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Geant4/particles/management/src/G4MuonDecayChannel.cc

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Differences between /particles/management/src/G4MuonDecayChannel.cc (Version 11.3.0) and /particles/management/src/G4MuonDecayChannel.cc (Version 9.6.p1)


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 25 //                                                 25 //
 26 // G4MuonDecayChannel class implementation     << 
 27 //                                                 26 //
 28 // Author: H.Kurashige, 30 May 1997            <<  27 // $Id$
 29 // Contributions:                              <<  28 //
 30 // - 2005 - M.Melissas, J.Brunner CPPM/IN2P3   <<  29 // 
 31 //   Added V-A fluxes for neutrinos using a ne <<  30 // ------------------------------------------------------------
 32 // ------------------------------------------- <<  31 //      GEANT 4 class header file
 33                                                <<  32 //
 34 #include "G4MuonDecayChannel.hh"               <<  33 //      History: first implementation, based on object model of
                                                   >>  34 //      30 May  1997 H.Kurashige
                                                   >>  35 //
                                                   >>  36 //      Fix bug in calcuration of electron energy in DecayIt 28 Feb. 01 H.Kurashige 
                                                   >>  37 //2005
                                                   >>  38 // M. Melissas ( melissas AT cppm.in2p3.fr)
                                                   >>  39 // J. Brunner ( brunner AT cppm.in2p3.fr) 
                                                   >>  40 // Adding V-A fluxes for neutrinos using a new algortithm : 
                                                   >>  41 // ------------------------------------------------------------
 35                                                    42 
 36 #include "G4DecayProducts.hh"                  << 
 37 #include "G4LorentzRotation.hh"                << 
 38 #include "G4LorentzVector.hh"                  << 
 39 #include "G4ParticleDefinition.hh"                 43 #include "G4ParticleDefinition.hh"
 40 #include "G4PhysicalConstants.hh"                  44 #include "G4PhysicalConstants.hh"
 41 #include "G4RotationMatrix.hh"                 << 
 42 #include "G4SystemOfUnits.hh"                      45 #include "G4SystemOfUnits.hh"
                                                   >>  46 #include "G4DecayProducts.hh"
 43 #include "G4VDecayChannel.hh"                      47 #include "G4VDecayChannel.hh"
                                                   >>  48 #include "G4MuonDecayChannel.hh"
 44 #include "Randomize.hh"                            49 #include "Randomize.hh"
                                                   >>  50 #include "G4LorentzVector.hh"
                                                   >>  51 #include "G4LorentzRotation.hh"
                                                   >>  52 #include "G4RotationMatrix.hh"
                                                   >>  53 
                                                   >>  54 G4MuonDecayChannel::G4MuonDecayChannel()
                                                   >>  55                    :G4VDecayChannel()
                                                   >>  56 {
                                                   >>  57 }
 45                                                    58 
 46 G4MuonDecayChannel::G4MuonDecayChannel(const G <<  59 G4MuonDecayChannel::G4MuonDecayChannel(const G4String& theParentName, 
 47   : G4VDecayChannel("Muon Decay", 1)           <<  60                G4double        theBR)
                                                   >>  61                    :G4VDecayChannel("Muon Decay",1)
 48 {                                                  62 {
 49   // set names for daughter particles              63   // set names for daughter particles
 50   if (theParentName == "mu+") {                    64   if (theParentName == "mu+") {
 51     SetBR(theBR);                                  65     SetBR(theBR);
 52     SetParent("mu+");                              66     SetParent("mu+");
 53     SetNumberOfDaughters(3);                       67     SetNumberOfDaughters(3);
 54     SetDaughter(0, "e+");                          68     SetDaughter(0, "e+");
 55     SetDaughter(1, "nu_e");                        69     SetDaughter(1, "nu_e");
 56     SetDaughter(2, "anti_nu_mu");                  70     SetDaughter(2, "anti_nu_mu");
 57   }                                            <<  71   } else if (theParentName == "mu-") {
 58   else if (theParentName == "mu-") {           << 
 59     SetBR(theBR);                                  72     SetBR(theBR);
 60     SetParent("mu-");                              73     SetParent("mu-");
 61     SetNumberOfDaughters(3);                       74     SetNumberOfDaughters(3);
 62     SetDaughter(0, "e-");                          75     SetDaughter(0, "e-");
 63     SetDaughter(1, "anti_nu_e");                   76     SetDaughter(1, "anti_nu_e");
 64     SetDaughter(2, "nu_mu");                       77     SetDaughter(2, "nu_mu");
 65   }                                            <<  78   } else {
 66   else {                                       << 
 67 #ifdef G4VERBOSE                                   79 #ifdef G4VERBOSE
 68     if (GetVerboseLevel() > 0) {               <<  80     if (GetVerboseLevel()>0) {
 69       G4cout << "G4MuonDecayChannel:: construc     81       G4cout << "G4MuonDecayChannel:: constructor :";
 70       G4cout << " parent particle is not muon      82       G4cout << " parent particle is not muon but ";
 71       G4cout << theParentName << G4endl;           83       G4cout << theParentName << G4endl;
 72     }                                              84     }
 73 #endif                                             85 #endif
 74   }                                                86   }
 75 }                                                  87 }
 76                                                    88 
 77 G4MuonDecayChannel& G4MuonDecayChannel::operat <<  89 G4MuonDecayChannel::G4MuonDecayChannel(const G4MuonDecayChannel &right):
                                                   >>  90   G4VDecayChannel(right)
                                                   >>  91 {
                                                   >>  92 }
                                                   >>  93 
                                                   >>  94 G4MuonDecayChannel::~G4MuonDecayChannel()
                                                   >>  95 {
                                                   >>  96 }
                                                   >>  97 
                                                   >>  98 G4MuonDecayChannel & G4MuonDecayChannel::operator=(const G4MuonDecayChannel & right)
 78 {                                                  99 {
 79   if (this != &right) {                        << 100   if (this != &right) { 
 80     kinematics_name = right.kinematics_name;      101     kinematics_name = right.kinematics_name;
 81     verboseLevel = right.verboseLevel;            102     verboseLevel = right.verboseLevel;
 82     rbranch = right.rbranch;                      103     rbranch = right.rbranch;
 83                                                   104 
 84     // copy parent name                           105     // copy parent name
 85     parent_name = new G4String(*right.parent_n    106     parent_name = new G4String(*right.parent_name);
 86                                                   107 
 87     // clear daughters_name array                 108     // clear daughters_name array
 88     ClearDaughtersName();                         109     ClearDaughtersName();
 89                                                   110 
 90     // recreate array                             111     // recreate array
 91     numberOfDaughters = right.numberOfDaughter    112     numberOfDaughters = right.numberOfDaughters;
 92     if (numberOfDaughters > 0) {               << 113     if ( numberOfDaughters >0 ) {
 93       if (daughters_name != nullptr) ClearDaug << 114       if (daughters_name !=0) ClearDaughtersName();
 94       daughters_name = new G4String*[numberOfD    115       daughters_name = new G4String*[numberOfDaughters];
 95       // copy daughters name                   << 116       //copy daughters name
 96       for (G4int index = 0; index < numberOfDa << 117       for (G4int index=0; index < numberOfDaughters; index++) {
 97         daughters_name[index] = new G4String(* << 118           daughters_name[index] = new G4String(*right.daughters_name[index]);
 98       }                                           119       }
 99     }                                             120     }
100   }                                               121   }
101   return *this;                                   122   return *this;
102 }                                                 123 }
103                                                   124 
104 G4DecayProducts* G4MuonDecayChannel::DecayIt(G << 125 G4DecayProducts *G4MuonDecayChannel::DecayIt(G4double) 
105 {                                                 126 {
106   // this version neglects muon polarization,a << 127   // this version neglects muon polarization,and electron mass  
107   //              assumes the pure V-A couplin    128   //              assumes the pure V-A coupling
108   //              the Neutrinos are correctly  << 129   //              the Neutrinos are correctly V-A. 
109                                                << 
110 #ifdef G4VERBOSE                                  130 #ifdef G4VERBOSE
111   if (GetVerboseLevel() > 1) G4cout << "G4Muon << 131   if (GetVerboseLevel()>1) G4cout << "G4MuonDecayChannel::DecayIt ";
112 #endif                                            132 #endif
113                                                   133 
114   CheckAndFillParent();                        << 134   if (parent == 0) FillParent();  
115   CheckAndFillDaughters();                     << 135   if (daughters == 0) FillDaughters();
116                                                << 136  
117   // parent mass                                  137   // parent mass
118   G4double parentmass = G4MT_parent->GetPDGMas << 138   G4double parentmass = parent->GetPDGMass();
119   const G4int N_DAUGHTER = 3;                  << 
120                                                   139 
121   // daughters'mass                            << 140   //daughters'mass
122   G4double daughtermass[N_DAUGHTER];           << 141   G4double daughtermass[3]; 
123   // G4double sumofdaughtermass = 0.0;         << 142   G4double sumofdaughtermass = 0.0;
124   for (G4int index = 0; index < N_DAUGHTER; ++ << 143   for (G4int index=0; index<3; index++){
125     daughtermass[index] = G4MT_daughters[index << 144     daughtermass[index] = daughters[index]->GetPDGMass();
126     // sumofdaughtermass += daughtermass[index << 145     sumofdaughtermass += daughtermass[index];
127   }                                               146   }
128                                                   147 
129   // create parent G4DynamicParticle at rest   << 148    //create parent G4DynamicParticle at rest
130   G4ThreeVector dummy;                            149   G4ThreeVector dummy;
131   auto parentparticle = new G4DynamicParticle( << 150   G4DynamicParticle * parentparticle = new G4DynamicParticle( parent, dummy, 0.0);
132   // create G4Decayproducts                    << 151   //create G4Decayproducts
133   auto products = new G4DecayProducts(*parentp << 152   G4DecayProducts *products = new G4DecayProducts(*parentparticle);
134   delete parentparticle;                          153   delete parentparticle;
135                                                   154 
136   // calculate daughter momentum                  155   // calculate daughter momentum
137   G4double daughtermomentum[N_DAUGHTER];       << 156   G4double daughtermomentum[3];
138   // calculate electron energy                 << 157     // calcurate electron energy
139   G4double xmax = (1.0 + daughtermass[0] * dau << 158   G4double xmax = (1.0+daughtermass[0]*daughtermass[0]/parentmass/parentmass);
140   G4double x;                                     159   G4double x;
141                                                << 160   
142   G4double Ee, Ene;                            << 161   G4double Ee,Ene;
143                                                << 162   
144   G4double gam;                                   163   G4double gam;
145   G4double EMax = parentmass / 2 - daughtermas << 164    G4double EMax=parentmass/2-daughtermass[0];
146                                                << 165    
147   const std::size_t MAX_LOOP = 1000;           << 166   
148   // Generating Random Energy                  << 167    //Generating Random Energy
149   for (std::size_t loop1 = 0; loop1 < MAX_LOOP << 168 do {
150     Ee = G4UniformRand();                      << 169   Ee=G4UniformRand();
151     for (std::size_t loop2 = 0; loop2 < MAX_LO << 170     do{
152       x = xmax * G4UniformRand();              << 171       x=xmax*G4UniformRand();
153       gam = G4UniformRand();                   << 172       gam=G4UniformRand();
154       if (gam <= x * (1. - x)) break;          << 173     }while (gam >x*(1.-x));
155       x = xmax;                                << 174     Ene=x;
156     }                                          << 175   } while ( Ene < (1.-Ee));
157     Ene = x;                                   << 176  G4double Enm=(2.-Ee-Ene);
158     if (Ene >= (1. - Ee)) break;               << 177 
159     Ene = 1. - Ee;                             << 178 
160   }                                            << 179  //initialisation of rotation parameters
161   G4double Enm = (2. - Ee - Ene);              << 180 
162                                                << 181   G4double costheta,sintheta,rphi,rtheta,rpsi;
163   // initialisation of rotation parameters     << 182   costheta= 1.-2./Ee-2./Ene+2./Ene/Ee;
164                                                << 183   sintheta=std::sqrt(1.-costheta*costheta);
165   G4double costheta, sintheta, rphi, rtheta, r << 184   
166   costheta = 1. - 2. / Ee - 2. / Ene + 2. / En << 185 
167   sintheta = std::sqrt(1. - costheta * costhet << 186   rphi=twopi*G4UniformRand()*rad;
168                                                << 187   rtheta=(std::acos(2.*G4UniformRand()-1.));
169   rphi = twopi * G4UniformRand() * rad;        << 188   rpsi=twopi*G4UniformRand()*rad;
170   rtheta = (std::acos(2. * G4UniformRand() - 1 << 
171   rpsi = twopi * G4UniformRand() * rad;        << 
172                                                   189 
173   G4RotationMatrix rot;                           190   G4RotationMatrix rot;
174   rot.set(rphi, rtheta, rpsi);                 << 191   rot.set(rphi,rtheta,rpsi);
175                                                   192 
176   // electron 0                                << 193   //electron 0
177   daughtermomentum[0] = std::sqrt(Ee * Ee * EM << 194   daughtermomentum[0]=std::sqrt(Ee*Ee*EMax*EMax+2.0*Ee*EMax * daughtermass[0]);
178   G4ThreeVector direction0(0.0, 0.0, 1.0);     << 195   G4ThreeVector direction0(0.0,0.0,1.0);
179                                                   196 
180   direction0 *= rot;                              197   direction0 *= rot;
181                                                   198 
182   auto daughterparticle =                      << 199   G4DynamicParticle * daughterparticle = new G4DynamicParticle ( daughters[0],   direction0 * daughtermomentum[0]);
183     new G4DynamicParticle(G4MT_daughters[0], d << 
184                                                   200 
185   products->PushProducts(daughterparticle);       201   products->PushProducts(daughterparticle);
                                                   >> 202   
                                                   >> 203   //electronic neutrino  1
186                                                   204 
187   // electronic neutrino  1                    << 205   daughtermomentum[1]=std::sqrt(Ene*Ene*EMax*EMax+2.0*Ene*EMax * daughtermass[1]);
188                                                << 206   G4ThreeVector direction1(sintheta,0.0,costheta);
189   daughtermomentum[1] = std::sqrt(Ene * Ene *  << 
190   G4ThreeVector direction1(sintheta, 0.0, cost << 
191                                                   207 
192   direction1 *= rot;                              208   direction1 *= rot;
193                                                   209 
194   auto daughterparticle1 =                     << 210   G4DynamicParticle * daughterparticle1 = new G4DynamicParticle ( daughters[1],  direction1 * daughtermomentum[1]);
195     new G4DynamicParticle(G4MT_daughters[1], d << 
196   products->PushProducts(daughterparticle1);      211   products->PushProducts(daughterparticle1);
197                                                   212 
198   // muonnic neutrino 2                        << 213   //muonnic neutrino 2
199                                                << 214   
200   daughtermomentum[2] = std::sqrt(Enm * Enm *  << 215      daughtermomentum[2]=std::sqrt(Enm*Enm*EMax*EMax +2.0*Enm*EMax*daughtermass[2]);
201   G4ThreeVector direction2(-Ene / Enm * sinthe << 216   G4ThreeVector direction2(-Ene/Enm*sintheta,0,-Ee/Enm-Ene/Enm*costheta);
202                                                   217 
203   direction2 *= rot;                              218   direction2 *= rot;
204                                                   219 
205   auto daughterparticle2 =                     << 220   G4DynamicParticle * daughterparticle2 = new G4DynamicParticle ( daughters[2],
206     new G4DynamicParticle(G4MT_daughters[2], d << 221    direction2 * daughtermomentum[2]);
207   products->PushProducts(daughterparticle2);      222   products->PushProducts(daughterparticle2);
208                                                   223 
209   // output message                            << 224 
                                                   >> 225 
                                                   >> 226 
                                                   >> 227  // output message
210 #ifdef G4VERBOSE                                  228 #ifdef G4VERBOSE
211   if (GetVerboseLevel() > 1) {                 << 229   if (GetVerboseLevel()>1) {
212     G4cout << "G4MuonDecayChannel::DecayIt()"; << 230     G4cout << "G4MuonDecayChannel::DecayIt ";
213     G4cout << " create decay products in rest  << 231     G4cout << "  create decay products in rest frame " <<G4endl;
214     products->DumpInfo();                         232     products->DumpInfo();
215   }                                               233   }
216 #endif                                            234 #endif
217   return products;                                235   return products;
218 }                                                 236 }
                                                   >> 237 
                                                   >> 238 
                                                   >> 239 
                                                   >> 240 
                                                   >> 241 
                                                   >> 242 
219                                                   243