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26 // $Id: G4NuElNucleusNcModel.cc 91806 2015-08-
27 //
28 // Geant4 Header : G4NuElNucleusNcModel
29 //
30 // Author : V.Grichine 12.2.19
31 //
32
33 #include "G4NuElNucleusNcModel.hh"
34 #include "G4NeutrinoNucleusModel.hh"
35
36 // #include "G4NuMuResQX.hh"
37
38 #include "G4SystemOfUnits.hh"
39 #include "G4ParticleTable.hh"
40 #include "G4ParticleDefinition.hh"
41 #include "G4IonTable.hh"
42 #include "Randomize.hh"
43 #include "G4RandomDirection.hh"
44
45 // #include "G4Integrator.hh"
46 #include "G4DataVector.hh"
47 #include "G4PhysicsTable.hh"
48 #include "G4KineticTrack.hh"
49 #include "G4DecayKineticTracks.hh"
50 #include "G4KineticTrackVector.hh"
51 #include "G4Fragment.hh"
52 #include "G4ReactionProductVector.hh"
53
54
55 #include "G4NeutrinoE.hh"
56 // #include "G4AntiNeutrinoMu.hh"
57 #include "G4Nucleus.hh"
58 #include "G4LorentzVector.hh"
59
60 using namespace std;
61 using namespace CLHEP;
62
63 #ifdef G4MULTITHREADED
64 G4Mutex G4NuElNucleusNcModel::numuNucleusM
65 #endif
66
67
68 G4NuElNucleusNcModel::G4NuElNucleusNcModel(con
69 : G4NeutrinoNucleusModel(name)
70 {
71 SetMinEnergy( 0.0*GeV );
72 SetMaxEnergy( 100.*TeV );
73 SetMinEnergy(1.e-6*eV);
74
75 theNuE = G4NeutrinoE::NeutrinoE();
76
77 fMnumu = 0.;
78 fData = fMaster = false;
79 InitialiseModel();
80
81 }
82
83
84 G4NuElNucleusNcModel::~G4NuElNucleusNcModel()
85 {}
86
87
88 void G4NuElNucleusNcModel::ModelDescription(st
89 {
90
91 outFile << "G4NuElNucleusNcModel is a neut
92 << "model which uses the standard
93 << "transfer parameterization. Th
94
95 }
96
97 //////////////////////////////////////////////
98 //
99 // Read data from G4PARTICLEXSDATA (locally PA
100
101 void G4NuElNucleusNcModel::InitialiseModel()
102 {
103 G4String pName = "nu_e";
104
105 G4int nSize(0), i(0), j(0), k(0);
106
107 if(!fData)
108 {
109 #ifdef G4MULTITHREADED
110 G4MUTEXLOCK(&numuNucleusModel);
111 if(!fData)
112 {
113 #endif
114 fMaster = true;
115 #ifdef G4MULTITHREADED
116 }
117 G4MUTEXUNLOCK(&numuNucleusModel);
118 #endif
119 }
120
121 if(fMaster)
122 {
123 const char* path = G4FindDataDir("G4PARTIC
124 std::ostringstream ost1, ost2, ost3, ost4;
125 ost1 << path << "/" << "neutrino" << "/" <
126
127 std::ifstream filein1( ost1.str().c_str()
128
129 // filein.open("$PARTICLEXSDATA/");
130
131 filein1>>nSize;
132
133 for( k = 0; k < fNbin; ++k )
134 {
135 for( i = 0; i <= fNbin; ++i )
136 {
137 filein1 >> fNuMuXarrayKR[k][i];
138 // G4cout<< fNuMuXarrayKR[k][i] << "
139 }
140 }
141 // G4cout<<G4endl<<G4endl;
142
143 ost2 << path << "/" << "neutrino" << "/" <
144 std::ifstream filein2( ost2.str().c_str()
145
146 filein2>>nSize;
147
148 for( k = 0; k < fNbin; ++k )
149 {
150 for( i = 0; i < fNbin; ++i )
151 {
152 filein2 >> fNuMuXdistrKR[k][i];
153 // G4cout<< fNuMuXdistrKR[k][i] << "
154 }
155 }
156 // G4cout<<G4endl<<G4endl;
157
158 ost3 << path << "/" << "neutrino" << "/" <
159 std::ifstream filein3( ost3.str().c_str()
160
161 filein3>>nSize;
162
163 for( k = 0; k < fNbin; ++k )
164 {
165 for( i = 0; i <= fNbin; ++i )
166 {
167 for( j = 0; j <= fNbin; ++j )
168 {
169 filein3 >> fNuMuQarrayKR[k][i][j];
170 // G4cout<< fNuMuQarrayKR[k][i][j] <
171 }
172 }
173 }
174 // G4cout<<G4endl<<G4endl;
175
176 ost4 << path << "/" << "neutrino" << "/" <
177 std::ifstream filein4( ost4.str().c_str()
178
179 filein4>>nSize;
180
181 for( k = 0; k < fNbin; ++k )
182 {
183 for( i = 0; i <= fNbin; ++i )
184 {
185 for( j = 0; j < fNbin; ++j )
186 {
187 filein4 >> fNuMuQdistrKR[k][i][j];
188 // G4cout<< fNuMuQdistrKR[k][i][j] <
189 }
190 }
191 }
192 fData = true;
193 }
194 }
195
196 //////////////////////////////////////////////
197
198 G4bool G4NuElNucleusNcModel::IsApplicable(cons
199 G4Nucleus & )
200 {
201 G4bool result = false;
202 G4String pName = aPart.GetDefinition()->GetP
203 G4double energy = aPart.GetTotalEnergy();
204 fMinNuEnergy = GetMinNuElEnergy();
205
206 if( pName == "nu_e"
207 &&
208 energy > fMinNuEnergy
209 {
210 result = true;
211 }
212
213 return result;
214 }
215
216 /////////////////////////////////////////// Cl
217 //
218 //
219
220 G4HadFinalState* G4NuElNucleusNcModel::ApplyYo
221 const G4HadProjectile& aTrack, G4Nucleus&
222 {
223 theParticleChange.Clear();
224 fProton = f2p2h = fBreak = false;
225 const G4HadProjectile* aParticle = &aTrack;
226 G4double energy = aParticle->GetTotalEnergy(
227
228 G4String pName = aParticle->GetDefinition()
229
230 if( energy < fMinNuEnergy )
231 {
232 theParticleChange.SetEnergyChange(energy);
233 theParticleChange.SetMomentumChange(aTrack
234 return &theParticleChange;
235 }
236 SampleLVkr( aTrack, targetNucleus);
237
238 if( fBreak == true || fEmu < fMnumu ) // ~5*
239 {
240 // G4cout<<"ni, ";
241 theParticleChange.SetEnergyChange(energy);
242 theParticleChange.SetMomentumChange(aTrack
243 return &theParticleChange;
244 }
245
246 // LVs of initial state
247
248 G4LorentzVector lvp1 = aParticle->Get4Moment
249 G4LorentzVector lvt1( 0., 0., 0., fM1 );
250 G4double mPip = G4ParticleTable::GetParticle
251
252 // 1-pi by fQtransfer && nu-energy
253 G4LorentzVector lvpip1( 0., 0., 0., mPip );
254 G4LorentzVector lvsum, lv2, lvX;
255 G4ThreeVector eP;
256 G4double cost(1.), sint(0.), phi(0.), muMom(
257 G4DynamicParticle* aLept = nullptr; // lepto
258
259 G4int Z = targetNucleus.GetZ_asInt();
260 G4int A = targetNucleus.GetA_asInt();
261 G4double mTarg = targetNucleus.AtomicMass(A
262 G4int pdgP(0), qB(0);
263 // G4double mSum = G4ParticleTable::GetParti
264
265 G4int iPi = GetOnePionIndex(energy);
266 G4double p1pi = GetNuMuOnePionProb( iPi, ene
267
268 if( p1pi > G4UniformRand() && fCosTheta > 0.
269 {
270 // lvsum = lvp1 + lvpip1;
271 lvsum = lvp1 + lvt1;
272 // cost = fCosThetaPi;
273 cost = fCosTheta;
274 sint = std::sqrt( (1.0 - cost)*(1.0 + cost
275 phi = G4UniformRand()*CLHEP::twopi;
276 eP = G4ThreeVector( sint*std::cos(phi),
277
278 // muMom = sqrt(fEmuPi*fEmuPi-fMnumu*fMnum
279 muMom = sqrt(fEmu*fEmu-fMnumu*fMnumu);
280
281 eP *= muMom;
282
283 // lv2 = G4LorentzVector( eP, fEmuPi );
284 lv2 = G4LorentzVector( eP, fEmu );
285 lv2 = fLVl;
286
287 lvX = lvsum - lv2;
288 lvX = fLVh;
289 massX2 = lvX.m2();
290 G4double massX = lvX.m();
291 G4double massR = fLVt.m();
292
293 // if ( massX2 <= 0. ) // vmg: very rarely
294 if ( massX2 <= fM1*fM1 ) // 9-3-20 vmg: ve
295 if ( lvX.e() <= fM1 ) // 9-3-20 vmg: ver
296 {
297 theParticleChange.SetEnergyChange(energy
298 theParticleChange.SetMomentumChange(aTra
299 return &theParticleChange;
300 }
301 fW2 = massX2;
302
303 if( pName == "nu_e" ) aLept = new
304 // else if( pName == "anti_nu_mu") aLept =
305 else
306 {
307 theParticleChange.SetEnergyChange(energy
308 theParticleChange.SetMomentumChange(aTra
309 return &theParticleChange;
310 }
311
312 pdgP = 111;
313
314 G4double eCut; // = fMpi + 0.5*(fMpi*fMpi
315
316 if( A > 1 )
317 {
318 eCut = (fMpi + mTarg)*(fMpi + mTarg) - (
319 eCut /= 2.*massR;
320 eCut += massX;
321 }
322 else eCut = fM1 + fMpi;
323
324 if ( lvX.e() > eCut ) // && sqrt( GetW2()
325 {
326 CoherentPion( lvX, pdgP, targetNucleus);
327 }
328 else
329 {
330 theParticleChange.SetEnergyChange(energy
331 theParticleChange.SetMomentumChange(aTra
332 return &theParticleChange;
333 }
334 theParticleChange.AddSecondary( aLept, fSe
335
336 return &theParticleChange;
337 }
338 else // lepton part in lab
339 {
340 lvsum = lvp1 + lvt1;
341 cost = fCosTheta;
342 sint = std::sqrt( (1.0 - cost)*(1.0 + cost
343 phi = G4UniformRand()*CLHEP::twopi;
344 eP = G4ThreeVector( sint*std::cos(phi),
345
346 muMom = sqrt(fEmu*fEmu-fMnumu*fMnumu);
347
348 eP *= muMom;
349
350 lv2 = G4LorentzVector( eP, fEmu );
351
352 lvX = lvsum - lv2;
353
354 massX2 = lvX.m2();
355
356 if ( massX2 <= 0. ) // vmg: very rarely ~
357 {
358 theParticleChange.SetEnergyChange(energy
359 theParticleChange.SetMomentumChange(aTra
360 return &theParticleChange;
361 }
362 fW2 = massX2;
363
364 aLept = new G4DynamicParticle( theNuE, lv2
365
366 theParticleChange.AddSecondary( aLept, fSe
367 }
368
369 // hadron part
370
371 fRecoil = nullptr;
372 fCascade = false;
373 fString = false;
374
375 if( A == 1 )
376 {
377 qB = 1;
378
379 // if( G4UniformRand() > 0.1 ) // > 0.999
380 {
381 ClusterDecay( lvX, qB );
382 }
383 return &theParticleChange;
384 }
385 G4Nucleus recoil;
386 G4double rM(0.), ratio = G4double(Z)/G4doubl
387
388 if( ratio > G4UniformRand() ) // proton is e
389 {
390 fProton = true;
391 recoil = G4Nucleus(A-1,Z-1);
392 fRecoil = &recoil;
393 rM = recoil.AtomicMass(A-1,Z-1);
394
395 fMt = G4ParticleTable::GetParticleTable()-
396 + G4ParticleTable::GetParticleTable(
397 }
398 else // excited neutron
399 {
400 fProton = false;
401 recoil = G4Nucleus(A-1,Z);
402 fRecoil = &recoil;
403 rM = recoil.AtomicMass(A-1,Z);
404
405 fMt = G4ParticleTable::GetParticleTable()-
406 + G4ParticleTable::GetParticleTable(
407 }
408 // G4int index = GetEnergyIndex(energy
409 G4int nepdg = aParticle->GetDefinition()->Ge
410 G4double qeTotRat; // = GetNuMuQeTotRat(inde
411 qeTotRat = CalculateQEratioA( Z, A, energy,
412
413 G4ThreeVector dX = (lvX.vect()).unit();
414 G4double eX = lvX.e(); // excited nucleon
415 G4double mX = sqrt(massX2);
416
417 if( qeTotRat > G4UniformRand() || mX <= fMt
418 {
419 fString = false;
420
421 if( fProton )
422 {
423 fPDGencoding = 2212;
424 fMr = proton_mass_c2;
425 recoil = G4Nucleus(A-1,Z-1);
426 fRecoil = &recoil;
427 rM = recoil.AtomicMass(A-1,Z-1);
428 }
429 else
430 {
431 fPDGencoding = 2112;
432 fMr = G4ParticleTable::GetParticleTabl
433 FindParticle(fPDGencoding)->GetPDGMass(); //
434 recoil = G4Nucleus(A-1,Z);
435 fRecoil = &recoil;
436 rM = recoil.AtomicMass(A-1,Z);
437 }
438 G4double eTh = fMr+0.5*(fMr*fMr-mX*mX)/rM;
439
440 if(eX <= eTh) // vmg, very rarely out of k
441 {
442 theParticleChange.SetEnergyChange(energy
443 theParticleChange.SetMomentumChange(aTra
444 return &theParticleChange;
445 }
446 FinalBarion( lvX, 0, fPDGencoding ); // p(
447 }
448 else // if ( eX < 9500000.*GeV ) // < 25.*Ge
449 {
450 if ( fProton && pName == "nu_e" )
451 else if( !fProton && pName == "nu_e" )
452
453 ClusterDecay( lvX, qB );
454 }
455 return &theParticleChange;
456 }
457
458
459 //////////////////////////////////////////////
460 //////////////////////////////////////////////
461 //////////////////////////////////////////////
462
463 //////////////////////////////////////////////
464 //
465 // sample x, then Q2
466
467 void G4NuElNucleusNcModel::SampleLVkr(const G4
468 {
469 fBreak = false;
470 G4int A = targetNucleus.GetA_asInt(), iTer(0
471 G4int Z = targetNucleus.GetZ_asInt();
472 G4double e3(0.), pMu2(0.), pX2(0.), nMom(0.)
473 G4double cost(1.), sint(0.), phi(0.), muMom(
474 G4ThreeVector eP, bst;
475 const G4HadProjectile* aParticle = &aTrack;
476 G4LorentzVector lvp1 = aParticle->Get4Moment
477 nMom = NucleonMomentum( targetNucleus );
478
479 if( A == 1 || nMom == 0. ) // hydrogen, no F
480 {
481 fNuEnergy = aParticle->GetTotalEnergy();
482 iTer = 0;
483
484 do
485 {
486 fXsample = SampleXkr(fNuEnergy);
487 fQtransfer = SampleQkr(fNuEnergy, fXsamp
488 fQ2 = fQtransfer*fQtransfer;
489
490 if( fXsample > 0. )
491 {
492 fW2 = fM1*fM1 - fQ2 + fQ2/fXsample; //
493 fEmu = fNuEnergy - fQ2/2./fM1/fXsample
494 }
495 else
496 {
497 fW2 = fM1*fM1;
498 fEmu = fNuEnergy;
499 }
500 e3 = fNuEnergy + fM1 - fEmu;
501
502 // if( e3 < sqrt(fW2) ) G4cout<<"energy
503
504 pMu2 = fEmu*fEmu - fMnumu*fMnumu;
505 pX2 = e3*e3 - fW2;
506
507 fCosTheta = fNuEnergy*fNuEnergy + pMu2
508 fCosTheta /= 2.*fNuEnergy*sqrt(pMu2);
509 iTer++;
510 }
511 while( ( abs(fCosTheta) > 1. || fEmu < fMn
512
513 if( iTer >= iTerMax ) { fBreak = true; ret
514
515 if( abs(fCosTheta) > 1.) // vmg: due to bi
516 {
517 G4cout<<"H2: fCosTheta = "<<fCosTheta<<"
518 // fCosTheta = -1. + 2.*G4UniformRand();
519 if(fCosTheta < -1.) fCosTheta = -1.;
520 if(fCosTheta > 1.) fCosTheta = 1.;
521 }
522 // LVs
523
524 G4LorentzVector lvt1 = G4LorentzVector( 0
525 G4LorentzVector lvsum = lvp1 + lvt1;
526
527 cost = fCosTheta;
528 sint = std::sqrt( (1.0 - cost)*(1.0 + cost
529 phi = G4UniformRand()*CLHEP::twopi;
530 eP = G4ThreeVector( sint*std::cos(phi),
531 muMom = sqrt(fEmu*fEmu-fMnumu*fMnumu);
532 eP *= muMom;
533 fLVl = G4LorentzVector( eP, fEmu );
534
535 fLVh = lvsum - fLVl;
536 fLVt = G4LorentzVector( 0., 0., 0., 0. );
537 }
538 else // Fermi motion, Q2 in nucleon rest fra
539 {
540 G4ThreeVector nMomDir = nMom*G4RandomDirec
541
542 if( !f2p2h ) // 1p1h
543 {
544 G4Nucleus recoil(A-1,Z);
545 rM = sqrt( recoil.AtomicMass(A-1,Z)*reco
546 hM = tM - rM;
547
548 fLVt = G4LorentzVector( nMomDir, sqrt( r
549 fLVh = G4LorentzVector(-nMomDir, sqrt( h
550 }
551 else // 2p2h
552 {
553 G4Nucleus recoil(A-2,Z-1);
554 rM = recoil.AtomicMass(A-2,Z-1)+sqrt(nMo
555 hM = tM - rM;
556
557 fLVt = G4LorentzVector( nMomDir, sqrt( r
558 fLVh = G4LorentzVector(-nMomDir, sqrt( h
559 }
560 // G4cout<<hM<<", ";
561 // bst = fLVh.boostVector(); // 9-3-20
562
563 // lvp1.boost(-bst); // 9-3-20 -> nucleon
564
565 fNuEnergy = lvp1.e();
566 iTer = 0;
567
568 do
569 {
570 fXsample = SampleXkr(fNuEnergy);
571 fQtransfer = SampleQkr(fNuEnergy, fXsamp
572 fQ2 = fQtransfer*fQtransfer;
573
574 if( fXsample > 0. )
575 {
576 fW2 = fM1*fM1 - fQ2 + fQ2/fXsample; //
577 fEmu = fNuEnergy - fQ2/2./fM1/fXsample
578 }
579 else
580 {
581 fW2 = fM1*fM1;
582 fEmu = fNuEnergy;
583 }
584
585 // if(fEmu < 0.) G4cout<<"fEmu = "<<fEmu
586
587 e3 = fNuEnergy + fM1 - fEmu;
588
589 // if( e3 < sqrt(fW2) ) G4cout<<"energy
590
591 pMu2 = fEmu*fEmu - fMnumu*fMnumu;
592 pX2 = e3*e3 - fW2;
593
594 fCosTheta = fNuEnergy*fNuEnergy + pMu2
595 fCosTheta /= 2.*fNuEnergy*sqrt(pMu2);
596 iTer++;
597 }
598 while( ( abs(fCosTheta) > 1. || fEmu < fMn
599
600 if( iTer >= iTerMax ) { fBreak = true; ret
601
602 if( abs(fCosTheta) > 1.) // vmg: due to bi
603 {
604 G4cout<<"FM: fCosTheta = "<<fCosTheta<<"
605 // fCosTheta = -1. + 2.*G4UniformRand();
606 if(fCosTheta < -1.) fCosTheta = -1.;
607 if(fCosTheta > 1.) fCosTheta = 1.;
608 }
609 // LVs
610 G4LorentzVector lvt1 = G4LorentzVector( 0
611 G4LorentzVector lvsum = lvp1 + lvt1;
612
613 cost = fCosTheta;
614 sint = std::sqrt( (1.0 - cost)*(1.0 + cost
615 phi = G4UniformRand()*CLHEP::twopi;
616 eP = G4ThreeVector( sint*std::cos(phi),
617 muMom = sqrt(fEmu*fEmu-fMnumu*fMnumu);
618 eP *= muMom;
619 fLVl = G4LorentzVector( eP, fEmu );
620 fLVh = lvsum - fLVl;
621 // back to lab system
622 // fLVl.boost(bst); // 9-3-20
623 // fLVh.boost(bst); // 9-3-20
624 }
625 //G4cout<<iTer<<", "<<fBreak<<"; ";
626 }
627
628 //
629 //
630 ///////////////////////////
631