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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 | //____________________________________________________________ |
52 | AliGenParam::AliGenParam() | |
fe4da5cc | 53 | { |
b22ee262 | 54 | // Deafault constructor |
55 | fPtPara = 0; | |
56 | fYPara = 0; | |
34f60c01 | 57 | fParam = 0; |
58 | fAnalog = kAnalog; | |
b22ee262 | 59 | SetDeltaPt(); |
2685bf00 | 60 | fDecayer = 0; |
8b31bfac | 61 | |
62 | ||
b22ee262 | 63 | } |
2ad38d56 | 64 | //____________________________________________________________ |
fff02fee | 65 | AliGenParam::AliGenParam(Int_t npart, AliGenLib * Library, Int_t param, char* tname):AliGenMC(npart) |
b22ee262 | 66 | { |
67 | // Constructor using number of particles parameterisation id and library | |
8b31bfac | 68 | fName = "Param"; |
69 | fTitle= "Particle Generator using pT and y parameterisation"; | |
b22ee262 | 70 | |
71 | fPtParaFunc = Library->GetPt(param, tname); | |
72 | fYParaFunc = Library->GetY (param, tname); | |
73 | fIpParaFunc = Library->GetIp(param, tname); | |
74 | ||
75 | fPtPara = 0; | |
76 | fYPara = 0; | |
77 | fParam = param; | |
34f60c01 | 78 | fAnalog = kAnalog; |
b22ee262 | 79 | SetForceDecay(); |
b22ee262 | 80 | SetDeltaPt(); |
fe4da5cc | 81 | } |
fe4da5cc | 82 | //____________________________________________________________ |
2ad38d56 | 83 | AliGenParam::AliGenParam(Int_t npart, Int_t param, const char* tname, const char* name):AliGenMC(npart) |
fe4da5cc | 84 | { |
b22ee262 | 85 | // Constructor using parameterisation id and number of particles |
8b31bfac | 86 | // |
2ad38d56 | 87 | fName = name; |
88 | fTitle= "Particle Generator using pT and y parameterisation"; | |
8b31bfac | 89 | |
675e9664 | 90 | AliGenLib* pLibrary = new AliGenMUONlib(); |
b22ee262 | 91 | |
675e9664 | 92 | fPtParaFunc = pLibrary->GetPt(param, tname); |
93 | fYParaFunc = pLibrary->GetY (param, tname); | |
94 | fIpParaFunc = pLibrary->GetIp(param, tname); | |
b22ee262 | 95 | |
96 | fPtPara = 0; | |
97 | fYPara = 0; | |
98 | fParam = param; | |
34f60c01 | 99 | fAnalog = kAnalog; |
b22ee262 | 100 | fChildSelect.Set(5); |
101 | for (Int_t i=0; i<5; i++) fChildSelect[i]=0; | |
102 | SetForceDecay(); | |
103 | SetCutOnChild(); | |
104 | SetChildMomentumRange(); | |
105 | SetChildPtRange(); | |
106 | SetChildPhiRange(); | |
107 | SetChildThetaRange(); | |
108 | SetDeltaPt(); | |
fe4da5cc | 109 | } |
2ad38d56 | 110 | //____________________________________________________________ |
fe4da5cc | 111 | |
34f60c01 | 112 | AliGenParam::AliGenParam(Int_t npart, Int_t param, |
886b6f73 | 113 | Double_t (*PtPara) (Double_t*, Double_t*), |
114 | Double_t (*YPara ) (Double_t* ,Double_t*), | |
65fb704d | 115 | Int_t (*IpPara) (TRandom *)) |
fff02fee | 116 | :AliGenMC(npart) |
886b6f73 | 117 | { |
749070b6 | 118 | // Constructor |
28337bc1 | 119 | // Gines Martinez 1/10/99 |
8b31bfac | 120 | fName = "Param"; |
121 | fTitle= "Particle Generator using pT and y parameterisation"; | |
122 | ||
886b6f73 | 123 | fPtParaFunc = PtPara; |
124 | fYParaFunc = YPara; | |
125 | fIpParaFunc = IpPara; | |
28337bc1 | 126 | // |
886b6f73 | 127 | fPtPara = 0; |
128 | fYPara = 0; | |
129 | fParam = param; | |
34f60c01 | 130 | fAnalog = kAnalog; |
886b6f73 | 131 | fChildSelect.Set(5); |
132 | for (Int_t i=0; i<5; i++) fChildSelect[i]=0; | |
133 | SetForceDecay(); | |
134 | SetCutOnChild(); | |
749070b6 | 135 | SetChildMomentumRange(); |
136 | SetChildPtRange(); | |
137 | SetChildPhiRange(); | |
138 | SetChildThetaRange(); | |
139 | SetDeltaPt(); | |
886b6f73 | 140 | } |
141 | ||
f87cfe57 | 142 | |
6d4dd317 | 143 | AliGenParam::AliGenParam(const AliGenParam & Param) |
198bb1c7 | 144 | :AliGenMC(Param) |
f87cfe57 | 145 | { |
198bb1c7 | 146 | // Copy constructor |
6d4dd317 | 147 | Param.Copy(*this); |
f87cfe57 | 148 | } |
149 | ||
fe4da5cc | 150 | //____________________________________________________________ |
151 | AliGenParam::~AliGenParam() | |
152 | { | |
749070b6 | 153 | // Destructor |
fe4da5cc | 154 | delete fPtPara; |
155 | delete fYPara; | |
156 | } | |
157 | ||
158 | //____________________________________________________________ | |
159 | void AliGenParam::Init() | |
160 | { | |
749070b6 | 161 | // Initialisation |
fa480368 | 162 | |
2904363f | 163 | if (gMC) fDecayer = gMC->GetDecayer(); |
fe4da5cc | 164 | //Begin_Html |
165 | /* | |
1439f98e | 166 | <img src="picts/AliGenParam.gif"> |
fe4da5cc | 167 | */ |
168 | //End_Html | |
c5c3e4b0 | 169 | char name[256]; |
170 | sprintf(name, "pt-parameterisation for %s", GetName()); | |
171 | ||
2ad38d56 | 172 | if (fPtPara) fPtPara->Delete(); |
c5c3e4b0 | 173 | fPtPara = new TF1(name, fPtParaFunc, fPtMin, fPtMax,0); |
828fff0d | 174 | gROOT->GetListOfFunctions()->Remove(fPtPara); |
749070b6 | 175 | // Set representation precision to 10 MeV |
c5c3e4b0 | 176 | Int_t npx= Int_t((fPtMax - fPtMin) / fDeltaPt); |
749070b6 | 177 | |
178 | fPtPara->SetNpx(npx); | |
c5c3e4b0 | 179 | |
180 | sprintf(name, "y-parameterisation for %s", GetName()); | |
2ad38d56 | 181 | if (fYPara) fYPara->Delete(); |
c5c3e4b0 | 182 | fYPara = new TF1(name, fYParaFunc, fYMin, fYMax, 0); |
828fff0d | 183 | gROOT->GetListOfFunctions()->Remove(fYPara); |
184 | ||
749070b6 | 185 | |
c5c3e4b0 | 186 | sprintf(name, "pt-for-%s", GetName()); |
187 | TF1 ptPara(name ,fPtParaFunc, 0, 15, 0); | |
188 | sprintf(name, "y-for-%s", GetName()); | |
189 | TF1 yPara(name, fYParaFunc, -6, 6, 0); | |
b7601ac4 | 190 | |
fe4da5cc | 191 | // |
192 | // dN/dy| y=0 | |
749070b6 | 193 | Double_t y1=0; |
194 | Double_t y2=0; | |
195 | ||
196 | fdNdy0=fYParaFunc(&y1,&y2); | |
fe4da5cc | 197 | // |
198 | // Integral over generation region | |
389a9124 | 199 | Float_t intYS = yPara.Integral(fYMin, fYMax,(Double_t*) 0x0,1.e-6); |
200 | Float_t intPt0 = ptPara.Integral(0,15,(Double_t *) 0x0,1.e-6); | |
201 | Float_t intPtS = ptPara.Integral(fPtMin,fPtMax,(Double_t*) 0x0,1.e-6); | |
749070b6 | 202 | Float_t phiWgt=(fPhiMax-fPhiMin)/2./TMath::Pi(); |
34f60c01 | 203 | if (fAnalog == kAnalog) { |
749070b6 | 204 | fYWgt = intYS/fdNdy0; |
205 | fPtWgt = intPtS/intPt0; | |
206 | fParentWeight = fYWgt*fPtWgt*phiWgt/fNpart; | |
207 | } else { | |
208 | fYWgt = intYS/fdNdy0; | |
209 | fPtWgt = (fPtMax-fPtMin)/intPt0; | |
210 | fParentWeight = fYWgt*fPtWgt*phiWgt/fNpart; | |
211 | } | |
fe4da5cc | 212 | // |
213 | // particle decay related initialization | |
00d6ce7d | 214 | fDecayer->SetForceDecay(fForceDecay); |
fa480368 | 215 | fDecayer->Init(); |
00d6ce7d | 216 | |
fe4da5cc | 217 | // |
fff02fee | 218 | AliGenMC::Init(); |
fe4da5cc | 219 | } |
220 | ||
221 | //____________________________________________________________ | |
222 | void AliGenParam::Generate() | |
223 | { | |
28337bc1 | 224 | // |
225 | // Generate 'npart' of light and heavy mesons (J/Psi, upsilon or phi, Pion, | |
226 | // Kaons, Etas, Omegas) and Baryons (proton, antiprotons, neutrons and | |
227 | // antineutrons in the the desired theta, phi and momentum windows; | |
228 | // Gaussian smearing on the vertex is done if selected. | |
cc5d764c | 229 | // The decay of heavy mesons is done using lujet, |
230 | // and the childern particle are tracked by GEANT | |
231 | // However, light mesons are directly tracked by GEANT | |
232 | // setting fForceDecay = nodecay (SetForceDecay(nodecay)) | |
28337bc1 | 233 | // |
771bbe45 | 234 | // |
235 | // Reinitialize decayer | |
2ad38d56 | 236 | fDecayer->SetForceDecay(fForceDecay); |
237 | fDecayer->Init(); | |
238 | ||
771bbe45 | 239 | // |
28337bc1 | 240 | Float_t polar[3]= {0,0,0}; // Polarisation of the parent particle (for GEANT tracking) |
241 | Float_t origin0[3]; // Origin of the generated parent particle (for GEANT tracking) | |
242 | Float_t pt, pl, ptot; // Transverse, logitudinal and total momenta of the parent particle | |
243 | Float_t phi, theta; // Phi and theta spherical angles of the parent particle momentum | |
244 | Float_t p[3], pc[3], | |
fff02fee | 245 | och[3]; // Momentum, polarisation and origin of the children particles from lujet |
2d7a47be | 246 | Double_t ty, xmt; |
fff02fee | 247 | Int_t nt, i, j; |
fe4da5cc | 248 | Float_t wgtp, wgtch; |
249 | Double_t dummy; | |
09fd3ea2 | 250 | static TClonesArray *particles; |
fe4da5cc | 251 | // |
fff02fee | 252 | if(!particles) particles = new TClonesArray("TParticle",1000); |
8b31bfac | 253 | |
349be858 | 254 | TDatabasePDG *pDataBase = TDatabasePDG::Instance(); |
fe4da5cc | 255 | // |
256 | Float_t random[6]; | |
28337bc1 | 257 | |
258 | // Calculating vertex position per event | |
fe4da5cc | 259 | for (j=0;j<3;j++) origin0[j]=fOrigin[j]; |
aee8290b | 260 | if(fVertexSmear==kPerEvent) { |
d9ea0e3b | 261 | Vertex(); |
262 | for (j=0;j<3;j++) origin0[j]=fVertex[j]; | |
fe4da5cc | 263 | } |
d9ea0e3b | 264 | |
21aaa175 | 265 | Int_t ipa=0; |
fff02fee | 266 | |
28337bc1 | 267 | // Generating fNpart particles |
21aaa175 | 268 | while (ipa<fNpart) { |
cc5d764c | 269 | while(1) { |
fe4da5cc | 270 | // |
2ad38d56 | 271 | // particle type |
65fb704d | 272 | Int_t iPart = fIpParaFunc(fRandom); |
fa480368 | 273 | fChildWeight=(fDecayer->GetPartialBranchingRatio(iPart))*fParentWeight; |
675e9664 | 274 | TParticlePDG *particle = pDataBase->GetParticle(iPart); |
fa480368 | 275 | Float_t am = particle->Mass(); |
8b31bfac | 276 | |
65fb704d | 277 | Rndm(random,2); |
fe4da5cc | 278 | // |
279 | // phi | |
280 | phi=fPhiMin+random[0]*(fPhiMax-fPhiMin); | |
281 | // | |
282 | // y | |
2d7a47be | 283 | ty = TMath::TanH(fYPara->GetRandom()); |
fe4da5cc | 284 | // |
285 | // pT | |
34f60c01 | 286 | if (fAnalog == kAnalog) { |
fe4da5cc | 287 | pt=fPtPara->GetRandom(); |
288 | wgtp=fParentWeight; | |
289 | wgtch=fChildWeight; | |
290 | } else { | |
291 | pt=fPtMin+random[1]*(fPtMax-fPtMin); | |
292 | Double_t ptd=pt; | |
293 | wgtp=fParentWeight*fPtParaFunc(& ptd, &dummy); | |
294 | wgtch=fChildWeight*fPtParaFunc(& ptd, &dummy); | |
295 | } | |
296 | xmt=sqrt(pt*pt+am*am); | |
2d7a47be | 297 | if (TMath::Abs(ty)==1.) { |
298 | ty=0.; | |
299 | Fatal("AliGenParam", | |
300 | "Division by 0: Please check you rapidity range !"); | |
301 | } | |
302 | ||
fe4da5cc | 303 | pl=xmt*ty/sqrt(1.-ty*ty); |
304 | theta=TMath::ATan2(pt,pl); | |
cc5d764c | 305 | // Cut on theta |
fe4da5cc | 306 | if(theta<fThetaMin || theta>fThetaMax) continue; |
307 | ptot=TMath::Sqrt(pt*pt+pl*pl); | |
cc5d764c | 308 | // Cut on momentum |
fe4da5cc | 309 | if(ptot<fPMin || ptot>fPMax) continue; |
fff02fee | 310 | // |
fe4da5cc | 311 | p[0]=pt*TMath::Cos(phi); |
312 | p[1]=pt*TMath::Sin(phi); | |
313 | p[2]=pl; | |
aee8290b | 314 | if(fVertexSmear==kPerTrack) { |
65fb704d | 315 | Rndm(random,6); |
fe4da5cc | 316 | for (j=0;j<3;j++) { |
317 | origin0[j]= | |
318 | fOrigin[j]+fOsigma[j]*TMath::Cos(2*random[2*j]*TMath::Pi())* | |
319 | TMath::Sqrt(-2*TMath::Log(random[2*j+1])); | |
320 | } | |
321 | } | |
28337bc1 | 322 | |
323 | // Looking at fForceDecay : | |
cc5d764c | 324 | // if fForceDecay != none Primary particle decays using |
325 | // AliPythia and children are tracked by GEANT | |
28337bc1 | 326 | // |
cc5d764c | 327 | // if fForceDecay == none Primary particle is tracked by GEANT |
328 | // (In the latest, make sure that GEANT actually does all the decays you want) | |
fe4da5cc | 329 | // |
fff02fee | 330 | |
34f60c01 | 331 | if (fForceDecay != kNoDecay) { |
28337bc1 | 332 | // Using lujet to decay particle |
886b6f73 | 333 | Float_t energy=TMath::Sqrt(ptot*ptot+am*am); |
fa480368 | 334 | TLorentzVector pmom(p[0], p[1], p[2], energy); |
335 | fDecayer->Decay(iPart,&pmom); | |
fe4da5cc | 336 | // |
cc5d764c | 337 | // select decay particles |
fa480368 | 338 | Int_t np=fDecayer->ImportParticles(particles); |
1242532d | 339 | |
340 | // Selecting GeometryAcceptance for particles fPdgCodeParticleforAcceptanceCut; | |
341 | if (fGeometryAcceptance) | |
342 | if (!CheckAcceptanceGeometry(np,particles)) continue; | |
886b6f73 | 343 | Int_t ncsel=0; |
fff02fee | 344 | Int_t* pFlag = new Int_t[np]; |
345 | Int_t* pParent = new Int_t[np]; | |
346 | Int_t* pSelected = new Int_t[np]; | |
347 | Int_t* trackIt = new Int_t[np]; | |
348 | ||
349 | for (i=0; i<np; i++) { | |
350 | pFlag[i] = 0; | |
351 | pSelected[i] = 0; | |
352 | pParent[i] = -1; | |
353 | } | |
354 | ||
6ba00c52 | 355 | if (np >1) { |
356 | TParticle* iparticle = (TParticle *) particles->At(0); | |
fff02fee | 357 | Int_t ipF, ipL; |
358 | for (i = 1; i<np ; i++) { | |
359 | trackIt[i] = 1; | |
6ba00c52 | 360 | iparticle = (TParticle *) particles->At(i); |
361 | Int_t kf = iparticle->GetPdgCode(); | |
fff02fee | 362 | Int_t ks = iparticle->GetStatusCode(); |
363 | // flagged particle | |
364 | ||
365 | if (pFlag[i] == 1) { | |
fff02fee | 366 | ipF = iparticle->GetFirstDaughter(); |
367 | ipL = iparticle->GetLastDaughter(); | |
368 | if (ipF > 0) for (j=ipF-1; j<ipL; j++) pFlag[j]=1; | |
369 | continue; | |
370 | } | |
371 | ||
372 | // flag decay products of particles with long life-time (c tau > .3 mum) | |
373 | ||
374 | if (ks != 1) { | |
2d7a47be | 375 | // TParticlePDG *particle = pDataBase->GetParticle(kf); |
fff02fee | 376 | |
377 | Double_t lifeTime = fDecayer->GetLifetime(kf); | |
2d7a47be | 378 | // Double_t mass = particle->Mass(); |
379 | // Double_t width = particle->Width(); | |
47fc6bd5 | 380 | if (lifeTime > (Double_t) fMaxLifeTime) { |
fff02fee | 381 | ipF = iparticle->GetFirstDaughter(); |
382 | ipL = iparticle->GetLastDaughter(); | |
383 | if (ipF > 0) for (j=ipF-1; j<ipL; j++) pFlag[j]=1; | |
384 | } else{ | |
385 | trackIt[i] = 0; | |
386 | pSelected[i] = 1; | |
387 | } | |
388 | } // ks==1 ? | |
fe4da5cc | 389 | // |
390 | // children | |
47fc6bd5 | 391 | |
fff02fee | 392 | if (ChildSelected(TMath::Abs(kf)) || fForceDecay == kAll && trackIt[i]) |
6ba00c52 | 393 | { |
6ba00c52 | 394 | if (fCutOnChild) { |
fff02fee | 395 | pc[0]=iparticle->Px(); |
396 | pc[1]=iparticle->Py(); | |
397 | pc[2]=iparticle->Pz(); | |
398 | Bool_t childok = KinematicSelection(iparticle, 1); | |
399 | if(childok) { | |
400 | pSelected[i] = 1; | |
6ba00c52 | 401 | ncsel++; |
402 | } else { | |
403 | ncsel=-1; | |
404 | break; | |
405 | } // child kine cuts | |
406 | } else { | |
fff02fee | 407 | pSelected[i] = 1; |
886b6f73 | 408 | ncsel++; |
6ba00c52 | 409 | } // if child selection |
410 | } // select muon | |
411 | } // decay particle loop | |
412 | } // if decay products | |
413 | ||
886b6f73 | 414 | Int_t iparent; |
415 | if ((fCutOnChild && ncsel >0) || !fCutOnChild){ | |
416 | ipa++; | |
21aaa175 | 417 | // |
fff02fee | 418 | // Parent |
642f15cf | 419 | PushTrack(0, -1, iPart, p, origin0, polar, 0, kPPrimary, nt, wgtp); |
fff02fee | 420 | pParent[0] = nt; |
a99cf51f | 421 | KeepTrack(nt); |
fff02fee | 422 | // |
423 | // Decay Products | |
424 | // | |
425 | for (i = 1; i < np; i++) { | |
426 | if (pSelected[i]) { | |
427 | TParticle* iparticle = (TParticle *) particles->At(i); | |
428 | Int_t kf = iparticle->GetPdgCode(); | |
429 | Int_t ipa = iparticle->GetFirstMother()-1; | |
430 | ||
431 | och[0] = origin0[0]+iparticle->Vx()/10; | |
432 | och[1] = origin0[1]+iparticle->Vy()/10; | |
433 | och[2] = origin0[2]+iparticle->Vz()/10; | |
434 | pc[0] = iparticle->Px(); | |
435 | pc[1] = iparticle->Py(); | |
436 | pc[2] = iparticle->Pz(); | |
437 | ||
438 | if (ipa > -1) { | |
439 | iparent = pParent[ipa]; | |
440 | } else { | |
441 | iparent = -1; | |
442 | } | |
1242532d | 443 | |
642f15cf | 444 | PushTrack(fTrackIt*trackIt[i], iparent, kf, |
fff02fee | 445 | pc, och, polar, |
446 | 0, kPDecay, nt, wgtch); | |
447 | pParent[i] = nt; | |
a99cf51f | 448 | KeepTrack(nt); |
8b31bfac | 449 | } // Selected |
450 | } // Particle loop | |
28337bc1 | 451 | } // Decays by Lujet |
8b31bfac | 452 | particles->Clear(); |
fff02fee | 453 | if (pFlag) delete[] pFlag; |
454 | if (pParent) delete[] pParent; | |
455 | if (pSelected) delete[] pSelected; | |
8b31bfac | 456 | if (trackIt) delete[] trackIt; |
21aaa175 | 457 | } // kinematic selection |
28337bc1 | 458 | else // nodecay option, so parent will be tracked by GEANT (pions, kaons, eta, omegas, baryons) |
459 | { | |
5d12ce38 | 460 | gAlice->GetMCApp()-> |
642f15cf | 461 | PushTrack(fTrackIt,-1,iPart,p,origin0,polar,0,kPPrimary,nt,wgtp); |
28337bc1 | 462 | ipa++; |
463 | } | |
fe4da5cc | 464 | break; |
21aaa175 | 465 | } // while |
fe4da5cc | 466 | } // event loop |
a99cf51f | 467 | SetHighWaterMark(nt); |
fe4da5cc | 468 | } |
2ad38d56 | 469 | //____________________________________________________________________________________ |
470 | Float_t AliGenParam::GetRelativeArea(Float_t ptMin, Float_t ptMax, Float_t yMin, Float_t yMax, Float_t phiMin, Float_t phiMax) | |
471 | { | |
472 | // | |
473 | // Normalisation for selected kinematic region | |
474 | // | |
475 | Float_t ratio = | |
389a9124 | 476 | fPtPara->Integral(ptMin,ptMax,(Double_t *)0,1.e-6) / fPtPara->Integral( fPtPara->GetXmin(), fPtPara->GetXmax(),(Double_t *)0,1.e-6) * |
477 | fYPara->Integral(yMin,yMax,(Double_t *)0,1.e-6)/fYPara->Integral(fYPara->GetXmin(),fYPara->GetXmax(),(Double_t *)0,1.e-6) * | |
2ad38d56 | 478 | (phiMax-phiMin)/360.; |
479 | return TMath::Abs(ratio); | |
480 | } | |
481 | ||
482 | //____________________________________________________________________________________ | |
fe4da5cc | 483 | |
dc1d768c | 484 | void AliGenParam::Draw( const char * /*opt*/) |
5bd39445 | 485 | { |
486 | // | |
487 | // Draw the pT and y Distributions | |
488 | // | |
489 | TCanvas *c0 = new TCanvas("c0","Canvas 0",400,10,600,700); | |
490 | c0->Divide(2,1); | |
491 | c0->cd(1); | |
492 | fPtPara->Draw(); | |
493 | fPtPara->GetHistogram()->SetXTitle("p_{T} (GeV)"); | |
494 | c0->cd(2); | |
495 | fYPara->Draw(); | |
496 | fYPara->GetHistogram()->SetXTitle("y"); | |
497 | } | |
498 | ||
f87cfe57 | 499 | AliGenParam& AliGenParam::operator=(const AliGenParam& rhs) |
500 | { | |
501 | // Assignment operator | |
198bb1c7 | 502 | rhs.Copy(*this); |
f87cfe57 | 503 | return *this; |
504 | } | |
505 | ||
fe4da5cc | 506 | |
507 |