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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 | $Log$ | |
b9d0a01d | 18 | Revision 1.36.6.3 2002/10/10 16:40:08 hristov |
19 | Updating VirtualMC to v3-09-02 | |
20 | ||
21 | Revision 1.39 2002/09/16 08:21:16 morsch | |
22 | Use TDatabasePDG::Instance(); | |
23 | ||
349be858 | 24 | Revision 1.38 2002/05/30 14:59:12 morsch |
25 | Check geometrical acceptance. (G. Martinez) | |
26 | ||
1242532d | 27 | Revision 1.37 2002/04/17 10:20:44 morsch |
28 | Coding Rule violations corrected. | |
29 | ||
6d4dd317 | 30 | Revision 1.36 2002/02/08 16:50:50 morsch |
31 | Add name and title in constructor. | |
32 | ||
8b31bfac | 33 | Revision 1.35 2002/01/21 10:02:40 morsch |
34 | ty is Double_t | |
35 | Abort if too high rapidity causes numerical paroblem. User has to specify | |
36 | meaningful y-range. | |
37 | ||
2d7a47be | 38 | Revision 1.34 2001/11/27 13:13:07 morsch |
39 | Maximum lifetime for long-lived particles to be put on the stack is parameter. | |
40 | It can be set via SetMaximumLifetime(..). | |
41 | ||
47fc6bd5 | 42 | Revision 1.33 2001/10/21 18:35:56 hristov |
43 | Several pointers were set to zero in the default constructors to avoid memory management problems | |
44 | ||
2685bf00 | 45 | Revision 1.32 2001/07/27 17:09:36 morsch |
46 | Use local SetTrack, KeepTrack and SetHighWaterMark methods | |
47 | to delegate either to local stack or to stack owned by AliRun. | |
48 | (Piotr Skowronski, A.M.) | |
49 | ||
a99cf51f | 50 | Revision 1.31 2001/07/13 10:58:54 morsch |
51 | - Some coded moved to AliGenMC | |
52 | - Improved handling of secondary vertices. | |
53 | ||
fff02fee | 54 | Revision 1.30 2001/06/15 07:55:04 morsch |
55 | Put only first generation decay products on the stack. | |
56 | ||
6ba00c52 | 57 | Revision 1.29 2001/03/27 10:58:41 morsch |
58 | Initialize decayer before generation. Important if run inside cocktail. | |
59 | ||
771bbe45 | 60 | Revision 1.28 2001/03/09 13:01:41 morsch |
61 | - enum constants for paramterisation type (particle family) moved to AliGen*lib.h | |
62 | - use AliGenGSIlib::kUpsilon, AliGenPHOSlib::kEtaPrime to access the constants | |
63 | ||
34f60c01 | 64 | Revision 1.27 2001/02/02 15:21:10 morsch |
65 | Set high water mark after last particle. | |
66 | Use Vertex() method for Vertex. | |
67 | ||
d9ea0e3b | 68 | Revision 1.26 2000/12/21 16:24:06 morsch |
69 | Coding convention clean-up | |
70 | ||
675e9664 | 71 | Revision 1.25 2000/11/30 07:12:50 alibrary |
72 | Introducing new Rndm and QA classes | |
73 | ||
65fb704d | 74 | Revision 1.24 2000/10/18 19:11:27 hristov |
75 | Division by zero fixed | |
76 | ||
919c2096 | 77 | Revision 1.23 2000/10/02 21:28:06 fca |
78 | Removal of useless dependecies via forward declarations | |
79 | ||
94de3818 | 80 | Revision 1.22 2000/09/12 14:14:55 morsch |
81 | Call fDecayer->ForceDecay() at the beginning of Generate(). | |
82 | ||
00d6ce7d | 83 | Revision 1.21 2000/09/08 15:39:01 morsch |
84 | Handle the case fForceDecay=all during the generation, i.e. select all secondaries. | |
85 | ||
5ab0acc9 | 86 | Revision 1.20 2000/09/06 14:35:44 morsch |
87 | Use AliDecayerPythia for particle decays. | |
88 | ||
fa480368 | 89 | Revision 1.19 2000/07/11 18:24:56 fca |
90 | Coding convention corrections + few minor bug fixes | |
91 | ||
aee8290b | 92 | Revision 1.18 2000/06/29 21:08:27 morsch |
93 | All paramatrisation libraries derive from the pure virtual base class AliGenLib. | |
94 | This allows to pass a pointer to a library directly to AliGenParam and avoids the | |
95 | use of function pointers in Config.C. | |
96 | ||
b22ee262 | 97 | Revision 1.17 2000/06/09 20:33:30 morsch |
98 | All coding rule violations except RS3 corrected | |
99 | ||
f87cfe57 | 100 | Revision 1.16 2000/05/02 07:51:31 morsch |
101 | - Control precision of pT sampling TF1::SetNpx(..) | |
102 | - Correct initialisation of child-cuts in all constructors. | |
103 | - Most coding rule violations corrected. | |
104 | ||
749070b6 | 105 | Revision 1.15 2000/04/03 15:42:12 morsch |
106 | Cuts on primary particles are separated from those on the decay products. Methods | |
107 | SetChildMomentumRange, SetChildPtRange, SetChildPhiRange, SetChildThetaRange added. | |
108 | ||
cc5d764c | 109 | Revision 1.14 1999/11/09 07:38:48 fca |
110 | Changes for compatibility with version 2.23 of ROOT | |
111 | ||
084c1b4a | 112 | Revision 1.13 1999/11/04 11:30:31 fca |
113 | Correct the logics for SetForceDecay | |
114 | ||
28337bc1 | 115 | Revision 1.12 1999/11/03 17:43:20 fca |
116 | New version from G.Martinez & A.Morsch | |
117 | ||
886b6f73 | 118 | Revision 1.11 1999/09/29 09:24:14 fca |
119 | Introduction of the Copyright and cvs Log | |
120 | ||
4c039060 | 121 | */ |
122 | ||
6d4dd317 | 123 | |
124 | ||
125 | // Class to generate particles from using paramtrized pT and y distributions. | |
126 | // Distributions are obtained from pointer to object of type AliGenLib. | |
127 | // (For example AliGenMUONlib) | |
128 | // Decays are performed using Pythia. | |
129 | // andreas.morsch@cern.ch | |
130 | ||
fe4da5cc | 131 | #include "AliGenParam.h" |
fa480368 | 132 | #include "AliDecayerPythia.h" |
fe4da5cc | 133 | #include "AliGenMUONlib.h" |
134 | #include "AliRun.h" | |
1578254f | 135 | #include <TParticle.h> |
fa480368 | 136 | #include <TParticlePDG.h> |
137 | #include <TDatabasePDG.h> | |
138 | #include <TLorentzVector.h> | |
139 | ||
f87cfe57 | 140 | #include <TF1.h> |
fe4da5cc | 141 | |
142 | ClassImp(AliGenParam) | |
143 | ||
144 | //------------------------------------------------------------ | |
145 | ||
146 | //Begin_Html | |
147 | /* | |
1439f98e | 148 | <img src="picts/AliGenParam.gif"> |
fe4da5cc | 149 | */ |
150 | //End_Html | |
151 | ||
152 | //____________________________________________________________ | |
153 | //____________________________________________________________ | |
154 | AliGenParam::AliGenParam() | |
fe4da5cc | 155 | { |
b22ee262 | 156 | // Deafault constructor |
157 | fPtPara = 0; | |
158 | fYPara = 0; | |
34f60c01 | 159 | fParam = 0; |
160 | fAnalog = kAnalog; | |
b22ee262 | 161 | SetDeltaPt(); |
675e9664 | 162 | // |
163 | // Set random number generator | |
164 | sRandom = fRandom; | |
2685bf00 | 165 | fDecayer = 0; |
8b31bfac | 166 | |
167 | ||
b22ee262 | 168 | } |
169 | ||
fff02fee | 170 | AliGenParam::AliGenParam(Int_t npart, AliGenLib * Library, Int_t param, char* tname):AliGenMC(npart) |
b22ee262 | 171 | { |
172 | // Constructor using number of particles parameterisation id and library | |
8b31bfac | 173 | fName = "Param"; |
174 | fTitle= "Particle Generator using pT and y parameterisation"; | |
b22ee262 | 175 | |
176 | fPtParaFunc = Library->GetPt(param, tname); | |
177 | fYParaFunc = Library->GetY (param, tname); | |
178 | fIpParaFunc = Library->GetIp(param, tname); | |
179 | ||
180 | fPtPara = 0; | |
181 | fYPara = 0; | |
182 | fParam = param; | |
34f60c01 | 183 | fAnalog = kAnalog; |
b22ee262 | 184 | SetForceDecay(); |
b22ee262 | 185 | SetDeltaPt(); |
675e9664 | 186 | // |
187 | // Set random number generator | |
188 | sRandom = fRandom; | |
fe4da5cc | 189 | } |
190 | ||
191 | //____________________________________________________________ | |
886b6f73 | 192 | |
fff02fee | 193 | AliGenParam::AliGenParam(Int_t npart, Int_t param, char* tname):AliGenMC(npart) |
fe4da5cc | 194 | { |
b22ee262 | 195 | // Constructor using parameterisation id and number of particles |
8b31bfac | 196 | // |
197 | fName = "Param"; | |
198 | fTitle= "Particle Generator using pT and y parameterisation"; | |
199 | ||
675e9664 | 200 | AliGenLib* pLibrary = new AliGenMUONlib(); |
b22ee262 | 201 | |
675e9664 | 202 | fPtParaFunc = pLibrary->GetPt(param, tname); |
203 | fYParaFunc = pLibrary->GetY (param, tname); | |
204 | fIpParaFunc = pLibrary->GetIp(param, tname); | |
b22ee262 | 205 | |
206 | fPtPara = 0; | |
207 | fYPara = 0; | |
208 | fParam = param; | |
34f60c01 | 209 | fAnalog = kAnalog; |
b22ee262 | 210 | fChildSelect.Set(5); |
211 | for (Int_t i=0; i<5; i++) fChildSelect[i]=0; | |
212 | SetForceDecay(); | |
213 | SetCutOnChild(); | |
214 | SetChildMomentumRange(); | |
215 | SetChildPtRange(); | |
216 | SetChildPhiRange(); | |
217 | SetChildThetaRange(); | |
218 | SetDeltaPt(); | |
fe4da5cc | 219 | } |
220 | ||
34f60c01 | 221 | AliGenParam::AliGenParam(Int_t npart, Int_t param, |
886b6f73 | 222 | Double_t (*PtPara) (Double_t*, Double_t*), |
223 | Double_t (*YPara ) (Double_t* ,Double_t*), | |
65fb704d | 224 | Int_t (*IpPara) (TRandom *)) |
fff02fee | 225 | :AliGenMC(npart) |
886b6f73 | 226 | { |
749070b6 | 227 | // Constructor |
28337bc1 | 228 | // Gines Martinez 1/10/99 |
8b31bfac | 229 | fName = "Param"; |
230 | fTitle= "Particle Generator using pT and y parameterisation"; | |
231 | ||
886b6f73 | 232 | fPtParaFunc = PtPara; |
233 | fYParaFunc = YPara; | |
234 | fIpParaFunc = IpPara; | |
28337bc1 | 235 | // |
886b6f73 | 236 | fPtPara = 0; |
237 | fYPara = 0; | |
238 | fParam = param; | |
34f60c01 | 239 | fAnalog = kAnalog; |
886b6f73 | 240 | fChildSelect.Set(5); |
241 | for (Int_t i=0; i<5; i++) fChildSelect[i]=0; | |
242 | SetForceDecay(); | |
243 | SetCutOnChild(); | |
749070b6 | 244 | SetChildMomentumRange(); |
245 | SetChildPtRange(); | |
246 | SetChildPhiRange(); | |
247 | SetChildThetaRange(); | |
248 | SetDeltaPt(); | |
886b6f73 | 249 | } |
250 | ||
f87cfe57 | 251 | |
6d4dd317 | 252 | AliGenParam::AliGenParam(const AliGenParam & Param) |
f87cfe57 | 253 | { |
254 | // copy constructor | |
6d4dd317 | 255 | Param.Copy(*this); |
f87cfe57 | 256 | } |
257 | ||
fe4da5cc | 258 | //____________________________________________________________ |
259 | AliGenParam::~AliGenParam() | |
260 | { | |
749070b6 | 261 | // Destructor |
fe4da5cc | 262 | delete fPtPara; |
263 | delete fYPara; | |
264 | } | |
265 | ||
266 | //____________________________________________________________ | |
267 | void AliGenParam::Init() | |
268 | { | |
749070b6 | 269 | // Initialisation |
fa480368 | 270 | |
271 | fDecayer = new AliDecayerPythia(); | |
fe4da5cc | 272 | //Begin_Html |
273 | /* | |
1439f98e | 274 | <img src="picts/AliGenParam.gif"> |
fe4da5cc | 275 | */ |
276 | //End_Html | |
277 | ||
749070b6 | 278 | fPtPara = new TF1("Pt-Parametrization",fPtParaFunc,fPtMin,fPtMax,0); |
279 | // Set representation precision to 10 MeV | |
280 | Int_t npx= Int_t((fPtMax-fPtMin)/fDeltaPt); | |
281 | ||
282 | fPtPara->SetNpx(npx); | |
283 | ||
284 | fYPara = new TF1("Y -Parametrization",fYParaFunc,fYMin,fYMax,0); | |
285 | TF1* ptPara = new TF1("Pt-Parametrization",fPtParaFunc,0,15,0); | |
286 | TF1* yPara = new TF1("Y -Parametrization",fYParaFunc,-6,6,0); | |
b7601ac4 | 287 | |
fe4da5cc | 288 | // |
289 | // dN/dy| y=0 | |
749070b6 | 290 | Double_t y1=0; |
291 | Double_t y2=0; | |
292 | ||
293 | fdNdy0=fYParaFunc(&y1,&y2); | |
fe4da5cc | 294 | // |
295 | // Integral over generation region | |
749070b6 | 296 | Float_t intYS = yPara ->Integral(fYMin, fYMax); |
297 | Float_t intPt0 = ptPara->Integral(0,15); | |
298 | Float_t intPtS = ptPara->Integral(fPtMin,fPtMax); | |
299 | Float_t phiWgt=(fPhiMax-fPhiMin)/2./TMath::Pi(); | |
34f60c01 | 300 | if (fAnalog == kAnalog) { |
749070b6 | 301 | fYWgt = intYS/fdNdy0; |
302 | fPtWgt = intPtS/intPt0; | |
303 | fParentWeight = fYWgt*fPtWgt*phiWgt/fNpart; | |
304 | } else { | |
305 | fYWgt = intYS/fdNdy0; | |
306 | fPtWgt = (fPtMax-fPtMin)/intPt0; | |
307 | fParentWeight = fYWgt*fPtWgt*phiWgt/fNpart; | |
308 | } | |
fe4da5cc | 309 | // |
310 | // particle decay related initialization | |
00d6ce7d | 311 | fDecayer->SetForceDecay(fForceDecay); |
fa480368 | 312 | fDecayer->Init(); |
00d6ce7d | 313 | |
fe4da5cc | 314 | // |
fff02fee | 315 | AliGenMC::Init(); |
fe4da5cc | 316 | } |
317 | ||
318 | //____________________________________________________________ | |
319 | void AliGenParam::Generate() | |
320 | { | |
28337bc1 | 321 | // |
322 | // Generate 'npart' of light and heavy mesons (J/Psi, upsilon or phi, Pion, | |
323 | // Kaons, Etas, Omegas) and Baryons (proton, antiprotons, neutrons and | |
324 | // antineutrons in the the desired theta, phi and momentum windows; | |
325 | // Gaussian smearing on the vertex is done if selected. | |
cc5d764c | 326 | // The decay of heavy mesons is done using lujet, |
327 | // and the childern particle are tracked by GEANT | |
328 | // However, light mesons are directly tracked by GEANT | |
329 | // setting fForceDecay = nodecay (SetForceDecay(nodecay)) | |
28337bc1 | 330 | // |
771bbe45 | 331 | // |
332 | // Reinitialize decayer | |
333 | fDecayer->Init(); | |
334 | // | |
28337bc1 | 335 | Float_t polar[3]= {0,0,0}; // Polarisation of the parent particle (for GEANT tracking) |
336 | Float_t origin0[3]; // Origin of the generated parent particle (for GEANT tracking) | |
337 | Float_t pt, pl, ptot; // Transverse, logitudinal and total momenta of the parent particle | |
338 | Float_t phi, theta; // Phi and theta spherical angles of the parent particle momentum | |
339 | Float_t p[3], pc[3], | |
fff02fee | 340 | och[3]; // Momentum, polarisation and origin of the children particles from lujet |
2d7a47be | 341 | Double_t ty, xmt; |
fff02fee | 342 | Int_t nt, i, j; |
fe4da5cc | 343 | Float_t wgtp, wgtch; |
344 | Double_t dummy; | |
09fd3ea2 | 345 | static TClonesArray *particles; |
fe4da5cc | 346 | // |
fff02fee | 347 | if(!particles) particles = new TClonesArray("TParticle",1000); |
8b31bfac | 348 | |
349be858 | 349 | TDatabasePDG *pDataBase = TDatabasePDG::Instance(); |
fe4da5cc | 350 | // |
351 | Float_t random[6]; | |
28337bc1 | 352 | |
353 | // Calculating vertex position per event | |
fe4da5cc | 354 | for (j=0;j<3;j++) origin0[j]=fOrigin[j]; |
aee8290b | 355 | if(fVertexSmear==kPerEvent) { |
d9ea0e3b | 356 | Vertex(); |
357 | for (j=0;j<3;j++) origin0[j]=fVertex[j]; | |
fe4da5cc | 358 | } |
d9ea0e3b | 359 | |
21aaa175 | 360 | Int_t ipa=0; |
fff02fee | 361 | |
28337bc1 | 362 | // Generating fNpart particles |
21aaa175 | 363 | while (ipa<fNpart) { |
cc5d764c | 364 | while(1) { |
fe4da5cc | 365 | // |
366 | // particle type | |
65fb704d | 367 | Int_t iPart = fIpParaFunc(fRandom); |
fa480368 | 368 | fChildWeight=(fDecayer->GetPartialBranchingRatio(iPart))*fParentWeight; |
675e9664 | 369 | TParticlePDG *particle = pDataBase->GetParticle(iPart); |
fa480368 | 370 | Float_t am = particle->Mass(); |
8b31bfac | 371 | |
65fb704d | 372 | Rndm(random,2); |
fe4da5cc | 373 | // |
374 | // phi | |
375 | phi=fPhiMin+random[0]*(fPhiMax-fPhiMin); | |
376 | // | |
377 | // y | |
2d7a47be | 378 | ty = TMath::TanH(fYPara->GetRandom()); |
fe4da5cc | 379 | // |
380 | // pT | |
34f60c01 | 381 | if (fAnalog == kAnalog) { |
fe4da5cc | 382 | pt=fPtPara->GetRandom(); |
383 | wgtp=fParentWeight; | |
384 | wgtch=fChildWeight; | |
385 | } else { | |
386 | pt=fPtMin+random[1]*(fPtMax-fPtMin); | |
387 | Double_t ptd=pt; | |
388 | wgtp=fParentWeight*fPtParaFunc(& ptd, &dummy); | |
389 | wgtch=fChildWeight*fPtParaFunc(& ptd, &dummy); | |
390 | } | |
391 | xmt=sqrt(pt*pt+am*am); | |
2d7a47be | 392 | if (TMath::Abs(ty)==1.) { |
393 | ty=0.; | |
394 | Fatal("AliGenParam", | |
395 | "Division by 0: Please check you rapidity range !"); | |
396 | } | |
397 | ||
fe4da5cc | 398 | pl=xmt*ty/sqrt(1.-ty*ty); |
399 | theta=TMath::ATan2(pt,pl); | |
cc5d764c | 400 | // Cut on theta |
fe4da5cc | 401 | if(theta<fThetaMin || theta>fThetaMax) continue; |
402 | ptot=TMath::Sqrt(pt*pt+pl*pl); | |
cc5d764c | 403 | // Cut on momentum |
fe4da5cc | 404 | if(ptot<fPMin || ptot>fPMax) continue; |
fff02fee | 405 | // |
fe4da5cc | 406 | p[0]=pt*TMath::Cos(phi); |
407 | p[1]=pt*TMath::Sin(phi); | |
408 | p[2]=pl; | |
aee8290b | 409 | if(fVertexSmear==kPerTrack) { |
65fb704d | 410 | Rndm(random,6); |
fe4da5cc | 411 | for (j=0;j<3;j++) { |
412 | origin0[j]= | |
413 | fOrigin[j]+fOsigma[j]*TMath::Cos(2*random[2*j]*TMath::Pi())* | |
414 | TMath::Sqrt(-2*TMath::Log(random[2*j+1])); | |
415 | } | |
416 | } | |
28337bc1 | 417 | |
418 | // Looking at fForceDecay : | |
cc5d764c | 419 | // if fForceDecay != none Primary particle decays using |
420 | // AliPythia and children are tracked by GEANT | |
28337bc1 | 421 | // |
cc5d764c | 422 | // if fForceDecay == none Primary particle is tracked by GEANT |
423 | // (In the latest, make sure that GEANT actually does all the decays you want) | |
fe4da5cc | 424 | // |
fff02fee | 425 | |
34f60c01 | 426 | if (fForceDecay != kNoDecay) { |
28337bc1 | 427 | // Using lujet to decay particle |
886b6f73 | 428 | Float_t energy=TMath::Sqrt(ptot*ptot+am*am); |
fa480368 | 429 | TLorentzVector pmom(p[0], p[1], p[2], energy); |
430 | fDecayer->Decay(iPart,&pmom); | |
fe4da5cc | 431 | // |
cc5d764c | 432 | // select decay particles |
fa480368 | 433 | Int_t np=fDecayer->ImportParticles(particles); |
1242532d | 434 | |
435 | // Selecting GeometryAcceptance for particles fPdgCodeParticleforAcceptanceCut; | |
436 | if (fGeometryAcceptance) | |
437 | if (!CheckAcceptanceGeometry(np,particles)) continue; | |
886b6f73 | 438 | Int_t ncsel=0; |
fff02fee | 439 | Int_t* pFlag = new Int_t[np]; |
440 | Int_t* pParent = new Int_t[np]; | |
441 | Int_t* pSelected = new Int_t[np]; | |
442 | Int_t* trackIt = new Int_t[np]; | |
443 | ||
444 | for (i=0; i<np; i++) { | |
445 | pFlag[i] = 0; | |
446 | pSelected[i] = 0; | |
447 | pParent[i] = -1; | |
448 | } | |
449 | ||
6ba00c52 | 450 | if (np >1) { |
451 | TParticle* iparticle = (TParticle *) particles->At(0); | |
fff02fee | 452 | Int_t ipF, ipL; |
453 | for (i = 1; i<np ; i++) { | |
454 | trackIt[i] = 1; | |
6ba00c52 | 455 | iparticle = (TParticle *) particles->At(i); |
456 | Int_t kf = iparticle->GetPdgCode(); | |
fff02fee | 457 | Int_t ks = iparticle->GetStatusCode(); |
458 | // flagged particle | |
459 | ||
460 | if (pFlag[i] == 1) { | |
fff02fee | 461 | ipF = iparticle->GetFirstDaughter(); |
462 | ipL = iparticle->GetLastDaughter(); | |
463 | if (ipF > 0) for (j=ipF-1; j<ipL; j++) pFlag[j]=1; | |
464 | continue; | |
465 | } | |
466 | ||
467 | // flag decay products of particles with long life-time (c tau > .3 mum) | |
468 | ||
469 | if (ks != 1) { | |
2d7a47be | 470 | // TParticlePDG *particle = pDataBase->GetParticle(kf); |
fff02fee | 471 | |
472 | Double_t lifeTime = fDecayer->GetLifetime(kf); | |
2d7a47be | 473 | // Double_t mass = particle->Mass(); |
474 | // Double_t width = particle->Width(); | |
47fc6bd5 | 475 | if (lifeTime > (Double_t) fMaxLifeTime) { |
fff02fee | 476 | ipF = iparticle->GetFirstDaughter(); |
477 | ipL = iparticle->GetLastDaughter(); | |
478 | if (ipF > 0) for (j=ipF-1; j<ipL; j++) pFlag[j]=1; | |
479 | } else{ | |
480 | trackIt[i] = 0; | |
481 | pSelected[i] = 1; | |
482 | } | |
483 | } // ks==1 ? | |
fe4da5cc | 484 | // |
485 | // children | |
47fc6bd5 | 486 | |
fff02fee | 487 | if (ChildSelected(TMath::Abs(kf)) || fForceDecay == kAll && trackIt[i]) |
6ba00c52 | 488 | { |
6ba00c52 | 489 | if (fCutOnChild) { |
fff02fee | 490 | pc[0]=iparticle->Px(); |
491 | pc[1]=iparticle->Py(); | |
492 | pc[2]=iparticle->Pz(); | |
493 | Bool_t childok = KinematicSelection(iparticle, 1); | |
494 | if(childok) { | |
495 | pSelected[i] = 1; | |
6ba00c52 | 496 | ncsel++; |
497 | } else { | |
498 | ncsel=-1; | |
499 | break; | |
500 | } // child kine cuts | |
501 | } else { | |
fff02fee | 502 | pSelected[i] = 1; |
886b6f73 | 503 | ncsel++; |
6ba00c52 | 504 | } // if child selection |
505 | } // select muon | |
506 | } // decay particle loop | |
507 | } // if decay products | |
508 | ||
886b6f73 | 509 | Int_t iparent; |
510 | if ((fCutOnChild && ncsel >0) || !fCutOnChild){ | |
511 | ipa++; | |
21aaa175 | 512 | // |
fff02fee | 513 | // Parent |
a99cf51f | 514 | SetTrack(0, -1, iPart, p, origin0, polar, 0, kPPrimary, nt, wgtp); |
fff02fee | 515 | pParent[0] = nt; |
a99cf51f | 516 | KeepTrack(nt); |
fff02fee | 517 | // |
518 | // Decay Products | |
519 | // | |
520 | for (i = 1; i < np; i++) { | |
521 | if (pSelected[i]) { | |
522 | TParticle* iparticle = (TParticle *) particles->At(i); | |
523 | Int_t kf = iparticle->GetPdgCode(); | |
524 | Int_t ipa = iparticle->GetFirstMother()-1; | |
525 | ||
526 | och[0] = origin0[0]+iparticle->Vx()/10; | |
527 | och[1] = origin0[1]+iparticle->Vy()/10; | |
528 | och[2] = origin0[2]+iparticle->Vz()/10; | |
529 | pc[0] = iparticle->Px(); | |
530 | pc[1] = iparticle->Py(); | |
531 | pc[2] = iparticle->Pz(); | |
532 | ||
533 | if (ipa > -1) { | |
534 | iparent = pParent[ipa]; | |
535 | } else { | |
536 | iparent = -1; | |
537 | } | |
1242532d | 538 | |
a99cf51f | 539 | SetTrack(fTrackIt*trackIt[i], iparent, kf, |
fff02fee | 540 | pc, och, polar, |
541 | 0, kPDecay, nt, wgtch); | |
542 | pParent[i] = nt; | |
a99cf51f | 543 | KeepTrack(nt); |
8b31bfac | 544 | } // Selected |
545 | } // Particle loop | |
28337bc1 | 546 | } // Decays by Lujet |
8b31bfac | 547 | particles->Clear(); |
fff02fee | 548 | if (pFlag) delete[] pFlag; |
549 | if (pParent) delete[] pParent; | |
550 | if (pSelected) delete[] pSelected; | |
8b31bfac | 551 | if (trackIt) delete[] trackIt; |
21aaa175 | 552 | } // kinematic selection |
28337bc1 | 553 | else // nodecay option, so parent will be tracked by GEANT (pions, kaons, eta, omegas, baryons) |
554 | { | |
555 | gAlice-> | |
65fb704d | 556 | SetTrack(fTrackIt,-1,iPart,p,origin0,polar,0,kPPrimary,nt,wgtp); |
28337bc1 | 557 | ipa++; |
558 | } | |
fe4da5cc | 559 | break; |
21aaa175 | 560 | } // while |
fe4da5cc | 561 | } // event loop |
a99cf51f | 562 | SetHighWaterMark(nt); |
fe4da5cc | 563 | } |
564 | ||
f87cfe57 | 565 | AliGenParam& AliGenParam::operator=(const AliGenParam& rhs) |
566 | { | |
567 | // Assignment operator | |
568 | return *this; | |
569 | } | |
570 | ||
fe4da5cc | 571 | |
572 |