First set of changes to adapt the CF classes to treat correctly the D* (Chiara Z)
[u/mrichter/AliRoot.git] / PWG3 / vertexingHF / AliCFVertexingHFCascade.cxx
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15
16 //-----------------------------------------------------------------------
17 // Class for HF corrections as a function of many variables and steps
18 // For D* and other cascades
19 // 
20 // Author : A.Grelli a.grelli@uu.nl  UTECHT
21 //-----------------------------------------------------------------------
22
23 #include "AliAODRecoDecayHF2Prong.h"
24 #include "AliAODMCParticle.h"
25 #include "AliAODEvent.h"
26 #include "TClonesArray.h"
27 #include "AliCFVertexingHF.h"
28 #include "AliESDtrack.h"
29 #include "TDatabasePDG.h"
30 #include "AliAODRecoCascadeHF.h"
31 #include "AliCFVertexingHFCascade.h"
32 #include "AliCFContainer.h"
33
34 ClassImp(AliCFVertexingHFCascade)
35
36
37 //_________________________________________
38   AliCFVertexingHFCascade::AliCFVertexingHFCascade(TClonesArray *mcArray, UShort_t originDselection):
39   AliCFVertexingHF(mcArray, originDselection)
40 {       
41   // standard constructor
42
43   SetNProngs(3);
44   fPtAccCut=new Float_t[fProngs];
45   fEtaAccCut=new Float_t[fProngs];
46   // element 0 in the cut arrays corresponds to the soft pion!!!!!!!! Careful when setting the values...
47   fPtAccCut[0]=0.;
48   fEtaAccCut[0]=0.;
49   for(Int_t iP=1; iP<fProngs; iP++){
50           fPtAccCut[iP]=0.1;
51           fEtaAccCut[iP]=0.9;
52   }
53
54 }
55
56
57 //_____________________________________
58 AliCFVertexingHFCascade& AliCFVertexingHFCascade::operator=(const AliCFVertexingHFCascade& c)
59 {
60   // operator =
61  
62   if  (this != &c) {
63
64     AliCFVertexingHF::operator=(c);
65    
66   }
67   return *this;
68 }
69
70 //__________________________________________
71 Bool_t AliCFVertexingHFCascade::SetRecoCandidateParam(AliAODRecoDecayHF *recoCand)
72 {
73   // set the AliAODRecoDecay candidate
74   
75   Bool_t bSignAssoc = kFALSE;
76  
77   fRecoCandidate = recoCand;
78   AliAODRecoCascadeHF* dstarD0pi = (AliAODRecoCascadeHF*)recoCand;
79
80   if (!fRecoCandidate) {
81     AliError("fRecoCandidate not found, problem in assignement\n");
82     return bSignAssoc;
83   }
84   
85   if ( fRecoCandidate->GetPrimaryVtx()) AliDebug(3,"fReco Candidate has a pointer to PrimVtx\n");
86   //if (recoCand->GetPrimaryVtx()) printf("Reco Cand has a pointer to PrimVtx\n");
87   
88   //Int_t pdgCand = 413;
89
90   Int_t pdgDgDStartoD0pi[2]={421,211};
91   Int_t pdgDgD0toKpi[2]={321,211};
92
93   Int_t nentries = fmcArray->GetEntriesFast();
94
95   AliDebug(3,Form("nentries = %d\n", nentries));
96  
97   Int_t mcLabel =  dstarD0pi->MatchToMC(413,421,pdgDgDStartoD0pi,pdgDgD0toKpi,fmcArray); 
98   
99   if (mcLabel < 0) return bSignAssoc;
100   SetMCLabel(mcLabel);
101   fmcPartCandidate = dynamic_cast<AliAODMCParticle*>(fmcArray->At(fmcLabel)); 
102
103   if (!fmcPartCandidate){
104     AliDebug(3,"No part candidate");
105     return bSignAssoc;
106   }
107  
108   bSignAssoc = kTRUE;
109   return bSignAssoc;
110 }
111
112 //______________________________________________
113 Bool_t AliCFVertexingHFCascade::GetGeneratedValuesFromMCParticle(Double_t* vectorMC) 
114 {
115   // 
116   // collecting all the necessary info (pt, y, cosThetaStar, ptPi, ptKa, cT) from MC particle
117   //
118         
119         Bool_t bGenValues = kFALSE;
120         
121         
122         Int_t daughter0ds = fmcPartCandidate->GetDaughter(0);
123         Int_t daughter1ds = fmcPartCandidate->GetDaughter(1);
124
125         //the D0
126         AliAODMCParticle* mcPartDaughterD0 = dynamic_cast<AliAODMCParticle*>(fmcArray->At(daughter0ds));
127         AliAODMCParticle* mcPartDaughterPis = dynamic_cast<AliAODMCParticle*>(fmcArray->At(daughter1ds));
128
129         Double_t vtx1[3] = {0,0,0};   // primary vertex         
130         Double_t vtx2daughter0[3] = {0,0,0};   // secondary vertex from daughter 0
131         Double_t vtx2daughter1[3] = {0,0,0};   // secondary vertex from daughter 1
132         fmcPartCandidate->XvYvZv(vtx1);  // cm
133
134         //D0 daughters
135         Int_t daughter0 = mcPartDaughterD0->GetDaughter(0);
136         Int_t daughter1 = mcPartDaughterD0->GetDaughter(1);
137
138         AliAODMCParticle* mcPartDaughter0 = dynamic_cast<AliAODMCParticle*>(fmcArray->At(daughter0)); //D0
139         AliAODMCParticle* mcPartDaughter1 = dynamic_cast<AliAODMCParticle*>(fmcArray->At(daughter1)); //pis
140
141         // getting vertex from daughters
142         mcPartDaughter0->XvYvZv(vtx2daughter0);  // cm
143         mcPartDaughter1->XvYvZv(vtx2daughter1);  //cm
144         if (TMath::Abs(vtx2daughter0[0] - vtx2daughter1[0])>1E-5 || TMath::Abs(vtx2daughter0[1]- vtx2daughter1[1])>1E-5 || TMath::Abs(vtx2daughter0[2] - vtx2daughter1[2])>1E-5) {
145           AliError("Daughters have different secondary vertex, skipping the track");
146           return bGenValues;
147         }
148         
149         Int_t nprongs = 2;
150         Short_t charge = 0;
151         // always instantiate the AliAODRecoDecay with the positive daughter first, the negative second
152         AliAODMCParticle* positiveDaugh = mcPartDaughter0;
153         AliAODMCParticle* negativeDaugh = mcPartDaughter1;
154         if (mcPartDaughter0->GetPdgCode()<0 && mcPartDaughter1->GetPdgCode()>0){
155                 // inverting in case the positive daughter is the second one
156                 positiveDaugh = mcPartDaughter1;
157                 negativeDaugh = mcPartDaughter0;
158         }
159         // getting the momentum from the daughters
160         Double_t px[2] = {positiveDaugh->Px(), negativeDaugh->Px()};            
161         Double_t py[2] = {positiveDaugh->Py(), negativeDaugh->Py()};            
162         Double_t pz[2] = {positiveDaugh->Pz(), negativeDaugh->Pz()};
163         
164         Double_t d0[2] = {0.,0.};               
165         
166         AliAODRecoDecayHF* decay = new AliAODRecoDecayHF(vtx1,vtx2daughter0,nprongs,charge,px,py,pz,d0);
167         
168         Double_t cosThetaStar = 0.;
169         Double_t cosThetaStarD0 = 0.;
170         Double_t cosThetaStarD0bar = 0.;
171         cosThetaStarD0 = decay->CosThetaStar(1,421,211,321);
172         cosThetaStarD0bar = decay->CosThetaStar(0,421,321,211);
173         if (mcPartDaughterD0->GetPdgCode() == 421){  // D0
174           AliDebug(3, Form("D0, with pdgprong0 = %d, pdgprong1 = %d",mcPartDaughter0->GetPdgCode(),mcPartDaughter1->GetPdgCode()));
175           cosThetaStar = cosThetaStarD0;
176         }
177         else if (mcPartDaughterD0->GetPdgCode() == -421){  // D0bar{
178           AliDebug(3, Form("D0bar, with pdgprong0 = %d, pdgprong1 = %d",mcPartDaughter0->GetPdgCode(),mcPartDaughter1->GetPdgCode()));
179           cosThetaStar = cosThetaStarD0bar;
180         }
181         else{
182           AliWarning("There are problems!! particle was expected to be either a D0 or a D0bar, check...");
183           return vectorMC;
184         }
185         if (cosThetaStar < -1 || cosThetaStar > 1) {
186           AliWarning("Invalid value for cosine Theta star, returning");
187           return bGenValues;
188         }
189         
190         Double_t vectorD0[2] ={0.,0.};
191
192         // evaluate the correct cascade
193         if (!EvaluateIfD0toKpi(mcPartDaughterD0,vectorD0)) {
194           AliDebug(2, "Error! the D0 MC doesn't have correct daughters!!");
195           return bGenValues;  
196         }       
197
198         //ct
199         Double_t cT = decay->Ct(421);
200         // get the pT of the daughters
201         Double_t pTD0 = 0.;
202         Double_t pTpi = 0.;
203         
204         if (TMath::Abs(fmcPartCandidate->GetPdgCode()) == 413) {
205                 pTD0 = mcPartDaughterD0->Pt();
206                 pTpi = mcPartDaughterPis->Pt();
207         }
208
209         
210         vectorMC[0] = fmcPartCandidate->Pt();
211         vectorMC[1] = fmcPartCandidate->Y() ;
212         vectorMC[2] = cosThetaStar ;
213         vectorMC[3] = vectorD0[0]; 
214         vectorMC[4] = vectorD0[1];
215         vectorMC[5] = cT*1.E4 ;  // in micron
216         vectorMC[6] = 0.;   // dummy value, meaningless in MC
217         vectorMC[7] = 0.;   // dummy value, meaningless in MC, in micron
218         vectorMC[8] = 0.;   // dummy value, meaningless in MC, in micron
219         vectorMC[9] = -100000.; // dummy value, meaningless in MC, in micron^2
220         vectorMC[10] = 1.01;    // dummy value, meaningless in MC
221         vectorMC[11] = fmcPartCandidate->Phi(); 
222         vectorMC[12] = fzMCVertex;    // z of reconstructed of primary vertex
223         vectorMC[13] = fCentValue; // reconstructed centrality
224
225         delete decay;
226         bGenValues = kTRUE;
227         return bGenValues;
228 }
229 //____________________________________________
230 Bool_t AliCFVertexingHFCascade::GetRecoValuesFromCandidate(Double_t *vectorReco) const
231
232   // read the variables for the container
233
234   Bool_t bFillRecoValues=kFALSE;
235   
236   //Get the D* and the D0 from D*
237   AliAODRecoCascadeHF* dstarD0pi = (AliAODRecoCascadeHF*)fRecoCandidate;
238   AliAODRecoDecayHF2Prong* d0toKpi = (AliAODRecoDecayHF2Prong*)dstarD0pi->Get2Prong();
239   
240
241   if (dstarD0pi->GetPrimaryVtx())printf("dstarD0pi has primary vtx\n");
242   if (fRecoCandidate->GetPrimaryVtx())printf("fRecoCandidateDstar has primary vtx\n");
243
244   Double_t pt =  dstarD0pi->Pt();
245   Double_t rapidity =  dstarD0pi->YDstar();
246   Double_t invMass=0.;
247   Double_t cosThetaStar = 9999.;
248   Double_t pTpi = 0.;
249   Double_t pTK = 0.;
250   Double_t dca = d0toKpi->GetDCA();
251   Double_t d0pi = 0.;
252   Double_t d0K = 0.;
253   Double_t d0xd0 = d0toKpi->Prodd0d0();
254   Double_t cosPointingAngle = d0toKpi->CosPointingAngle();
255   Double_t phi = dstarD0pi->Phi();
256
257   Int_t pdgCode = fmcPartCandidate->GetPdgCode();
258  
259   if (pdgCode > 0){
260     cosThetaStar = d0toKpi->CosThetaStarD0();
261     pTpi = d0toKpi->PtProng(0);
262     pTK = d0toKpi->PtProng(1);
263     d0pi = d0toKpi->Getd0Prong(0);
264     d0K = d0toKpi->Getd0Prong(1);
265     invMass=d0toKpi->InvMassD0();
266   }
267   else {
268     cosThetaStar = d0toKpi->CosThetaStarD0bar();
269     pTpi = d0toKpi->PtProng(1);
270     pTK = d0toKpi->PtProng(0);
271     d0pi = d0toKpi->Getd0Prong(1);
272     d0K = d0toKpi->Getd0Prong(0);
273     invMass= d0toKpi->InvMassD0bar();
274   }
275   
276   Double_t cT = d0toKpi->CtD0();
277   
278   vectorReco[0] = pt;
279   vectorReco[1] = rapidity;
280   vectorReco[2] = cosThetaStar;
281   vectorReco[3] = pTpi;
282   vectorReco[4] = pTK;
283   vectorReco[5] = cT*1.E4;  // in micron
284   vectorReco[6] = dca*1.E4;  // in micron
285   vectorReco[7] = d0pi*1.E4;  // in micron
286   vectorReco[8] = d0K*1.E4;  // in micron
287   vectorReco[9] = d0xd0*1.E8;  // in micron^2
288   vectorReco[10] = cosPointingAngle;  // in micron
289   vectorReco[11] = phi;  
290   vectorReco[12] = fzPrimVertex;    // z of reconstructed of primary vertex
291   vectorReco[13] = fCentValue;
292
293   bFillRecoValues = kTRUE;
294
295   return bFillRecoValues;
296 }
297
298
299 //_____________________________________________________________
300 Bool_t AliCFVertexingHFCascade::CheckMCChannelDecay() const
301
302   // check the required decay channel
303
304   Bool_t checkCD = kFALSE;
305
306   
307   Int_t daughter0 = fmcPartCandidate->GetDaughter(0);
308   Int_t daughter1 = fmcPartCandidate->GetDaughter(1);
309   AliAODMCParticle* mcPartDaughter0 = dynamic_cast<AliAODMCParticle*>(fmcArray->At(daughter0));
310   AliAODMCParticle* mcPartDaughter1 = dynamic_cast<AliAODMCParticle*>(fmcArray->At(daughter1));
311
312   if (!mcPartDaughter0 || !mcPartDaughter1) {
313     AliDebug (2,"Problems in the MC Daughters\n");
314     return checkCD;
315   }
316
317   if (!(TMath::Abs(mcPartDaughter0->GetPdgCode())==421 &&
318         TMath::Abs(mcPartDaughter1->GetPdgCode())==211) && 
319       !(TMath::Abs(mcPartDaughter0->GetPdgCode())==211 &&
320         TMath::Abs(mcPartDaughter1->GetPdgCode())==421)) {
321     AliDebug(2, "The D0 MC doesn't come from a Kpi decay, skipping!!");
322     return checkCD;  
323   }
324   
325   Double_t vectorD0[2] ={0.,0.};
326
327   // D* is a cascade ...evaluate the correct cascade
328   if (!EvaluateIfD0toKpi(mcPartDaughter0,vectorD0)) {
329     AliDebug(2, "Error! the D0 MC doesn't have correct daughters!!");
330     return checkCD;  
331   }
332    
333   checkCD = kTRUE;
334   return checkCD;
335   
336 }
337
338 //__________________________________________
339 Bool_t AliCFVertexingHFCascade::EvaluateIfD0toKpi(AliAODMCParticle* neutralDaugh, Double_t* vectorD0)const
340 {  
341   //
342   // chack wether D0 is decaing into kpi
343   //
344   
345   Bool_t isHadronic = kFALSE;
346   
347   Int_t daughterD00 = neutralDaugh->GetDaughter(0);
348   Int_t daughterD01 = neutralDaugh->GetDaughter(1);
349   
350   AliDebug(2, Form("daughter0 = %d and daughter1 = %d",daughterD00,daughterD01));
351   if (daughterD00 == 0 || daughterD01 == 0) {
352     AliDebug(2, "Error! the D0 MC doesn't have correct daughters!!");
353     return isHadronic;  
354   }
355   
356   if (TMath::Abs(daughterD01 - daughterD00) != 1) { // should be everytime true - see PDGdatabooklet
357     AliDebug(2, "The D0 MC doesn't come from a 2-prong decay, skipping!!");
358     return isHadronic;  
359   }
360   
361   AliAODMCParticle* mcPartDaughterD00 = dynamic_cast<AliAODMCParticle*>(fmcArray->At(daughterD00));
362   AliAODMCParticle* mcPartDaughterD01 = dynamic_cast<AliAODMCParticle*>(fmcArray->At(daughterD01));
363   if (!mcPartDaughterD00 || !mcPartDaughterD01) {
364     AliWarning("D0 MC analysis: At least one Daughter Particle not found in tree, skipping"); 
365     return isHadronic;  
366   }
367   
368   if (!(TMath::Abs(mcPartDaughterD00->GetPdgCode())==321 &&
369         TMath::Abs(mcPartDaughterD01->GetPdgCode())==211) && 
370       !(TMath::Abs(mcPartDaughterD00->GetPdgCode())==211 &&
371         TMath::Abs(mcPartDaughterD01->GetPdgCode())==321)) {
372     AliDebug(2, "The D0 MC doesn't come from a Kpi decay, skipping!!");
373     return isHadronic;  
374   }
375   
376   Double_t pTD0pi = 0;
377   Double_t pTD0K = 0;
378   
379   
380   if (TMath::Abs(mcPartDaughterD00->GetPdgCode()) == 211) {
381     pTD0pi = mcPartDaughterD00->Pt();
382     pTD0K = mcPartDaughterD01->Pt();
383   }
384   else {
385     pTD0pi = mcPartDaughterD01->Pt();
386     pTD0K  = mcPartDaughterD00->Pt();
387   }
388   
389   isHadronic = kTRUE;
390   
391   vectorD0[0] = pTD0pi;
392   vectorD0[1] = pTD0K;
393  
394   return isHadronic;
395
396 }
397
398 //___________________________________________________________
399
400 void AliCFVertexingHFCascade::SetPtAccCut(Float_t* ptAccCut)
401 {
402         //
403         // setting the pt cut to be used in the Acceptance steps (MC+Reco)
404         //
405
406         AliInfo("The 3rd element of the pt cut array will correspond to the cut applied to the soft pion - please check that it is correct");
407         if (fProngs>0){
408                 for (Int_t iP=0; iP<fProngs; iP++){
409                         fPtAccCut[iP]=ptAccCut[iP];
410                 }
411         }
412         return;
413 }               
414
415
416
417 //___________________________________________________________
418
419 void AliCFVertexingHFCascade::SetEtaAccCut(Float_t* etaAccCut)
420 {
421         //
422         // setting the eta cut to be used in the Acceptance steps (MC+Reco)
423         //
424
425         AliInfo("The 3rd element of the eta cut array will correspond to the cut applied to the soft pion - please check that it is correct");
426         if (fProngs>0){
427                 for (Int_t iP=0; iP<fProngs; iP++){
428                         fEtaAccCut[iP]=etaAccCut[iP];
429                 }
430         }
431         return;
432 }       
433 //___________________________________________________________
434
435 void AliCFVertexingHFCascade::SetAccCut(Float_t* ptAccCut, Float_t* etaAccCut)
436 {
437         //
438         // setting the pt and eta cut to be used in the Acceptance steps (MC+Reco)
439         //
440
441         AliInfo("The 3rd element of the pt and cut array will correspond to the cut applied to the soft pion - please check that they are correct");
442         if (fProngs>0){
443                 for (Int_t iP=0; iP<fProngs; iP++){
444                         fPtAccCut[iP]=ptAccCut[iP];
445                         fEtaAccCut[iP]=etaAccCut[iP];
446                 }
447         }
448         return;
449 }               
450
451 //___________________________________________________________
452
453 void AliCFVertexingHFCascade::SetAccCut()
454 {
455         //
456         // setting the pt and eta cut to be used in the Acceptance steps (MC+Reco)
457         //
458
459         AliAODMCParticle* mcPartDaughter = dynamic_cast<AliAODMCParticle*>(fmcArray->At(2)); // should be the soft pion...  
460         if (TMath::Abs(fLabelArray[0]-fLabelArray[1] != 1) || TMath::Abs(fLabelArray[1]-fLabelArray[2] == 1) || TMath::Abs(fLabelArray[0]-fLabelArray[2] == 1) || TMath::Abs(mcPartDaughter->GetPdgCode())){
461                 AliFatal("Apparently the soft pion is not in the third position, causing a crash!!");
462         }
463         if (fProngs>0){
464                 for (Int_t iP=0; iP<fProngs-1; iP++){
465                         fPtAccCut[iP]=0.1;
466                         fEtaAccCut[iP]=0.9;
467                 }
468                 fPtAccCut[3]=0.;  // soft pion
469                 fEtaAccCut[3]=0.9;  // soft pion
470         }
471         return;
472 }               
473
474
475