G4QDiffractionRatio.cc

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00030 // G4 Physics class: G4QDiffractionRatio for N+A Diffraction Interactions
00031 // Created: M.V. Kossov, CERN/ITEP(Moscow), 25-OCT-01
00032 // The last update: M.V. Kossov, CERN/ITEP(Moscow) 10-Nov-09
00033 //
00034 // --------------------------------------------------------------------
00035 // Short description: Difraction excitation is a part of the incoherent
00036 // (inelastic) interaction. This part is calculated in the class.
00037 // --------------------------------------------------------------------
00038 
00039 //#define debug
00040 //#define pdebug
00041 //#define fdebug
00042 //#define nandebug
00043 
00044 #include "G4QDiffractionRatio.hh"
00045 #include "G4SystemOfUnits.hh"
00046 
00047 // Returns Pointer to the G4VQCrossSection class
00048 G4QDiffractionRatio* G4QDiffractionRatio::GetPointer()
00049 {
00050   static G4QDiffractionRatio theRatios;   // *** Static body of the Diffraction Ratio ***
00051   return &theRatios;
00052 }
00053 
00054 // Calculation of pair(QuasiFree/Inelastic,QuasiElastic/QuasiFree)
00055 G4double G4QDiffractionRatio::GetRatio(G4double pIU, G4int pPDG, G4int tgZ, G4int tgN)
00056 {
00057   static const G4double mNeut= G4QPDGCode(2112).GetMass()/GeV; // in GeV
00058   static const G4double mProt= G4QPDGCode(2212).GetMass()/GeV; // in GeV
00059   static const G4double mN=.5*(mNeut+mProt);  // mean nucleon mass in GeV
00060   static const G4double dmN=mN+mN;            // doubled nuc. mass in GeV
00061   static const G4double mN2=mN*mN;            // squared nuc. mass in GeV^2
00062   // Table parameters
00063   static const G4int    nps=100;        // Number of steps in the R(s) LinTable
00064   static const G4int    mps=nps+1;      // Number of elements in the R(s) LinTable
00065   static const G4double sma=6.;         // The first LinTabEl(sqs=0)=1., sqs>sma -> logTab
00066   static const G4double ds=sma/nps;     // Step of the linear Table
00067   static const G4int    nls=150;        // Number of steps in the R(lns) logTable
00068   static const G4int    mls=nls+1;      // Number of elements in the R(lns) logTable
00069   static const G4double lsi=1.79;       // The min ln(sqs) logTabEl(sqs=5.99 < sma=6.)
00070   static const G4double lsa=8.;         // The max ln(sqs) logTabEl(sqs=5.99 - 2981 GeV)
00071   static const G4double mi=std::exp(lsi);// The min s of logTabEl(~ 5.99 GeV)
00072   static const G4double max_s=std::exp(lsa);// The max s of logTabEl(~ 2981 GeV)
00073   static const G4double dl=(lsa-lsi)/nls;// Step of the logarithmic Table
00074   static const G4double edl=std::exp(dl);// Multiplication step of the logarithmic Table
00075   static const G4double toler=.0001;    // Tolarence (GeV) defining the same sqs
00076   static G4double lastS=0.;             // Last sqs value for which R was calculated
00077   static G4double lastR=0.;             // Last ratio R which was calculated
00078   // Local Associative Data Base:
00079   static std::vector<G4int>     vA;     // Vector of calculated A
00080   //static std::vector<G4double>  vH;     // Vector of max sqs initialized in the LinTable
00081   //static std::vector<G4int>     vN;     // Vector of topBin number initialized in LinTab
00082   //static std::vector<G4double>  vM;     // Vector of relMax ln(sqs) initialized in LogTab
00083   //static std::vector<G4int>     vK;     // Vector of topBin number initialized in LogTab
00084   static std::vector<G4double*> vT;     // Vector of pointers to LinTable in C++ heap
00085   static std::vector<G4double*> vL;     // Vector of pointers to LogTable in C++ heap
00086   // Last values of the Associative Data Base:
00087   //static G4int     lastPDG=0;           // Last PDG for which R was calculated (now fake)
00088   static G4int     lastA=0;             // theLast of calculated A
00089   //static G4double  lastH=0.;            // theLast max sqs initialized in the LinTable
00090   //static G4int     lastN=0;             // theLast of topBin number initialized in LinTab
00091   //static G4double  lastM=0.;            // theLast relMax ln(sqs) initialized in LogTab
00092   //static G4int     lastK=0;             // theLast of topBin number initialized in LogTab
00093   static G4double* lastT=0;             // theLast of pointer to LinTable in the C++ heap
00094   static G4double* lastL=0;             // theLast of pointer to LogTable in the C++ heap
00095   // LogTable is created only if necessary. R(sqs>2981GeV) calcul by formula for any nuclei
00096   G4int A=tgN+tgZ;
00097   if(pIU<toler || A<1) return 1.;       // Fake use of toler as non zero number
00098   if(A>238)
00099   {
00100     G4cout<<"-*-Warning-*-G4QuasiFreeRatio::GetRatio: A="<<A<<">238, return zero"<<G4endl;
00101     return 0.;
00102   }
00103   //lastPDG=pPDG;                         // @@ at present ratio is PDG independent @@
00104   // Calculate sqs
00105   G4double pM=G4QPDGCode(pPDG).GetMass()/GeV; // Projectile mass in GeV
00106   G4double pM2=pM*pM;
00107   G4double mom=pIU/GeV;                 // Projectile momentum in GeV
00108   G4double s_value=std::sqrt(mN2+pM2+dmN*std::sqrt(pM2+mom*mom)); // in GeV
00109   G4int nDB=vA.size();                  // A number of nuclei already initialized in AMDB
00110   if(nDB && lastA==A && std::fabs(s_value-lastS)<toler) return lastR;
00111   if(s_value>max_s)
00112   {
00113     lastR=CalcDiff2Prod_Ratio(s_value,A);     // @@ Probably user ought to be notified about bigS
00114     return lastR;
00115   }
00116   G4bool found=false;
00117   G4int i=-1;
00118   if(nDB) for (i=0; i<nDB; i++) if(A==vA[i]) // Sirch for this A in AMDB
00119   {
00120     found=true;                         // The A value is found
00121     break;
00122   }
00123   if(!nDB || !found)                    // Create new line in the AMDB
00124   {
00125     lastA = A;
00126     lastT = new G4double[mps];          // Create the linear Table
00127     //lastN = static_cast<int>(s_value/ds)+1;   // MaxBin to be initialized
00128     //if(lastN>nps)                     // ===> Now initialize all lin table
00129     //{
00130     //  lastN=nps;
00131     //  lastH=sma;
00132     //}
00133     //else lastH = lastN*ds;              // Calculate max initialized s for LinTab
00134     G4double sv=0;
00135     lastT[0]=1.;
00136     //for(G4int j=1; j<=lastN; j++)       // Calculate LinTab values
00137     for(G4int j=1; j<=nps; j++)       // Calculate LinTab values
00138     {
00139       sv+=ds;
00140       lastT[j]=CalcDiff2Prod_Ratio(sv,A);
00141     }
00142     lastL = new G4double[mls];          // Create the logarithmic Table
00143     //G4double ls=std::log(s_value);
00144     //lastK = static_cast<int>((ls-lsi)/dl)+1; // MaxBin to be initialized in LogTaB
00145     //if(lastK>nls)                     // ===> Now initialize all lin table
00146     //{
00147     //  lastK=nls;
00148     //  lastM=lsa-lsi;
00149     //}
00150     //else lastM = lastK*dl;              // Calculate max initialized ln(s)-lsi for LogTab
00151     sv=mi;
00152     //for(G4int j=0; j<=lastK; j++)     // Calculate LogTab values
00153     for(G4int j=0; j<=nls; j++)     // Calculate LogTab values
00154     {
00155       lastL[j]=CalcDiff2Prod_Ratio(sv,A);
00156       //if(j!=lastK) sv*=edl;
00157       sv*=edl;
00158     }
00159     i++;                                // Make a new record to AMDB and position on it
00160     vA.push_back(lastA);
00161     //vH.push_back(lastH);
00162     //vN.push_back(lastN);
00163     //vM.push_back(lastM);
00164     //vK.push_back(lastK);
00165     vT.push_back(lastT);
00166     vL.push_back(lastL);
00167   }
00168   else                                  // The A value was found in AMDB
00169   {
00170     lastA=vA[i];
00171     //lastH=vH[i];
00172     //lastN=vN[i];
00173     //lastM=vM[i];
00174     //lastK=vK[i];
00175     lastT=vT[i];
00176     lastL=vL[i];
00177     // ==> Now all bins of the tables are initialized immediately for the A
00178     //if(s_value>lastH)                    // At least LinTab must be updated
00179     //{
00180     //  G4int nextN=lastN+1;               // The next bin to be initialized
00181     //  if(lastN<nps)
00182     //  {
00183     //    lastN = static_cast<int>(s_value/ds)+1;// MaxBin to be initialized
00184     //    G4double sv=lastH;
00185     //    if(lastN>nps)
00186     //    {
00187     //      lastN=nps;
00188     //      lastH=sma;
00189     //    }
00190     //    else lastH = lastN*ds;           // Calculate max initialized s for LinTab
00191     //    for(G4int j=nextN; j<=lastN; j++)// Calculate LogTab values
00192     //    {
00193     //      sv+=ds;
00194     //      lastT[j]=CalcDiff2Prod_Ratio(sv,A);
00195     //    }
00196     //  } // End of LinTab update
00197     //  if(lastN>=nextN)
00198     //  {
00199     //    vH[i]=lastH;
00200     //    vN[i]=lastN;
00201     //  }
00202     //  G4int nextK=lastK+1;
00203     //  if(s_value>sma && lastK<nls)             // LogTab must be updated
00204     //  {
00205     //    G4double sv=std::exp(lastM+lsi); // Define starting poit (lastM will be changed)
00206     //    G4double ls=std::log(s_value);
00207     //    lastK = static_cast<int>((ls-lsi)/dl)+1; // MaxBin to be initialized in LogTaB
00208     //    if(lastK>nls)
00209     //    {
00210     //      lastK=nls;
00211     //      lastM=lsa-lsi;
00212     //    }
00213     //    else lastM = lastK*dl;           // Calcul. max initialized ln(s)-lsi for LogTab
00214     //    for(G4int j=nextK; j<=lastK; j++)// Calculate LogTab values
00215     //    {
00216     //      sv*=edl;
00217     //      lastL[j]=CalcDiff2Prod_Ratio(sv,A);
00218     //    }
00219     //  } // End of LogTab update
00220     //  if(lastK>=nextK)
00221     //  {
00222     //    vM[i]=lastM;
00223     //    vK[i]=lastK;
00224     //  }
00225     //}
00226   }
00227   // Now one can use tabeles to calculate the value
00228   if(s_value<sma)                             // Use linear table
00229   {
00230     G4int n=static_cast<int>(s_value/ds);     // Low edge number of the bin
00231     G4double d=s_value-n*ds;                  // Linear shift
00232     G4double v=lastT[n];                      // Base
00233     lastR=v+d*(lastT[n+1]-v)/ds;              // Result
00234   }
00235   else                                  // Use log table
00236   {
00237     G4double ls=std::log(s_value)-lsi;  // ln(s)-l_min
00238     G4int n=static_cast<int>(ls/dl);    // Low edge number of the bin
00239     G4double d=ls-n*dl;                 // Log shift
00240     G4double v=lastL[n];                // Base
00241     lastR=v+d*(lastL[n+1]-v)/dl;        // Result
00242   }
00243   if(lastR<0.) lastR=0.;
00244   if(lastR>1.) lastR=1.;
00245   return lastR;
00246 } // End of GetRatio
00247 
00248 // Calculate Diffraction/Production Ratio as a function of total sq(s)(hN) (in GeV), A=Z+N
00249 G4double G4QDiffractionRatio::CalcDiff2Prod_Ratio(G4double s_value, G4int A)
00250 {
00251   static G4int    mA=0;
00252   static G4double S=.1; // s=SQRT(M_N^2+M_h^2+2*E_h*M_N)
00253   static G4double R=0.; // Prototype of the result
00254   static G4double p1=0.;
00255   static G4double p2=0.;
00256   static G4double p4=0.;
00257   static G4double p5=0.;
00258   static G4double p6=0.;
00259   static G4double p7=0.;
00260   if(s_value<=0. || A<=1) return 0.;
00261   if(A!=mA && A!=1)
00262   {
00263     S=s_value;
00264     mA=A;
00265     G4double a=mA;
00266     G4double sa=std::sqrt(a);
00267     G4double a2=a*a;
00268     G4double a3=a2*a;
00269     G4double a4=a3*a;
00270     G4double a5=a4*a;
00271     G4double a6=a5*a;
00272     G4double a7=a6*a;
00273     G4double a8=a7*a;
00274     G4double a11=a8*a3;
00275     G4double a12=a8*a4;
00276     p1=(.023*std::pow(a,0.37)+3.5/a3+2.1e6/a12+4.e-14*a5)/(1.+7.6e-4*a*sa+2.15e7/a11);
00277     p2=(1.42*std::pow(a,0.61)+1.6e5/a8+4.5e-8*a4)/(1.+4.e-8*a4+1.2e4/a6);
00278     G4double q=std::pow(a,0.7);
00279     p4=(.036/q+.0009*q)/(1.+6./a3+1.e-7*a3);
00280     p5=1.3*std::pow(a,0.1168)/(1.+1.2e-8*a3);
00281     p6=.00046*(a+11830./a2);
00282     p7=1./(1.+6.17/a2+.00406*a);
00283   }
00284   else if(A==1 && mA!=1)
00285   {
00286     S=s_value;
00287     p1=.0315;
00288     p2=.73417;
00289     p4=.01109;
00290     p5=1.0972;
00291     p6=.065787;
00292     p7=.62976;
00293   }
00294   else if(std::fabs(s_value-S)/S<.0001) return R;
00295   G4double s2=s_value*s_value;
00296   G4double s4=s2*s2;
00297   G4double dl=std::log(s_value)-p5;
00298   R=1./(1.+1./(p1+p2/s4+p4*dl*dl/(1.+p6*std::pow(s_value,p7))));
00299   return R;
00300 } // End of CalcQF2IN_Ratio
00301 
00302 
00303 G4QHadronVector* G4QDiffractionRatio::TargFragment(G4int pPDG, G4LorentzVector p4M,
00304                                                    G4int tgZ, G4int tgN)
00305 {
00306   static const G4double pFm= 0.; // Fermi momentum in MeV (delta function)
00307   //static const G4double pFm= 250.; // Fermi momentum in MeV (delta function)
00308   static const G4double pFm2= pFm*pFm; // Squared Fermi momentum in MeV^2 (delta function)
00309   static const G4double mPi0= G4QPDGCode(111).GetMass(); // pi0 mass (MeV =min diffraction)
00310   //static const G4double mPi= G4QPDGCode(211).GetMass();  // pi+- mass (MeV)
00311   static const G4double mNeut= G4QPDGCode(2112).GetMass();
00312   static const G4double mNeut2=mNeut*mNeut;
00313   static const G4double dmNeut=mNeut+mNeut;
00314   static const G4double mProt= G4QPDGCode(2212).GetMass();
00315   static const G4double mProt2=mProt*mProt;
00316   static const G4double dmProt=mProt+mProt;
00317   static const G4double maxDM=mProt*12.;
00318   //static const G4double mLamb= G4QPDGCode(3122).GetMass();
00319   //static const G4double mSigZ= G4QPDGCode(3212).GetMass();
00320   //static const G4double mSigM= G4QPDGCode(3112).GetMass();
00321   //static const G4double mSigP= G4QPDGCode(3222).GetMass();
00322   //static const G4double eps=.003;
00323   static const G4double third=1./3.;
00324   //
00325   G4LorentzVector pr4M=p4M/megaelectronvolt;   // Convert 4-momenta in MeV (keep p4M)
00326   // prepare the DONOTHING answer
00327   G4QHadronVector* ResHV = new G4QHadronVector;// !! MUST BE DESTROYE/DDELETER by CALLER !!
00328   G4QHadron* hadron = new G4QHadron(pPDG,p4M); // Hadron for not scattered projectile
00329   ResHV->push_back(hadron);                // It must be cleaned up for real scattering sec
00330   // @@ diffraction is simulated as noncoherent (coherent is small)
00331   G4int tgA=tgZ+tgN;                       // A of the target
00332   G4int tPDG=90000000+tgZ*1000+tgN;        // PDG code of the targetNucleus/recoilNucleus
00333   G4double tgM=G4QPDGCode(tPDG).GetMass(); // Mass of the target nucleus
00334   G4int rPDG=2112;                         // prototype of PDG code of the recoiled nucleon
00335   if(tgA*G4UniformRand()>tgN)              // Substitute by a proton
00336   {
00337     rPDG=2212;                             // PDG code of the recoiled QF nucleon
00338     tPDG-=1000;                            // PDG code of the recoiled nucleus
00339   }
00340   else tPDG-=1;                            // PDG code of the recoiled nucleus
00341   G4double tM=G4QPDGCode(tPDG).GetMass();  // Mass of the recoiled nucleus
00342   G4double tE=std::sqrt(tM*tM+pFm2);       // Free energy of the recoil nucleus
00343   G4ThreeVector tP=pFm*G4RandomDirection();// 3-mom of the recoiled nucleus
00344   G4LorentzVector t4M(tP,tE);              // 4M of the recoil nucleus
00345   G4LorentzVector tg4M(0.,0.,0.,tgM);      // Full target 4-momentum
00346   G4LorentzVector N4M=tg4M-t4M;            // 4-mom of Quasi-free target nucleon
00347   G4LorentzVector tot4M=N4M+p4M;           // total momentum of quasi-free diffraction
00348   G4double mT=mNeut;                       // Prototype of mass of QF nucleon
00349   G4double mT2=mNeut2;                     // Squared mass of a free nucleon to be excited
00350   G4double dmT=dmNeut;                     // Doubled mass              
00351   //G4int Z=0;                               // Prototype of the isotope Z
00352   //G4int N=1;                               // Prototype of the Isotope N
00353   if(rPDG==2212)                           // Correct it, if this is a proton
00354   {
00355     mT=mProt;                              // Prototype of mass of QF nucleon to be excited
00356     mT2=mProt2;                            // Squared mass of the free nucleon
00357     dmT=dmProt;                            // Doubled mass              
00358     //Z=1;                                   // Z of the isotope
00359     //N=0;                                   // N of the Isotope
00360   }
00361   G4double mP2=pr4M.m2();                  // Squared mass of the projectile
00362   if(mP2<0.) mP2=0.;                       // Can be a problem for photon (m_min = 2*m_pi0)
00363   G4double s_value=tot4M.m2();             // @@ Check <0 ...
00364   G4double E=(s_value-mT2-mP2)/dmT;        // Effective interactionEnergy (virtNucl target)
00365   G4double E2=E*E;
00366   if(E<0. || E2<mP2)                       // Impossible to fragment: return projectile
00367   {
00368 #ifdef pdebug
00369     G4cerr<<"-Warning-G4DifR::TFra:<NegativeEnergy>E="<<E<<",E2="<<E2<<"<M2="<<mP2<<G4endl;
00370 #endif
00371     return ResHV;                          // *** Do Nothing Action ***
00372   }
00373   G4double mP=std::sqrt(mP2);              // Calculate mass of the projectile (to be exc.)
00374   if(mP<.1) mP=mPi0;                       // For photons minDiffraction is gam+P->P+Pi0
00375   //G4double dmP=mP+mP;                      // Doubled mass of the projectile
00376   G4double mMin=mP+mPi0;                   // Minimum diffractive mass
00377   G4double tA=tgA;                         // Real A of the target
00378   G4double sA=5./std::pow(tA,third);       // Mass-screaning
00379   //mMin+=mPi0+G4UniformRand()*(mP*sA+mPi0); // *Experimental*
00380   mMin+=G4UniformRand()*(mP*sA+mPi0);      // *Experimental*
00381   G4double ss=std::sqrt(s_value);          // CM compound mass (sqrt(s))
00382   G4double mMax=ss-mP;                     // Maximum diffraction mass of the projectile
00383   if(mMax>maxDM) mMax=maxDM;               // Restriction to avoid too big masses
00384   if(mMin>=mMax)
00385   {
00386 #ifdef pdebug
00387     G4cerr<<"-Warning-G4DifR::TFra:ZeroDiffractionMRange, mi="<<mMin<<",ma="<<mMax<<G4endl;
00388 #endif
00389     return ResHV;                          // Do Nothing Action
00390   }
00391   G4double R = G4UniformRand();
00392   G4double mDif=std::exp(R*std::log(mMax)+(1.-R)*std::log(mMin)); // Low Mass Approximation
00393   G4double mDif2=mDif*mDif;
00394   G4double ds=s_value-mP2-mDif2;               
00395   //G4double e=ds/dmP;
00396   //G4double P=std::sqrt(e*e-mDif2);      // Momentum in pseudo laboratory system
00397 #ifdef debug
00398   G4cout<<"G4QDiffR::TargFrag:Before XS, P="<<P<<",Z="<<Z<<",N="<<N<<",PDG="<<pPDG<<G4endl;
00399 #endif
00400   // @@ Temporary NN t-dependence for all hadrons
00401   if(pPDG>3400 || pPDG<-3400) G4cout<<"-Warning-G4QDifR::Fragment: pPDG="<<pPDG<<G4endl;
00402   G4double maxt=(ds*ds-4*mP2*mDif2)/s_value;  // maximum possible -t
00403   G4double tsl=140000.;                 // slope in MeV^2 
00404   G4double t=-std::log(G4UniformRand())*tsl;
00405 #ifdef pdebug
00406   G4cout<<"G4QDifR::TFra:ph="<<pPDG<<",P="<<P<<",t="<<t<<"<"<<maxt<<G4endl;
00407 #endif
00408 #ifdef nandebug
00409   if(mint>-.0000001);                   // To make the Warning for NAN
00410   else  G4cout<<"******G4QDiffractionRatio::TargFragment: -t="<<mint<<G4endl;
00411 #endif
00412   G4double rt=t/maxt;
00413   G4double cost=1.-rt-rt;               // cos(theta) in CMS
00414 #ifdef ppdebug
00415   G4cout<<"G4QDiffraRatio::TargFragment: -t="<<t<<", maxt="<<maxt<<", cost="<<cost<<G4endl;
00416 #endif
00417   if(cost>1. || cost<-1. || !(cost>-1. || cost<=1.))
00418   {
00419     if     (cost>1.)  cost=1.;
00420     else if(cost<-1.) cost=-1.;
00421     else
00422     {
00423       G4cerr<<"G4QDiffRat::TargFragm: *NAN* cost="<<cost<<",t="<<t<<",tmax="<<maxt<<G4endl;
00424       return ResHV;                     // Do Nothing Action
00425     }
00426   }
00427   G4LorentzVector r4M=G4LorentzVector(0.,0.,0.,mP);      // 4mom of the leading nucleon
00428   G4LorentzVector d4M=G4LorentzVector(0.,0.,0.,mDif);    // 4mom of the diffract. Quasmon
00429   G4LorentzVector dir4M=tot4M-G4LorentzVector(0.,0.,0.,(tot4M.e()-mT)*.01);
00430   if(!G4QHadron(tot4M).RelDecayIn2(r4M, d4M, dir4M, cost, cost))
00431   {
00432     G4cerr<<"G4QDifR::TFr:M="<<tot4M.m()<<",T="<<mT<<",D="<<mDif<<",T+D="<<mT+mDif<<G4endl;
00433     //G4Exception("G4QDifR::Fragm:","009",FatalException,"Decay of ElasticComp");
00434     return ResHV; // Do Nothing Action
00435   }
00436 #ifdef debug
00437   G4cout<<"G4QDifRat::TargFragm:d4M="<<d4M<<"+r4M="<<r4M<<"="<<d4M+r4M<<"="<<tot4M<<G4endl;
00438 #endif
00439   // Now everything is ready for fragmentation and DoNothing projHadron must be wiped out
00440   delete hadron;     // Delete the fake (doNothing) projectile hadron
00441   ResHV->pop_back(); // Clean up pointer to the fake (doNothing) projectile
00442   hadron = new G4QHadron(pPDG,r4M);     // Hadron for the recoil nucleon
00443   ResHV->push_back(hadron);             // Fill the recoil nucleon
00444 #ifdef debug
00445   G4cout<<"G4QDiffractionRatio::TargFragm: *Filled* LeadingNuc="<<r4M<<pPDG<<G4endl;
00446 #endif
00447   G4QHadronVector* leadhs = 0;   // Prototype of Quasmon Output G4QHadronVector  ---->---*
00448   G4QContent dQC=G4QPDGCode(rPDG).GetQuarkContent(); // QuarkContent of quasiFreeNucleon | 
00449   G4Quasmon* quasm = new G4Quasmon(dQC,d4M); // Quasmon=DiffractionExcitationQuasmon-*   |
00450 #ifdef debug
00451   G4cout<<"G4QDiffRatio::TgFrag:tPDG="<<tPDG<<",rPDG="<<rPDG<<",d4M="<<d4M<<G4endl;//|   |
00452 #endif
00453   G4QEnvironment* pan= new G4QEnvironment(G4QNucleus(tPDG));// --> DELETED --->---*  |   |
00454   pan->AddQuasmon(quasm);                    // Add diffractiveQuasmon to Environ.|  |   |
00455 #ifdef debug
00456   G4cout<<"G4QDiffractionRatio::TargFragment: EnvPDG="<<tPDG<<G4endl; //          |  |   |
00457 #endif
00458   try                                                           //                |  |   |
00459   {                                                             //                |  |   |
00460     leadhs = pan->Fragment();// DESTROYED in the end of the LOOP work space       |  | <-|
00461   }                                                             //                |  |   |
00462   catch (G4QException& error)//                                                   |  |   |
00463   {                                                             //                |  |   |
00464     //#ifdef pdebug
00465     G4cerr<<"***G4QDiffractionRatio::TargFrag: G4QException is catched"<<G4endl;//|  |   |
00466     //#endif
00467     //  G4Exception("G4QDiffractionRatio::TargFragm:","27",FatalException,"*Nucl");// |  |   |
00468     G4Exception("G4QDiffractionRatio::TargFragment()","HAD_CHPS_0027",
00469                 FatalException, "Nucl");
00470   }                                                             //                |  |   |
00471   delete pan;                              // Delete the Nuclear Environment <-<--*--*   |
00472   G4int qNH=leadhs->size();                // A#of collected hadrons from diff.frag.     |
00473   if(qNH) for(G4int iq=0; iq<qNH; iq++)    // Loop over hadrons to fill the result       |
00474   {                                        //                                            |
00475     G4QHadron* loh=(*leadhs)[iq];          // Pointer to the output hadron               |
00476     ResHV->push_back(loh);                 // Fill in the result                         |
00477   }                                        //                                            |
00478   leadhs->clear();//                                                                     |
00479   delete leadhs; // <----<----<----<----<----<----<----<----<----<----<----<----<----<---*
00480   return ResHV; // Result
00481 } // End of TargFragment
00482 
00483 
00484 G4QHadronVector* G4QDiffractionRatio::ProjFragment(G4int pPDG, G4LorentzVector p4M,
00485                                                   G4int tgZ, G4int tgN)
00486 {
00487   static const G4double pFm= 250.; // Fermi momentum in MeV (delta function)
00488   static const G4double pFm2= pFm*pFm; // Squared Fermi momentum in MeV^2 (delta function)
00489   static const G4double mPi0= G4QPDGCode(111).GetMass(); // pi0 mass (MeV =min diffraction)
00490   static const G4double mPi= G4QPDGCode(211).GetMass();  // pi+- mass (MeV)
00491   static const G4double mNeut= G4QPDGCode(2112).GetMass();
00492   static const G4double mNeut2=mNeut*mNeut;
00493   static const G4double dmNeut=mNeut+mNeut;
00494   static const G4double mProt= G4QPDGCode(2212).GetMass();
00495   static const G4double mProt2=mProt*mProt;
00496   static const G4double dmProt=mProt+mProt;
00497   static const G4double maxDM=mProt*12.;
00498   static const G4double mLamb= G4QPDGCode(3122).GetMass();
00499   static const G4double mSigZ= G4QPDGCode(3212).GetMass();
00500   static const G4double mSigM= G4QPDGCode(3112).GetMass();
00501   static const G4double mSigP= G4QPDGCode(3222).GetMass();
00502   static const G4double eps=.003;
00503   //
00504   G4LorentzVector pr4M=p4M/megaelectronvolt;   // Convert 4-momenta in MeV (keep p4M)
00505   // prepare the DONOTHING answer
00506   G4QHadronVector* ResHV = new G4QHadronVector;// !! MUST BE DESTROYE/DDELETER by CALLER !!
00507   G4QHadron* hadron = new G4QHadron(pPDG,p4M); // Hadron for not scattered projectile
00508   ResHV->push_back(hadron);                // It must be cleaned up for real scattering sec
00509   // @@ diffraction is simulated as noncoherent (coherent is small)
00510   G4int tgA=tgZ+tgN;                       // A of the target
00511   G4int tPDG=90000000+tgZ*1000+tgN;        // PDG code of the targetNucleus/recoilNucleus
00512   G4double tgM=G4QPDGCode(tPDG).GetMass(); // Mass of the target nucleus
00513   G4int rPDG=2112;                         // prototype of PDG code of the recoiled nucleon
00514   if(tgA*G4UniformRand()>tgN)              // Substitute by a proton
00515   {
00516     rPDG=2212;                             // PDG code of the recoiled QF nucleon
00517     tPDG-=1000;                            // PDG code of the recoiled nucleus
00518   }
00519   else tPDG-=1;                            // PDG code of the recoiled nucleus
00520   G4double tM=G4QPDGCode(tPDG).GetMass();  // Mass of the recoiled nucleus
00521   G4double tE=std::sqrt(tM*tM+pFm2);
00522   G4ThreeVector tP=pFm*G4RandomDirection();
00523   G4LorentzVector t4M(tP,tE);              // 4M of the recoil nucleus
00524   G4LorentzVector tg4M(0.,0.,0.,tgM);
00525   G4LorentzVector N4M=tg4M-t4M;            // Quasi-free target nucleon
00526   G4LorentzVector tot4M=N4M+p4M;           // total momentum of quasi-free diffraction
00527   G4double mT=mNeut;
00528   G4double mT2=mNeut2;                 // Squared mass of the free nucleon spectator
00529   G4double dmT=dmNeut;
00530   //G4int Z=0;
00531   //G4int N=1;
00532   if(rPDG==2212)
00533   {
00534     mT=mProt;
00535     mT2=mProt2;
00536     dmT=dmProt;
00537     //Z=1;
00538     //N=0;
00539   }
00540   G4double mP2=pr4M.m2();               // Squared mass of the projectile
00541   if(mP2<0.) mP2=0.;                    // A possible problem for photon (m_min = 2*m_pi0)
00542   G4double s_value=tot4M.m2();          // @@ Check <0 ...
00543   G4double E=(s_value-mT2-mP2)/dmT;     // Effective interactin energy (virt. nucl. target)
00544   G4double E2=E*E;
00545   if(E<0. || E2<mP2)
00546   {
00547 #ifdef pdebug
00548     G4cerr<<"-Warning-G4DifR::PFra:<NegativeEnergy>E="<<E<<",E2="<<E2<<"<M2="<<mP2<<G4endl;
00549 #endif
00550     return ResHV; // Do Nothing Action
00551   }
00552   G4double mP=std::sqrt(mP2);
00553   if(mP<.1)mP=mPi0;                      // For photons min diffraction is gamma+P->Pi0+Pi0
00554   G4double mMin=mP+mPi0;                 // Minimum diffractive mass
00555   G4double ss=std::sqrt(s_value);        // CM compound mass (sqrt(s))
00556   G4double mMax=ss-mT;                   // Maximum diffraction mass
00557   if(mMax>maxDM) mMax=maxDM;             // Restriction to avoid too big masses
00558   if(mMin>=mMax)
00559   {
00560 #ifdef pdebug
00561     G4cerr<<"-Warning-G4DifR::PFra:ZeroDiffractionMRange, mi="<<mMin<<",ma="<<mMax<<G4endl;
00562 #endif
00563     return ResHV; // Do Nothing Action
00564   }
00565   G4double R = G4UniformRand();
00566   G4double mDif=std::exp(R*std::log(mMax)+(1.-R)*std::log(mMin)); // LowMassApproximation
00567   G4double mDif2=mDif*mDif;
00568   G4double ds=s_value-mT2-mDif2;
00569   //G4double e=ds/dmT;
00570   //G4double P=std::sqrt(e*e-mDif2);          // Momentum in pseudo laboratory system
00571 #ifdef debug
00572   G4cout<<"G4QDiffR::PFra: Before XS, P="<<P<<", Z="<<Z<<", N="<<N<<", PDG="<<pPDG<<G4endl;
00573 #endif
00574   // @@ Temporary NN t-dependence for all hadrons
00575   if(pPDG>3400 || pPDG<-3400) G4cout<<"-Warning-G4QDifR::Fragment: pPDG="<<pPDG<<G4endl;
00576   G4double tsl=140000.;                        // slope in MeV^2 
00577   G4double t=-std::log(G4UniformRand())*tsl;
00578   G4double maxt=(ds*ds-4*mT2*mDif2)/s_value;   // maximum possible -t
00579 #ifdef pdebug
00580   G4cout<<"G4QDifR::PFra:ph="<<pPDG<<",P="<<P<<",t="<<mint<<"<"<<maxt<<G4endl;
00581 #endif
00582 #ifdef nandebug
00583   if(mint>-.0000001);                          // To make the Warning for NAN
00584   else  G4cout<<"******G4QDiffractionRatio::ProjFragment: -t="<<mint<<G4endl;
00585 #endif
00586   G4double rt=t/maxt;
00587   G4double cost=1.-rt-rt;                      // cos(theta) in CMS
00588 #ifdef ppdebug
00589   G4cout<<"G4QDiffRatio::ProjFragment: -t="<<t<<", maxt="<<maxt<<", cost="<<cost<<G4endl;
00590 #endif
00591   if(cost>1. || cost<-1. || !(cost>-1. || cost<=1.))
00592   {
00593     if     (cost>1.)  cost=1.;
00594     else if(cost<-1.) cost=-1.;
00595     else
00596     {
00597       G4cerr<<"G4QDiffRat::ProjFragm: *NAN* cost="<<cost<<",t="<<t<<",tmax="<<maxt<<G4endl;
00598       return ResHV; // Do Nothing Action
00599     }
00600   }
00601   G4LorentzVector r4M=G4LorentzVector(0.,0.,0.,mT);      // 4mom of the recoil nucleon
00602   G4LorentzVector d4M=G4LorentzVector(0.,0.,0.,mDif);    // 4mom of the diffract. Quasmon
00603   G4LorentzVector dir4M=tot4M-G4LorentzVector(0.,0.,0.,(tot4M.e()-mT)*.01);
00604   if(!G4QHadron(tot4M).RelDecayIn2(d4M, r4M, dir4M, cost, cost))
00605   {
00606     G4cerr<<"G4QDifR::PFr:M="<<tot4M.m()<<",T="<<mT<<",D="<<mDif<<",T+D="<<mT+mDif<<G4endl;
00607     //G4Exception("G4QDifR::Fragm:","009",FatalException,"Decay of ElasticComp");
00608     return ResHV; // Do Nothing Action
00609   }
00610 #ifdef debug
00611   G4cout<<"G4QDiffR::ProjFragm:d4M="<<d4M<<"+r4M="<<r4M<<"="<<d4M+r4M<<"="<<tot4M<<G4endl;
00612 #endif
00613   // Now everything is ready for fragmentation and DoNothing projHadron must be wiped out
00614   delete hadron;     // Delete the fake (doNothing) projectile hadron
00615   ResHV->pop_back(); // Clean up pointer to the fake (doNothing) projectile
00616   hadron = new G4QHadron(tPDG,t4M);  // Hadron for the recoil neucleus
00617   ResHV->push_back(hadron);          // Fill the recoil nucleus
00618 #ifdef debug
00619   G4cout<<"G4QDiffractionRatio::ProjFragment: *Filled* RecNucleus="<<t4M<<tPDG<<G4endl;
00620 #endif
00621   hadron = new G4QHadron(rPDG,r4M);  // Hadron for the recoil nucleon
00622   ResHV->push_back(hadron);          // Fill the recoil nucleon
00623 #ifdef debug
00624   G4cout<<"G4QDiffractionRatio::ProjFragment: *Filled* RecNucleon="<<r4M<<rPDG<<G4endl;
00625 #endif
00626   G4LorentzVector sum4M(0.,0.,0.,0.);
00627   // Now the (pPdg,d4M) Quasmon must be fragmented
00628   G4QHadronVector* leadhs = 0;       // Prototype of QuasmOutput G4QHadronVector
00629   G4QContent dQC=G4QPDGCode(pPDG).GetQuarkContent(); // Quark Content of the projectile
00630   G4Quasmon* pan= new G4Quasmon(dQC,d4M); // --->---->---->----->-----> DELETED -->---*
00631   try                                                           //                    |
00632   {                                                             //                    |
00633     G4QNucleus vac(90000000);                                   //                    |
00634     leadhs=pan->Fragment(vac,1);  // DELETED after it is copied to ResHV vector -->---+-*
00635   }                                                             //                    | |
00636   catch (G4QException& error)                                   //                    | |
00637   {                                                             //                    | |
00638     G4cerr<<"***G4QDiffractionRatio::ProjFragment: G4Quasmon Exception"<<G4endl;    //| |
00639     // G4Exception("G4QDiffractionRatio::ProjFragment","72",FatalException,"*Quasmon");//| |
00640     G4Exception("G4QDiffractionRatio::ProjFragment()", "HAD_CHPS_0072",
00641                 FatalException, "*Quasmon");
00642   }                                                             //                    | |
00643   delete pan;                              // Delete the Nuclear Environment <----<---* |
00644   G4int qNH=leadhs->size();                // A#of collected hadrons from diff.frag.    |
00645   if(qNH) for(G4int iq=0; iq<qNH; iq++)    // Loop over hadrons to fill the result      |
00646   {                                        //                                           |
00647     G4QHadron* loh=(*leadhs)[iq];          // Pointer to the output hadron              |
00648     G4int nL=loh->GetStrangeness();        // A number of Lambdas in the Hypernucleus   |
00649     G4int nB=loh->GetBaryonNumber();       // Total Baryon Number of the Hypernucleus   |
00650     G4int nC = loh->GetCharge();           // Charge of the Hypernucleus                |
00651     G4int oPDG = loh->GetPDGCode();        // Original CHIPS PDG Code of the hadron     |
00652     //if((nC>nB || nC<0) && nB>0 && nL>=0 && nL<=nB && oPDG>80000000) // Iso-nucleus    |
00653     if(2>3) // Closed because "G4QDR::F:90002999,M=-7.768507e-04,B=2,S=0,C=3" is found  |
00654     {
00655       G4LorentzVector q4M = loh->Get4Momentum(); // Get 4-momentum of the Isonucleus    |
00656       G4double qM=q4M.m();                 // Real mass of the Isonucleus
00657 #ifdef fdebug
00658       G4cout<<"G4QDR::PF:"<<oPDG<<",M="<<qM<<",B="<<nB<<",S="<<nL<<",C="<<nC<<G4endl;// |
00659 #endif
00660       G4int    qPN=nC-nB;                  // Number of pions in the Isonucleus         |
00661       G4int    fPDG = 2212;                // Prototype for nP+(Pi+) case               |
00662       G4int    sPDG = 211;
00663       tPDG = 3122;                         // @@ Sigma0 (?)                             |
00664       G4double fMass= mProt;
00665       G4double sMass= mPi;
00666       G4double tMass= mLamb;               // @@ Sigma0 (?)                             |
00667       G4bool   cont=true;                  // Continue flag                             |
00668       // =--------= Negative state =---------=
00669       if(nC<0)                             // =----= Only Pi- can help                  |
00670       {
00671         if(nL&&nB==nL)                     // --- n*Lamb + k*(Pi-) State ---            |
00672         {
00673           sPDG = -211;
00674           if(-nC==nL && nL==1)             // Only one Sigma- like (nB=1)               |
00675           {
00676             if(std::fabs(qM-mSigM)<eps)
00677             {
00678               loh->SetQPDG(G4QPDGCode(3112));  // This is Sigma-                        |
00679               cont=false;                  // Skip decay                                |
00680             }
00681             else if(qM>mLamb+mPi)          //(2) Sigma- => Lambda + Pi- decay           |
00682             {
00683               fPDG = 3122;
00684               fMass= mLamb;
00685             }
00686             else if(qM>mSigM)              //(2) Sigma+=>Sigma++gamma decay             |
00687             {
00688               fPDG = 3112;
00689               fMass= mSigM;
00690               sPDG = 22;
00691               sMass= 0.;
00692             }
00693             else                           //(2) Sigma-=>Neutron+Pi- decay              |
00694             {
00695               fPDG = 2112;
00696               fMass= mNeut;
00697             }
00698             qPN  = 1;                      // #of (Pi+ or gamma)'s = 1                  |
00699           }
00700           else if(-nC==nL)                 //(2) a few Sigma- like                      |
00701           {
00702             qPN  = 1;                      // One separated Sigma-                      |
00703             fPDG = 3112;
00704             sPDG = 3112;
00705             sMass= mSigM;
00706             nB--;
00707             fMass= mSigM;
00708           }
00709           else if(-nC>nL)                  //(2) n*(Sigma-)+m*(Pi-)                     |
00710           {
00711             qPN  = -nC-nL;                 // #of Pi-'s                                 |
00712             fPDG = 3112;
00713             fMass= mSigM;
00714           }
00715           else                             //(2) n*(Sigma-)+m*Lambda(-nC<nL)            |
00716           {
00717             nB += nC;                      // #of Lambda's                              |
00718             fPDG = 3122;
00719             fMass= mLamb;
00720             qPN  = -nC;                    // #of Sigma+'s                              |
00721             sPDG = 3112;
00722             sMass= mSigM;
00723           }
00724           nL   = 0;                        // Only decays in two are above              |
00725         }
00726         else if(nL)                        // ->n*Lamb+m*Neut+k*(Pi-) State (nL<nB)     |
00727         {
00728           nB -= nL;                        // #of neutrons                              |
00729           fPDG = 2112;
00730           fMass= mNeut;
00731           G4int nPin = -nC;                           // #of Pi-'s                    
00732           if(nL==nPin)                                //(2) m*Neut+n*Sigma-             |
00733           {
00734             qPN  = nL;                                // #of Sigma-                     |
00735             sPDG = 3112;
00736             sMass= mSigM;
00737             nL   = 0;
00738           }
00739           else if(nL>nPin)                            //(3) m*P+n*(Sigma+)+k*Lambda     |
00740           {
00741             nL-=nPin;                                 // #of Lambdas                    |
00742             qPN  = nPin;                              // #of Sigma+                     |
00743             sPDG = 3112;
00744             sMass= mSigM;
00745           }
00746           else                                 //(3) m*N+n*(Sigma-)+k*(Pi-) (nL<nPin)   |
00747           {
00748             qPN  = nPin-nL;                           // #of Pi-                        |
00749             sPDG = -211;
00750             tPDG = 3112;
00751             tMass= mSigM;
00752           }
00753         }
00754         else                                          //(2) n*N+m*(Pi-)   (nL=0)        |
00755         {
00756           sPDG = -211;
00757           qPN  = -nC;
00758           fPDG = 2112;
00759           fMass= mNeut;
00760         }
00761       }
00762       else if(!nC)                                   // *** Should not be here ***      |
00763       {
00764         if(nL && nL<nB)          //(2) n*Lamb+m*N ***Should not be here***              |
00765         {
00766           qPN  = nL;
00767           fPDG = 2112;                               // mN+nL case                      |
00768           sPDG = 3122;
00769           sMass= mLamb;
00770           nB -= nL;
00771           fMass= mNeut;
00772           nL   = 0;
00773         }
00774         else if(nL>1 && nB==nL)  //(2) m*Lamb(m>1) ***Should not be here***             |
00775         {
00776           qPN  = 1;
00777           fPDG = 3122;
00778           sPDG = 3122;
00779           sMass= mLamb;
00780           nB--;
00781           fMass= mLamb;
00782         }
00783         else if(!nL && nB>1)     //(2) n*Neut(n>1) ***Should not be here***             |
00784         {
00785           qPN  = 1;
00786           fPDG = 2112;
00787           sPDG = 2112;
00788           sMass= mNeut;
00789           nB--;
00790           fMass= mNeut;
00791         }
00792         else G4cout<<"*?*G4QDiffractionRatio::ProjFragment: (1) oPDG="<<oPDG<<G4endl;// |
00793       }
00794       else if(nC>0)              // n*Lamb+(m*P)+(k*Pi+)                                |
00795       {
00796         if(nL && nL+nC==nB)      //(2) n*Lamb+m*P ***Should not be here***              |
00797         {
00798           qPN  = nL;
00799           nL   = 0;
00800           fPDG = 2212;
00801           sPDG = 3122;
00802           sMass= mLamb;
00803           nB  = nC;
00804           fMass= mProt;
00805         }
00806         else if(nL  && nC<nB-nL) //(3)n*L+m*P+k*N ***Should not be here***              |
00807         {
00808           qPN  = nC;                                  // #of protons                    |
00809           fPDG = 2112;                                // mP+nL case                     |
00810           sPDG = 2212;
00811           sMass= mProt;
00812           nB -= nL+nC;                                // #of neutrons                   |
00813           fMass= mNeut;
00814         }
00815         else if(nL  && nB==nL)                        // ---> n*L+m*Pi+ State           |
00816         {
00817           if(nC==nL && nL==1)                         // Only one Sigma+ like State     |
00818           {
00819             if(std::fabs(qM-mSigP)<eps)
00820             {
00821               loh->SetQPDG(G4QPDGCode(3222));         // This is GS Sigma+              |
00822               cont=false;                  // Skip decay                                |
00823             }
00824             else if(qM>mLamb+mPi)                     //(2) Sigma+=>Lambda+Pi+ decay    |
00825             {
00826               fPDG = 3122;
00827               fMass= mLamb;
00828             }
00829             else if(qM>mNeut+mPi)                     //(2) Sigma+=>Neutron+Pi+ decay   |
00830             {
00831               fPDG = 2112;
00832               fMass= mNeut;
00833             }
00834             else if(qM>mSigP)                         //(2) Sigma+=>Sigma++gamma decay  |
00835             {
00836               fPDG = 3222;
00837               fMass= mSigP;
00838               sPDG = 22;
00839               sMass= 0.;
00840             }
00841             else                                      //(2) Sigma+=>Proton+gamma decay  |
00842             {
00843               fPDG = 2212;
00844               fMass= mProt;
00845               sPDG = 22;
00846               sMass= 0.;
00847             }
00848             qPN  = 1;                                 // #of (Pi+ or gamma)'s = 1       |
00849           }
00850           else if(nC==nL)                             //(2) a few Sigma+ like hyperons  |
00851           {
00852             qPN  = 1;
00853             fPDG = 3222;
00854             sPDG = 3222;
00855             sMass= mSigP;
00856             nB--;
00857             fMass= mSigP;
00858           }
00859           else if(nC>nL)                              //(2) n*(Sigma+)+m*(Pi+)          |
00860           {
00861             qPN  = nC-nL;                             // #of Pi+'s                      |
00862             fPDG = 3222;
00863             nB  = nL;                                 // #of Sigma+'s                   |
00864             fMass= mSigP;
00865           }
00866           else                                        //(2) n*(Sigma+)+m*Lambda         |
00867           {
00868             nB -= nC;                                 // #of Lambda's                   |
00869             fPDG = 3122;
00870             fMass= mLamb;
00871             qPN  = nC;                                // #of Sigma+'s                   |
00872             sPDG = 3222;
00873             sMass= mSigP;
00874           }
00875           nL   = 0;                                   // All above are decays in 2      |
00876         }
00877         else if(nL && nC>nB-nL)                       // n*Lamb+m*P+k*Pi+               |
00878         {
00879           nB -= nL;                                   // #of protons                    |
00880           G4int nPip = nC-nB;                         // #of Pi+'s                      |
00881           if(nL==nPip)                                //(2) m*P+n*Sigma+                |
00882           {
00883             qPN  = nL;                                // #of Sigma+                     |
00884             sPDG = 3222;
00885             sMass= mSigP;
00886             nL   = 0;
00887           }
00888           else if(nL>nPip)                            //(3) m*P+n*(Sigma+)+k*Lambda     |
00889           {
00890             nL  -= nPip;                              // #of Lambdas                    |
00891             qPN  = nPip;                              // #of Sigma+                     |
00892             sPDG = 3222;
00893             sMass= mSigP;
00894           }
00895           else                                        //(3) m*P+n*(Sigma+)+k*(Pi+)      |
00896           {
00897             qPN  = nPip-nL;                           // #of Pi+                        |
00898             tPDG = 3222;
00899             tMass= mSigP;
00900           }
00901         }
00902         if(nC<nB)                 //(2) n*P+m*N ***Should not be here***                |
00903         {
00904           fPDG = 2112;
00905           fMass= mNeut;
00906           qPN  = nC;
00907           sPDG = 2212;
00908           sMass= mProt;
00909         }
00910         else if(nB==nC && nC>1)   //(2) m*Prot(m>1) ***Should not be here***            |
00911         {
00912           qPN  = 1;
00913           fPDG = 2212;
00914           sPDG = 2212;
00915           sMass= mProt;
00916           nB--;
00917           fMass= mProt;
00918         }
00919         else if(nC<=nB||!nB) G4cout<<"*?*G4QDR::ProjFragm: (2) oPDG="<<oPDG<<G4endl; // |
00920         // !nL && nC>nB                             //(2) Default condition n*P+m*(Pi+) |
00921       }
00922       if(cont)                                      // Make a decay                     |
00923       {
00924         G4double tfM=nB*fMass;
00925         G4double tsM=qPN*sMass;
00926         G4double ttM=0.;
00927         if(nL) ttM=nL*tMass;
00928         G4LorentzVector f4Mom(0.,0.,0.,tfM);
00929         G4LorentzVector s4Mom(0.,0.,0.,tsM);
00930         G4LorentzVector t4Mom(0.,0.,0.,ttM);
00931         G4double sum=tfM+tsM+ttM;
00932         if(std::fabs(qM-sum)<eps)
00933         {
00934           f4Mom=q4M*(tfM/sum);
00935           s4Mom=q4M*(tsM/sum);
00936           if(nL) t4Mom=q4M*(ttM/sum);
00937         }
00938         else if(!nL && (qM<sum || !G4QHadron(q4M).DecayIn2(f4Mom, s4Mom))) // Error     |
00939         {
00940           //#ifdef fdebug
00941           G4cout<<"***G4QDR::PrFragm:fPDG="<<fPDG<<"*"<<nB<<"(fM="<<fMass<<")+sPDG="<<sPDG
00942                 <<"*"<<qPN<<"(sM="<<sMass<<")"<<"="<<sum<<" > TM="<<qM<<q4M<<oPDG<<G4endl;
00943           //#endif
00944           // throw G4QException("*G4QDiffractionRatio::ProjFragment: Bad decay in 2"); //  |
00945           G4ExceptionDescription ed;
00946           ed << "***G4QDR::PrFragm:fPDG=" << fPDG << "*" << nB << "(fM="
00947              << fMass << ")+sPDG=" << sPDG << "*" << qPN << "(sM=" << sMass
00948              << ")" << "=" << sum << " > TM=" << qM << q4M << oPDG << G4endl;
00949           G4Exception("G4QDiffractionRatio::ProjFragment()", "HAD_CHPS_0002",
00950                       FatalException, ed);
00951         }
00952         else if(nL && (qM<sum || !G4QHadron(q4M).DecayIn3(f4Mom, s4Mom, t4Mom)))// Error|
00953         {
00954           //#ifdef fdebug
00955           G4cout<<"***G4DF::PrFrag: "<<fPDG<<"*"<<nB<<"("<<fMass<<")+"<<sPDG<<"*"<<qPN<<"("
00956                 <<sMass<<")+Lamb*"<<nL<<"="<<sum<<" > TotM="<<qM<<q4M<<oPDG<<G4endl;
00957           //#endif
00958           // throw G4QException("*G4QDiffractionRatio::ProjFragment: Bad decay in 3"); //  |
00959           G4ExceptionDescription ed;
00960           ed << "***G4DF::PrFrag: " << fPDG << "*" << nB << "(" << fMass << ")+"
00961              << sPDG << "*" << qPN << "(" << sMass << ")+Lamb*" << nL << "="
00962              << sum << " > TotM=" << qM << q4M << oPDG << G4endl;
00963           G4Exception("G4QDiffractionRatio::ProjFragment()", "HAD_CHPS_0003",
00964                       FatalException, ed);
00965         }
00966 #ifdef fdebug
00967         G4cout<<"G4QDF::ProjFragm: *DONE* n="<<nB<<f4Mom<<fPDG<<", m="<<qPN<<s4Mom<<sPDG
00968               <<", l="<<nL<<t4Mom<<G4endl;
00969 #endif
00970         G4bool notused=true;
00971         if(nB)                               // There are baryons                       |
00972         {
00973           f4Mom/=nB;
00974           loh->Set4Momentum(f4Mom);          // ! Update the Hadron !                   |
00975           loh->SetQPDG(G4QPDGCode(fPDG));    // Baryons                                 |
00976           notused=false;                     // Loh was used                            |
00977           if(nB>1) for(G4int ih=1; ih<nB; ih++) // Loop over the rest of baryons        |
00978           {
00979             G4QHadron* Hi = new G4QHadron(fPDG,f4Mom); // Create a Hadron for Baryon    |
00980             ResHV->push_back(Hi);            // Fill in the additional nucleon          |
00981 #ifdef fdebug
00982             sum4M+=r4M;                      // Sum 4-momenta for the EnMom check       |
00983             G4cout<<"G4QDR::ProjFrag: *additional Nucleon*="<<f4Mom<<fPDG<<G4endl; //   |
00984 #endif
00985           }
00986         }
00987         if(qPN)                              // There are pions                         |
00988         {
00989           s4Mom/=qPN;
00990           G4int min=0;
00991           if(notused)
00992           {
00993             loh->Set4Momentum(s4Mom);        // ! Update the Hadron 4M !                |
00994             loh->SetQPDG(G4QPDGCode(sPDG));  // Update PDG                              |
00995             notused=false;                   // loh was used                            |
00996             min=1;                           // start value                             |
00997           }
00998           if(qPN>min) for(G4int ip=min; ip<qPN; ip++) // Loop over pions                |
00999           {
01000             G4QHadron* Hj = new G4QHadron(sPDG,s4Mom); // Create a Hadron for the meson |
01001             ResHV->push_back(Hj);            // Fill in the additional pion             |
01002 #ifdef fdebug
01003             sum4M+=r4M;                      // Sum 4-momenta for the EnMom check       |
01004             G4cout<<"G4QDR::ProjFragm: *additional Pion*="<<f4Mom<<fPDG<<G4endl; //     |
01005 #endif
01006           }
01007         }
01008         if(nL)                               // There are Hyperons                      |
01009         {
01010           t4Mom/=nL;
01011           G4int min=0;
01012           if(notused)
01013           {
01014             loh->Set4Momentum(t4Mom);      // ! Update the Hadron 4M !                  |
01015             loh->SetQPDG(G4QPDGCode(tPDG));// Update PDG                                |
01016             notused=false;                 // loh was used                              |
01017             min=1;                         //   
01018           }
01019           if(nL>min) for(G4int il=min; il<nL; il++) // Loop over Hyperons               |
01020           {
01021             G4QHadron* Hk = new G4QHadron(tPDG,t4Mom); // Create a Hadron for Lambda    |
01022             ResHV->push_back(Hk);          // Fill in the additional pion               |
01023 #ifdef fdebug
01024             sum4M+=r4M;                    // Sum 4-momenta for the EnMom check         |
01025             G4cout<<"G4QDR::ProjFragm: *additional Hyperon*="<<f4Mom<<fPDG<<G4endl; //  |
01026 #endif
01027           }
01028         }
01029       }                                    // --> End of decay                          |
01030     }                                      // -> End of Iso-nuclear treatment           |
01031     else if( (nL > 0 && nB > 1) || (nL < 0 && nB < -1) ) 
01032     {     // Hypernucleus is found                                                      |
01033       G4bool anti=false;                   // Default=Nucleus (true=antinucleus         |
01034       if(nB<0)                             // Anti-nucleus                              |
01035       {
01036         anti=true;                         // Flag of anti-hypernucleus                 |
01037         nB=-nB;                            // Reverse the baryon number                 |
01038         nC=-nC;                            // Reverse the charge                        |
01039         nL=-nL;                            // Reverse the strangeness                   |
01040       }
01041       G4int hPDG = 90000000+nL*999999+nC*999+nB; // CHIPS PDG Code for Hypernucleus     |
01042       G4int nSM=0;                         // A#0f unavoidable Sigma-                   |
01043       G4int nSP=0;                         // A#0f unavoidable Sigma+                   |
01044       if(nC<0)                             // Negative hypernucleus                     |
01045       {
01046         if(-nC<=nL)                        // Partial compensation by Sigma-            |
01047         {
01048           nSM=-nC;                         // Can be compensated by Sigma-              |
01049           nL+=nC;                          // Reduce the residual strangeness           |
01050         }
01051         else                               // All Charge is compensated by Sigma-       |
01052         {
01053           nSM=nL;                          // The maximum number of Sigma-              |
01054           nL=0;                            // Kill the residual strangeness             |
01055         }
01056       }
01057       else if(nC>nB-nL)                    // Extra positive hypernucleus               |
01058       {
01059         if(nC<=nB)                         // Partial compensation by Sigma+            |
01060         {
01061           G4int dH=nB-nC;                  // Isotopic shift                            |
01062           nSP=nL-dH;                       // Can be compensated by Sigma+              |
01063           nL=dH;                           // Reduce the residual strangeness           |
01064         }
01065         else                               // All Charge is compensated by Sigma+       |
01066         {
01067           nSP=nL;                          // The maximum number of Sigma+              |
01068           nL=0;                            // Kill the residual strangeness             |
01069         }
01070       }
01071       r4M=loh->Get4Momentum();                 // Real 4-momentum of the hypernucleus   !
01072       G4double reM=r4M.m();                    // Real mass of the hypernucleus         |
01073 #ifdef fdebug
01074       G4cout<<"G4QDiffRatio::PrFrag:oPDG=="<<oPDG<<",hPDG="<<hPDG<<",M="<<reM<<G4endl;//|
01075 #endif
01076       G4int rlPDG=hPDG-nL*1000000-nSP*1000999-nSM*999001;// Subtract Lamb/Sig from Nucl.|
01077       G4int    sPDG=3122;                      // Prototype for the Hyperon PDG (Lambda)|
01078       G4double MLa=mLamb;                      // Prototype for one Hyperon decay       |
01079 #ifdef fdebug
01080       G4cout<<"G4QDiffRatio::PrFrag:*G4*nS+="<<nSP<<",nS-="<<nSM<<",nL="<<nL<<G4endl;// |
01081 #endif
01082       if(nSP||nSM)                         // Sigma+/- improvement                      |
01083       {
01084         if(nL)                             // By mistake Lambda improvement is found    |
01085         {
01086           G4cout<<"***G4QDR::PFr:HypN="<<hPDG<<": bothSigm&Lamb -> ImproveIt"<<G4endl;//|
01087           //throw G4QException("*G4QDiffractionRatio::Fragment:BothLambda&SigmaInHN");//|
01088           // @@ Correction, which does not conserv the charge !! (-> add decay in 3)    |
01089           if(nSP) nL+=nSP;                 // Convert Sigma+ to Lambda                  |
01090           else    nL+=nSM;                 // Convert Sigma- to Lambda                  |
01091         }
01092         if(nSP)                            // Sibma+ should be decayed                  |
01093         {
01094           nL=nSP;                          // #of decaying hyperons                     |
01095           sPDG=3222;                       // PDG code of decaying hyperons             |
01096           MLa=mSigP;                       // Mass of decaying hyperons                 |
01097         }
01098         else                               // Sibma+ should be decayed                  |
01099         {
01100           nL=nSM;                          // #of decaying hyperons                     |
01101           sPDG=3112;                       // PDG code of decaying hyperons             |
01102           MLa=mSigM;                       // Mass of decaying hyperons                 |
01103         }
01104       }
01105 #ifdef fdebug
01106       G4cout<<"G4QDiffRat::ProjFrag:*G4*mS="<<MLa<<",sPDG="<<sPDG<<",nL="<<nL<<G4endl;//|
01107 #endif
01108       if(nL>1) MLa*=nL;                    // Total mass of the decaying hyperons       |
01109       G4double rlM=G4QNucleus(rlPDG).GetMZNS();// Mass of the NonstrangeNucleus         |
01110       if(!nSP&&!nSM&&nL==1&&reM>rlM+mSigZ&&G4UniformRand()>.5) // Conv Lambda->Sigma0   |
01111       {
01112         sPDG=3212;                         // PDG code of a decaying hyperon            |
01113         MLa=mSigZ;                         // Mass of the decaying hyperon              |
01114       }
01115       G4int rnPDG = hPDG-nL*999999;        // Convert Lambdas to neutrons (for convInN) |
01116       G4QNucleus rnN(rnPDG);               // New nonstrange nucleus                    |
01117       G4double rnM=rnN.GetMZNS();          // Mass of the new nonstrange nucleus        |
01118       // @@ In future take into account Iso-Hypernucleus (Add PI+,R & Pi-,R decays)     |
01119       if(rlPDG==90000000)                  // Multy Hyperon (HyperNuc of only hyperons) |
01120       {
01121         if(nL>1) r4M=r4M/nL;               // split the 4-mom for the MultyLambda       |
01122         for(G4int il=0; il<nL; il++)       // loop over Lambdas                         |
01123         {
01124           if(anti) sPDG=-sPDG;             // For anti-nucleus case                     |
01125           G4QHadron* theLam = new G4QHadron(sPDG,r4M); // Make NewHadr for the Hyperon  |
01126           ResHV->push_back(theLam);        // Fill in the Lambda                        |
01127 #ifdef fdebug
01128           sum4M+=r4M;                      // Sum 4-momenta for the EnMom check         |
01129           G4cout<<"G4QDR::ProjFrag: *additional Lambda*="<<r4M<<sPDG<<G4endl; //        |
01130 #endif
01131         }
01132       }
01133       else if(reM>rlM+MLa-eps)              // Lambda (or Sigma) can be split           |
01134       {
01135         G4LorentzVector n4M(0.,0.,0.,rlM);  // 4-mom of the residual nucleus            |
01136         G4LorentzVector h4M(0.,0.,0.,MLa);  // 4-mom of the Hyperon                     |
01137         G4double sum=rlM+MLa;               // Safety sum                               |
01138         if(std::fabs(reM-sum)<eps)          // At rest in CMS                           |
01139         {
01140           n4M=r4M*(rlM/sum);                // Split tot 4-mom for resNuc               |
01141           h4M=r4M*(MLa/sum);                // Split tot 4-mom for Hyperon              |
01142         }
01143         else if(reM<sum || !G4QHadron(r4M).DecayIn2(n4M,h4M)) // Error in decay         |
01144         {
01145           G4cerr<<"***G4QDF::PF:HypN,M="<<reM<<"<A+n*L="<<sum<<",d="<<sum-reM<<G4endl;//|
01146           // throw G4QException("***G4QDiffractionRatio::ProjFragment:HypernuclusDecay");//|
01147           G4Exception("G4QDiffractionRatio::ProjFragment()", "HAD_CHPS_0100",
01148                       FatalException, "Error in hypernuclus decay");
01149         }
01150 #ifdef fdebug
01151         G4cout<<"*G4QDR::PF:HypN="<<r4M<<"->A="<<rlPDG<<n4M<<",n*L="<<nL<<h4M<<G4endl;//|
01152 #endif
01153         loh->Set4Momentum(n4M);            // ! Update the Hadron !                     |
01154         if(anti && rlPDG==90000001) rlPDG=-2112; // Convert to anti-neutron             |
01155         if(anti && rlPDG==90001000) rlPDG=-2212; // Convert to anti-proton              |
01156         loh->SetQPDG(G4QPDGCode(rlPDG));   // ConvertedHypernucleus to nonstrange(@anti)|
01157         if(rlPDG==90000002)                // Additional action with loH changed to 2n  |
01158         {
01159           G4LorentzVector newLV=n4M/2.;    // Split 4-momentum                          |
01160           loh->Set4Momentum(newLV);        // Reupdate the hadron                       |
01161           if(anti) loh->SetQPDG(G4QPDGCode(-2112)); // Make anti-neutron PDG            |
01162           else loh->SetQPDG(G4QPDGCode(2112)); // Make neutron PDG                      |
01163           G4QHadron* secHadr = new G4QHadron(loh); // Duplicate the neutron             |
01164           ResHV->push_back(secHadr);       // Fill in the additional neutron            |
01165 #ifdef fdebug
01166           sum4M+=r4M;                      // Sum 4-momenta for the EnMom check         |
01167           G4cout<<"G4QDR::ProgFrag: *additional Neutron*="<<r4M<<sPDG<<G4endl; //       |
01168 #endif
01169         }
01170         else if(rlPDG==90002000)           // Additional action with loH change to 2p   |
01171         {
01172           G4LorentzVector newLV=n4M/2.;    // Split 4-momentum                          |
01173           loh->Set4Momentum(newLV);        // Reupdate the hadron                       |
01174           if(anti) loh->SetQPDG(G4QPDGCode(-2212)); // Make anti-neutron PDG            |
01175           else loh->SetQPDG(G4QPDGCode(2112)); // Make neutron PDG                      |
01176           G4QHadron* secHadr = new G4QHadron(loh); // Duplicate the proton              |
01177           ResHV->push_back(secHadr);       // Fill in the additional neutron            |
01178 #ifdef fdebug
01179           sum4M+=r4M;                      // Sum 4-momenta for the EnMom check         |
01180           G4cout<<"G4QDR::ProjFrag: *additional Proton*="<<r4M<<sPDG<<G4endl; //        |
01181 #endif
01182         }
01183         // @@(?) Add multybaryon decays if necessary (Now it anyhow is made later)      |
01184 #ifdef fdebug
01185         G4cout<<"*G4QDiffractionRatio::PrFrag:resNucPDG="<<loh->GetPDGCode()<<G4endl;// |
01186 #endif
01187         if(nL>1) h4M=h4M/nL;               // split the lambda's 4-mom if necessary     |
01188         for(G4int il=0; il<nL; il++)       // A loop over excessive hyperons            |
01189         {
01190           if(anti) sPDG=-sPDG;             // For anti-nucleus case                     |
01191           G4QHadron* theLamb = new G4QHadron(sPDG,h4M); // Make NewHadr for the Hyperon |
01192           ResHV->push_back(theLamb);       // Fill in the additional neutron            |
01193 #ifdef fdebug
01194           sum4M+=r4M;                      // Sum 4-momenta for the EnMom check         |
01195           G4cout<<"G4QDR::ProjFrag: *additional Hyperon*="<<r4M<<sPDG<<G4endl; //       |
01196 #endif
01197         }
01198       }
01199       else if(reM>rnM+mPi0-eps&&!nSP&&!nSM)// Lambda->N only if Sigmas are absent       |
01200       {
01201         G4int nPi=static_cast<G4int>((reM-rnM)/mPi0); // Calc. pion multiplicity        |
01202         if (nPi>nL) nPi=nL;                // Cut the pion multiplicity                 |
01203         G4double npiM=nPi*mPi0;            // Total pion mass                           |
01204         G4LorentzVector n4M(0.,0.,0.,rnM); // Residual nucleus 4-momentum               |
01205         G4LorentzVector h4M(0.,0.,0.,npiM);// 4-momentum of pions                       |
01206         G4double sum=rnM+npiM;             // Safety sum                                |
01207         if(std::fabs(reM-sum)<eps)         // At rest                                   |
01208         {
01209           n4M=r4M*(rnM/sum);               // The residual nucleus part                 |
01210           h4M=r4M*(npiM/sum);              // The pion part                             |
01211         }
01212         else if(reM<sum || !G4QHadron(r4M).DecayIn2(n4M,h4M)) // Error in decay         |
01213         {
01214           G4cerr<<"*G4QDR::PF:HypN,M="<<reM<<"<A+n*Pi0="<<sum<<",d="<<sum-reM<<G4endl;//|
01215           // throw G4QException("***G4QDiffractionRatio::ProjFragment:HypernuclDecay"); // |
01216           G4Exception("G4QDiffractionRatio::ProjFragment()", "HAD_CHPS_0101",
01217                        FatalException, "Error in HypernuclDecay"); 
01218         }
01219         loh->Set4Momentum(n4M);            // ! Update the Hadron !                     |
01220         if(anti && rnPDG==90000001) rnPDG=-2112; // Convert to anti-neutron             |
01221         if(anti && rnPDG==90001000) rnPDG=-2212; // Convert to anti-proton              |
01222         loh->SetQPDG(G4QPDGCode(rnPDG));   // convert hyperNuc to nonstrangeNuc(@@anti) |
01223 #ifdef fdebug
01224         G4cout<<"*G4QDR::PF:R="<<r4M<<"->A="<<rnPDG<<n4M<<",n*Pi0="<<nPi<<h4M<<G4endl;//|
01225 #endif
01226         if(nPi>1) h4M=h4M/nPi;             // Split the 4-mom if necessary              |
01227         for(G4int ihn=0; ihn<nPi; ihn++)   // A loop over additional pions              |
01228         {
01229           G4QHadron* thePion = new G4QHadron(111,h4M); // Make a New Hadr for the pi0   |
01230           ResHV->push_back(thePion);       // Fill in the Pion                          |
01231 #ifdef fdebug
01232           sum4M+=r4M;                      // Sum 4-momenta for the EnMom check         |
01233           G4cout<<"G4QDR::ProjFrag: *additional Pion*="<<r4M<<sPDG<<G4endl; //          |
01234 #endif
01235         }
01236         if(rnPDG==90000002)                // Additional action with loH change to 2n   |
01237         {
01238           G4LorentzVector newLV=n4M/2.;    // Split 4-momentum                          |
01239           loh->Set4Momentum(newLV);        // Reupdate the hadron                       |
01240           if(anti) loh->SetQPDG(G4QPDGCode(-2112)); // Make anti-neutron PDG            |
01241           else loh->SetQPDG(G4QPDGCode(2112)); // Make neutron PDG                      |
01242           G4QHadron* secHadr = new G4QHadron(loh); // Duplicate the neutron             |
01243           ResHV->push_back(secHadr);       // Fill in the additional neutron            |
01244 #ifdef fdebug
01245           sum4M+=r4M;                      // Sum 4-momenta for the EnMom check         |
01246           G4cout<<"G4QDR::ProjFrag: *additional Neutron*="<<r4M<<sPDG<<G4endl; //       |
01247 #endif
01248         }
01249         else if(rnPDG==90002000)           // Additional action with loH change to 2p   |
01250         {
01251           G4LorentzVector newLV=n4M/2.;    // Split 4-momentum                          |
01252           loh->Set4Momentum(newLV);        // Reupdate the hadron                       |
01253           if(anti) loh->SetQPDG(G4QPDGCode(-2212)); // Make anti-neutron PDG            |
01254           else loh->SetQPDG(G4QPDGCode(2112)); // Make neutron PDG                      |
01255           G4QHadron* secHadr = new G4QHadron(loh); // Duplicate the proton              |
01256           ResHV->push_back(secHadr);       // Fill in the additional neutron            |
01257 #ifdef fdebug
01258           sum4M+=r4M;                      // Sum 4-momenta for the EnMom check         |
01259           G4cout<<"G4QDR::ProjFrag: *additional Proton*="<<r4M<<sPDG<<G4endl; //        |
01260 #endif
01261         }
01262         // @@ Add multybaryon decays if necessary                                       |
01263       }
01264       else // If this Excepton shows up (lowProbable appearance) => include gamma decay |
01265       {
01266         G4double d=rlM+MLa-reM;            // Hyperon Excessive energy                  |
01267         G4cerr<<"G4QDR::PF:R="<<rlM<<",S+="<<nSP<<",S-="<<nSM<<",L="<<nL<<",d="<<d<<G4endl;
01268         d=rnM+mPi0-reM;                    // Pion Excessive energy                     |
01269         G4cerr<<"G4QDR::PF:"<<oPDG<<","<<hPDG<<",M="<<reM<<"<"<<rnM+mPi0<<",d="<<d<<G4endl;
01270         // throw G4QException("G4QDiffractionRatio::ProjFragment: Hypernuclear conver");// |
01271         G4Exception("G4QDiffractionRatio::ProjFragment()", "HAD_CHPS_0102",
01272                     FatalException, "Excessive hypernuclear energy");
01273       }
01274     }                                      // => End of G4 Hypernuclear decay           |
01275     ResHV->push_back(loh);                 // Fill in the result                        |
01276 #ifdef debug
01277     sum4M+=loh->Get4Momentum();            // Sum 4-momenta for the EnMom check         |
01278     G4cout<<"G4QDR::PrFra:#"<<iq<<","<<loh->Get4Momentum()<<loh->GetPDGCode()<<G4endl;//|
01279 #endif
01280   }                                        //                                           |
01281   leadhs->clear();//                                                                    |
01282   delete leadhs; // <----<----<----<----<----<----<----<----<----<----<----<----<----<--*
01283 #ifdef debug
01284   G4cout<<"G4QDiffractionRatio::ProjFragment: *End* Sum="<<sum4M<<" =?= d4M="<<d4M<<G4endl;
01285 #endif
01286   return ResHV; // Result
01287 } // End of ProjFragment
01288 
01289 // Calculates Single Diffraction Taarget Excitation Cross-Section (independent Units)
01290 G4double G4QDiffractionRatio::GetTargSingDiffXS(G4double pIU, G4int pPDG, G4int Z, G4int N)
01291 {
01292   G4double mom=pIU/gigaelectronvolt;    // Projectile momentum in GeV
01293   if ( mom < 1. || (pPDG != 2212 && pPDG != 2112) )
01294     G4cerr<<"G4QDiffractionRatio::GetTargSingDiffXS isn't applicable p="<<mom<<" GeV, PDG="
01295          <<pPDG<<G4endl;
01296   G4double A=Z+N;                        // A of the target
01297   //return 4.5*std::pow(A,.364)*millibarn; // Result
01298   return 3.7*std::pow(A,.364)*millibarn; // Result after mpi0 correction
01299 
01300 } // End of ProjFragment

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