Fixing bugs in FMD reconstruction. Everything should work now
[u/mrichter/AliRoot.git] / ANALYSIS / AliAnalysisTaskMCParticleFilter.cxx
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da97a08a 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// Analysis task for Kinematic filtering
18// Fill AODtrackMC tracks from Kinematic stack
19//
20
21#include <TChain.h>
22#include <TFile.h>
23#include "TParticle.h"
a3b51fd2 24#include "TParameter.h"
da97a08a 25#include "TString.h"
a3b51fd2 26#include "TList.h"
27#include "TProfile.h"
28#include "TH1F.h"
29
da97a08a 30
31#include "AliAnalysisTaskMCParticleFilter.h"
32#include "AliAnalysisManager.h"
33#include "AliAnalysisFilter.h"
34#include "AliHeader.h"
35#include "AliStack.h"
36#include "AliMCEvent.h"
37#include "AliMCEventHandler.h"
38#include "AliAODEvent.h"
39#include "AliAODHeader.h"
dce1b636 40#include "AliAODMCHeader.h"
da97a08a 41#include "AliAODHandler.h"
42#include "AliAODVertex.h"
43#include "AliAODMCParticle.h"
e988332e 44#include "AliCollisionGeometry.h"
c4b2bb17 45#include "AliGenDPMjetEventHeader.h"
46#include "AliGenHijingEventHeader.h"
47#include "AliGenPythiaEventHeader.h"
e988332e 48#include "AliGenCocktailEventHeader.h"
da97a08a 49
50#include "AliLog.h"
51
52ClassImp(AliAnalysisTaskMCParticleFilter)
53
54////////////////////////////////////////////////////////////////////////
55
56//____________________________________________________________________
57AliAnalysisTaskMCParticleFilter::AliAnalysisTaskMCParticleFilter():
58AliAnalysisTaskSE(),
a3b51fd2 59 fTrackFilterMother(0x0),
60 fHistList(0x0)
da97a08a 61{
62 // Default constructor
63}
64
a3b51fd2 65Bool_t AliAnalysisTaskMCParticleFilter::Notify()
66{
67 //
68 // Implemented Notify() to read the cross sections
c4b2bb17 69 // from pyxsec.root
a3b51fd2 70 //
71 TTree *tree = AliAnalysisManager::GetAnalysisManager()->GetTree();
72 Double_t xsection = 0;
73 UInt_t ntrials = 0;
74 if(tree){
75 TFile *curfile = tree->GetCurrentFile();
76 if (!curfile) {
77 Error("Notify","No current file");
78 return kFALSE;
79 }
80
81 TString fileName(curfile->GetName());
82 if(fileName.Contains("AliESDs.root")){
83 fileName.ReplaceAll("AliESDs.root", "pyxsec.root");
84 }
85 else if(fileName.Contains("AliAOD.root")){
86 fileName.ReplaceAll("AliAOD.root", "pyxsec.root");
87 }
88 else if(fileName.Contains("galice.root")){
89 // for running with galice and kinematics alone...
90 fileName.ReplaceAll("galice.root", "pyxsec.root");
91 }
92
93
94 TFile *fxsec = TFile::Open(fileName.Data());
95 if(!fxsec){
96 AliInfo(Form("%s:%d %s not found in the Input",(char*)__FILE__,__LINE__,fileName.Data()));
97 // not a severe condition we just do not have the information...
98 return kTRUE;
99 }
100 TTree *xtree = (TTree*)fxsec->Get("Xsection");
101 if(!xtree){
102 Printf("%s:%d tree not found in the pyxsec.root",(char*)__FILE__,__LINE__);
103 return kTRUE;
104 }
105 xtree->SetBranchAddress("xsection",&xsection);
106 xtree->SetBranchAddress("ntrials",&ntrials);
107 xtree->GetEntry(0);
108 ((TProfile*)(fHistList->FindObject("h1Xsec")))->Fill("<#sigma>",xsection);
a3b51fd2 109 }
110 return kTRUE;
111}
112
113
114
da97a08a 115//____________________________________________________________________
116AliAnalysisTaskMCParticleFilter::AliAnalysisTaskMCParticleFilter(const char* name):
117 AliAnalysisTaskSE(name),
a3b51fd2 118 fTrackFilterMother(0x0),
119 fHistList(0x0)
da97a08a 120{
121 // Default constructor
a3b51fd2 122 DefineOutput(1,TList::Class());
da97a08a 123}
124
a3b51fd2 125/*
da97a08a 126//____________________________________________________________________
127AliAnalysisTaskMCParticleFilter::AliAnalysisTaskMCParticleFilter(const AliAnalysisTaskMCParticleFilter& obj):
128 AliAnalysisTaskSE(obj),
129 fTrackFilterMother(obj.fTrackFilterMother)
130{
131 // Copy constructor
132}
a3b51fd2 133*/
da97a08a 134//____________________________________________________________________
135AliAnalysisTaskMCParticleFilter::~AliAnalysisTaskMCParticleFilter()
136{
137 // if( fTrackFilterMother ) delete fTrackFilterMother;
138}
139
a3b51fd2 140/*
da97a08a 141//____________________________________________________________________
142AliAnalysisTaskMCParticleFilter& AliAnalysisTaskMCParticleFilter::operator=(const AliAnalysisTaskMCParticleFilter& other)
143{
144// Assignment
145 if(this!=&other) {
146 AliAnalysisTaskSE::operator=(other);
147 fTrackFilterMother = other.fTrackFilterMother;
148 }
149 return *this;
150}
a3b51fd2 151*/
da97a08a 152//____________________________________________________________________
153void AliAnalysisTaskMCParticleFilter::UserCreateOutputObjects()
154{
155 // Create the output container
156 if (OutputTree()&&fTrackFilterMother)
157 OutputTree()->GetUserInfo()->Add(fTrackFilterMother);
d2740fba 158
159 // this part is mainly needed to set the MCEventHandler
160 // to the AODHandler, this will not be needed when
161 // AODHandler goes to ANALYSISalice
162 // setting in the steering macro will not work on proof :(
163 // so we have to do it in a task
164
165 // the branch booking can also go into the AODHandler then
166
dce1b636 167
168 // mcparticles
da97a08a 169 TClonesArray *tca = new TClonesArray("AliAODMCParticle", 0);
170 tca->SetName(AliAODMCParticle::StdBranchName());
171 AddAODBranch("TClonesArray",&tca);
da97a08a 172
dce1b636 173 // MC header...
174 AliAODMCHeader *mcHeader = new AliAODMCHeader();
dce1b636 175 mcHeader->SetName(AliAODMCHeader::StdBranchName());
176 AddAODBranch("AliAODMCHeader",&mcHeader);
177
178
179
180 AliMCEventHandler *mcH = (AliMCEventHandler*) ((AliAnalysisManager::GetAnalysisManager())->GetMCtruthEventHandler());
da97a08a 181 AliAODHandler *aodH = dynamic_cast<AliAODHandler*> ((AliAnalysisManager::GetAnalysisManager())->GetOutputEventHandler());
182 if(!aodH){
183 Printf("%s:&d Could not get AODHandler",(char*)__FILE__,__LINE__);
184 return;
185 }
186 aodH->SetMCEventHandler(mcH);
dce1b636 187
a3b51fd2 188
189 // these are histograms, for averaging and summing
190 // do it via histograms to be PROOF-proof
191 // which merges the results from different workers
192 // histos are not saved reside only in memory
193
194
195
196 fHistList = new TList();
197 TProfile *h1Xsec = new TProfile("h1Xsec","xsec from pyxsec.root",1,0,1);
198 h1Xsec->GetXaxis()->SetBinLabel(1,"<#sigma>");
199 fHistList->Add(h1Xsec);
c4b2bb17 200 TH1F* h1Trials = new TH1F("h1Trials","trials from MC header",1,0,1);
a3b51fd2 201 h1Trials->GetXaxis()->SetBinLabel(1,"#sum{ntrials}");
202 fHistList->Add(h1Trials);
203
da97a08a 204
205}
206
207//____________________________________________________________________
208void AliAnalysisTaskMCParticleFilter::UserExec(Option_t */*option*/)
209{
210// Execute analysis for current event
211//
212
213// Fill AOD tracks from Kinematic stack
214
215 // get AliAOD Event
216 AliAODEvent* aod = AODEvent();
217 if (!aod) {
218 AliWarning("No Output Handler connected, doing nothing !") ;
219 return;
220 }
221
222 AliMCEventHandler *mcH = (AliMCEventHandler*) ((AliAnalysisManager::GetAnalysisManager())->GetMCtruthEventHandler());
223 if(!mcH){
224 AliWarning("No MC handler Found");
225 return;
226 }
227
228
229 // fetch the output
230 // Fill control histos
231
232 // tmp array for holding the mctracks
233 // need to set mother and duagther __before__
234 // filling in the tree
235
236 AliMCEvent *mcE = MCEvent();
237
238 if(!mcE){
239 AliWarning("No MC event Found");
240 return;
241 }
242
da97a08a 243 Int_t np = mcE->GetNumberOfTracks();
93836e1b 244 Int_t nprim = mcE->GetNumberOfPrimaries();
da97a08a 245 // TODO ADD MC VERTEX
e988332e 246
247 AliAODMCHeader *aodMCHo = (AliAODMCHeader *) aod->FindListObject("mcHeader");
e988332e 248 // Get the proper MC Collision Geometry
249 AliGenEventHeader* mcEH = mcE->GenEventHeader();
e988332e 250
c4b2bb17 251 AliGenPythiaEventHeader *pyH = dynamic_cast<AliGenPythiaEventHeader*>(mcEH);
252 AliGenHijingEventHeader *hiH = 0;
253 AliCollisionGeometry *colG = 0;
254 AliGenDPMjetEventHeader *dpmH = 0;
255 // it can be only one save some casts
256 // assuming PYTHIA and HIJING are the most likely ones...
257 if(!pyH){
258 hiH = dynamic_cast<AliGenHijingEventHeader*>(mcEH);
259 if(!hiH){
260 colG = dynamic_cast<AliCollisionGeometry *>(mcEH);
261 if(!colG)dpmH = dynamic_cast<AliGenDPMjetEventHeader*>(mcEH);
262 }
263 }
264
265
266 // fetch the trials on a event by event basis, not from pyxsec.root otherwise
267 // we will get a problem when running on proof since Notify may be called
268 // more than once per file
269 // consider storing this information in the AOD output via AliAODHandler
270 Float_t ntrials = 0;
e988332e 271 if (!colG) {
272 AliGenCocktailEventHeader *ccEH = dynamic_cast<AliGenCocktailEventHeader *>(mcEH);
273 if (ccEH) {
274 TList *genHeaders = ccEH->GetHeaders();
275 for (int imch=0; imch<genHeaders->GetEntries(); imch++) {
c4b2bb17 276 if(!pyH)dynamic_cast<AliGenPythiaEventHeader*>(genHeaders->At(imch));
277 if(!hiH)dynamic_cast<AliGenHijingEventHeader*>(genHeaders->At(imch));
278 if(!colG)colG = dynamic_cast<AliCollisionGeometry *>(genHeaders->At(imch));
279 if(!dpmH)dynamic_cast<AliGenDPMjetEventHeader*>(genHeaders->At(imch));
e988332e 280 }
281 }
282 }
283
c4b2bb17 284 // take the trials from the p+p event
285 if(hiH)ntrials = hiH->Trials();
5ae590c4 286 if(dpmH)ntrials = dpmH->Trials();
c4b2bb17 287 if(pyH)ntrials = pyH->Trials();
288 if(ntrials)((TH1F*)(fHistList->FindObject("h1Trials")))->Fill("#sum{ntrials}",ntrials);
289
290
291
292
e988332e 293 if (colG) {
294 aodMCHo->SetReactionPlaneAngle(colG->ReactionPlaneAngle());
295 printf("Found Collision Geometry. Got Reaction Plane %lf\n", colG->ReactionPlaneAngle());
296 }
297
de514cf0 298
299
300 // check varibales for charm need all daughters
301 static int iTaken = 0;
302 static int iAll = 0;
303 static int iCharm = 0;
da97a08a 304
305
da97a08a 306 Int_t j=0;
307 for (Int_t ip = 0; ip < np; ip++){
7aad0c47 308 AliMCParticle* mcpart = (AliMCParticle*) mcE->GetTrack(ip);
da97a08a 309 TParticle* part = mcpart->Particle();
da97a08a 310 Float_t xv = part->Vx();
311 Float_t yv = part->Vy();
312 Float_t zv = part->Vz();
313 Float_t rv = TMath::Sqrt(xv * xv + yv * yv);
314
315 Bool_t write = kFALSE;
63892dd0 316
da97a08a 317 if (ip < nprim) {
318 // Select the primary event
319 write = kTRUE;
320 } else if (part->GetUniqueID() == 4) {
321 // Particles from decay
322 // Check that the decay chain ends at a primary particle
93836e1b 323 AliMCParticle* mother = mcpart;
324 Int_t imo = mcpart->GetMother();
da97a08a 325 while((imo >= nprim) && (mother->GetUniqueID() == 4)) {
7aad0c47 326 mother = (AliMCParticle*) mcE->GetTrack(imo);
93836e1b 327 imo = mother->GetMother();
da97a08a 328 }
63892dd0 329 // Select according to pseudorapidity and production point of primary ancestor
7aad0c47 330 if (imo < nprim && Select(((AliMCParticle*) mcE->GetTrack(imo))->Particle(), rv, zv))write = kTRUE;
da97a08a 331 } else if (part->GetUniqueID() == 5) {
332 // Now look for pair production
93836e1b 333 Int_t imo = mcpart->GetMother();
da97a08a 334 if (imo < nprim) {
335 // Select, if the gamma is a primary
336 write = kTRUE;
337 } else {
338 // Check if the gamma comes from the decay chain of a primary particle
7aad0c47 339 AliMCParticle* mother = (AliMCParticle*) mcE->GetTrack(imo);
93836e1b 340 imo = mother->GetMother();
da97a08a 341 while((imo >= nprim) && (mother->GetUniqueID() == 4)) {
7aad0c47 342 mother = (AliMCParticle*) mcE->GetTrack(imo);
93836e1b 343 imo = mother->GetMother();
da97a08a 344 }
345 // Select according to pseudorapidity and production point
93836e1b 346 if (imo < nprim && Select(mother->Particle(), rv, zv))
da97a08a 347 write = kTRUE;
348 }
349 }
350 /*
351 else if (part->GetUniqueID() == 13){
352 // Evaporation
353 // Check that we end at a primary particle
354 TParticle* mother = part;
355 Int_t imo = part->GetFirstMother();
356 while((imo >= nprim) && ((mother->GetUniqueID() == 4 ) || ( mother->GetUniqueID() == 13))) {
357 mother = mcE->Stack()->Particle(imo);
358 imo = mother->GetFirstMother();
359 }
360 // Select according to pseudorapidity and production point
361 if (imo < nprim && Select(mother, rv, zv))
362 write = kTRUE;
363 }
364 */
365 if (write) {
366 if(mcH)mcH->SelectParticle(ip);
367 j++;
de514cf0 368
369 // debug info to check fro charm daugthers
370 if((TMath::Abs(part->GetPdgCode()))==411){
371 iCharm++;
372 Int_t d0 = mcpart->GetFirstDaughter();
373 Int_t d1 = mcpart->GetLastDaughter();
374 if(d0>0&&d1>0){
375 for(int id = d0;id <= d1;id++){
376 iAll++;
377 if(mcH->IsParticleSelected(id))iTaken++;
378 }
63892dd0 379 }
de514cf0 380 }// if charm
63892dd0 381 }
382 }
a3c57861 383
384 AliInfo(Form("Taken daughters %d/%d of %d charm",iTaken,iAll,iCharm));
63892dd0 385
a3b51fd2 386 PostData(1,fHistList);
63892dd0 387
da97a08a 388 return;
389}
390
a3b51fd2 391void AliAnalysisTaskMCParticleFilter::Terminate(Option_t */*option*/){
392 //
393 // Terminate the execution save the PYTHIA x_section to the UserInfo()
394 //
395
396
397 TTree *tree = (TTree*)GetOutputData(0);
398 fHistList = (TList*)GetOutputData(1);
399 if(!fHistList){
400 Printf("%s:%d Output list not found",(char*)__FILE__,__LINE__);
401 return;
402 }
403
404 if(!tree){
405 Printf("%s:%d Output tree not found",(char*)__FILE__,__LINE__);
406 return;
407 }
408
409 TProfile *hXsec = ((TProfile*)(fHistList->FindObject("h1Xsec")));
410 TH1F* hTrials = ((TH1F*)(fHistList->FindObject("h1Trials")));
411 if(!hXsec)return;
412 if(!hTrials)return;
413
414 Float_t xsec = hXsec->GetBinContent(1);
415 Float_t trials = hTrials->Integral();
416 AliInfo(Form("Average -section %.4E and total number of trials %E",xsec,trials));
417
418 // This only works if the tree is not a special output
419 // in this case it is already written
420 /*
421 TParameter<float> *x = new TParameter<float>("xsection",xsec);
422 tree->GetUserInfo()->Add(x);
423 TParameter<float> *t = new TParameter<float>("trials",trials);
424 tree->GetUserInfo()->Add(t);
425 */
426
427
428}
429
da97a08a 430Bool_t AliAnalysisTaskMCParticleFilter::Select(TParticle* part, Float_t rv, Float_t zv)
431{
432 // Selection accoring to eta of the mother and production point
433 // This has to be refined !!!!!!
434
435 // Esp if we don't have collisison in the central barrel but e.g. beam gas
436 // return kTRUE;
437
438 Float_t eta = part->Eta();
439
440 // central barrel consider everything in the ITS...
441 // large eta window for smeared vertex and SPD acceptance (2 at z = 0)
442 // larger for V0s in the TPC
443 // if (TMath::Abs(eta) < 2.5 && rv < 250. && TMath::Abs(zv)<255)return kTRUE;
444
63892dd0 445 if (TMath::Abs(eta) < 2.5 && rv < 170)return kTRUE;
446
da97a08a 447 // Andreas' Cuts
63892dd0 448 // if (TMath::Abs(eta) < 1. && rv < 170)return kTRUE;
449
450
da97a08a 451
452 // Muon arm
453 if(eta > -4.2 && eta < -2.3 && zv > -500.)return kTRUE; // Muon arms
454
455 // PMD acceptance 2.3 <= eta < = 3.5
456 // if(eta>2.0&&eta<3.7)return kTRUE;
457
458 return kFALSE;
459
460}
461