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4c039060 | 1 | /************************************************************************** |
2 | * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
3 | * * | |
4 | * Author: The ALICE Off-line Project. * | |
5 | * Contributors are mentioned in the code where appropriate. * | |
6 | * * | |
7 | * Permission to use, copy, modify and distribute this software and its * | |
8 | * documentation strictly for non-commercial purposes is hereby granted * | |
9 | * without fee, provided that the above copyright notice appears in all * | |
10 | * copies and that both the copyright notice and this permission notice * | |
11 | * appear in the supporting documentation. The authors make no claims * | |
12 | * about the suitability of this software for any purpose. It is * | |
13 | * provided "as is" without express or implied warranty. * | |
14 | **************************************************************************/ | |
15 | ||
16 | /* | |
17 | $Log$ | |
8b31bfac | 18 | Revision 1.35 2002/01/21 10:02:40 morsch |
19 | ty is Double_t | |
20 | Abort if too high rapidity causes numerical paroblem. User has to specify | |
21 | meaningful y-range. | |
22 | ||
2d7a47be | 23 | Revision 1.34 2001/11/27 13:13:07 morsch |
24 | Maximum lifetime for long-lived particles to be put on the stack is parameter. | |
25 | It can be set via SetMaximumLifetime(..). | |
26 | ||
47fc6bd5 | 27 | Revision 1.33 2001/10/21 18:35:56 hristov |
28 | Several pointers were set to zero in the default constructors to avoid memory management problems | |
29 | ||
2685bf00 | 30 | Revision 1.32 2001/07/27 17:09:36 morsch |
31 | Use local SetTrack, KeepTrack and SetHighWaterMark methods | |
32 | to delegate either to local stack or to stack owned by AliRun. | |
33 | (Piotr Skowronski, A.M.) | |
34 | ||
a99cf51f | 35 | Revision 1.31 2001/07/13 10:58:54 morsch |
36 | - Some coded moved to AliGenMC | |
37 | - Improved handling of secondary vertices. | |
38 | ||
fff02fee | 39 | Revision 1.30 2001/06/15 07:55:04 morsch |
40 | Put only first generation decay products on the stack. | |
41 | ||
6ba00c52 | 42 | Revision 1.29 2001/03/27 10:58:41 morsch |
43 | Initialize decayer before generation. Important if run inside cocktail. | |
44 | ||
771bbe45 | 45 | Revision 1.28 2001/03/09 13:01:41 morsch |
46 | - enum constants for paramterisation type (particle family) moved to AliGen*lib.h | |
47 | - use AliGenGSIlib::kUpsilon, AliGenPHOSlib::kEtaPrime to access the constants | |
48 | ||
34f60c01 | 49 | Revision 1.27 2001/02/02 15:21:10 morsch |
50 | Set high water mark after last particle. | |
51 | Use Vertex() method for Vertex. | |
52 | ||
d9ea0e3b | 53 | Revision 1.26 2000/12/21 16:24:06 morsch |
54 | Coding convention clean-up | |
55 | ||
675e9664 | 56 | Revision 1.25 2000/11/30 07:12:50 alibrary |
57 | Introducing new Rndm and QA classes | |
58 | ||
65fb704d | 59 | Revision 1.24 2000/10/18 19:11:27 hristov |
60 | Division by zero fixed | |
61 | ||
919c2096 | 62 | Revision 1.23 2000/10/02 21:28:06 fca |
63 | Removal of useless dependecies via forward declarations | |
64 | ||
94de3818 | 65 | Revision 1.22 2000/09/12 14:14:55 morsch |
66 | Call fDecayer->ForceDecay() at the beginning of Generate(). | |
67 | ||
00d6ce7d | 68 | Revision 1.21 2000/09/08 15:39:01 morsch |
69 | Handle the case fForceDecay=all during the generation, i.e. select all secondaries. | |
70 | ||
5ab0acc9 | 71 | Revision 1.20 2000/09/06 14:35:44 morsch |
72 | Use AliDecayerPythia for particle decays. | |
73 | ||
fa480368 | 74 | Revision 1.19 2000/07/11 18:24:56 fca |
75 | Coding convention corrections + few minor bug fixes | |
76 | ||
aee8290b | 77 | Revision 1.18 2000/06/29 21:08:27 morsch |
78 | All paramatrisation libraries derive from the pure virtual base class AliGenLib. | |
79 | This allows to pass a pointer to a library directly to AliGenParam and avoids the | |
80 | use of function pointers in Config.C. | |
81 | ||
b22ee262 | 82 | Revision 1.17 2000/06/09 20:33:30 morsch |
83 | All coding rule violations except RS3 corrected | |
84 | ||
f87cfe57 | 85 | Revision 1.16 2000/05/02 07:51:31 morsch |
86 | - Control precision of pT sampling TF1::SetNpx(..) | |
87 | - Correct initialisation of child-cuts in all constructors. | |
88 | - Most coding rule violations corrected. | |
89 | ||
749070b6 | 90 | Revision 1.15 2000/04/03 15:42:12 morsch |
91 | Cuts on primary particles are separated from those on the decay products. Methods | |
92 | SetChildMomentumRange, SetChildPtRange, SetChildPhiRange, SetChildThetaRange added. | |
93 | ||
cc5d764c | 94 | Revision 1.14 1999/11/09 07:38:48 fca |
95 | Changes for compatibility with version 2.23 of ROOT | |
96 | ||
084c1b4a | 97 | Revision 1.13 1999/11/04 11:30:31 fca |
98 | Correct the logics for SetForceDecay | |
99 | ||
28337bc1 | 100 | Revision 1.12 1999/11/03 17:43:20 fca |
101 | New version from G.Martinez & A.Morsch | |
102 | ||
886b6f73 | 103 | Revision 1.11 1999/09/29 09:24:14 fca |
104 | Introduction of the Copyright and cvs Log | |
105 | ||
4c039060 | 106 | */ |
107 | ||
fe4da5cc | 108 | #include "AliGenParam.h" |
fa480368 | 109 | #include "AliDecayerPythia.h" |
fe4da5cc | 110 | #include "AliGenMUONlib.h" |
111 | #include "AliRun.h" | |
1578254f | 112 | #include <TParticle.h> |
fa480368 | 113 | #include <TParticlePDG.h> |
114 | #include <TDatabasePDG.h> | |
115 | #include <TLorentzVector.h> | |
116 | ||
f87cfe57 | 117 | #include <TF1.h> |
fe4da5cc | 118 | |
119 | ClassImp(AliGenParam) | |
120 | ||
121 | //------------------------------------------------------------ | |
122 | ||
123 | //Begin_Html | |
124 | /* | |
1439f98e | 125 | <img src="picts/AliGenParam.gif"> |
fe4da5cc | 126 | */ |
127 | //End_Html | |
128 | ||
129 | //____________________________________________________________ | |
130 | //____________________________________________________________ | |
131 | AliGenParam::AliGenParam() | |
fe4da5cc | 132 | { |
b22ee262 | 133 | // Deafault constructor |
134 | fPtPara = 0; | |
135 | fYPara = 0; | |
34f60c01 | 136 | fParam = 0; |
137 | fAnalog = kAnalog; | |
b22ee262 | 138 | SetDeltaPt(); |
675e9664 | 139 | // |
140 | // Set random number generator | |
141 | sRandom = fRandom; | |
2685bf00 | 142 | fDecayer = 0; |
8b31bfac | 143 | |
144 | ||
b22ee262 | 145 | } |
146 | ||
fff02fee | 147 | AliGenParam::AliGenParam(Int_t npart, AliGenLib * Library, Int_t param, char* tname):AliGenMC(npart) |
b22ee262 | 148 | { |
149 | // Constructor using number of particles parameterisation id and library | |
8b31bfac | 150 | fName = "Param"; |
151 | fTitle= "Particle Generator using pT and y parameterisation"; | |
b22ee262 | 152 | |
153 | fPtParaFunc = Library->GetPt(param, tname); | |
154 | fYParaFunc = Library->GetY (param, tname); | |
155 | fIpParaFunc = Library->GetIp(param, tname); | |
156 | ||
157 | fPtPara = 0; | |
158 | fYPara = 0; | |
159 | fParam = param; | |
34f60c01 | 160 | fAnalog = kAnalog; |
b22ee262 | 161 | SetForceDecay(); |
b22ee262 | 162 | SetDeltaPt(); |
675e9664 | 163 | // |
164 | // Set random number generator | |
165 | sRandom = fRandom; | |
fe4da5cc | 166 | } |
167 | ||
168 | //____________________________________________________________ | |
886b6f73 | 169 | |
fff02fee | 170 | AliGenParam::AliGenParam(Int_t npart, Int_t param, char* tname):AliGenMC(npart) |
fe4da5cc | 171 | { |
b22ee262 | 172 | // Constructor using parameterisation id and number of particles |
8b31bfac | 173 | // |
174 | fName = "Param"; | |
175 | fTitle= "Particle Generator using pT and y parameterisation"; | |
176 | ||
675e9664 | 177 | AliGenLib* pLibrary = new AliGenMUONlib(); |
b22ee262 | 178 | |
675e9664 | 179 | fPtParaFunc = pLibrary->GetPt(param, tname); |
180 | fYParaFunc = pLibrary->GetY (param, tname); | |
181 | fIpParaFunc = pLibrary->GetIp(param, tname); | |
b22ee262 | 182 | |
183 | fPtPara = 0; | |
184 | fYPara = 0; | |
185 | fParam = param; | |
34f60c01 | 186 | fAnalog = kAnalog; |
b22ee262 | 187 | fChildSelect.Set(5); |
188 | for (Int_t i=0; i<5; i++) fChildSelect[i]=0; | |
189 | SetForceDecay(); | |
190 | SetCutOnChild(); | |
191 | SetChildMomentumRange(); | |
192 | SetChildPtRange(); | |
193 | SetChildPhiRange(); | |
194 | SetChildThetaRange(); | |
195 | SetDeltaPt(); | |
fe4da5cc | 196 | } |
197 | ||
34f60c01 | 198 | AliGenParam::AliGenParam(Int_t npart, Int_t param, |
886b6f73 | 199 | Double_t (*PtPara) (Double_t*, Double_t*), |
200 | Double_t (*YPara ) (Double_t* ,Double_t*), | |
65fb704d | 201 | Int_t (*IpPara) (TRandom *)) |
fff02fee | 202 | :AliGenMC(npart) |
886b6f73 | 203 | { |
749070b6 | 204 | // Constructor |
28337bc1 | 205 | // Gines Martinez 1/10/99 |
8b31bfac | 206 | fName = "Param"; |
207 | fTitle= "Particle Generator using pT and y parameterisation"; | |
208 | ||
886b6f73 | 209 | fPtParaFunc = PtPara; |
210 | fYParaFunc = YPara; | |
211 | fIpParaFunc = IpPara; | |
28337bc1 | 212 | // |
886b6f73 | 213 | fPtPara = 0; |
214 | fYPara = 0; | |
215 | fParam = param; | |
34f60c01 | 216 | fAnalog = kAnalog; |
886b6f73 | 217 | fChildSelect.Set(5); |
218 | for (Int_t i=0; i<5; i++) fChildSelect[i]=0; | |
219 | SetForceDecay(); | |
220 | SetCutOnChild(); | |
749070b6 | 221 | SetChildMomentumRange(); |
222 | SetChildPtRange(); | |
223 | SetChildPhiRange(); | |
224 | SetChildThetaRange(); | |
225 | SetDeltaPt(); | |
886b6f73 | 226 | } |
227 | ||
f87cfe57 | 228 | |
229 | AliGenParam::AliGenParam(const AliGenParam & Paramd) | |
230 | { | |
231 | // copy constructor | |
232 | } | |
233 | ||
fe4da5cc | 234 | //____________________________________________________________ |
235 | AliGenParam::~AliGenParam() | |
236 | { | |
749070b6 | 237 | // Destructor |
fe4da5cc | 238 | delete fPtPara; |
239 | delete fYPara; | |
240 | } | |
241 | ||
242 | //____________________________________________________________ | |
243 | void AliGenParam::Init() | |
244 | { | |
749070b6 | 245 | // Initialisation |
fa480368 | 246 | |
247 | fDecayer = new AliDecayerPythia(); | |
fe4da5cc | 248 | //Begin_Html |
249 | /* | |
1439f98e | 250 | <img src="picts/AliGenParam.gif"> |
fe4da5cc | 251 | */ |
252 | //End_Html | |
253 | ||
749070b6 | 254 | fPtPara = new TF1("Pt-Parametrization",fPtParaFunc,fPtMin,fPtMax,0); |
255 | // Set representation precision to 10 MeV | |
256 | Int_t npx= Int_t((fPtMax-fPtMin)/fDeltaPt); | |
257 | ||
258 | fPtPara->SetNpx(npx); | |
259 | ||
260 | fYPara = new TF1("Y -Parametrization",fYParaFunc,fYMin,fYMax,0); | |
261 | TF1* ptPara = new TF1("Pt-Parametrization",fPtParaFunc,0,15,0); | |
262 | TF1* yPara = new TF1("Y -Parametrization",fYParaFunc,-6,6,0); | |
b7601ac4 | 263 | |
fe4da5cc | 264 | // |
265 | // dN/dy| y=0 | |
749070b6 | 266 | Double_t y1=0; |
267 | Double_t y2=0; | |
268 | ||
269 | fdNdy0=fYParaFunc(&y1,&y2); | |
fe4da5cc | 270 | // |
271 | // Integral over generation region | |
749070b6 | 272 | Float_t intYS = yPara ->Integral(fYMin, fYMax); |
273 | Float_t intPt0 = ptPara->Integral(0,15); | |
274 | Float_t intPtS = ptPara->Integral(fPtMin,fPtMax); | |
275 | Float_t phiWgt=(fPhiMax-fPhiMin)/2./TMath::Pi(); | |
34f60c01 | 276 | if (fAnalog == kAnalog) { |
749070b6 | 277 | fYWgt = intYS/fdNdy0; |
278 | fPtWgt = intPtS/intPt0; | |
279 | fParentWeight = fYWgt*fPtWgt*phiWgt/fNpart; | |
280 | } else { | |
281 | fYWgt = intYS/fdNdy0; | |
282 | fPtWgt = (fPtMax-fPtMin)/intPt0; | |
283 | fParentWeight = fYWgt*fPtWgt*phiWgt/fNpart; | |
284 | } | |
fe4da5cc | 285 | // |
286 | // particle decay related initialization | |
00d6ce7d | 287 | fDecayer->SetForceDecay(fForceDecay); |
fa480368 | 288 | fDecayer->Init(); |
00d6ce7d | 289 | |
fe4da5cc | 290 | // |
fff02fee | 291 | AliGenMC::Init(); |
fe4da5cc | 292 | } |
293 | ||
294 | //____________________________________________________________ | |
295 | void AliGenParam::Generate() | |
296 | { | |
28337bc1 | 297 | // |
298 | // Generate 'npart' of light and heavy mesons (J/Psi, upsilon or phi, Pion, | |
299 | // Kaons, Etas, Omegas) and Baryons (proton, antiprotons, neutrons and | |
300 | // antineutrons in the the desired theta, phi and momentum windows; | |
301 | // Gaussian smearing on the vertex is done if selected. | |
cc5d764c | 302 | // The decay of heavy mesons is done using lujet, |
303 | // and the childern particle are tracked by GEANT | |
304 | // However, light mesons are directly tracked by GEANT | |
305 | // setting fForceDecay = nodecay (SetForceDecay(nodecay)) | |
28337bc1 | 306 | // |
771bbe45 | 307 | // |
308 | // Reinitialize decayer | |
309 | fDecayer->Init(); | |
310 | // | |
28337bc1 | 311 | Float_t polar[3]= {0,0,0}; // Polarisation of the parent particle (for GEANT tracking) |
312 | Float_t origin0[3]; // Origin of the generated parent particle (for GEANT tracking) | |
313 | Float_t pt, pl, ptot; // Transverse, logitudinal and total momenta of the parent particle | |
314 | Float_t phi, theta; // Phi and theta spherical angles of the parent particle momentum | |
315 | Float_t p[3], pc[3], | |
fff02fee | 316 | och[3]; // Momentum, polarisation and origin of the children particles from lujet |
2d7a47be | 317 | Double_t ty, xmt; |
fff02fee | 318 | Int_t nt, i, j; |
fe4da5cc | 319 | Float_t wgtp, wgtch; |
320 | Double_t dummy; | |
09fd3ea2 | 321 | static TClonesArray *particles; |
fe4da5cc | 322 | // |
fff02fee | 323 | if(!particles) particles = new TClonesArray("TParticle",1000); |
8b31bfac | 324 | |
675e9664 | 325 | static TDatabasePDG *pDataBase = new TDatabasePDG(); |
326 | if(!pDataBase) pDataBase = new TDatabasePDG(); | |
fe4da5cc | 327 | // |
328 | Float_t random[6]; | |
28337bc1 | 329 | |
330 | // Calculating vertex position per event | |
fe4da5cc | 331 | for (j=0;j<3;j++) origin0[j]=fOrigin[j]; |
aee8290b | 332 | if(fVertexSmear==kPerEvent) { |
d9ea0e3b | 333 | Vertex(); |
334 | for (j=0;j<3;j++) origin0[j]=fVertex[j]; | |
fe4da5cc | 335 | } |
d9ea0e3b | 336 | |
21aaa175 | 337 | Int_t ipa=0; |
fff02fee | 338 | |
28337bc1 | 339 | // Generating fNpart particles |
21aaa175 | 340 | while (ipa<fNpart) { |
cc5d764c | 341 | while(1) { |
fe4da5cc | 342 | // |
343 | // particle type | |
65fb704d | 344 | Int_t iPart = fIpParaFunc(fRandom); |
fa480368 | 345 | fChildWeight=(fDecayer->GetPartialBranchingRatio(iPart))*fParentWeight; |
675e9664 | 346 | TParticlePDG *particle = pDataBase->GetParticle(iPart); |
fa480368 | 347 | Float_t am = particle->Mass(); |
8b31bfac | 348 | |
65fb704d | 349 | Rndm(random,2); |
fe4da5cc | 350 | // |
351 | // phi | |
352 | phi=fPhiMin+random[0]*(fPhiMax-fPhiMin); | |
353 | // | |
354 | // y | |
2d7a47be | 355 | ty = TMath::TanH(fYPara->GetRandom()); |
fe4da5cc | 356 | // |
357 | // pT | |
34f60c01 | 358 | if (fAnalog == kAnalog) { |
fe4da5cc | 359 | pt=fPtPara->GetRandom(); |
360 | wgtp=fParentWeight; | |
361 | wgtch=fChildWeight; | |
362 | } else { | |
363 | pt=fPtMin+random[1]*(fPtMax-fPtMin); | |
364 | Double_t ptd=pt; | |
365 | wgtp=fParentWeight*fPtParaFunc(& ptd, &dummy); | |
366 | wgtch=fChildWeight*fPtParaFunc(& ptd, &dummy); | |
367 | } | |
368 | xmt=sqrt(pt*pt+am*am); | |
2d7a47be | 369 | if (TMath::Abs(ty)==1.) { |
370 | ty=0.; | |
371 | Fatal("AliGenParam", | |
372 | "Division by 0: Please check you rapidity range !"); | |
373 | } | |
374 | ||
fe4da5cc | 375 | pl=xmt*ty/sqrt(1.-ty*ty); |
376 | theta=TMath::ATan2(pt,pl); | |
cc5d764c | 377 | // Cut on theta |
fe4da5cc | 378 | if(theta<fThetaMin || theta>fThetaMax) continue; |
379 | ptot=TMath::Sqrt(pt*pt+pl*pl); | |
cc5d764c | 380 | // Cut on momentum |
fe4da5cc | 381 | if(ptot<fPMin || ptot>fPMax) continue; |
fff02fee | 382 | // |
fe4da5cc | 383 | p[0]=pt*TMath::Cos(phi); |
384 | p[1]=pt*TMath::Sin(phi); | |
385 | p[2]=pl; | |
aee8290b | 386 | if(fVertexSmear==kPerTrack) { |
65fb704d | 387 | Rndm(random,6); |
fe4da5cc | 388 | for (j=0;j<3;j++) { |
389 | origin0[j]= | |
390 | fOrigin[j]+fOsigma[j]*TMath::Cos(2*random[2*j]*TMath::Pi())* | |
391 | TMath::Sqrt(-2*TMath::Log(random[2*j+1])); | |
392 | } | |
393 | } | |
28337bc1 | 394 | |
395 | // Looking at fForceDecay : | |
cc5d764c | 396 | // if fForceDecay != none Primary particle decays using |
397 | // AliPythia and children are tracked by GEANT | |
28337bc1 | 398 | // |
cc5d764c | 399 | // if fForceDecay == none Primary particle is tracked by GEANT |
400 | // (In the latest, make sure that GEANT actually does all the decays you want) | |
fe4da5cc | 401 | // |
fff02fee | 402 | |
34f60c01 | 403 | if (fForceDecay != kNoDecay) { |
28337bc1 | 404 | // Using lujet to decay particle |
886b6f73 | 405 | Float_t energy=TMath::Sqrt(ptot*ptot+am*am); |
fa480368 | 406 | TLorentzVector pmom(p[0], p[1], p[2], energy); |
407 | fDecayer->Decay(iPart,&pmom); | |
fe4da5cc | 408 | // |
cc5d764c | 409 | // select decay particles |
fa480368 | 410 | Int_t np=fDecayer->ImportParticles(particles); |
886b6f73 | 411 | Int_t ncsel=0; |
fff02fee | 412 | Int_t* pFlag = new Int_t[np]; |
413 | Int_t* pParent = new Int_t[np]; | |
414 | Int_t* pSelected = new Int_t[np]; | |
415 | Int_t* trackIt = new Int_t[np]; | |
416 | ||
417 | for (i=0; i<np; i++) { | |
418 | pFlag[i] = 0; | |
419 | pSelected[i] = 0; | |
420 | pParent[i] = -1; | |
421 | } | |
422 | ||
6ba00c52 | 423 | if (np >1) { |
424 | TParticle* iparticle = (TParticle *) particles->At(0); | |
fff02fee | 425 | Int_t ipF, ipL; |
426 | for (i = 1; i<np ; i++) { | |
427 | trackIt[i] = 1; | |
6ba00c52 | 428 | iparticle = (TParticle *) particles->At(i); |
429 | Int_t kf = iparticle->GetPdgCode(); | |
fff02fee | 430 | Int_t ks = iparticle->GetStatusCode(); |
431 | // flagged particle | |
432 | ||
433 | if (pFlag[i] == 1) { | |
fff02fee | 434 | ipF = iparticle->GetFirstDaughter(); |
435 | ipL = iparticle->GetLastDaughter(); | |
436 | if (ipF > 0) for (j=ipF-1; j<ipL; j++) pFlag[j]=1; | |
437 | continue; | |
438 | } | |
439 | ||
440 | // flag decay products of particles with long life-time (c tau > .3 mum) | |
441 | ||
442 | if (ks != 1) { | |
2d7a47be | 443 | // TParticlePDG *particle = pDataBase->GetParticle(kf); |
fff02fee | 444 | |
445 | Double_t lifeTime = fDecayer->GetLifetime(kf); | |
2d7a47be | 446 | // Double_t mass = particle->Mass(); |
447 | // Double_t width = particle->Width(); | |
47fc6bd5 | 448 | if (lifeTime > (Double_t) fMaxLifeTime) { |
fff02fee | 449 | ipF = iparticle->GetFirstDaughter(); |
450 | ipL = iparticle->GetLastDaughter(); | |
451 | if (ipF > 0) for (j=ipF-1; j<ipL; j++) pFlag[j]=1; | |
452 | } else{ | |
453 | trackIt[i] = 0; | |
454 | pSelected[i] = 1; | |
455 | } | |
456 | } // ks==1 ? | |
fe4da5cc | 457 | // |
458 | // children | |
47fc6bd5 | 459 | |
fff02fee | 460 | if (ChildSelected(TMath::Abs(kf)) || fForceDecay == kAll && trackIt[i]) |
6ba00c52 | 461 | { |
6ba00c52 | 462 | if (fCutOnChild) { |
fff02fee | 463 | pc[0]=iparticle->Px(); |
464 | pc[1]=iparticle->Py(); | |
465 | pc[2]=iparticle->Pz(); | |
466 | Bool_t childok = KinematicSelection(iparticle, 1); | |
467 | if(childok) { | |
468 | pSelected[i] = 1; | |
6ba00c52 | 469 | ncsel++; |
470 | } else { | |
471 | ncsel=-1; | |
472 | break; | |
473 | } // child kine cuts | |
474 | } else { | |
fff02fee | 475 | pSelected[i] = 1; |
886b6f73 | 476 | ncsel++; |
6ba00c52 | 477 | } // if child selection |
478 | } // select muon | |
479 | } // decay particle loop | |
480 | } // if decay products | |
481 | ||
886b6f73 | 482 | Int_t iparent; |
483 | if ((fCutOnChild && ncsel >0) || !fCutOnChild){ | |
484 | ipa++; | |
21aaa175 | 485 | // |
fff02fee | 486 | // Parent |
a99cf51f | 487 | SetTrack(0, -1, iPart, p, origin0, polar, 0, kPPrimary, nt, wgtp); |
fff02fee | 488 | pParent[0] = nt; |
a99cf51f | 489 | KeepTrack(nt); |
fff02fee | 490 | // |
491 | // Decay Products | |
492 | // | |
493 | for (i = 1; i < np; i++) { | |
494 | if (pSelected[i]) { | |
495 | TParticle* iparticle = (TParticle *) particles->At(i); | |
496 | Int_t kf = iparticle->GetPdgCode(); | |
497 | Int_t ipa = iparticle->GetFirstMother()-1; | |
498 | ||
499 | och[0] = origin0[0]+iparticle->Vx()/10; | |
500 | och[1] = origin0[1]+iparticle->Vy()/10; | |
501 | och[2] = origin0[2]+iparticle->Vz()/10; | |
502 | pc[0] = iparticle->Px(); | |
503 | pc[1] = iparticle->Py(); | |
504 | pc[2] = iparticle->Pz(); | |
505 | ||
506 | if (ipa > -1) { | |
507 | iparent = pParent[ipa]; | |
508 | } else { | |
509 | iparent = -1; | |
510 | } | |
a99cf51f | 511 | SetTrack(fTrackIt*trackIt[i], iparent, kf, |
fff02fee | 512 | pc, och, polar, |
513 | 0, kPDecay, nt, wgtch); | |
514 | pParent[i] = nt; | |
a99cf51f | 515 | KeepTrack(nt); |
8b31bfac | 516 | } // Selected |
517 | } // Particle loop | |
28337bc1 | 518 | } // Decays by Lujet |
8b31bfac | 519 | particles->Clear(); |
fff02fee | 520 | if (pFlag) delete[] pFlag; |
521 | if (pParent) delete[] pParent; | |
522 | if (pSelected) delete[] pSelected; | |
8b31bfac | 523 | if (trackIt) delete[] trackIt; |
21aaa175 | 524 | } // kinematic selection |
28337bc1 | 525 | else // nodecay option, so parent will be tracked by GEANT (pions, kaons, eta, omegas, baryons) |
526 | { | |
527 | gAlice-> | |
65fb704d | 528 | SetTrack(fTrackIt,-1,iPart,p,origin0,polar,0,kPPrimary,nt,wgtp); |
28337bc1 | 529 | ipa++; |
530 | } | |
fe4da5cc | 531 | break; |
21aaa175 | 532 | } // while |
fe4da5cc | 533 | } // event loop |
a99cf51f | 534 | SetHighWaterMark(nt); |
fe4da5cc | 535 | } |
536 | ||
f87cfe57 | 537 | AliGenParam& AliGenParam::operator=(const AliGenParam& rhs) |
538 | { | |
539 | // Assignment operator | |
540 | return *this; | |
541 | } | |
542 | ||
fe4da5cc | 543 | |
544 |