]>
Commit | Line | Data |
---|---|---|
da0e9ce3 | 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 | // Implementation of AliDecayer using EvtGen package. // | |
17 | // // | |
18 | // Giuseppe E. Bruno & Fiorella Fionda // | |
19 | // (Giuseppe.Bruno@ba.infn.it) (Fiorella.Fionda@ba.infn.it) // | |
20 | /////////////////////////////////////////////////////////////////////////// | |
21 | ||
22 | #include <TSystem.h> | |
23 | #include <TDatabasePDG.h> | |
24 | #include <TParticle.h> | |
25 | #include <TClonesArray.h> | |
26 | #include <TLorentzVector.h> | |
27 | ||
28 | #include "EvtGenBase/EvtStdHep.hh" | |
29 | #include "EvtGenBase/EvtRandomEngine.hh" | |
0ca57c2f | 30 | #include "EvtGenBase/EvtStdlibRandomEngine.hh" |
da0e9ce3 | 31 | #include "EvtGen/EvtGen.hh" |
32 | #include "EvtGenBase/EvtParticle.hh" | |
33 | #include "EvtGenBase/EvtPDL.hh" | |
34 | #include "EvtGenBase/EvtParticleFactory.hh" | |
35 | #include "AliDecayerEvtGen.h" | |
0ca57c2f | 36 | #include "EvtGenExternal/EvtExternalGenList.hh" |
37 | #include "EvtGenBase/EvtAbsRadCorr.hh" | |
da0e9ce3 | 38 | #include "AliLog.h" |
39 | ||
40 | ClassImp(AliDecayerEvtGen) | |
41 | //____________________________________________________________ | |
42 | AliDecayerEvtGen::AliDecayerEvtGen(): | |
43 | fRandomEngine(0x0), | |
0ca57c2f | 44 | fRadCorrEngine(0x0), |
da0e9ce3 | 45 | fGenerator(0x0), |
46 | fEvtstdhep(0x0), | |
47 | fDecayTablePath(0x0), | |
48 | fParticleTablePath(0x0), | |
49 | fDecay(kAll) | |
50 | { | |
51 | // Default constructor | |
52 | fEvtstdhep = new EvtStdHep(); | |
53 | fDecayTablePath = gSystem->ExpandPathName("$ALICE_ROOT/TEvtGen/EvtGen/DECAY.DEC"); //default decay table | |
54 | fParticleTablePath = gSystem->ExpandPathName("$ALICE_ROOT/TEvtGen/EvtGen/evt.pdl"); //particle table | |
55 | } | |
56 | //_________________________________________________________________ | |
57 | AliDecayerEvtGen::AliDecayerEvtGen(const AliDecayerEvtGen &decayer): | |
58 | AliDecayer(decayer), | |
59 | fRandomEngine(decayer.fRandomEngine), | |
60 | fGenerator(decayer.fGenerator), | |
61 | fEvtstdhep(decayer.fEvtstdhep), | |
62 | fDecayTablePath(decayer.fDecayTablePath), | |
63 | fParticleTablePath(decayer.fParticleTablePath), | |
64 | fDecay(decayer.fDecay) | |
65 | { | |
66 | // Copy Constructor | |
67 | decayer.Copy(*this); | |
68 | } | |
69 | //____________________________________________________________ | |
70 | AliDecayerEvtGen::~AliDecayerEvtGen() | |
71 | { | |
72 | // Destructor | |
73 | if(fRandomEngine) {delete fRandomEngine;} | |
74 | fRandomEngine = 0; | |
0ca57c2f | 75 | if(fRadCorrEngine) {delete fRadCorrEngine;} |
76 | fRadCorrEngine = 0; | |
da0e9ce3 | 77 | if(fGenerator) {delete fGenerator;} |
78 | fGenerator = 0; | |
79 | if(fEvtstdhep) {delete fEvtstdhep;} | |
80 | fEvtstdhep = 0; | |
81 | if(fDecayTablePath) {delete fDecayTablePath;} | |
82 | fDecayTablePath = 0; | |
83 | if(fParticleTablePath) {delete fParticleTablePath;} | |
84 | fParticleTablePath = 0; | |
85 | } | |
86 | ||
87 | //___________________________________________________________ | |
88 | void AliDecayerEvtGen::Init() | |
89 | { | |
90 | //Standard AliDecayerEvtGen initializer: | |
91 | //initialize EvtGen with default decay table (DECAY.DEC), particle table (evt.pdl) | |
92 | //and fRandomEngine for generation of random numbers | |
93 | // | |
94 | if(fGenerator){ | |
95 | AliWarning(" AliDecayerEvtGen already initialized!!!!\n"); | |
96 | return; | |
97 | } | |
0ca57c2f | 98 | fRandomEngine = new EvtStdlibRandomEngine(); |
99 | std::list<EvtDecayBase*> extraModels; | |
100 | ||
101 | EvtExternalGenList genList; | |
102 | fRadCorrEngine = genList.getPhotosModel(); | |
103 | extraModels = genList.getListOfModels(); | |
104 | ||
105 | fGenerator=new EvtGen(fDecayTablePath,fParticleTablePath,fRandomEngine,fRadCorrEngine,&extraModels); | |
da0e9ce3 | 106 | } |
107 | //____________________________________________________________ | |
108 | void AliDecayerEvtGen::Decay(Int_t ipart, TLorentzVector *p) | |
109 | { | |
110 | // | |
111 | //Decay a particle | |
112 | //input: pdg code and momentum of the particle to be decayed | |
113 | //all informations about decay products are stored in fEvtstdhep | |
114 | // | |
115 | EvtId IPART=EvtPDL::evtIdFromStdHep(ipart); | |
34dbffe9 | 116 | EvtVector4R p_init(p->E(),p->Px(),p->Py(),p->Pz()); |
da0e9ce3 | 117 | EvtParticle *froot_part=EvtParticleFactory::particleFactory(IPART,p_init); |
118 | fGenerator->generateDecay(froot_part); | |
119 | fEvtstdhep->init(); | |
120 | froot_part->makeStdHep(*fEvtstdhep); | |
0ca57c2f | 121 | froot_part->printTree(); //to print the decay chain |
da0e9ce3 | 122 | froot_part->deleteTree(); |
123 | } | |
124 | ||
125 | //____________________________________________________________ | |
126 | Int_t AliDecayerEvtGen::ImportParticles(TClonesArray *particles) | |
127 | { | |
128 | // | |
129 | //Input: pointer to a TClonesArray - Output(Int_t): number of decay products | |
130 | //Put all the informations about the decay products in the | |
131 | //TClonesArray particles | |
132 | // | |
133 | if (particles == 0) return 0; | |
134 | TClonesArray &clonesParticles = *particles; | |
135 | clonesParticles.Clear(); | |
136 | ||
137 | int j; | |
138 | int istat; | |
139 | int partnum; | |
140 | double px,py,pz,e; | |
141 | double x,y,z,t; | |
142 | EvtVector4R p4,x4; | |
143 | ||
144 | Int_t npart=fEvtstdhep->getNPart(); | |
145 | for(int i=0;i<fEvtstdhep->getNPart();i++){ | |
146 | j=i+1; | |
147 | int jmotherfirst=fEvtstdhep->getFirstMother(i)+1; | |
148 | int jmotherlast=fEvtstdhep->getLastMother(i)+1; | |
149 | int jdaugfirst=fEvtstdhep->getFirstDaughter(i)+1; | |
150 | int jdauglast=fEvtstdhep->getLastDaughter(i)+1; | |
151 | ||
152 | partnum=fEvtstdhep->getStdHepID(i); | |
153 | ||
154 | //verify if all particles of decay chain are in the TDatabasePDG | |
155 | TParticlePDG *partPDG = TDatabasePDG::Instance()->GetParticle(partnum); | |
156 | if(!partPDG) | |
157 | { | |
158 | AliWarning("Particle code non known in TDatabasePDG - set pdg = 89"); | |
159 | partnum=89; //internal use for unspecified resonance data | |
160 | } | |
161 | ||
162 | istat=fEvtstdhep->getIStat(i); | |
163 | ||
164 | if(istat!=1 && istat!=2) Info("ImportParticles","Attention: unknown status code!"); | |
165 | if(istat == 2) istat = 11; //status decayed | |
166 | ||
167 | p4=fEvtstdhep->getP4(i); | |
168 | x4=fEvtstdhep->getX4(i); | |
169 | px=p4.get(1); | |
170 | py=p4.get(2); | |
171 | pz=p4.get(3); | |
172 | e=p4.get(0); | |
774ceaaf | 173 | const Float_t kconvT=0.001/2.999792458e8; // mm/c to seconds conversion |
174 | const Float_t kconvL=1./10; // mm to cm conversion | |
175 | x=x4.get(1)*kconvL;//[cm] | |
176 | y=x4.get(2)*kconvL;//[cm] | |
177 | z=x4.get(3)*kconvL;//[cm] | |
178 | t=x4.get(0)*kconvT;//[s] | |
da0e9ce3 | 179 | |
180 | AliDebug(1,Form("partnum = %d istat = %d primaMadre = %d ultimaMadre = %d primaF = %d ultimaF=%d x=%f y=%f z=%f t=%f e=%f px=%f \n",partnum,istat,jmotherfirst,jmotherlast,jdaugfirst,jdauglast,x,y,z,t,e,px)); | |
181 | ||
182 | new(clonesParticles[i]) TParticle(partnum,istat,jmotherfirst,-1,jdaugfirst,jdauglast,px,py,pz,e,x,y,z,t); | |
183 | ||
184 | //set polarization!!! | |
185 | } | |
186 | ||
187 | return npart; | |
188 | ||
189 | } | |
190 | ||
191 | void AliDecayerEvtGen::Copy(TObject &) const | |
192 | { | |
193 | // | |
194 | // Copy *this onto AliDecayerEvtGen -- not implemented | |
195 | // | |
196 | Fatal("Copy","Not implemented!\n"); | |
197 | } | |
198 | ||
199 | void AliDecayerEvtGen::ForceDecay() | |
200 | { | |
201 | // | |
202 | // Intupt: none - Output: none | |
203 | // Set the decay mode to decay particles: for each case is read a | |
204 | // different decay table. case kAll read the default decay table only | |
205 | // | |
206 | Decay_t decay = fDecay; | |
207 | switch(decay) | |
208 | { | |
0ca57c2f | 209 | case kAll: // particles decayed "naturally" according to $ALICE_ROOT/TEvtGen/EvtGen/DECAY.DEC |
3a6cdcc8 | 210 | break; |
da0e9ce3 | 211 | case kBJpsiDiElectron: |
3a6cdcc8 | 212 | SetDecayTablePath(gSystem->ExpandPathName("$ALICE_ROOT/TEvtGen/EvtGen/DecayTable/BTOJPSITOELE.DEC")); |
213 | break; | |
da0e9ce3 | 214 | case kBJpsi: |
3a6cdcc8 | 215 | SetDecayTablePath(gSystem->ExpandPathName("$ALICE_ROOT/TEvtGen/EvtGen/DecayTable/BTOJPSI.DEC")); |
216 | break; | |
da0e9ce3 | 217 | case kBJpsiDiMuon: |
3a6cdcc8 | 218 | SetDecayTablePath(gSystem->ExpandPathName("$ALICE_ROOT/TEvtGen/EvtGen/DecayTable/BTOJPSITOMU.DEC")); |
219 | break; | |
da0e9ce3 | 220 | case kBSemiElectronic: |
3a6cdcc8 | 221 | SetDecayTablePath(gSystem->ExpandPathName("$ALICE_ROOT/TEvtGen/EvtGen/DecayTable/BTOELE.DEC")); |
222 | break; | |
941c36b4 | 223 | case kHadronicD: |
de323cb7 | 224 | SetDecayTablePath(gSystem->ExpandPathName("$ALICE_ROOT/TEvtGen/EvtGen/DecayTable/HADRONICD.DEC")); |
941c36b4 | 225 | break; |
de323cb7 | 226 | case kHadronicDWithout4Bodies: |
227 | SetDecayTablePath(gSystem->ExpandPathName("$ALICE_ROOT/TEvtGen/EvtGen/DecayTable/HADRONICDWITHOUT4BODIES.DEC")); | |
228 | break; | |
229 | case kChiToJpsiGammaToElectronElectron: | |
3a6cdcc8 | 230 | SetDecayTablePath(gSystem->ExpandPathName("$ALICE_ROOT/TEvtGen/EvtGen/DecayTable/CHICTOJPSITOELE.DEC")); |
231 | break; | |
da0e9ce3 | 232 | case kChiToJpsiGammaToMuonMuon: |
3a6cdcc8 | 233 | SetDecayTablePath(gSystem->ExpandPathName("$ALICE_ROOT/TEvtGen/EvtGen/DecayTable/CHICTOJPSITOMUON.DEC")); |
234 | break; | |
235 | case kSemiElectronic: | |
236 | SetDecayTablePath(gSystem->ExpandPathName("$ALICE_ROOT/TEvtGen/EvtGen/DecayTable/BANDCTOELE.DEC")); | |
237 | break; | |
da0e9ce3 | 238 | case kBSemiMuonic: |
3a6cdcc8 | 239 | SetDecayTablePath(gSystem->ExpandPathName("$ALICE_ROOT/TEvtGen/EvtGen/DecayTable/BTOMU.DEC")); |
240 | break; | |
da0e9ce3 | 241 | case kSemiMuonic: |
3a6cdcc8 | 242 | SetDecayTablePath(gSystem->ExpandPathName("$ALICE_ROOT/TEvtGen/EvtGen/DecayTable/BANDCTOMU.DEC")); |
243 | break; | |
da0e9ce3 | 244 | case kDiElectron: |
3a6cdcc8 | 245 | SetDecayTablePath(gSystem->ExpandPathName("$ALICE_ROOT/TEvtGen/EvtGen/DecayTable/DIELECTRON.DEC")); |
246 | break; | |
247 | case kDiMuon: | |
248 | SetDecayTablePath(gSystem->ExpandPathName("$ALICE_ROOT/TEvtGen/EvtGen/DecayTable/DIMUON.DEC")); | |
249 | break; | |
da0e9ce3 | 250 | case kBPsiPrimeDiMuon: |
3a6cdcc8 | 251 | SetDecayTablePath(gSystem->ExpandPathName("$ALICE_ROOT/TEvtGen/EvtGen/DecayTable/BTOPSIPRIMETODIMUON.DEC")); |
252 | break; | |
253 | case kBPsiPrimeDiElectron: | |
254 | SetDecayTablePath(gSystem->ExpandPathName("$ALICE_ROOT/TEvtGen/EvtGen/DecayTable/BTOPSIPRIMETODIELECTRON.DEC")); | |
255 | break; | |
256 | case kJpsiDiMuon: | |
257 | SetDecayTablePath(gSystem->ExpandPathName("$ALICE_ROOT/TEvtGen/EvtGen/DecayTable/JPSIDIMUON.DEC")); | |
258 | break; | |
de323cb7 | 259 | case kPsiPrimeJpsiDiElectron: |
260 | SetDecayTablePath(gSystem->ExpandPathName("$ALICE_ROOT/TEvtGen/EvtGen/DecayTable/PSIPRIMETOJPSITOMU.DEC")); | |
261 | break; | |
262 | case kPhiKK: | |
263 | SetDecayTablePath(gSystem->ExpandPathName("$ALICE_ROOT/TEvtGen/EvtGen/DecayTable/PHITOK.DEC")); | |
264 | break; | |
265 | case kOmega: | |
266 | SetDecayTablePath(gSystem->ExpandPathName("$ALICE_ROOT/TEvtGen/EvtGen/DecayTable/OMEGATOLAMBDAK.DEC")); | |
267 | break; | |
268 | case kLambda: | |
269 | SetDecayTablePath(gSystem->ExpandPathName("$ALICE_ROOT/TEvtGen/EvtGen/DecayTable/LAMBDATOPROTPI.DEC")); | |
270 | break; | |
3a6cdcc8 | 271 | case kHardMuons: |
de323cb7 | 272 | SetDecayTablePath(gSystem->ExpandPathName("$ALICE_ROOT/TEvtGen/EvtGen/DecayTable/HARDMUONS.DEC")); |
273 | break; | |
274 | case kElectronEM: | |
275 | SetDecayTablePath(gSystem->ExpandPathName("$ALICE_ROOT/TEvtGen/EvtGen/DecayTable/ELECTRONEM.DEC")); | |
276 | break; | |
277 | case kDiElectronEM: | |
278 | SetDecayTablePath(gSystem->ExpandPathName("$ALICE_ROOT/TEvtGen/EvtGen/DecayTable/DIELECTRONEM.DEC")); | |
279 | break; | |
280 | case kGammaEM: | |
281 | SetDecayTablePath(gSystem->ExpandPathName("$ALICE_ROOT/TEvtGen/EvtGen/DecayTable/GAMMAEM.DEC")); | |
282 | break; | |
283 | case kBeautyUpgrade: | |
284 | SetDecayTablePath(gSystem->ExpandPathName("$ALICE_ROOT/TEvtGen/EvtGen/DecayTable/BEAUTYUPGRADE.DEC")); | |
285 | break; | |
da0e9ce3 | 286 | case kPiToMu: |
287 | case kKaToMu: | |
288 | case kAllMuonic: | |
289 | case kWToMuon: | |
290 | case kWToCharm: | |
291 | case kWToCharmToMuon: | |
292 | case kZDiMuon: | |
293 | case kZDiElectron: | |
da0e9ce3 | 294 | case kNoDecay: |
295 | case kNoDecayHeavy: | |
296 | case kNeutralPion: | |
f2f8bbb9 | 297 | case kBJpsiUndecayed: |
49686315 | 298 | case kNoDecayBeauty: |
f2f8bbb9 | 299 | AliWarning(Form("Warning: case %d not implemented for this class!",(int)decay)); |
da0e9ce3 | 300 | break; |
301 | } | |
302 | ReadDecayTable(); | |
303 | } | |
304 | ||
305 | Float_t AliDecayerEvtGen::GetPartialBranchingRatio(Int_t) | |
306 | { | |
307 | // This method is dummy | |
308 | return 1.; | |
309 | } | |
310 | ||
311 | Float_t AliDecayerEvtGen::GetLifetime(Int_t kf) | |
312 | { | |
313 | // | |
314 | //Input: pdg code of a particle | |
315 | //return lifetime in sec for a particle with particle code kf | |
316 | // | |
317 | EvtId IdPart=EvtPDL::evtIdFromStdHep(kf); | |
318 | Double_t lifetime = EvtPDL::getctau(IdPart); //c*tau (mm) | |
319 | AliDebug(1,Form("lifetime is %f (mum) , particle id= %d",lifetime*1000,kf)); | |
320 | return lifetime*kconv; //tau (sec) | |
321 | } | |
322 | ||
323 | void AliDecayerEvtGen::ReadDecayTable() | |
324 | { | |
325 | //Input none - Output none | |
326 | //Read the decay table that correspond to the path | |
327 | //fDecayTablePath | |
328 | // | |
329 | TString temp = fDecayTablePath; | |
330 | if(!temp.EndsWith("DECAY.DEC")) | |
331 | fGenerator->readUDecay(fDecayTablePath); | |
332 | } | |
333 | //////////////////////////////////////////////////////////// | |
334 | Bool_t AliDecayerEvtGen::SetDecayTablePath(Char_t *path) | |
335 | { | |
336 | // | |
337 | //Set the path of the decay table read to force particle decays | |
338 | // | |
339 | if(gSystem->AccessPathName(path)) | |
340 | { | |
341 | AliWarning("Attention: This path not exist!\n"); | |
342 | return kFALSE; | |
343 | } | |
344 | fDecayTablePath = path; | |
345 | return kTRUE; | |
346 | } | |
347 | ||
348 | ||
349 |