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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> |
7ca4655f | 25 | #include <TClonesArray.h> |
fa480368 | 26 | #include <TDatabasePDG.h> |
ac3faee4 | 27 | #include <TF1.h> |
28 | #include <TH1F.h> | |
fa480368 | 29 | #include <TLorentzVector.h> |
ac3faee4 | 30 | #include <TMath.h> |
31 | #include <TParticle.h> | |
32 | #include <TParticlePDG.h> | |
828fff0d | 33 | #include <TROOT.h> |
ac3faee4 | 34 | #include <TVirtualMC.h> |
fa480368 | 35 | |
ac3faee4 | 36 | #include "AliDecayer.h" |
37 | #include "AliGenMUONlib.h" | |
38 | #include "AliGenParam.h" | |
5d12ce38 | 39 | #include "AliMC.h" |
ac3faee4 | 40 | #include "AliRun.h" |
fe4da5cc | 41 | |
42 | ClassImp(AliGenParam) | |
43 | ||
44 | //------------------------------------------------------------ | |
45 | ||
46 | //Begin_Html | |
47 | /* | |
1439f98e | 48 | <img src="picts/AliGenParam.gif"> |
fe4da5cc | 49 | */ |
50 | //End_Html | |
51 | ||
fe4da5cc | 52 | //____________________________________________________________ |
1c56e311 | 53 | AliGenParam::AliGenParam(): |
54 | fPtParaFunc(0), | |
55 | fYParaFunc(0), | |
56 | fIpParaFunc(0), | |
57 | fPtPara(0), | |
58 | fYPara(0), | |
59 | fParam(0), | |
60 | fdNdy0(0.), | |
61 | fYWgt(0.), | |
62 | fPtWgt(0.), | |
63 | fBias(0.), | |
64 | fTrials(0), | |
65 | fDeltaPt(0.01), | |
66 | fDecayer(0) | |
fe4da5cc | 67 | { |
1c56e311 | 68 | // Default constructor |
b22ee262 | 69 | } |
2ad38d56 | 70 | //____________________________________________________________ |
1c56e311 | 71 | AliGenParam::AliGenParam(Int_t npart, AliGenLib * Library, Int_t param, char* tname) |
72 | :AliGenMC(npart), | |
73 | fPtParaFunc(Library->GetPt(param, tname)), | |
74 | fYParaFunc (Library->GetY (param, tname)), | |
75 | fIpParaFunc(Library->GetIp(param, tname)), | |
76 | fPtPara(0), | |
77 | fYPara(0), | |
78 | fParam(param), | |
79 | fdNdy0(0.), | |
80 | fYWgt(0.), | |
81 | fPtWgt(0.), | |
82 | fBias(0.), | |
83 | fTrials(0), | |
84 | fDeltaPt(0.01), | |
85 | fDecayer(0) | |
b22ee262 | 86 | { |
87 | // Constructor using number of particles parameterisation id and library | |
8b31bfac | 88 | fName = "Param"; |
89 | fTitle= "Particle Generator using pT and y parameterisation"; | |
34f60c01 | 90 | fAnalog = kAnalog; |
b22ee262 | 91 | SetForceDecay(); |
fe4da5cc | 92 | } |
fe4da5cc | 93 | //____________________________________________________________ |
1c56e311 | 94 | AliGenParam::AliGenParam(Int_t npart, Int_t param, const char* tname, const char* name): |
95 | AliGenMC(npart), | |
96 | fPtParaFunc(0), | |
97 | fYParaFunc (0), | |
98 | fIpParaFunc(0), | |
99 | fPtPara(0), | |
100 | fYPara(0), | |
101 | fParam(param), | |
102 | fdNdy0(0.), | |
103 | fYWgt(0.), | |
104 | fPtWgt(0.), | |
105 | fBias(0.), | |
106 | fTrials(0), | |
107 | fDeltaPt(0.01), | |
108 | fDecayer(0) | |
fe4da5cc | 109 | { |
b22ee262 | 110 | // Constructor using parameterisation id and number of particles |
8b31bfac | 111 | // |
1c56e311 | 112 | fName = name; |
113 | fTitle= "Particle Generator using pT and y parameterisation"; | |
8b31bfac | 114 | |
675e9664 | 115 | AliGenLib* pLibrary = new AliGenMUONlib(); |
675e9664 | 116 | fPtParaFunc = pLibrary->GetPt(param, tname); |
117 | fYParaFunc = pLibrary->GetY (param, tname); | |
118 | fIpParaFunc = pLibrary->GetIp(param, tname); | |
b22ee262 | 119 | |
34f60c01 | 120 | fAnalog = kAnalog; |
b22ee262 | 121 | fChildSelect.Set(5); |
122 | for (Int_t i=0; i<5; i++) fChildSelect[i]=0; | |
123 | SetForceDecay(); | |
124 | SetCutOnChild(); | |
125 | SetChildMomentumRange(); | |
126 | SetChildPtRange(); | |
127 | SetChildPhiRange(); | |
128 | SetChildThetaRange(); | |
fe4da5cc | 129 | } |
2ad38d56 | 130 | //____________________________________________________________ |
fe4da5cc | 131 | |
34f60c01 | 132 | AliGenParam::AliGenParam(Int_t npart, Int_t param, |
886b6f73 | 133 | Double_t (*PtPara) (Double_t*, Double_t*), |
134 | Double_t (*YPara ) (Double_t* ,Double_t*), | |
65fb704d | 135 | Int_t (*IpPara) (TRandom *)) |
1c56e311 | 136 | :AliGenMC(npart), |
137 | ||
138 | fPtParaFunc(PtPara), | |
139 | fYParaFunc(YPara), | |
140 | fIpParaFunc(IpPara), | |
141 | fPtPara(0), | |
142 | fYPara(0), | |
143 | fParam(param), | |
144 | fdNdy0(0.), | |
145 | fYWgt(0.), | |
146 | fPtWgt(0.), | |
147 | fBias(0.), | |
148 | fTrials(0), | |
149 | fDeltaPt(0.01), | |
150 | fDecayer(0) | |
886b6f73 | 151 | { |
749070b6 | 152 | // Constructor |
28337bc1 | 153 | // Gines Martinez 1/10/99 |
8b31bfac | 154 | fName = "Param"; |
155 | fTitle= "Particle Generator using pT and y parameterisation"; | |
156 | ||
34f60c01 | 157 | fAnalog = kAnalog; |
886b6f73 | 158 | fChildSelect.Set(5); |
159 | for (Int_t i=0; i<5; i++) fChildSelect[i]=0; | |
160 | SetForceDecay(); | |
161 | SetCutOnChild(); | |
749070b6 | 162 | SetChildMomentumRange(); |
163 | SetChildPtRange(); | |
164 | SetChildPhiRange(); | |
165 | SetChildThetaRange(); | |
886b6f73 | 166 | } |
167 | ||
fe4da5cc | 168 | //____________________________________________________________ |
169 | AliGenParam::~AliGenParam() | |
170 | { | |
749070b6 | 171 | // Destructor |
fe4da5cc | 172 | delete fPtPara; |
173 | delete fYPara; | |
174 | } | |
175 | ||
176 | //____________________________________________________________ | |
177 | void AliGenParam::Init() | |
178 | { | |
749070b6 | 179 | // Initialisation |
fa480368 | 180 | |
2904363f | 181 | if (gMC) fDecayer = gMC->GetDecayer(); |
fe4da5cc | 182 | //Begin_Html |
183 | /* | |
1439f98e | 184 | <img src="picts/AliGenParam.gif"> |
fe4da5cc | 185 | */ |
186 | //End_Html | |
c5c3e4b0 | 187 | char name[256]; |
188 | sprintf(name, "pt-parameterisation for %s", GetName()); | |
189 | ||
2ad38d56 | 190 | if (fPtPara) fPtPara->Delete(); |
c5c3e4b0 | 191 | fPtPara = new TF1(name, fPtParaFunc, fPtMin, fPtMax,0); |
828fff0d | 192 | gROOT->GetListOfFunctions()->Remove(fPtPara); |
749070b6 | 193 | // Set representation precision to 10 MeV |
c5c3e4b0 | 194 | Int_t npx= Int_t((fPtMax - fPtMin) / fDeltaPt); |
749070b6 | 195 | |
196 | fPtPara->SetNpx(npx); | |
c5c3e4b0 | 197 | |
198 | sprintf(name, "y-parameterisation for %s", GetName()); | |
2ad38d56 | 199 | if (fYPara) fYPara->Delete(); |
c5c3e4b0 | 200 | fYPara = new TF1(name, fYParaFunc, fYMin, fYMax, 0); |
828fff0d | 201 | gROOT->GetListOfFunctions()->Remove(fYPara); |
202 | ||
749070b6 | 203 | |
c5c3e4b0 | 204 | sprintf(name, "pt-for-%s", GetName()); |
205 | TF1 ptPara(name ,fPtParaFunc, 0, 15, 0); | |
206 | sprintf(name, "y-for-%s", GetName()); | |
207 | TF1 yPara(name, fYParaFunc, -6, 6, 0); | |
b7601ac4 | 208 | |
fe4da5cc | 209 | // |
210 | // dN/dy| y=0 | |
749070b6 | 211 | Double_t y1=0; |
212 | Double_t y2=0; | |
213 | ||
214 | fdNdy0=fYParaFunc(&y1,&y2); | |
fe4da5cc | 215 | // |
216 | // Integral over generation region | |
389a9124 | 217 | Float_t intYS = yPara.Integral(fYMin, fYMax,(Double_t*) 0x0,1.e-6); |
218 | Float_t intPt0 = ptPara.Integral(0,15,(Double_t *) 0x0,1.e-6); | |
219 | Float_t intPtS = ptPara.Integral(fPtMin,fPtMax,(Double_t*) 0x0,1.e-6); | |
749070b6 | 220 | Float_t phiWgt=(fPhiMax-fPhiMin)/2./TMath::Pi(); |
34f60c01 | 221 | if (fAnalog == kAnalog) { |
749070b6 | 222 | fYWgt = intYS/fdNdy0; |
223 | fPtWgt = intPtS/intPt0; | |
224 | fParentWeight = fYWgt*fPtWgt*phiWgt/fNpart; | |
225 | } else { | |
226 | fYWgt = intYS/fdNdy0; | |
227 | fPtWgt = (fPtMax-fPtMin)/intPt0; | |
228 | fParentWeight = fYWgt*fPtWgt*phiWgt/fNpart; | |
229 | } | |
fe4da5cc | 230 | // |
231 | // particle decay related initialization | |
00d6ce7d | 232 | fDecayer->SetForceDecay(fForceDecay); |
fa480368 | 233 | fDecayer->Init(); |
00d6ce7d | 234 | |
fe4da5cc | 235 | // |
fff02fee | 236 | AliGenMC::Init(); |
fe4da5cc | 237 | } |
238 | ||
239 | //____________________________________________________________ | |
240 | void AliGenParam::Generate() | |
241 | { | |
28337bc1 | 242 | // |
243 | // Generate 'npart' of light and heavy mesons (J/Psi, upsilon or phi, Pion, | |
244 | // Kaons, Etas, Omegas) and Baryons (proton, antiprotons, neutrons and | |
245 | // antineutrons in the the desired theta, phi and momentum windows; | |
246 | // Gaussian smearing on the vertex is done if selected. | |
cc5d764c | 247 | // The decay of heavy mesons is done using lujet, |
248 | // and the childern particle are tracked by GEANT | |
249 | // However, light mesons are directly tracked by GEANT | |
250 | // setting fForceDecay = nodecay (SetForceDecay(nodecay)) | |
28337bc1 | 251 | // |
771bbe45 | 252 | // |
253 | // Reinitialize decayer | |
2ad38d56 | 254 | fDecayer->SetForceDecay(fForceDecay); |
255 | fDecayer->Init(); | |
256 | ||
771bbe45 | 257 | // |
28337bc1 | 258 | Float_t polar[3]= {0,0,0}; // Polarisation of the parent particle (for GEANT tracking) |
259 | Float_t origin0[3]; // Origin of the generated parent particle (for GEANT tracking) | |
260 | Float_t pt, pl, ptot; // Transverse, logitudinal and total momenta of the parent particle | |
261 | Float_t phi, theta; // Phi and theta spherical angles of the parent particle momentum | |
262 | Float_t p[3], pc[3], | |
fff02fee | 263 | och[3]; // Momentum, polarisation and origin of the children particles from lujet |
2d7a47be | 264 | Double_t ty, xmt; |
fff02fee | 265 | Int_t nt, i, j; |
fe4da5cc | 266 | Float_t wgtp, wgtch; |
267 | Double_t dummy; | |
09fd3ea2 | 268 | static TClonesArray *particles; |
fe4da5cc | 269 | // |
fff02fee | 270 | if(!particles) particles = new TClonesArray("TParticle",1000); |
8b31bfac | 271 | |
349be858 | 272 | TDatabasePDG *pDataBase = TDatabasePDG::Instance(); |
fe4da5cc | 273 | // |
274 | Float_t random[6]; | |
28337bc1 | 275 | |
276 | // Calculating vertex position per event | |
fe4da5cc | 277 | for (j=0;j<3;j++) origin0[j]=fOrigin[j]; |
aee8290b | 278 | if(fVertexSmear==kPerEvent) { |
d9ea0e3b | 279 | Vertex(); |
280 | for (j=0;j<3;j++) origin0[j]=fVertex[j]; | |
fe4da5cc | 281 | } |
d9ea0e3b | 282 | |
21aaa175 | 283 | Int_t ipa=0; |
fff02fee | 284 | |
28337bc1 | 285 | // Generating fNpart particles |
21aaa175 | 286 | while (ipa<fNpart) { |
cc5d764c | 287 | while(1) { |
fe4da5cc | 288 | // |
2ad38d56 | 289 | // particle type |
65fb704d | 290 | Int_t iPart = fIpParaFunc(fRandom); |
fa480368 | 291 | fChildWeight=(fDecayer->GetPartialBranchingRatio(iPart))*fParentWeight; |
675e9664 | 292 | TParticlePDG *particle = pDataBase->GetParticle(iPart); |
fa480368 | 293 | Float_t am = particle->Mass(); |
8b31bfac | 294 | |
65fb704d | 295 | Rndm(random,2); |
fe4da5cc | 296 | // |
297 | // phi | |
298 | phi=fPhiMin+random[0]*(fPhiMax-fPhiMin); | |
299 | // | |
300 | // y | |
2d7a47be | 301 | ty = TMath::TanH(fYPara->GetRandom()); |
fe4da5cc | 302 | // |
303 | // pT | |
34f60c01 | 304 | if (fAnalog == kAnalog) { |
fe4da5cc | 305 | pt=fPtPara->GetRandom(); |
306 | wgtp=fParentWeight; | |
307 | wgtch=fChildWeight; | |
308 | } else { | |
309 | pt=fPtMin+random[1]*(fPtMax-fPtMin); | |
310 | Double_t ptd=pt; | |
311 | wgtp=fParentWeight*fPtParaFunc(& ptd, &dummy); | |
312 | wgtch=fChildWeight*fPtParaFunc(& ptd, &dummy); | |
313 | } | |
314 | xmt=sqrt(pt*pt+am*am); | |
2d7a47be | 315 | if (TMath::Abs(ty)==1.) { |
316 | ty=0.; | |
317 | Fatal("AliGenParam", | |
318 | "Division by 0: Please check you rapidity range !"); | |
319 | } | |
320 | ||
fe4da5cc | 321 | pl=xmt*ty/sqrt(1.-ty*ty); |
322 | theta=TMath::ATan2(pt,pl); | |
cc5d764c | 323 | // Cut on theta |
fe4da5cc | 324 | if(theta<fThetaMin || theta>fThetaMax) continue; |
325 | ptot=TMath::Sqrt(pt*pt+pl*pl); | |
cc5d764c | 326 | // Cut on momentum |
fe4da5cc | 327 | if(ptot<fPMin || ptot>fPMax) continue; |
fff02fee | 328 | // |
fe4da5cc | 329 | p[0]=pt*TMath::Cos(phi); |
330 | p[1]=pt*TMath::Sin(phi); | |
331 | p[2]=pl; | |
aee8290b | 332 | if(fVertexSmear==kPerTrack) { |
65fb704d | 333 | Rndm(random,6); |
fe4da5cc | 334 | for (j=0;j<3;j++) { |
335 | origin0[j]= | |
336 | fOrigin[j]+fOsigma[j]*TMath::Cos(2*random[2*j]*TMath::Pi())* | |
337 | TMath::Sqrt(-2*TMath::Log(random[2*j+1])); | |
338 | } | |
339 | } | |
28337bc1 | 340 | |
341 | // Looking at fForceDecay : | |
cc5d764c | 342 | // if fForceDecay != none Primary particle decays using |
343 | // AliPythia and children are tracked by GEANT | |
28337bc1 | 344 | // |
cc5d764c | 345 | // if fForceDecay == none Primary particle is tracked by GEANT |
346 | // (In the latest, make sure that GEANT actually does all the decays you want) | |
fe4da5cc | 347 | // |
fff02fee | 348 | |
34f60c01 | 349 | if (fForceDecay != kNoDecay) { |
28337bc1 | 350 | // Using lujet to decay particle |
886b6f73 | 351 | Float_t energy=TMath::Sqrt(ptot*ptot+am*am); |
fa480368 | 352 | TLorentzVector pmom(p[0], p[1], p[2], energy); |
353 | fDecayer->Decay(iPart,&pmom); | |
fe4da5cc | 354 | // |
cc5d764c | 355 | // select decay particles |
fa480368 | 356 | Int_t np=fDecayer->ImportParticles(particles); |
1242532d | 357 | |
358 | // Selecting GeometryAcceptance for particles fPdgCodeParticleforAcceptanceCut; | |
359 | if (fGeometryAcceptance) | |
360 | if (!CheckAcceptanceGeometry(np,particles)) continue; | |
886b6f73 | 361 | Int_t ncsel=0; |
fff02fee | 362 | Int_t* pFlag = new Int_t[np]; |
363 | Int_t* pParent = new Int_t[np]; | |
364 | Int_t* pSelected = new Int_t[np]; | |
365 | Int_t* trackIt = new Int_t[np]; | |
366 | ||
367 | for (i=0; i<np; i++) { | |
368 | pFlag[i] = 0; | |
369 | pSelected[i] = 0; | |
370 | pParent[i] = -1; | |
371 | } | |
372 | ||
6ba00c52 | 373 | if (np >1) { |
374 | TParticle* iparticle = (TParticle *) particles->At(0); | |
fff02fee | 375 | Int_t ipF, ipL; |
376 | for (i = 1; i<np ; i++) { | |
377 | trackIt[i] = 1; | |
6ba00c52 | 378 | iparticle = (TParticle *) particles->At(i); |
379 | Int_t kf = iparticle->GetPdgCode(); | |
fff02fee | 380 | Int_t ks = iparticle->GetStatusCode(); |
381 | // flagged particle | |
382 | ||
383 | if (pFlag[i] == 1) { | |
fff02fee | 384 | ipF = iparticle->GetFirstDaughter(); |
385 | ipL = iparticle->GetLastDaughter(); | |
386 | if (ipF > 0) for (j=ipF-1; j<ipL; j++) pFlag[j]=1; | |
387 | continue; | |
388 | } | |
389 | ||
390 | // flag decay products of particles with long life-time (c tau > .3 mum) | |
391 | ||
392 | if (ks != 1) { | |
2d7a47be | 393 | // TParticlePDG *particle = pDataBase->GetParticle(kf); |
fff02fee | 394 | |
395 | Double_t lifeTime = fDecayer->GetLifetime(kf); | |
2d7a47be | 396 | // Double_t mass = particle->Mass(); |
397 | // Double_t width = particle->Width(); | |
47fc6bd5 | 398 | if (lifeTime > (Double_t) fMaxLifeTime) { |
fff02fee | 399 | ipF = iparticle->GetFirstDaughter(); |
400 | ipL = iparticle->GetLastDaughter(); | |
401 | if (ipF > 0) for (j=ipF-1; j<ipL; j++) pFlag[j]=1; | |
402 | } else{ | |
403 | trackIt[i] = 0; | |
404 | pSelected[i] = 1; | |
405 | } | |
406 | } // ks==1 ? | |
fe4da5cc | 407 | // |
408 | // children | |
47fc6bd5 | 409 | |
fff02fee | 410 | if (ChildSelected(TMath::Abs(kf)) || fForceDecay == kAll && trackIt[i]) |
6ba00c52 | 411 | { |
6ba00c52 | 412 | if (fCutOnChild) { |
fff02fee | 413 | pc[0]=iparticle->Px(); |
414 | pc[1]=iparticle->Py(); | |
415 | pc[2]=iparticle->Pz(); | |
416 | Bool_t childok = KinematicSelection(iparticle, 1); | |
417 | if(childok) { | |
418 | pSelected[i] = 1; | |
6ba00c52 | 419 | ncsel++; |
420 | } else { | |
421 | ncsel=-1; | |
422 | break; | |
423 | } // child kine cuts | |
424 | } else { | |
fff02fee | 425 | pSelected[i] = 1; |
886b6f73 | 426 | ncsel++; |
6ba00c52 | 427 | } // if child selection |
428 | } // select muon | |
429 | } // decay particle loop | |
430 | } // if decay products | |
431 | ||
886b6f73 | 432 | Int_t iparent; |
433 | if ((fCutOnChild && ncsel >0) || !fCutOnChild){ | |
434 | ipa++; | |
21aaa175 | 435 | // |
fff02fee | 436 | // Parent |
642f15cf | 437 | PushTrack(0, -1, iPart, p, origin0, polar, 0, kPPrimary, nt, wgtp); |
fff02fee | 438 | pParent[0] = nt; |
a99cf51f | 439 | KeepTrack(nt); |
fff02fee | 440 | // |
441 | // Decay Products | |
442 | // | |
443 | for (i = 1; i < np; i++) { | |
444 | if (pSelected[i]) { | |
445 | TParticle* iparticle = (TParticle *) particles->At(i); | |
446 | Int_t kf = iparticle->GetPdgCode(); | |
447 | Int_t ipa = iparticle->GetFirstMother()-1; | |
448 | ||
449 | och[0] = origin0[0]+iparticle->Vx()/10; | |
450 | och[1] = origin0[1]+iparticle->Vy()/10; | |
451 | och[2] = origin0[2]+iparticle->Vz()/10; | |
452 | pc[0] = iparticle->Px(); | |
453 | pc[1] = iparticle->Py(); | |
454 | pc[2] = iparticle->Pz(); | |
455 | ||
456 | if (ipa > -1) { | |
457 | iparent = pParent[ipa]; | |
458 | } else { | |
459 | iparent = -1; | |
460 | } | |
1242532d | 461 | |
642f15cf | 462 | PushTrack(fTrackIt*trackIt[i], iparent, kf, |
fff02fee | 463 | pc, och, polar, |
464 | 0, kPDecay, nt, wgtch); | |
465 | pParent[i] = nt; | |
a99cf51f | 466 | KeepTrack(nt); |
8b31bfac | 467 | } // Selected |
468 | } // Particle loop | |
28337bc1 | 469 | } // Decays by Lujet |
8b31bfac | 470 | particles->Clear(); |
fff02fee | 471 | if (pFlag) delete[] pFlag; |
472 | if (pParent) delete[] pParent; | |
473 | if (pSelected) delete[] pSelected; | |
8b31bfac | 474 | if (trackIt) delete[] trackIt; |
21aaa175 | 475 | } // kinematic selection |
28337bc1 | 476 | else // nodecay option, so parent will be tracked by GEANT (pions, kaons, eta, omegas, baryons) |
477 | { | |
5d12ce38 | 478 | gAlice->GetMCApp()-> |
642f15cf | 479 | PushTrack(fTrackIt,-1,iPart,p,origin0,polar,0,kPPrimary,nt,wgtp); |
28337bc1 | 480 | ipa++; |
481 | } | |
fe4da5cc | 482 | break; |
21aaa175 | 483 | } // while |
fe4da5cc | 484 | } // event loop |
a99cf51f | 485 | SetHighWaterMark(nt); |
fe4da5cc | 486 | } |
2ad38d56 | 487 | //____________________________________________________________________________________ |
488 | Float_t AliGenParam::GetRelativeArea(Float_t ptMin, Float_t ptMax, Float_t yMin, Float_t yMax, Float_t phiMin, Float_t phiMax) | |
489 | { | |
490 | // | |
491 | // Normalisation for selected kinematic region | |
492 | // | |
493 | Float_t ratio = | |
389a9124 | 494 | fPtPara->Integral(ptMin,ptMax,(Double_t *)0,1.e-6) / fPtPara->Integral( fPtPara->GetXmin(), fPtPara->GetXmax(),(Double_t *)0,1.e-6) * |
495 | fYPara->Integral(yMin,yMax,(Double_t *)0,1.e-6)/fYPara->Integral(fYPara->GetXmin(),fYPara->GetXmax(),(Double_t *)0,1.e-6) * | |
2ad38d56 | 496 | (phiMax-phiMin)/360.; |
497 | return TMath::Abs(ratio); | |
498 | } | |
499 | ||
500 | //____________________________________________________________________________________ | |
fe4da5cc | 501 | |
dc1d768c | 502 | void AliGenParam::Draw( const char * /*opt*/) |
5bd39445 | 503 | { |
504 | // | |
505 | // Draw the pT and y Distributions | |
506 | // | |
507 | TCanvas *c0 = new TCanvas("c0","Canvas 0",400,10,600,700); | |
508 | c0->Divide(2,1); | |
509 | c0->cd(1); | |
510 | fPtPara->Draw(); | |
511 | fPtPara->GetHistogram()->SetXTitle("p_{T} (GeV)"); | |
512 | c0->cd(2); | |
513 | fYPara->Draw(); | |
514 | fYPara->GetHistogram()->SetXTitle("y"); | |
515 | } | |
516 | ||
f87cfe57 | 517 | |
fe4da5cc | 518 | |
519 |