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