2 // This class is the task to check the
3 // Propagation and Update method used in the
4 // 1. AliExternalTrackParam
7 // Pure Monte-Carlo data used, not influence of detectors
9 // Input - TParticle + Array of track references - (Points alogn track trajectories)
10 // Output - Trees with track references - no histograms
11 // MC tree - test for material budget correction
12 // see function ProcessRefTracker
13 // MCupdate tree - test for correctness of propagation and update
14 // see function AliMCTrackingTestTask::FitTrackRefs
16 // Principle - Creates AliExternalTrackParam form 1 Track Refernece -
17 // Propagate it to other
18 // Magnetic field and the geometry has to be created before using it
33 #include <TTreeStream.h>
34 #include <AliAnalysisManager.h>
35 #include <AliESDInputHandler.h>
37 #include "AliMCEvent.h"
38 #include "AliMCEventHandler.h"
41 #include "AliMCTrackingTestTask.h"
42 #include "AliGenInfoMaker.h"
46 #include "AliMCInfo.h"
47 #include "AliComparisonObject.h"
48 #include "AliESDRecInfo.h"
49 #include "AliTPCParamSR.h"
50 #include "AliTracker.h"
51 #include "AliTPCseed.h"
58 ClassImp(AliMCTrackingTestTask)
60 //________________________________________________________________________
61 AliMCTrackingTestTask::AliMCTrackingTestTask() :
63 fMCinfo(0), //! MC event handler
71 // Default constructor (should not be used)
75 AliMCTrackingTestTask::AliMCTrackingTestTask(const AliMCTrackingTestTask& /*info*/) :
77 fMCinfo(0), //! MC event handler
86 // Default constructor
92 //________________________________________________________________________
93 AliMCTrackingTestTask::AliMCTrackingTestTask(const char *name) :
94 AliAnalysisTask(name, "AliMCTrackingTestTask"),
95 fMCinfo(0), //! MC event handler
103 // Normal constructor
105 // Input slot #0 works with a TChain
106 DefineInput(0, TChain::Class());
107 // Output slot #0 writes into a TList
108 DefineOutput(0, TObjArray::Class());
113 AliMCTrackingTestTask::~AliMCTrackingTestTask(){
117 if (fDebugLevel>0) printf("AliMCTrackingTestTask::~AliMCTrackingTestTask\n");
118 if (fDebugStreamer) delete fDebugStreamer;
123 //________________________________________________________________________
124 void AliMCTrackingTestTask::ConnectInputData(Option_t *)
127 // Connect the input data
130 cout << "AnalysisTaskTPCCluster::ConnectInputData()" << endl;
132 TTree* tree=dynamic_cast<TTree*>(GetInputData(0));
134 //Printf("ERROR: Could not read chain from input slot 0");
137 AliESDInputHandler *esdH = dynamic_cast<AliESDInputHandler*> (AliAnalysisManager::GetAnalysisManager()->GetInputEventHandler());
139 //Printf("ERROR: Could not get ESDInputHandler");
142 fESD = esdH->GetEvent();
143 //Printf("*** CONNECTED NEW EVENT ****");
146 AliMCEventHandler* mcinfo = (AliMCEventHandler*) (AliAnalysisManager::GetAnalysisManager()->GetMCtruthEventHandler());
147 mcinfo->SetReadTR(kTRUE);
149 fMCinfo = mcinfo->MCEvent();
159 //________________________________________________________________________
160 void AliMCTrackingTestTask::CreateOutputObjects()
163 // Connect the output objects
166 cout << "AnalysisTaskTPCCluster::CreateOutputObjects()" << endl;
171 //________________________________________________________________________
172 void AliMCTrackingTestTask::Exec(Option_t *) {
174 // Execute analysis for current event
178 cout << "AliMCTrackingTestTask::Exec()" << endl;
181 // If MC has been connected
184 cout << "Not MC info\n" << endl;
196 //________________________________________________________________________
197 void AliMCTrackingTestTask::Terminate(Option_t *) {
202 printf("AliMCTrackingTestTask: Terminate() \n");
204 if (fDebugLevel>0) printf("AliMCtrackingTestTask::Terminate\n");
205 if (fDebugStreamer) delete fDebugStreamer;
212 TTreeSRedirector *AliMCTrackingTestTask::GetDebugStreamer(){
214 // Get Debug streamer
215 // In case debug streamer not yet initialized and StreamLevel>0 create new one
217 if (fStreamLevel==0) return 0;
218 if (fDebugStreamer) return fDebugStreamer;
221 dsName+="Debug.root";
222 dsName.ReplaceAll(" ","");
223 fDebugStreamer = new TTreeSRedirector(dsName.Data());
224 return fDebugStreamer;
232 AliExternalTrackParam * AliMCTrackingTestTask::MakeTrack(const AliTrackReference* ref, TParticle*part)
235 // Make track out of the track ref
236 // part - TParticle used to determine chargr
237 // the covariance matrix - equal 0 - starting from ideal MC position
238 Double_t xyz[3]={ref->X(),ref->Y(),ref->Z()};
239 Double_t pxyz[3]={ref->Px(),ref->Py(),ref->Pz()};
241 for (Int_t i=0; i<21;i++) cv[i]=0;
242 if (!part->GetPDG()) return 0;
243 AliExternalTrackParam * param = new AliExternalTrackParam(xyz,pxyz,cv,TMath::Nint(part->GetPDG()->Charge()/3.));
247 Bool_t AliMCTrackingTestTask::PropagateToPoint(AliExternalTrackParam *param, Double_t *xyz, Double_t mass, Float_t step){
249 // Propagate track to point xyz using
250 // AliTracker::PropagateTo functionality
252 // param - track parameters
253 // xyz - position to propagate
254 // mass - particle mass
255 // step - step to be used
256 Double_t radius=TMath::Sqrt(xyz[0]*xyz[0]+xyz[1]*xyz[1]);
257 AliTracker::PropagateTrackTo(param, radius+step, mass, step, kTRUE,0.99);
258 AliTracker::PropagateTrackTo(param, radius+0.5, mass, step*0.1, kTRUE,0.99);
259 Double_t sxyz[3]={0,0,0};
260 AliESDVertex vertex(xyz,sxyz);
261 Bool_t isOK = param->PropagateToDCA(&vertex,AliTracker::GetBz(),10);
266 void AliMCTrackingTestTask::ProcessMCInfo(){
271 TParticle * particle= new TParticle;
272 TClonesArray * trefs = new TClonesArray("AliTrackReference");
273 const Double_t kPcut=0.1;
278 Int_t npart = fMCinfo->GetNumberOfTracks();
279 if (npart==0) return;
280 Double_t vertex[4]={0,0,0,0};
281 fMCinfo->GetParticleAndTR(0, particle, trefs);
283 vertex[0]=particle->Vx();
284 vertex[1]=particle->Vy();
285 vertex[2]=particle->Vz();
286 vertex[3]=particle->R();
291 for (Int_t ipart=0;ipart<npart;ipart++){
292 Int_t status = fMCinfo->GetParticleAndTR(ipart, particle, trefs);
293 if (status<0) continue;
294 if (!particle) continue;
295 if (!trefs) continue;
296 Int_t nref = trefs->GetEntries();
297 if (nref<5) continue;
298 FitTrackRefs(particle,trefs);
299 AliTrackReference * tpcIn=0;
300 AliTrackReference * tpcOut=0;
301 AliTrackReference * trdIn=0;
302 AliTrackReference * trdOut=0;
303 AliTrackReference * itsIn=0;
304 AliTrackReference * itsOut=0;
307 for (Int_t iref=0;iref<nref;iref++){
308 AliTrackReference * ref = (AliTrackReference*)trefs->At(iref);
311 Float_t dir = ref->X()*ref->Px()+ref->Y()*ref->Py();
313 if (dir<0) break; // oposite direction - looping track - return back
314 if (ref->P()<kPcut) continue;
315 if (ref->R()<rmax) break;
316 //if (ref->R()<rmin) break;
318 if (ref->DetectorId()==AliTrackReference::kTPC){
322 if (ref->R()>tpcIn->R()) tpcOut = ref;
326 if (ref->DetectorId()==AliTrackReference::kITS){
330 if (ref->R()>itsIn->R()) itsOut = ref;
334 if (ref->DetectorId()==AliTrackReference::kTRD){
338 if (ref->R()>trdIn->R()) trdOut = ref;
341 if (ref->R()<rmin) rmin=ref->R();
342 if (ref->R()>rmax) rmax=ref->R();
344 if (tpcIn && tpcOut) {
345 ProcessRefTracker(tpcIn,tpcOut,particle,1);
346 ProcessRefTracker(tpcIn,tpcOut,particle,3);
348 if (itsIn && itsOut) ProcessRefTracker(itsIn,itsOut,particle,0);
349 if (trdIn && trdOut) ProcessRefTracker(trdIn,trdOut,particle,2);
355 void AliMCTrackingTestTask::ProcessRefTracker(AliTrackReference* refIn, AliTrackReference* refOut, TParticle*part,Int_t type){
357 // Test propagation from In to out
359 AliExternalTrackParam *param = 0;
360 AliExternalTrackParam *paramMC = 0;
361 Double_t xyzIn[3]={refIn->X(),refIn->Y(), refIn->Z()};
362 Double_t mass = part->GetMass();
365 param=MakeTrack(refOut,part);
366 paramMC=MakeTrack(refOut,part);
368 if (type<3) PropagateToPoint(param,xyzIn, mass, step);
371 seed.Set(param->GetX(),param->GetAlpha(),param->GetParameter(),param->GetCovariance());
372 Float_t alpha= TMath::ATan2(refIn->Y(),refIn->X());
373 seed.Rotate(alpha-seed.GetAlpha());
375 for (Float_t xlayer= seed.GetX(); xlayer>refIn->R(); xlayer-=step){
376 seed.PropagateTo(xlayer);
378 seed.PropagateTo(refIn->R());
379 param->Set(seed.GetX(),seed.GetAlpha(),seed.GetParameter(),seed.GetCovariance());
381 TTreeSRedirector *pcstream = GetDebugStreamer();
384 param->GetXYZ(gpos.GetMatrixArray());
385 param->GetPxPyPz(gmom.GetMatrixArray());
402 void AliMCTrackingTestTask::FitTrackRefs(TParticle * part, TClonesArray * trefs){
407 const Int_t kMinRefs=6;
408 Int_t nrefs = trefs->GetEntries();
409 if (nrefs<kMinRefs) return; // we should have enough references
413 for (Int_t iref=0; iref<nrefs; iref++){
414 AliTrackReference * ref = (AliTrackReference*)trefs->At(iref);
416 Float_t dir = ref->X()*ref->Px()+ref->Y()*ref->Py();
418 if (ref->DetectorId()!=AliTrackReference::kTPC) continue;
419 if (iref0<0) iref0 = iref;
422 if (iref1-iref0<kMinRefs) return;
424 for (Int_t icov=0; icov<14; icov++) covar[icov]=0;
431 AliTrackReference * refIn = (AliTrackReference*)trefs->At(iref0);
432 AliTrackReference * refOut = (AliTrackReference*)trefs->At(iref1);
433 AliExternalTrackParam *paramPropagate= MakeTrack(refIn,part);
434 AliExternalTrackParam *paramUpdate = MakeTrack(refIn,part);
435 paramUpdate->AddCovariance(covar);
436 Double_t mass = part->GetMass();
437 Double_t charge = part->GetPDG()->Charge()/3.;
439 Float_t alphaIn= TMath::ATan2(refIn->Y(),refIn->X());
440 Float_t radiusIn= refIn->R();
441 Float_t alphaOut= TMath::ATan2(refOut->Y(),refOut->X());
442 Float_t radiusOut= refOut->R();
446 AliMagF * field = (AliMagF*) TGeoGlobalMagField::Instance()->GetField();
447 for (Int_t iref = iref0; iref<=iref1; iref++){
448 AliTrackReference * ref = (AliTrackReference*)trefs->At(iref);
449 Float_t alphaC= TMath::ATan2(ref->Y(),ref->X());
450 Double_t pos[3] = {ref->X(), ref->Y(), ref->Z()};
452 field->Field(pos,mag);
453 isOKP&=paramPropagate->Rotate(alphaC);
454 isOKU&=paramUpdate->Rotate(alphaC);
455 for (Float_t xref= paramPropagate->GetX(); xref<ref->R(); xref++){
456 isOKP&=paramPropagate->PropagateTo(xref, mag[2]);
457 isOKU&=paramUpdate->PropagateTo(xref, mag[2]);
459 isOKP&=paramPropagate->PropagateTo(ref->R(), mag[2]);
460 isOKU&=paramUpdate->PropagateTo(ref->R(), mag[2]);
461 Double_t clpos[2] = {0, ref->Z()};
462 Double_t clcov[3] = { 0.005,0,0.005};
463 isOKU&= paramUpdate->Update(clpos, clcov);
465 TTreeSRedirector *pcstream = GetDebugStreamer();
471 paramUpdate->GetXYZ(gposU.GetMatrixArray());
472 paramUpdate->GetPxPyPz(gmomU.GetMatrixArray());
473 paramPropagate->GetXYZ(gposP.GetMatrixArray());
474 paramPropagate->GetPxPyPz(gmomP.GetMatrixArray());
476 (*pcstream)<<"MCupdate"<<
484 "pP.="<<paramPropagate<<
485 "pU.="<<paramUpdate<<
497 void AliMCTrackingTestTask::FinishTaskOutput()
500 // According description in AliAnalisysTask this method is call
501 // on the slaves before sending data
504 gSystem->Exec("pwd");
505 RegisterDebugOutput();
510 void AliMCTrackingTestTask::RegisterDebugOutput(){
515 // store - copy debug output to the destination position
516 // currently ONLY for local copy
519 dsName+="Debug.root";
520 dsName.ReplaceAll(" ","");
521 TString dsName2=fDebugOutputPath.Data();
522 gSystem->MakeDirectory(dsName2.Data());
523 dsName2+=gSystem->HostName();
524 gSystem->MakeDirectory(dsName2.Data());
526 dsName2+=gSystem->BaseName(gSystem->pwd());
528 gSystem->MakeDirectory(dsName2.Data());
530 AliInfo(Form("copy %s\t%s\n",dsName.Data(),dsName2.Data()));
531 printf("copy %s\t%s\n",dsName.Data(),dsName2.Data());
532 TFile::Cp(dsName.Data(),dsName2.Data());
537 gSystem->AddIncludePath("-I$ALICE_ROOT/TPC/macros");
538 gROOT->LoadMacro("$ALICE_ROOT/TPC/macros/AliXRDPROOFtoolkit.cxx+")
539 AliXRDPROOFtoolkit tool;
540 TChain * chain = tool.MakeChain("mctracking.txt","MC",0,100);
544 chain->SetAlias("pdg","(p.fPdgCode)");
545 chain->SetAlias("dPRec","(refOut.P()-par.P())/refIn.P()");
546 chain->SetAlias("dPMC","(refOut.P()-refIn.P())/refIn->P()");
547 chain->SetAlias("dPtRec","(refOut.Pt()-par.Pt())/refIn.Pt()");
548 chain->SetAlias("dPtMC","(refOut.Pt()-refIn.Pt())/refIn->Pt()");
552 chain->Draw("-sqrt(dPRec):-sqrt(dPMC)","abs(pdg)!=11&&type==0&&p.Pt()<0.5&&abs(p.R())<1&&abs(refOut.fZ)<220");
553 htemp->SetYTitle("#sqrt{#DeltaP_{rec}/P}");
554 htemp->SetXTitle("#sqrt{#DeltaP_{mc}/P}");
555 gPad->SaveAs("picLoss/dPcorr_ITS_step1.gif");
556 gPad->SaveAs("picLoss/dPcorr_ITS_step1.eps");
558 chain->Draw("-sqrt(dPRec):-sqrt(dPMC)","abs(pdg)!=11&&type==1&&p.Pt()<0.5&&abs(p.R())<1&&abs(refOut.fZ)<220");
559 htemp->SetYTitle("#sqrt{#DeltaP_{rec}/P}");
560 htemp->SetXTitle("#sqrt{#DeltaP_{mc}/P}");
561 gPad->SaveAs("picLoss/dPcorr_TPC_step1.gif");
562 gPad->SaveAs("picLoss/dPcorr_TPC_step1.eps");
565 chain->Draw("-sqrt(dPRec):-sqrt(dPMC)","abs(pdg)!=11&&type==3&&p.Pt()<0.5&&abs(p.R())<1&&abs(refOut.fZ)<220");
566 htemp->SetYTitle("#sqrt{#DeltaP_{rec}/P}");
567 htemp->SetXTitle("#sqrt{#DeltaP_{mc}/P}");
568 gPad->SaveAs("picLoss/dPcorr_TPCseed_step1.gif");
569 gPad->SaveAs("picLoss/dPcorr_TPCseed_step1.eps");
573 chain->Draw("-sqrt(dPRec):-sqrt(dPMC)","abs(pdg)!=11&&type==2&&p.Pt()<0.5&&abs(p.R())<1&&abs(refOut.fZ)<220");
574 htemp->SetYTitle("#sqrt{#DeltaP_{rec}/P}");
575 htemp->SetXTitle("#sqrt{#DeltaP_{mc}/P}");
576 gPad->SaveAs("picLoss/dPcorr_TRD_step1.gif");
577 gPad->SaveAs("picLoss/dPcorr_TRD_step1.eps");
582 chain->Draw("(par.Pt()-refIn.Pt())/refIn.Pt()>>his(100,-0.02,0.02)","abs(pdg)!=11&&type==3&&p.Pt()<0.5&&abs(p.R())<1&&abs(refOut.fZ)<220");
583 his->SetXTitle("(P_{trec}-P_{tmc})/P_{tmc}");
584 gPad->SaveAs("picLoss/dPtcorr_TPCseed_step1_1D.eps");
585 gPad->SaveAs("picLoss/dPtcorr_TPCseed_step1_1D.gif");
587 chain->Draw("(par.P()-refIn.P())/refIn.P()>>his(100,-0.02,0.02)","abs(pdg)!=11&&type==3&&p.Pt()<0.5&&abs(p.R())<1&&abs(refOut.fZ)<220");
588 his->SetXTitle("(P_{rec}-P_{mc})/P_{mc}");
589 gPad->SaveAs("picLoss/dPcorr_TPCseed_step1_1D.eps");
590 gPad->SaveAs("picLoss/dPcorr_TPCseed_step1_1D.gif");