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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 | $Log$ | |
d9ea0e3b | 18 | Revision 1.26 2000/12/21 16:24:06 morsch |
19 | Coding convention clean-up | |
20 | ||
675e9664 | 21 | Revision 1.25 2000/11/30 07:12:50 alibrary |
22 | Introducing new Rndm and QA classes | |
23 | ||
65fb704d | 24 | Revision 1.24 2000/10/18 19:11:27 hristov |
25 | Division by zero fixed | |
26 | ||
919c2096 | 27 | Revision 1.23 2000/10/02 21:28:06 fca |
28 | Removal of useless dependecies via forward declarations | |
29 | ||
94de3818 | 30 | Revision 1.22 2000/09/12 14:14:55 morsch |
31 | Call fDecayer->ForceDecay() at the beginning of Generate(). | |
32 | ||
00d6ce7d | 33 | Revision 1.21 2000/09/08 15:39:01 morsch |
34 | Handle the case fForceDecay=all during the generation, i.e. select all secondaries. | |
35 | ||
5ab0acc9 | 36 | Revision 1.20 2000/09/06 14:35:44 morsch |
37 | Use AliDecayerPythia for particle decays. | |
38 | ||
fa480368 | 39 | Revision 1.19 2000/07/11 18:24:56 fca |
40 | Coding convention corrections + few minor bug fixes | |
41 | ||
aee8290b | 42 | Revision 1.18 2000/06/29 21:08:27 morsch |
43 | All paramatrisation libraries derive from the pure virtual base class AliGenLib. | |
44 | This allows to pass a pointer to a library directly to AliGenParam and avoids the | |
45 | use of function pointers in Config.C. | |
46 | ||
b22ee262 | 47 | Revision 1.17 2000/06/09 20:33:30 morsch |
48 | All coding rule violations except RS3 corrected | |
49 | ||
f87cfe57 | 50 | Revision 1.16 2000/05/02 07:51:31 morsch |
51 | - Control precision of pT sampling TF1::SetNpx(..) | |
52 | - Correct initialisation of child-cuts in all constructors. | |
53 | - Most coding rule violations corrected. | |
54 | ||
749070b6 | 55 | Revision 1.15 2000/04/03 15:42:12 morsch |
56 | Cuts on primary particles are separated from those on the decay products. Methods | |
57 | SetChildMomentumRange, SetChildPtRange, SetChildPhiRange, SetChildThetaRange added. | |
58 | ||
cc5d764c | 59 | Revision 1.14 1999/11/09 07:38:48 fca |
60 | Changes for compatibility with version 2.23 of ROOT | |
61 | ||
084c1b4a | 62 | Revision 1.13 1999/11/04 11:30:31 fca |
63 | Correct the logics for SetForceDecay | |
64 | ||
28337bc1 | 65 | Revision 1.12 1999/11/03 17:43:20 fca |
66 | New version from G.Martinez & A.Morsch | |
67 | ||
886b6f73 | 68 | Revision 1.11 1999/09/29 09:24:14 fca |
69 | Introduction of the Copyright and cvs Log | |
70 | ||
4c039060 | 71 | */ |
72 | ||
fe4da5cc | 73 | #include "AliGenParam.h" |
fa480368 | 74 | #include "AliDecayerPythia.h" |
fe4da5cc | 75 | #include "AliGenMUONlib.h" |
76 | #include "AliRun.h" | |
1578254f | 77 | #include <TParticle.h> |
fa480368 | 78 | #include <TParticlePDG.h> |
79 | #include <TDatabasePDG.h> | |
80 | #include <TLorentzVector.h> | |
81 | ||
f87cfe57 | 82 | #include <TF1.h> |
fe4da5cc | 83 | |
84 | ClassImp(AliGenParam) | |
85 | ||
86 | //------------------------------------------------------------ | |
87 | ||
88 | //Begin_Html | |
89 | /* | |
1439f98e | 90 | <img src="picts/AliGenParam.gif"> |
fe4da5cc | 91 | */ |
92 | //End_Html | |
93 | ||
94 | //____________________________________________________________ | |
95 | //____________________________________________________________ | |
96 | AliGenParam::AliGenParam() | |
fe4da5cc | 97 | { |
b22ee262 | 98 | // Deafault constructor |
99 | fPtPara = 0; | |
100 | fYPara = 0; | |
101 | fParam = jpsi_p; | |
102 | fAnalog = analog; | |
103 | SetCutOnChild(); | |
104 | SetChildMomentumRange(); | |
105 | SetChildPtRange(); | |
106 | SetChildPhiRange(); | |
107 | SetChildThetaRange(); | |
108 | SetDeltaPt(); | |
675e9664 | 109 | // |
110 | // Set random number generator | |
111 | sRandom = fRandom; | |
b22ee262 | 112 | } |
113 | ||
114 | AliGenParam::AliGenParam(Int_t npart, AliGenLib * Library, Param_t param, char* tname):AliGenerator(npart) | |
115 | { | |
116 | // Constructor using number of particles parameterisation id and library | |
117 | ||
118 | fPtParaFunc = Library->GetPt(param, tname); | |
119 | fYParaFunc = Library->GetY (param, tname); | |
120 | fIpParaFunc = Library->GetIp(param, tname); | |
121 | ||
122 | fPtPara = 0; | |
123 | fYPara = 0; | |
124 | fParam = param; | |
125 | fAnalog = analog; | |
126 | fChildSelect.Set(5); | |
127 | for (Int_t i=0; i<5; i++) fChildSelect[i]=0; | |
128 | SetForceDecay(); | |
129 | SetCutOnChild(); | |
130 | SetChildMomentumRange(); | |
131 | SetChildPtRange(); | |
132 | SetChildPhiRange(); | |
133 | SetChildThetaRange(); | |
134 | SetDeltaPt(); | |
675e9664 | 135 | // |
136 | // Set random number generator | |
137 | sRandom = fRandom; | |
fe4da5cc | 138 | } |
139 | ||
140 | //____________________________________________________________ | |
886b6f73 | 141 | |
b22ee262 | 142 | AliGenParam::AliGenParam(Int_t npart, Param_t param, char* tname):AliGenerator(npart) |
fe4da5cc | 143 | { |
b22ee262 | 144 | // Constructor using parameterisation id and number of particles |
145 | // | |
675e9664 | 146 | AliGenLib* pLibrary = new AliGenMUONlib(); |
b22ee262 | 147 | |
675e9664 | 148 | fPtParaFunc = pLibrary->GetPt(param, tname); |
149 | fYParaFunc = pLibrary->GetY (param, tname); | |
150 | fIpParaFunc = pLibrary->GetIp(param, tname); | |
b22ee262 | 151 | |
152 | fPtPara = 0; | |
153 | fYPara = 0; | |
154 | fParam = param; | |
155 | fAnalog = analog; | |
156 | fChildSelect.Set(5); | |
157 | for (Int_t i=0; i<5; i++) fChildSelect[i]=0; | |
158 | SetForceDecay(); | |
159 | SetCutOnChild(); | |
160 | SetChildMomentumRange(); | |
161 | SetChildPtRange(); | |
162 | SetChildPhiRange(); | |
163 | SetChildThetaRange(); | |
164 | SetDeltaPt(); | |
fe4da5cc | 165 | } |
166 | ||
886b6f73 | 167 | AliGenParam::AliGenParam(Int_t npart, Param_t param, |
168 | Double_t (*PtPara) (Double_t*, Double_t*), | |
169 | Double_t (*YPara ) (Double_t* ,Double_t*), | |
65fb704d | 170 | Int_t (*IpPara) (TRandom *)) |
886b6f73 | 171 | :AliGenerator(npart) |
172 | { | |
749070b6 | 173 | // Constructor |
28337bc1 | 174 | // Gines Martinez 1/10/99 |
886b6f73 | 175 | fPtParaFunc = PtPara; |
176 | fYParaFunc = YPara; | |
177 | fIpParaFunc = IpPara; | |
28337bc1 | 178 | // |
886b6f73 | 179 | fPtPara = 0; |
180 | fYPara = 0; | |
181 | fParam = param; | |
182 | fAnalog = analog; | |
183 | fChildSelect.Set(5); | |
184 | for (Int_t i=0; i<5; i++) fChildSelect[i]=0; | |
185 | SetForceDecay(); | |
186 | SetCutOnChild(); | |
749070b6 | 187 | SetChildMomentumRange(); |
188 | SetChildPtRange(); | |
189 | SetChildPhiRange(); | |
190 | SetChildThetaRange(); | |
191 | SetDeltaPt(); | |
886b6f73 | 192 | } |
193 | ||
f87cfe57 | 194 | |
195 | AliGenParam::AliGenParam(const AliGenParam & Paramd) | |
196 | { | |
197 | // copy constructor | |
198 | } | |
199 | ||
fe4da5cc | 200 | //____________________________________________________________ |
201 | AliGenParam::~AliGenParam() | |
202 | { | |
749070b6 | 203 | // Destructor |
fe4da5cc | 204 | delete fPtPara; |
205 | delete fYPara; | |
206 | } | |
207 | ||
208 | //____________________________________________________________ | |
209 | void AliGenParam::Init() | |
210 | { | |
749070b6 | 211 | // Initialisation |
fa480368 | 212 | |
213 | fDecayer = new AliDecayerPythia(); | |
fe4da5cc | 214 | //Begin_Html |
215 | /* | |
1439f98e | 216 | <img src="picts/AliGenParam.gif"> |
fe4da5cc | 217 | */ |
218 | //End_Html | |
219 | ||
749070b6 | 220 | fPtPara = new TF1("Pt-Parametrization",fPtParaFunc,fPtMin,fPtMax,0); |
221 | // Set representation precision to 10 MeV | |
222 | Int_t npx= Int_t((fPtMax-fPtMin)/fDeltaPt); | |
223 | ||
224 | fPtPara->SetNpx(npx); | |
225 | ||
226 | fYPara = new TF1("Y -Parametrization",fYParaFunc,fYMin,fYMax,0); | |
227 | TF1* ptPara = new TF1("Pt-Parametrization",fPtParaFunc,0,15,0); | |
228 | TF1* yPara = new TF1("Y -Parametrization",fYParaFunc,-6,6,0); | |
b7601ac4 | 229 | |
fe4da5cc | 230 | // |
231 | // dN/dy| y=0 | |
749070b6 | 232 | Double_t y1=0; |
233 | Double_t y2=0; | |
234 | ||
235 | fdNdy0=fYParaFunc(&y1,&y2); | |
fe4da5cc | 236 | // |
237 | // Integral over generation region | |
749070b6 | 238 | Float_t intYS = yPara ->Integral(fYMin, fYMax); |
239 | Float_t intPt0 = ptPara->Integral(0,15); | |
240 | Float_t intPtS = ptPara->Integral(fPtMin,fPtMax); | |
241 | Float_t phiWgt=(fPhiMax-fPhiMin)/2./TMath::Pi(); | |
242 | if (fAnalog == analog) { | |
243 | fYWgt = intYS/fdNdy0; | |
244 | fPtWgt = intPtS/intPt0; | |
245 | fParentWeight = fYWgt*fPtWgt*phiWgt/fNpart; | |
246 | } else { | |
247 | fYWgt = intYS/fdNdy0; | |
248 | fPtWgt = (fPtMax-fPtMin)/intPt0; | |
249 | fParentWeight = fYWgt*fPtWgt*phiWgt/fNpart; | |
250 | } | |
fe4da5cc | 251 | // |
252 | // particle decay related initialization | |
00d6ce7d | 253 | fDecayer->SetForceDecay(fForceDecay); |
fa480368 | 254 | fDecayer->Init(); |
00d6ce7d | 255 | |
fe4da5cc | 256 | // |
257 | switch (fForceDecay) | |
258 | { | |
259 | case semielectronic: | |
260 | case dielectron: | |
261 | case b_jpsi_dielectron: | |
262 | case b_psip_dielectron: | |
263 | fChildSelect[0]=11; | |
264 | break; | |
265 | case semimuonic: | |
266 | case dimuon: | |
267 | case b_jpsi_dimuon: | |
268 | case b_psip_dimuon: | |
269 | fChildSelect[0]=13; | |
270 | break; | |
b7601ac4 | 271 | case pitomu: |
272 | fChildSelect[0]=13; | |
273 | break; | |
274 | case katomu: | |
275 | fChildSelect[0]=13; | |
276 | break; | |
675e9664 | 277 | case hadronicD: |
278 | // Implement me !! | |
279 | break; | |
886b6f73 | 280 | case nodecay: |
281 | break; | |
282 | case all: | |
283 | break; | |
fe4da5cc | 284 | } |
fe4da5cc | 285 | } |
286 | ||
287 | //____________________________________________________________ | |
288 | void AliGenParam::Generate() | |
289 | { | |
28337bc1 | 290 | // |
291 | // Generate 'npart' of light and heavy mesons (J/Psi, upsilon or phi, Pion, | |
292 | // Kaons, Etas, Omegas) and Baryons (proton, antiprotons, neutrons and | |
293 | // antineutrons in the the desired theta, phi and momentum windows; | |
294 | // Gaussian smearing on the vertex is done if selected. | |
cc5d764c | 295 | // The decay of heavy mesons is done using lujet, |
296 | // and the childern particle are tracked by GEANT | |
297 | // However, light mesons are directly tracked by GEANT | |
298 | // setting fForceDecay = nodecay (SetForceDecay(nodecay)) | |
28337bc1 | 299 | // |
fe4da5cc | 300 | |
00d6ce7d | 301 | fDecayer->ForceDecay(); |
28337bc1 | 302 | Float_t polar[3]= {0,0,0}; // Polarisation of the parent particle (for GEANT tracking) |
303 | Float_t origin0[3]; // Origin of the generated parent particle (for GEANT tracking) | |
304 | Float_t pt, pl, ptot; // Transverse, logitudinal and total momenta of the parent particle | |
305 | Float_t phi, theta; // Phi and theta spherical angles of the parent particle momentum | |
306 | Float_t p[3], pc[3], | |
307 | och[3], pch[10][3]; // Momentum, polarisation and origin of the children particles from lujet | |
fe4da5cc | 308 | Float_t ty, xmt; |
21aaa175 | 309 | Int_t nt, i, j, kfch[10]; |
fe4da5cc | 310 | Float_t wgtp, wgtch; |
311 | Double_t dummy; | |
09fd3ea2 | 312 | static TClonesArray *particles; |
fe4da5cc | 313 | // |
09fd3ea2 | 314 | if(!particles) particles=new TClonesArray("TParticle",1000); |
fa480368 | 315 | |
675e9664 | 316 | static TDatabasePDG *pDataBase = new TDatabasePDG(); |
317 | if(!pDataBase) pDataBase = new TDatabasePDG(); | |
fe4da5cc | 318 | // |
319 | Float_t random[6]; | |
28337bc1 | 320 | |
321 | // Calculating vertex position per event | |
fe4da5cc | 322 | for (j=0;j<3;j++) origin0[j]=fOrigin[j]; |
aee8290b | 323 | if(fVertexSmear==kPerEvent) { |
d9ea0e3b | 324 | // Rndm(random,6); |
325 | // for (j=0;j<3;j++) { | |
326 | // origin0[j]+=fOsigma[j]*TMath::Cos(2*random[2*j]*TMath::Pi())* | |
327 | // TMath::Sqrt(-2*TMath::Log(random[2*j+1])); | |
328 | // TMath::Sqrt(-2*TMath::Log(random[2*j+1])); | |
329 | // } | |
330 | // } | |
331 | Vertex(); | |
332 | for (j=0;j<3;j++) origin0[j]=fVertex[j]; | |
fe4da5cc | 333 | } |
d9ea0e3b | 334 | |
21aaa175 | 335 | Int_t ipa=0; |
28337bc1 | 336 | // Generating fNpart particles |
21aaa175 | 337 | while (ipa<fNpart) { |
cc5d764c | 338 | while(1) { |
fe4da5cc | 339 | // |
340 | // particle type | |
65fb704d | 341 | Int_t iPart = fIpParaFunc(fRandom); |
fa480368 | 342 | fChildWeight=(fDecayer->GetPartialBranchingRatio(iPart))*fParentWeight; |
675e9664 | 343 | TParticlePDG *particle = pDataBase->GetParticle(iPart); |
fa480368 | 344 | Float_t am = particle->Mass(); |
345 | ||
65fb704d | 346 | Rndm(random,2); |
fe4da5cc | 347 | // |
348 | // phi | |
349 | phi=fPhiMin+random[0]*(fPhiMax-fPhiMin); | |
350 | // | |
351 | // y | |
352 | ty=Float_t(TMath::TanH(fYPara->GetRandom())); | |
353 | // | |
354 | // pT | |
82db6e43 | 355 | if (fAnalog == analog) { |
fe4da5cc | 356 | pt=fPtPara->GetRandom(); |
357 | wgtp=fParentWeight; | |
358 | wgtch=fChildWeight; | |
359 | } else { | |
360 | pt=fPtMin+random[1]*(fPtMax-fPtMin); | |
361 | Double_t ptd=pt; | |
362 | wgtp=fParentWeight*fPtParaFunc(& ptd, &dummy); | |
363 | wgtch=fChildWeight*fPtParaFunc(& ptd, &dummy); | |
364 | } | |
365 | xmt=sqrt(pt*pt+am*am); | |
919c2096 | 366 | if (TMath::Abs(ty)==1) ty=0; |
fe4da5cc | 367 | pl=xmt*ty/sqrt(1.-ty*ty); |
368 | theta=TMath::ATan2(pt,pl); | |
cc5d764c | 369 | // Cut on theta |
fe4da5cc | 370 | if(theta<fThetaMin || theta>fThetaMax) continue; |
371 | ptot=TMath::Sqrt(pt*pt+pl*pl); | |
cc5d764c | 372 | // Cut on momentum |
fe4da5cc | 373 | if(ptot<fPMin || ptot>fPMax) continue; |
374 | p[0]=pt*TMath::Cos(phi); | |
375 | p[1]=pt*TMath::Sin(phi); | |
376 | p[2]=pl; | |
aee8290b | 377 | if(fVertexSmear==kPerTrack) { |
65fb704d | 378 | Rndm(random,6); |
fe4da5cc | 379 | for (j=0;j<3;j++) { |
380 | origin0[j]= | |
381 | fOrigin[j]+fOsigma[j]*TMath::Cos(2*random[2*j]*TMath::Pi())* | |
382 | TMath::Sqrt(-2*TMath::Log(random[2*j+1])); | |
383 | } | |
384 | } | |
28337bc1 | 385 | |
386 | // Looking at fForceDecay : | |
cc5d764c | 387 | // if fForceDecay != none Primary particle decays using |
388 | // AliPythia and children are tracked by GEANT | |
28337bc1 | 389 | // |
cc5d764c | 390 | // if fForceDecay == none Primary particle is tracked by GEANT |
391 | // (In the latest, make sure that GEANT actually does all the decays you want) | |
fe4da5cc | 392 | // |
886b6f73 | 393 | if (fForceDecay != nodecay) { |
28337bc1 | 394 | // Using lujet to decay particle |
886b6f73 | 395 | Float_t energy=TMath::Sqrt(ptot*ptot+am*am); |
fa480368 | 396 | TLorentzVector pmom(p[0], p[1], p[2], energy); |
397 | fDecayer->Decay(iPart,&pmom); | |
fe4da5cc | 398 | // |
cc5d764c | 399 | // select decay particles |
fa480368 | 400 | Int_t np=fDecayer->ImportParticles(particles); |
886b6f73 | 401 | Int_t ncsel=0; |
402 | for (i = 1; i<np; i++) { | |
403 | TParticle * iparticle = (TParticle *) particles->At(i); | |
404 | Int_t kf = iparticle->GetPdgCode(); | |
fe4da5cc | 405 | // |
406 | // children | |
5ab0acc9 | 407 | if (ChildSelected(TMath::Abs(kf)) || fForceDecay==all) |
886b6f73 | 408 | { |
409 | pc[0]=iparticle->Px(); | |
410 | pc[1]=iparticle->Py(); | |
411 | pc[2]=iparticle->Pz(); | |
412 | och[0]=origin0[0]+iparticle->Vx()/10; | |
413 | och[1]=origin0[1]+iparticle->Vy()/10; | |
414 | och[2]=origin0[2]+iparticle->Vz()/10; | |
415 | if (fCutOnChild) { | |
749070b6 | 416 | Float_t ptChild=TMath::Sqrt(pc[0]*pc[0]+pc[1]*pc[1]); |
417 | Float_t pChild=TMath::Sqrt(ptChild*ptChild+pc[2]*pc[2]); | |
418 | Float_t thetaChild=TMath::ATan2(ptChild,pc[2]); | |
419 | Float_t phiChild=TMath::ATan2(pc[1],pc[0]); | |
886b6f73 | 420 | Bool_t childok = |
749070b6 | 421 | ((ptChild > fChildPtMin && ptChild <fChildPtMax) && |
422 | (pChild > fChildPMin && pChild <fChildPMax) && | |
423 | (thetaChild > fChildThetaMin && thetaChild <fChildThetaMax) && | |
424 | (phiChild > fChildPhiMin && phiChild <fChildPhiMax)); | |
886b6f73 | 425 | if(childok) |
426 | { | |
427 | pch[ncsel][0]=pc[0]; | |
428 | pch[ncsel][1]=pc[1]; | |
429 | pch[ncsel][2]=pc[2]; | |
430 | kfch[ncsel]=kf; | |
431 | ncsel++; | |
432 | } else { | |
433 | ncsel=-1; | |
434 | break; | |
435 | } // child kine cuts | |
21aaa175 | 436 | } else { |
886b6f73 | 437 | pch[ncsel][0]=pc[0]; |
438 | pch[ncsel][1]=pc[1]; | |
439 | pch[ncsel][2]=pc[2]; | |
440 | kfch[ncsel]=kf; | |
441 | ncsel++; | |
442 | } // if child selection | |
443 | } // select muon | |
444 | } // decay particle loop | |
445 | Int_t iparent; | |
446 | if ((fCutOnChild && ncsel >0) || !fCutOnChild){ | |
447 | ipa++; | |
21aaa175 | 448 | // |
449 | // parent | |
886b6f73 | 450 | gAlice-> |
65fb704d | 451 | SetTrack(0,-1,iPart,p,origin0,polar,0,kPPrimary,nt,wgtp); |
886b6f73 | 452 | iparent=nt; |
f87cfe57 | 453 | gAlice->KeepTrack(nt); |
886b6f73 | 454 | for (i=0; i< ncsel; i++) { |
455 | gAlice->SetTrack(fTrackIt,iparent,kfch[i], | |
456 | &pch[i][0],och,polar, | |
65fb704d | 457 | 0,kPDecay,nt,wgtch); |
886b6f73 | 458 | gAlice->KeepTrack(nt); |
459 | } | |
28337bc1 | 460 | } // Decays by Lujet |
21aaa175 | 461 | } // kinematic selection |
28337bc1 | 462 | else // nodecay option, so parent will be tracked by GEANT (pions, kaons, eta, omegas, baryons) |
463 | { | |
464 | gAlice-> | |
65fb704d | 465 | SetTrack(fTrackIt,-1,iPart,p,origin0,polar,0,kPPrimary,nt,wgtp); |
28337bc1 | 466 | ipa++; |
467 | } | |
fe4da5cc | 468 | break; |
21aaa175 | 469 | } // while |
fe4da5cc | 470 | } // event loop |
d9ea0e3b | 471 | gAlice->SetHighWaterMark(nt); |
472 | ||
fe4da5cc | 473 | } |
474 | ||
475 | Bool_t AliGenParam::ChildSelected(Int_t ip) | |
476 | { | |
749070b6 | 477 | // True if particle is in list of selected children |
fe4da5cc | 478 | for (Int_t i=0; i<5; i++) |
479 | { | |
480 | if (fChildSelect[i]==ip) return kTRUE; | |
481 | } | |
482 | return kFALSE; | |
483 | } | |
484 | ||
1578254f | 485 | Bool_t AliGenParam::KinematicSelection(TParticle *particle) |
fe4da5cc | 486 | { |
749070b6 | 487 | // Perform kinematic cuts |
1578254f | 488 | Float_t px=particle->Px(); |
489 | Float_t py=particle->Py(); | |
490 | Float_t pz=particle->Pz(); | |
fe4da5cc | 491 | // |
492 | // momentum cut | |
493 | Float_t p=TMath::Sqrt(px*px+py*py+pz*pz); | |
494 | if (p > fPMax || p < fPMin) | |
495 | { | |
496 | // printf("\n failed p cut %f %f %f \n",p,fPMin,fPMax); | |
497 | return kFALSE; | |
498 | } | |
499 | Float_t pt=TMath::Sqrt(px*px+py*py); | |
500 | ||
501 | // | |
502 | // theta cut | |
503 | Float_t theta = Float_t(TMath::ATan2(Double_t(pt),Double_t(p))); | |
504 | if (theta > fThetaMax || theta < fThetaMin) | |
505 | { | |
506 | // printf("\n failed theta cut %f %f %f \n",theta,fThetaMin,fThetaMax); | |
507 | return kFALSE; | |
508 | } | |
509 | ||
510 | return kTRUE; | |
511 | } | |
512 | ||
513 | ||
f87cfe57 | 514 | AliGenParam& AliGenParam::operator=(const AliGenParam& rhs) |
515 | { | |
516 | // Assignment operator | |
517 | return *this; | |
518 | } | |
519 | ||
fe4da5cc | 520 | |
521 |