;
188  G4double dFit = 0.;
189  G4double nFit = 0.;
190 
191  // Debug
192 // G4cout << "Map has " << xMap.size() << " elements" << G4endl;
193  // Debug end
194 
195  if (xMap.find(trkPair) != xMap.end())
196  {
197  PairDoubleMap::const_iterator iter;
198  for (iter = xMap.begin(); iter != xMap.end(); ++iter)
199  {
200  std::pair<G4ParticleDefinition *,G4ParticleDefinition *> thePair = (*iter).first;
201  if (thePair == trkPair)
202  {
203  data = (*iter).second;
204  pMinFit = data[0];
205  pMaxFit = data[1];
206  aFit = data[2];
207  bFit = data[3];
208  cFit = data[5];
209  dFit = data[6];
210  nFit = data[4];
211 
212  if (pLab < pMinFit) return 0.0;
213  if (pLab > pMaxFit )
214  G4cout << "WARNING! G4XPDGElastic::PDGElastic "
215  << trk1.GetDefinition()->GetParticleName() << "-"
216  << trk2.GetDefinition()->GetParticleName()
217  << " elastic cross section: momentum "
218  << pLab / GeV << " GeV outside valid fit range "
219  << pMinFit /GeV << "-" << pMaxFit / GeV
220  << G4endl;
221 
222  pLab /= GeV;
223  if (pLab > 0.)
224  {
225  G4double logP = std::log(pLab);
226  sigma = aFit + bFit * std::pow(pLab, nFit) + cFit * logP*logP + dFit * logP;
227  sigma = sigma * millibarn;
228  }
229  }
230  }
231  }
232  else
233  {
234  G4cout << "G4XPDGElastic::CrossSection - Data not found in Map" << G4endl;
235  }
236  }
237 
238  if (sigma < 0.)
239  {
240  G4cout << "WARNING! G4XPDGElastic::PDGElastic "
241  << def1->GetParticleName() << "-" << def2->GetParticleName()
242  << " elastic cross section: momentum "
243  << pLab << " GeV, negative cross section "
244  << sigma / millibarn << " mb set to 0" << G4endl;
245  sigma = 0.;
246  }
247 
248  return sigma;
249 }
python.hepunit.millibarn
int millibarn
Definition: hepunit.py:40
G4ParticleDefinition::GetParticleName
const G4String & GetParticleName() const
Definition: G4ParticleDefinition.hh:159
G4KineticTrack::GetDefinition
G4ParticleDefinition * GetDefinition() const
Definition: G4KineticTrack.hh:213
G4cout
G4GLOB_DLL std::ostream G4cout
G4ParticleDefinition::GetPDGMass
G4double GetPDGMass() const
Definition: G4ParticleDefinition.hh:161
G4INCL::Math::max
T max(const T t1, const T t2)
brief Return the largest of the two arguments
Definition: G4INCLGlobals.hh:116
G4endl
#define G4endl
Definition: G4ios.hh:61
G4double
double G4double
Definition: G4Types.hh:76
G4KineticTrack::Get4Momentum
const G4LorentzVector & Get4Momentum() const
Definition: G4KineticTrack.hh:248
data
const XML_Char const XML_Char * data
Definition: include/expat.h:268
virtual const G4CrossSectionVector* G4XPDGElastic::GetComponents ( ) const
inlinevirtual

Implements G4VCrossSectionSource.

Definition at line 69 of file G4XPDGElastic.hh.

69 { return 0; }
G4bool G4XPDGElastic::IsValid ( G4double  e) const
virtual

Reimplemented from G4VCrossSectionSource.

Definition at line 259 of file G4XPDGElastic.cc.

References G4VCrossSectionSource::InLimits().

260 {
261  G4bool answer = InLimits(e,_lowLimit,_highLimit);
262 
263  return answer;
264 }
G4bool
bool G4bool
Definition: G4Types.hh:79
G4VCrossSectionSource::InLimits
G4bool InLimits(G4double e, G4double eLow, G4double eHigh) const
Definition: G4VCrossSectionSource.cc:133
virtual G4double G4XPDGElastic::LowLimit ( ) const
inlinevirtual

Reimplemented from G4VCrossSectionSource.

Definition at line 75 of file G4XPDGElastic.hh.

75 { return _lowLimit; }
G4String G4XPDGElastic::Name ( ) const
virtual

Implements G4VCrossSectionSource.

Definition at line 252 of file G4XPDGElastic.cc.

253 {
254  G4String name = "PDGElastic ";
255  return name;
256 }
name
const XML_Char * name
Definition: include/expat.h:151
G4bool G4XPDGElastic::operator!= ( const G4XPDGElastic &  right) const

Definition at line 148 of file G4XPDGElastic.cc.

149 {
150  return (this != (G4XPDGElastic *) &right);
151 }
G4bool G4XPDGElastic::operator== ( const G4XPDGElastic &  right) const

Definition at line 142 of file G4XPDGElastic.cc.

143 {
144  return (this == (G4XPDGElastic *) &right);
145 }
The documentation for this class was generated from the following files:
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