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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 | ||
88cb7938 | 16 | /* $Id$ */ |
6d4dd317 | 17 | |
18 | // Class to generate particles from using paramtrized pT and y distributions. | |
19 | // Distributions are obtained from pointer to object of type AliGenLib. | |
20 | // (For example AliGenMUONlib) | |
21 | // Decays are performed using Pythia. | |
22 | // andreas.morsch@cern.ch | |
23 | ||
ac3faee4 | 24 | #include <TCanvas.h> |
fa480368 | 25 | #include <TDatabasePDG.h> |
ac3faee4 | 26 | #include <TF1.h> |
27 | #include <TH1F.h> | |
fa480368 | 28 | #include <TLorentzVector.h> |
ac3faee4 | 29 | #include <TMath.h> |
30 | #include <TParticle.h> | |
31 | #include <TParticlePDG.h> | |
828fff0d | 32 | #include <TROOT.h> |
ac3faee4 | 33 | #include <TVirtualMC.h> |
fa480368 | 34 | |
ac3faee4 | 35 | #include "AliDecayer.h" |
36 | #include "AliGenMUONlib.h" | |
37 | #include "AliGenParam.h" | |
5d12ce38 | 38 | #include "AliMC.h" |
ac3faee4 | 39 | #include "AliRun.h" |
fe4da5cc | 40 | |
41 | ClassImp(AliGenParam) | |
42 | ||
43 | //------------------------------------------------------------ | |
44 | ||
45 | //Begin_Html | |
46 | /* | |
1439f98e | 47 | <img src="picts/AliGenParam.gif"> |
fe4da5cc | 48 | */ |
49 | //End_Html | |
50 | ||
fe4da5cc | 51 | //____________________________________________________________ |
1c56e311 | 52 | AliGenParam::AliGenParam(): |
53 | fPtParaFunc(0), | |
54 | fYParaFunc(0), | |
55 | fIpParaFunc(0), | |
56 | fPtPara(0), | |
57 | fYPara(0), | |
58 | fParam(0), | |
59 | fdNdy0(0.), | |
60 | fYWgt(0.), | |
61 | fPtWgt(0.), | |
62 | fBias(0.), | |
63 | fTrials(0), | |
64 | fDeltaPt(0.01), | |
65 | fDecayer(0) | |
fe4da5cc | 66 | { |
1c56e311 | 67 | // Default constructor |
b22ee262 | 68 | } |
2ad38d56 | 69 | //____________________________________________________________ |
1c56e311 | 70 | AliGenParam::AliGenParam(Int_t npart, AliGenLib * Library, Int_t param, char* tname) |
71 | :AliGenMC(npart), | |
72 | fPtParaFunc(Library->GetPt(param, tname)), | |
73 | fYParaFunc (Library->GetY (param, tname)), | |
74 | fIpParaFunc(Library->GetIp(param, tname)), | |
75 | fPtPara(0), | |
76 | fYPara(0), | |
77 | fParam(param), | |
78 | fdNdy0(0.), | |
79 | fYWgt(0.), | |
80 | fPtWgt(0.), | |
81 | fBias(0.), | |
82 | fTrials(0), | |
83 | fDeltaPt(0.01), | |
84 | fDecayer(0) | |
b22ee262 | 85 | { |
86 | // Constructor using number of particles parameterisation id and library | |
8b31bfac | 87 | fName = "Param"; |
88 | fTitle= "Particle Generator using pT and y parameterisation"; | |
34f60c01 | 89 | fAnalog = kAnalog; |
b22ee262 | 90 | SetForceDecay(); |
fe4da5cc | 91 | } |
fe4da5cc | 92 | //____________________________________________________________ |
1c56e311 | 93 | AliGenParam::AliGenParam(Int_t npart, Int_t param, const char* tname, const char* name): |
94 | AliGenMC(npart), | |
95 | fPtParaFunc(0), | |
96 | fYParaFunc (0), | |
97 | fIpParaFunc(0), | |
98 | fPtPara(0), | |
99 | fYPara(0), | |
100 | fParam(param), | |
101 | fdNdy0(0.), | |
102 | fYWgt(0.), | |
103 | fPtWgt(0.), | |
104 | fBias(0.), | |
105 | fTrials(0), | |
106 | fDeltaPt(0.01), | |
107 | fDecayer(0) | |
fe4da5cc | 108 | { |
b22ee262 | 109 | // Constructor using parameterisation id and number of particles |
8b31bfac | 110 | // |
1c56e311 | 111 | fName = name; |
112 | fTitle= "Particle Generator using pT and y parameterisation"; | |
8b31bfac | 113 | |
675e9664 | 114 | AliGenLib* pLibrary = new AliGenMUONlib(); |
675e9664 | 115 | fPtParaFunc = pLibrary->GetPt(param, tname); |
116 | fYParaFunc = pLibrary->GetY (param, tname); | |
117 | fIpParaFunc = pLibrary->GetIp(param, tname); | |
b22ee262 | 118 | |
34f60c01 | 119 | fAnalog = kAnalog; |
b22ee262 | 120 | fChildSelect.Set(5); |
121 | for (Int_t i=0; i<5; i++) fChildSelect[i]=0; | |
122 | SetForceDecay(); | |
123 | SetCutOnChild(); | |
124 | SetChildMomentumRange(); | |
125 | SetChildPtRange(); | |
126 | SetChildPhiRange(); | |
127 | SetChildThetaRange(); | |
fe4da5cc | 128 | } |
2ad38d56 | 129 | //____________________________________________________________ |
fe4da5cc | 130 | |
34f60c01 | 131 | AliGenParam::AliGenParam(Int_t npart, Int_t param, |
886b6f73 | 132 | Double_t (*PtPara) (Double_t*, Double_t*), |
133 | Double_t (*YPara ) (Double_t* ,Double_t*), | |
65fb704d | 134 | Int_t (*IpPara) (TRandom *)) |
1c56e311 | 135 | :AliGenMC(npart), |
136 | ||
137 | fPtParaFunc(PtPara), | |
138 | fYParaFunc(YPara), | |
139 | fIpParaFunc(IpPara), | |
140 | fPtPara(0), | |
141 | fYPara(0), | |
142 | fParam(param), | |
143 | fdNdy0(0.), | |
144 | fYWgt(0.), | |
145 | fPtWgt(0.), | |
146 | fBias(0.), | |
147 | fTrials(0), | |
148 | fDeltaPt(0.01), | |
149 | fDecayer(0) | |
886b6f73 | 150 | { |
749070b6 | 151 | // Constructor |
28337bc1 | 152 | // Gines Martinez 1/10/99 |
8b31bfac | 153 | fName = "Param"; |
154 | fTitle= "Particle Generator using pT and y parameterisation"; | |
155 | ||
34f60c01 | 156 | fAnalog = kAnalog; |
886b6f73 | 157 | fChildSelect.Set(5); |
158 | for (Int_t i=0; i<5; i++) fChildSelect[i]=0; | |
159 | SetForceDecay(); | |
160 | SetCutOnChild(); | |
749070b6 | 161 | SetChildMomentumRange(); |
162 | SetChildPtRange(); | |
163 | SetChildPhiRange(); | |
164 | SetChildThetaRange(); | |
886b6f73 | 165 | } |
166 | ||
f87cfe57 | 167 | |
6d4dd317 | 168 | AliGenParam::AliGenParam(const AliGenParam & Param) |
1c56e311 | 169 | :AliGenMC(Param), |
170 | fPtParaFunc(0), | |
171 | fYParaFunc(0), | |
172 | fIpParaFunc(0), | |
173 | fPtPara(0), | |
174 | fYPara(0), | |
175 | fParam(0), | |
176 | fdNdy0(0.), | |
177 | fYWgt(0.), | |
178 | fPtWgt(0.), | |
179 | fBias(0.), | |
180 | fTrials(0), | |
181 | fDeltaPt(0.01), | |
182 | fDecayer(0) | |
f87cfe57 | 183 | { |
198bb1c7 | 184 | // Copy constructor |
6d4dd317 | 185 | Param.Copy(*this); |
f87cfe57 | 186 | } |
187 | ||
fe4da5cc | 188 | //____________________________________________________________ |
189 | AliGenParam::~AliGenParam() | |
190 | { | |
749070b6 | 191 | // Destructor |
fe4da5cc | 192 | delete fPtPara; |
193 | delete fYPara; | |
194 | } | |
195 | ||
196 | //____________________________________________________________ | |
197 | void AliGenParam::Init() | |
198 | { | |
749070b6 | 199 | // Initialisation |
fa480368 | 200 | |
2904363f | 201 | if (gMC) fDecayer = gMC->GetDecayer(); |
fe4da5cc | 202 | //Begin_Html |
203 | /* | |
1439f98e | 204 | <img src="picts/AliGenParam.gif"> |
fe4da5cc | 205 | */ |
206 | //End_Html | |
c5c3e4b0 | 207 | char name[256]; |
208 | sprintf(name, "pt-parameterisation for %s", GetName()); | |
209 | ||
2ad38d56 | 210 | if (fPtPara) fPtPara->Delete(); |
c5c3e4b0 | 211 | fPtPara = new TF1(name, fPtParaFunc, fPtMin, fPtMax,0); |
828fff0d | 212 | gROOT->GetListOfFunctions()->Remove(fPtPara); |
749070b6 | 213 | // Set representation precision to 10 MeV |
c5c3e4b0 | 214 | Int_t npx= Int_t((fPtMax - fPtMin) / fDeltaPt); |
749070b6 | 215 | |
216 | fPtPara->SetNpx(npx); | |
c5c3e4b0 | 217 | |
218 | sprintf(name, "y-parameterisation for %s", GetName()); | |
2ad38d56 | 219 | if (fYPara) fYPara->Delete(); |
c5c3e4b0 | 220 | fYPara = new TF1(name, fYParaFunc, fYMin, fYMax, 0); |
828fff0d | 221 | gROOT->GetListOfFunctions()->Remove(fYPara); |
222 | ||
749070b6 | 223 | |
c5c3e4b0 | 224 | sprintf(name, "pt-for-%s", GetName()); |
225 | TF1 ptPara(name ,fPtParaFunc, 0, 15, 0); | |
226 | sprintf(name, "y-for-%s", GetName()); | |
227 | TF1 yPara(name, fYParaFunc, -6, 6, 0); | |
b7601ac4 | 228 | |
fe4da5cc | 229 | // |
230 | // dN/dy| y=0 | |
749070b6 | 231 | Double_t y1=0; |
232 | Double_t y2=0; | |
233 | ||
234 | fdNdy0=fYParaFunc(&y1,&y2); | |
fe4da5cc | 235 | // |
236 | // Integral over generation region | |
389a9124 | 237 | Float_t intYS = yPara.Integral(fYMin, fYMax,(Double_t*) 0x0,1.e-6); |
238 | Float_t intPt0 = ptPara.Integral(0,15,(Double_t *) 0x0,1.e-6); | |
239 | Float_t intPtS = ptPara.Integral(fPtMin,fPtMax,(Double_t*) 0x0,1.e-6); | |
749070b6 | 240 | Float_t phiWgt=(fPhiMax-fPhiMin)/2./TMath::Pi(); |
34f60c01 | 241 | if (fAnalog == kAnalog) { |
749070b6 | 242 | fYWgt = intYS/fdNdy0; |
243 | fPtWgt = intPtS/intPt0; | |
244 | fParentWeight = fYWgt*fPtWgt*phiWgt/fNpart; | |
245 | } else { | |
246 | fYWgt = intYS/fdNdy0; | |
247 | fPtWgt = (fPtMax-fPtMin)/intPt0; | |
248 | fParentWeight = fYWgt*fPtWgt*phiWgt/fNpart; | |
249 | } | |
fe4da5cc | 250 | // |
251 | // particle decay related initialization | |
00d6ce7d | 252 | fDecayer->SetForceDecay(fForceDecay); |
fa480368 | 253 | fDecayer->Init(); |
00d6ce7d | 254 | |
fe4da5cc | 255 | // |
fff02fee | 256 | AliGenMC::Init(); |
fe4da5cc | 257 | } |
258 | ||
259 | //____________________________________________________________ | |
260 | void AliGenParam::Generate() | |
261 | { | |
28337bc1 | 262 | // |
263 | // Generate 'npart' of light and heavy mesons (J/Psi, upsilon or phi, Pion, | |
264 | // Kaons, Etas, Omegas) and Baryons (proton, antiprotons, neutrons and | |
265 | // antineutrons in the the desired theta, phi and momentum windows; | |
266 | // Gaussian smearing on the vertex is done if selected. | |
cc5d764c | 267 | // The decay of heavy mesons is done using lujet, |
268 | // and the childern particle are tracked by GEANT | |
269 | // However, light mesons are directly tracked by GEANT | |
270 | // setting fForceDecay = nodecay (SetForceDecay(nodecay)) | |
28337bc1 | 271 | // |
771bbe45 | 272 | // |
273 | // Reinitialize decayer | |
2ad38d56 | 274 | fDecayer->SetForceDecay(fForceDecay); |
275 | fDecayer->Init(); | |
276 | ||
771bbe45 | 277 | // |
28337bc1 | 278 | Float_t polar[3]= {0,0,0}; // Polarisation of the parent particle (for GEANT tracking) |
279 | Float_t origin0[3]; // Origin of the generated parent particle (for GEANT tracking) | |
280 | Float_t pt, pl, ptot; // Transverse, logitudinal and total momenta of the parent particle | |
281 | Float_t phi, theta; // Phi and theta spherical angles of the parent particle momentum | |
282 | Float_t p[3], pc[3], | |
fff02fee | 283 | och[3]; // Momentum, polarisation and origin of the children particles from lujet |
2d7a47be | 284 | Double_t ty, xmt; |
fff02fee | 285 | Int_t nt, i, j; |
fe4da5cc | 286 | Float_t wgtp, wgtch; |
287 | Double_t dummy; | |
09fd3ea2 | 288 | static TClonesArray *particles; |
fe4da5cc | 289 | // |
fff02fee | 290 | if(!particles) particles = new TClonesArray("TParticle",1000); |
8b31bfac | 291 | |
349be858 | 292 | TDatabasePDG *pDataBase = TDatabasePDG::Instance(); |
fe4da5cc | 293 | // |
294 | Float_t random[6]; | |
28337bc1 | 295 | |
296 | // Calculating vertex position per event | |
fe4da5cc | 297 | for (j=0;j<3;j++) origin0[j]=fOrigin[j]; |
aee8290b | 298 | if(fVertexSmear==kPerEvent) { |
d9ea0e3b | 299 | Vertex(); |
300 | for (j=0;j<3;j++) origin0[j]=fVertex[j]; | |
fe4da5cc | 301 | } |
d9ea0e3b | 302 | |
21aaa175 | 303 | Int_t ipa=0; |
fff02fee | 304 | |
28337bc1 | 305 | // Generating fNpart particles |
21aaa175 | 306 | while (ipa<fNpart) { |
cc5d764c | 307 | while(1) { |
fe4da5cc | 308 | // |
2ad38d56 | 309 | // particle type |
65fb704d | 310 | Int_t iPart = fIpParaFunc(fRandom); |
fa480368 | 311 | fChildWeight=(fDecayer->GetPartialBranchingRatio(iPart))*fParentWeight; |
675e9664 | 312 | TParticlePDG *particle = pDataBase->GetParticle(iPart); |
fa480368 | 313 | Float_t am = particle->Mass(); |
8b31bfac | 314 | |
65fb704d | 315 | Rndm(random,2); |
fe4da5cc | 316 | // |
317 | // phi | |
318 | phi=fPhiMin+random[0]*(fPhiMax-fPhiMin); | |
319 | // | |
320 | // y | |
2d7a47be | 321 | ty = TMath::TanH(fYPara->GetRandom()); |
fe4da5cc | 322 | // |
323 | // pT | |
34f60c01 | 324 | if (fAnalog == kAnalog) { |
fe4da5cc | 325 | pt=fPtPara->GetRandom(); |
326 | wgtp=fParentWeight; | |
327 | wgtch=fChildWeight; | |
328 | } else { | |
329 | pt=fPtMin+random[1]*(fPtMax-fPtMin); | |
330 | Double_t ptd=pt; | |
331 | wgtp=fParentWeight*fPtParaFunc(& ptd, &dummy); | |
332 | wgtch=fChildWeight*fPtParaFunc(& ptd, &dummy); | |
333 | } | |
334 | xmt=sqrt(pt*pt+am*am); | |
2d7a47be | 335 | if (TMath::Abs(ty)==1.) { |
336 | ty=0.; | |
337 | Fatal("AliGenParam", | |
338 | "Division by 0: Please check you rapidity range !"); | |
339 | } | |
340 | ||
fe4da5cc | 341 | pl=xmt*ty/sqrt(1.-ty*ty); |
342 | theta=TMath::ATan2(pt,pl); | |
cc5d764c | 343 | // Cut on theta |
fe4da5cc | 344 | if(theta<fThetaMin || theta>fThetaMax) continue; |
345 | ptot=TMath::Sqrt(pt*pt+pl*pl); | |
cc5d764c | 346 | // Cut on momentum |
fe4da5cc | 347 | if(ptot<fPMin || ptot>fPMax) continue; |
fff02fee | 348 | // |
fe4da5cc | 349 | p[0]=pt*TMath::Cos(phi); |
350 | p[1]=pt*TMath::Sin(phi); | |
351 | p[2]=pl; | |
aee8290b | 352 | if(fVertexSmear==kPerTrack) { |
65fb704d | 353 | Rndm(random,6); |
fe4da5cc | 354 | for (j=0;j<3;j++) { |
355 | origin0[j]= | |
356 | fOrigin[j]+fOsigma[j]*TMath::Cos(2*random[2*j]*TMath::Pi())* | |
357 | TMath::Sqrt(-2*TMath::Log(random[2*j+1])); | |
358 | } | |
359 | } | |
28337bc1 | 360 | |
361 | // Looking at fForceDecay : | |
cc5d764c | 362 | // if fForceDecay != none Primary particle decays using |
363 | // AliPythia and children are tracked by GEANT | |
28337bc1 | 364 | // |
cc5d764c | 365 | // if fForceDecay == none Primary particle is tracked by GEANT |
366 | // (In the latest, make sure that GEANT actually does all the decays you want) | |
fe4da5cc | 367 | // |
fff02fee | 368 | |
34f60c01 | 369 | if (fForceDecay != kNoDecay) { |
28337bc1 | 370 | // Using lujet to decay particle |
886b6f73 | 371 | Float_t energy=TMath::Sqrt(ptot*ptot+am*am); |
fa480368 | 372 | TLorentzVector pmom(p[0], p[1], p[2], energy); |
373 | fDecayer->Decay(iPart,&pmom); | |
fe4da5cc | 374 | // |
cc5d764c | 375 | // select decay particles |
fa480368 | 376 | Int_t np=fDecayer->ImportParticles(particles); |
1242532d | 377 | |
378 | // Selecting GeometryAcceptance for particles fPdgCodeParticleforAcceptanceCut; | |
379 | if (fGeometryAcceptance) | |
380 | if (!CheckAcceptanceGeometry(np,particles)) continue; | |
886b6f73 | 381 | Int_t ncsel=0; |
fff02fee | 382 | Int_t* pFlag = new Int_t[np]; |
383 | Int_t* pParent = new Int_t[np]; | |
384 | Int_t* pSelected = new Int_t[np]; | |
385 | Int_t* trackIt = new Int_t[np]; | |
386 | ||
387 | for (i=0; i<np; i++) { | |
388 | pFlag[i] = 0; | |
389 | pSelected[i] = 0; | |
390 | pParent[i] = -1; | |
391 | } | |
392 | ||
6ba00c52 | 393 | if (np >1) { |
394 | TParticle* iparticle = (TParticle *) particles->At(0); | |
fff02fee | 395 | Int_t ipF, ipL; |
396 | for (i = 1; i<np ; i++) { | |
397 | trackIt[i] = 1; | |
6ba00c52 | 398 | iparticle = (TParticle *) particles->At(i); |
399 | Int_t kf = iparticle->GetPdgCode(); | |
fff02fee | 400 | Int_t ks = iparticle->GetStatusCode(); |
401 | // flagged particle | |
402 | ||
403 | if (pFlag[i] == 1) { | |
fff02fee | 404 | ipF = iparticle->GetFirstDaughter(); |
405 | ipL = iparticle->GetLastDaughter(); | |
406 | if (ipF > 0) for (j=ipF-1; j<ipL; j++) pFlag[j]=1; | |
407 | continue; | |
408 | } | |
409 | ||
410 | // flag decay products of particles with long life-time (c tau > .3 mum) | |
411 | ||
412 | if (ks != 1) { | |
2d7a47be | 413 | // TParticlePDG *particle = pDataBase->GetParticle(kf); |
fff02fee | 414 | |
415 | Double_t lifeTime = fDecayer->GetLifetime(kf); | |
2d7a47be | 416 | // Double_t mass = particle->Mass(); |
417 | // Double_t width = particle->Width(); | |
47fc6bd5 | 418 | if (lifeTime > (Double_t) fMaxLifeTime) { |
fff02fee | 419 | ipF = iparticle->GetFirstDaughter(); |
420 | ipL = iparticle->GetLastDaughter(); | |
421 | if (ipF > 0) for (j=ipF-1; j<ipL; j++) pFlag[j]=1; | |
422 | } else{ | |
423 | trackIt[i] = 0; | |
424 | pSelected[i] = 1; | |
425 | } | |
426 | } // ks==1 ? | |
fe4da5cc | 427 | // |
428 | // children | |
47fc6bd5 | 429 | |
fff02fee | 430 | if (ChildSelected(TMath::Abs(kf)) || fForceDecay == kAll && trackIt[i]) |
6ba00c52 | 431 | { |
6ba00c52 | 432 | if (fCutOnChild) { |
fff02fee | 433 | pc[0]=iparticle->Px(); |
434 | pc[1]=iparticle->Py(); | |
435 | pc[2]=iparticle->Pz(); | |
436 | Bool_t childok = KinematicSelection(iparticle, 1); | |
437 | if(childok) { | |
438 | pSelected[i] = 1; | |
6ba00c52 | 439 | ncsel++; |
440 | } else { | |
441 | ncsel=-1; | |
442 | break; | |
443 | } // child kine cuts | |
444 | } else { | |
fff02fee | 445 | pSelected[i] = 1; |
886b6f73 | 446 | ncsel++; |
6ba00c52 | 447 | } // if child selection |
448 | } // select muon | |
449 | } // decay particle loop | |
450 | } // if decay products | |
451 | ||
886b6f73 | 452 | Int_t iparent; |
453 | if ((fCutOnChild && ncsel >0) || !fCutOnChild){ | |
454 | ipa++; | |
21aaa175 | 455 | // |
fff02fee | 456 | // Parent |
642f15cf | 457 | PushTrack(0, -1, iPart, p, origin0, polar, 0, kPPrimary, nt, wgtp); |
fff02fee | 458 | pParent[0] = nt; |
a99cf51f | 459 | KeepTrack(nt); |
fff02fee | 460 | // |
461 | // Decay Products | |
462 | // | |
463 | for (i = 1; i < np; i++) { | |
464 | if (pSelected[i]) { | |
465 | TParticle* iparticle = (TParticle *) particles->At(i); | |
466 | Int_t kf = iparticle->GetPdgCode(); | |
467 | Int_t ipa = iparticle->GetFirstMother()-1; | |
468 | ||
469 | och[0] = origin0[0]+iparticle->Vx()/10; | |
470 | och[1] = origin0[1]+iparticle->Vy()/10; | |
471 | och[2] = origin0[2]+iparticle->Vz()/10; | |
472 | pc[0] = iparticle->Px(); | |
473 | pc[1] = iparticle->Py(); | |
474 | pc[2] = iparticle->Pz(); | |
475 | ||
476 | if (ipa > -1) { | |
477 | iparent = pParent[ipa]; | |
478 | } else { | |
479 | iparent = -1; | |
480 | } | |
1242532d | 481 | |
642f15cf | 482 | PushTrack(fTrackIt*trackIt[i], iparent, kf, |
fff02fee | 483 | pc, och, polar, |
484 | 0, kPDecay, nt, wgtch); | |
485 | pParent[i] = nt; | |
a99cf51f | 486 | KeepTrack(nt); |
8b31bfac | 487 | } // Selected |
488 | } // Particle loop | |
28337bc1 | 489 | } // Decays by Lujet |
8b31bfac | 490 | particles->Clear(); |
fff02fee | 491 | if (pFlag) delete[] pFlag; |
492 | if (pParent) delete[] pParent; | |
493 | if (pSelected) delete[] pSelected; | |
8b31bfac | 494 | if (trackIt) delete[] trackIt; |
21aaa175 | 495 | } // kinematic selection |
28337bc1 | 496 | else // nodecay option, so parent will be tracked by GEANT (pions, kaons, eta, omegas, baryons) |
497 | { | |
5d12ce38 | 498 | gAlice->GetMCApp()-> |
642f15cf | 499 | PushTrack(fTrackIt,-1,iPart,p,origin0,polar,0,kPPrimary,nt,wgtp); |
28337bc1 | 500 | ipa++; |
501 | } | |
fe4da5cc | 502 | break; |
21aaa175 | 503 | } // while |
fe4da5cc | 504 | } // event loop |
a99cf51f | 505 | SetHighWaterMark(nt); |
fe4da5cc | 506 | } |
2ad38d56 | 507 | //____________________________________________________________________________________ |
508 | Float_t AliGenParam::GetRelativeArea(Float_t ptMin, Float_t ptMax, Float_t yMin, Float_t yMax, Float_t phiMin, Float_t phiMax) | |
509 | { | |
510 | // | |
511 | // Normalisation for selected kinematic region | |
512 | // | |
513 | Float_t ratio = | |
389a9124 | 514 | fPtPara->Integral(ptMin,ptMax,(Double_t *)0,1.e-6) / fPtPara->Integral( fPtPara->GetXmin(), fPtPara->GetXmax(),(Double_t *)0,1.e-6) * |
515 | fYPara->Integral(yMin,yMax,(Double_t *)0,1.e-6)/fYPara->Integral(fYPara->GetXmin(),fYPara->GetXmax(),(Double_t *)0,1.e-6) * | |
2ad38d56 | 516 | (phiMax-phiMin)/360.; |
517 | return TMath::Abs(ratio); | |
518 | } | |
519 | ||
520 | //____________________________________________________________________________________ | |
fe4da5cc | 521 | |
dc1d768c | 522 | void AliGenParam::Draw( const char * /*opt*/) |
5bd39445 | 523 | { |
524 | // | |
525 | // Draw the pT and y Distributions | |
526 | // | |
527 | TCanvas *c0 = new TCanvas("c0","Canvas 0",400,10,600,700); | |
528 | c0->Divide(2,1); | |
529 | c0->cd(1); | |
530 | fPtPara->Draw(); | |
531 | fPtPara->GetHistogram()->SetXTitle("p_{T} (GeV)"); | |
532 | c0->cd(2); | |
533 | fYPara->Draw(); | |
534 | fYPara->GetHistogram()->SetXTitle("y"); | |
535 | } | |
536 | ||
f87cfe57 | 537 | AliGenParam& AliGenParam::operator=(const AliGenParam& rhs) |
538 | { | |
539 | // Assignment operator | |
198bb1c7 | 540 | rhs.Copy(*this); |
f87cfe57 | 541 | return *this; |
542 | } | |
543 | ||
fe4da5cc | 544 | |
545 |