1 #include "AliHBTTrackPoints.h"
2 //_________________________________
3 ////////////////////////////////////////////////////////////
5 // class AliHBTTrackPoints //
7 // used by Anti-Merging cut //
8 // contains set of poits the lay on track trajectory //
9 // according to reconstructed track parameters - //
10 // NOT CLUSTERS POSITIONS!!! //
11 // Anti-Merging cut is applied only on tracks coming from //
12 // different events (that are use to fill deniminators) //
14 ////////////////////////////////////////////////////////////
15 #include "AliTrackReference.h"
17 #include "AliTPCtrack.h"
18 #include "AliESDtrack.h"
21 #include <TClonesArray.h>
23 ClassImp(AliHBTTrackPoints)
25 Int_t AliHBTTrackPoints::fgDebug = 0;
26 AliHBTTrackPoints::AliHBTTrackPoints():
34 AliHBTTrackPoints::AliHBTTrackPoints(const AliHBTTrackPoints& in):
42 for (Int_t i = 0; i < fN; i++)
49 /***************************************************************/
51 AliHBTTrackPoints& AliHBTTrackPoints::operator=(const AliHBTTrackPoints& in)
54 if(this == &in) return *this;
55 TObject::operator=((const TObject&)in);
80 for (Int_t i = 0; i < fN; i++)
89 /***************************************************************/
91 AliHBTTrackPoints::AliHBTTrackPoints(Int_t n, AliESDtrack* track, Float_t mf, Float_t dr, Float_t r0):
98 //mf - magnetic field in kG - needed to calculated curvature out of Pt
99 //r0 - starting radius
100 //dr - calculate points every dr cm, default every 30cm
103 Error("AliHBTTrackPoints","ESD track is null");
112 for (Int_t i = 0; i < fN; i++)
119 TMath::Hypot(dr,r0)+mf;//just to shut up compilers warning
122 // track->GetInnerExternalParameters(x,par); //get properties of the track
125 // Error("AliHBTTrackPoints","This ESD track does not contain TPC information");
131 // Error("AliHBTTrackPoints","Zero Magnetic field passed as parameter.");
135 // Double_t alpha = track->GetInnerAlpha();
136 // Double_t cc = 1000./0.299792458/mf;//conversion constant
137 // Double_t c=par[4]/cc;
139 // MakePoints(dr,r0,x,par,c,alpha);
142 /***************************************************************/
144 AliHBTTrackPoints::AliHBTTrackPoints(Int_t n, AliTPCtrack* track, Float_t dr, Float_t r0):
152 //dr - calculate points every dr cm, default every 30cm
155 Error("AliHBTTrackPoints","TPC track is null");
163 track->PropagateTo(r0);
165 //* This formation is now fixed in the following way: *
166 //* external param0: local Y-coordinate of a track (cm) *
167 //* external param1: local Z-coordinate of a track (cm) *
168 //* external param2: local sine of the track momentum azimuth angle *
169 //* external param3: tangent of the track momentum dip angle *
170 //* external param4: 1/pt (1/(GeV/c)) *
174 track->GetExternalParameters(x,par); //get properties of the track
176 Double_t alpha = track->GetAlpha();
177 Double_t c=track->GetC();
178 MakePoints(dr,r0,x,par,c,alpha);
181 void AliHBTTrackPoints::MakePoints( Float_t dr, Float_t r0, Double_t x, Double_t* par, Double_t c, Double_t alpha)
183 //Calculates points starting at radius r0
184 //spacing every dr (in radial direction)
185 // according to track parameters
186 // x - position in sector local reference frame. x i parallel to R and sector is symmetric with respect to x
187 // par - track external parameters; array with 5 elements; look at AliTPCtrack.h or AliESDtrack.h for their meaning
188 // c - track curvature
189 // alpha - sector's rotation angle (phi) == angle needed for local to global transformation
192 Double_t z0 = par[1];
194 Double_t phi0local = TMath::ATan2(y,x);
195 Double_t phi0global = phi0local + alpha;
197 if (phi0local<0) phi0local+=2*TMath::Pi();
198 if (phi0local>=2.*TMath::Pi()) phi0local-=2*TMath::Pi();
200 if (phi0global<0) phi0global+=2*TMath::Pi();
201 if (phi0global>=2.*TMath::Pi()) phi0global-=2*TMath::Pi();
203 Double_t r = TMath::Hypot(x,y);
207 Info("AliHBTTrackPoints","Radius0 %f, Real Radius %f",r0,r);
210 Info("AliHBTTrackPoints","Phi Global at first padraw %f, Phi locat %f",phi0global,phi0local);
212 Double_t eta = x*c - par[2] ;//par[2] = fX*C - eta; eta==fP2 ; C==fP4
214 //this calculattions are assuming new (current) model
215 Double_t tmp = par[2];
217 tmp = c*y + TMath::Sqrt(tmp);
218 Double_t dca=(TMath::Hypot(eta,tmp) - 1. )/TMath::Abs(c);
220 //Here is old model Cold=Cnew/2.
221 Double_t dcasq = dca*dca;
223 Double_t cst1 = (1.+c2*dca)*dca;//first constant
224 Double_t cst2 = 1. + 2.*c2*dca;//second constant
226 Double_t factorPhi0 = TMath::ASin((c2*r + cst1/r)/cst2);
227 Double_t factorZ0 = TMath::ASin(c2*TMath::Sqrt((r*r-dcasq)/cst2))*par[3]/c2;
229 for(Int_t i = 0; i<fN; i++)
231 Double_t rc = r0 + i*dr;
232 Double_t factorPhi = TMath::ASin( (c2*rc + cst1/rc)/cst2 );//factor phi od rc
233 Double_t phi = phi0global + factorPhi - factorPhi0;
235 Double_t factorZ = TMath::ASin(c2*TMath::Sqrt((rc*rc-dcasq)/cst2))*par[3]/c2;
236 fZ[i] = z0 + factorZ - factorZ0;
237 fX[i] = rc*TMath::Cos(phi);
238 fY[i] = rc*TMath::Sin(phi);
240 if ( GetDebug() > 2 )
242 Info("AliHBTTrackPoints","X %f Y %f Z %f R asked %f R obtained %f",
243 fX[i],fY[i],fZ[i],rc,TMath::Hypot(fX[i],fY[i]));
247 /***************************************************************/
249 AliHBTTrackPoints::~AliHBTTrackPoints()
256 /***************************************************************/
258 void AliHBTTrackPoints::PositionAt(Int_t n, Float_t &x,Float_t &y,Float_t &z)
260 //returns position at point n
263 Error("PositionAt","Point %d out of range",n);
270 if ( GetDebug() > 1 )
272 Info("AliHBTTrackPoints","n %d; X %f; Y %f; Z %f",n,x,y,z);
275 /***************************************************************/
277 Double_t AliHBTTrackPoints::AvarageDistance(const AliHBTTrackPoints& tr)
279 //returns the aritmethic avarage distance between two tracks
282 Error("AvarageDistance","Number of points is not equal");
285 if ( (fN <= 0) || (tr.fN <=0) )
287 Error("AvarageDistance","One of tracks is empty");
292 for (Int_t i = 0; i<fN; i++)
296 // Float_t r1sq = fX[i]*fX[i]+fY[i]*fY[i];
297 // Float_t r2sq = tr.fX[i]*tr.fX[i]+tr.fY[i]*tr.fY[i];
298 Float_t r1sq = TMath::Hypot(fX[i],fY[i]);
299 Float_t r2sq = TMath::Hypot(tr.fX[i],tr.fY[i]);
300 Info("AvarageDistance","radii: %f %f",r1sq,r2sq);
304 Double_t dx = fX[i]-tr.fX[i];
305 Double_t dy = fY[i]-tr.fY[i];
306 Double_t dz = fZ[i]-tr.fZ[i];
307 sum+=TMath::Sqrt(dx*dx + dy*dy + dz*dz);
311 Info("AvarageDistance","Diff: x ,y z: %f , %f, %f",dx,dy,dz);
312 Info("AvarageDistance","xxyyzz %f %f %f %f %f %f",
313 fX[i],tr.fX[i],fY[i],tr.fY[i],fZ[i],tr.fZ[i]);
317 Double_t retval = sum/((Double_t)fN);
320 Info("AvarageDistance","Avarage distance is %f.",retval);
324 /***************************************************************/
325 /***************************************************************/
326 /***************************************************************/
327 /***************************************************************/
328 /***************************************************************/
329 /***************************************************************/
334 #include "AliRunLoader.h"
335 #include "AliTPCtrack.h"
345 void AliHBTTrackPoints::testesd(Int_t entr,const char* fname )
350 AliRunLoader* rl = AliRunLoader::Open();
353 Float_t mf = rl->GetAliRun()->Field()->SolenoidField();
356 TFile* fFile = TFile::Open(fname);
360 printf("testesd: There is no suche a ESD file\n");
363 AliESD* esd = dynamic_cast<AliESD*>(fFile->Get("0"));
364 AliESDtrack *t = esd->GetTrack(entr);
367 ::Error("testesd","Can not get track %d",entr);
373 AliHBTTrackPoints* tp = new AliHBTTrackPoints(N,t,mf,1.);
384 TH2D* hxy = new TH2D("hxy","hxy",1000,xmin,xmax,1000,ymin,ymax);
385 TH2D* hxyt = new TH2D("hxyt","hxyt",1000,xmin,xmax,1000,ymin,ymax);
386 TH2D* hxyTR = new TH2D("hxyTR","hxyTR",1000,xmin,xmax,1000,ymin,ymax);
388 TH2D* hxz = new TH2D("hxz","hxz",1000,xmin,xmax,1000,zmin,zmax);
389 TH2D* hxzt = new TH2D("hxzt","hxzt",1000,xmin,xmax,1000,zmin,zmax);
390 TH2D* hxzTR = new TH2D("hxzTR","hxzTR",1000,xmin,xmax,1000,zmin,zmax);
392 hxyt->SetDirectory(0x0);
393 hxy->SetDirectory(0x0);
394 hxyTR->SetDirectory(0x0);
396 hxzt->SetDirectory(0x0);
397 hxz->SetDirectory(0x0);
398 hxzTR->SetDirectory(0x0);
402 for (Int_t i = 0;i<N;i++)
405 tp->PositionAt(i,x,y,z);
408 printf("Rdemanded %f\n",r);
409 printf("tpx %f tpy %f tpz %f Rt =%f\n", x,y,z,TMath::Hypot(x,y));
414 TTree* treeTR = rl->TreeTR();
415 TBranch* b = treeTR->GetBranch("TPC");
417 TClonesArray* trackrefs = new TClonesArray("AliTrackReference", 100);
418 AliTrackReference* tref;
419 b->SetAddress(&trackrefs);
421 Int_t tlab = TMath::Abs(t->GetLabel());
423 Int_t netr = (Int_t)treeTR->GetEntries();
424 printf("Found %d entries in TR tree\n",netr);
426 for (Int_t e = 0; e < netr; e++)
429 tref = (AliTrackReference*)trackrefs->At(0);
430 if (tref == 0x0) continue;
431 if (tref->GetTrack() != tlab) continue;
433 printf("Found %d entries in TR array\n",trackrefs->GetEntries());
435 for (Int_t i = 0; i < trackrefs->GetEntries(); i++)
437 tref = (AliTrackReference*)trackrefs->At(i);
438 if (tref->GetTrack() != tlab) continue;
442 printf("Track Ref: x %f y %f z %f\n",tref->X(),tref->Y(),tref->Z());
446 for (Int_t j = 1; j < 10; j++)
448 hxyTR->Fill(x, y+j*0.1);
449 hxyTR->Fill(x, y-j*0.1);
450 hxyTR->Fill(x+j*0.1,y);
451 hxyTR->Fill(x-j*0.1,y);
453 hxzTR->Fill(x,z-j*0.1);
454 hxzTR->Fill(x,z+j*0.1);
455 hxzTR->Fill(x-j*0.1,z);
456 hxzTR->Fill(x+j*0.1,z);
462 // hxzt->Draw("same");
469 /***************************************************************/
470 /***************************************************************/
471 /***************************************************************/
474 void AliHBTTrackPoints::testtpc(Int_t entr)
480 AliRunLoader* rl = AliRunLoader::Open();
481 AliLoader* l = rl->GetLoader("TPCLoader");
483 AliKalmanTrack::SetConvConst(100/0.299792458/0.2/rl->GetAliRun()->Field()->Factor());
485 AliTPCtrack* t = new AliTPCtrack();
486 TBranch* b=l->TreeT()->GetBranch("tracks");
488 l->TreeT()->GetEntry(entr);
490 AliHBTTrackPoints* tp = new AliHBTTrackPoints(N,t,1.);
501 TH2D* hxy = new TH2D("hxy","hxy",1000,xmin,xmax,1000,ymin,ymax);
502 TH2D* hxyt = new TH2D("hxyt","hxyt",1000,xmin,xmax,1000,ymin,ymax);
503 TH2D* hxyTR = new TH2D("hxyTR","hxyTR",1000,xmin,xmax,1000,ymin,ymax);
505 TH2D* hxz = new TH2D("hxz","hxz",1000,xmin,xmax,1000,zmin,zmax);
506 TH2D* hxzt = new TH2D("hxzt","hxzt",1000,xmin,xmax,1000,zmin,zmax);
507 TH2D* hxzTR = new TH2D("hxzTR","hxzTR",1000,xmin,xmax,1000,zmin,zmax);
509 hxyt->SetDirectory(0x0);
510 hxy->SetDirectory(0x0);
511 hxyTR->SetDirectory(0x0);
513 hxzt->SetDirectory(0x0);
514 hxz->SetDirectory(0x0);
515 hxzTR->SetDirectory(0x0);
519 for (Int_t i = 0;i<N;i++)
522 tp->PositionAt(i,x,y,z);
525 printf("Rdemanded %f\n",r);
526 printf("tpx %f tpy %f tpz %f Rt =%f\n", x,y,z,TMath::Hypot(x,y));
528 //BUT they are local!!!!
530 // Double_t phi = t->Phi();
531 Double_t rl = TMath::Hypot(t->GetX(),t->GetY());//real radius
533 Double_t alpha = t->GetAlpha();
534 Double_t salpha = TMath::Sin(alpha);
535 Double_t calpha = TMath::Cos(alpha);
536 x = t->GetX()*calpha - t->GetY()*salpha;
537 y = t->GetX()*salpha + t->GetY()*calpha;
540 printf("tx %f ty %f tz %f Rt = %f R from XY %f\n",x,y,z,TMath::Hypot(x,y),rl);
542 printf("tpz - tz %f\n",z-t->GetZ());
550 TTree* treeTR = rl->TreeTR();
551 b = treeTR->GetBranch("TPC");
553 TClonesArray* trackrefs = new TClonesArray("AliTrackReference", 100);
554 AliTrackReference* tref;
555 b->SetAddress(&trackrefs);
557 Int_t tlab = TMath::Abs(t->GetLabel());
559 Int_t netr = (Int_t)treeTR->GetEntries();
560 printf("Found %d entries in TR tree\n",netr);
562 for (Int_t e = 0; e < netr; e++)
565 tref = (AliTrackReference*)trackrefs->At(0);
566 if (tref == 0x0) continue;
567 if (tref->GetTrack() != tlab) continue;
569 printf("Found %d entries in TR array\n",trackrefs->GetEntries());
571 for (Int_t i = 0; i < trackrefs->GetEntries(); i++)
573 tref = (AliTrackReference*)trackrefs->At(i);
574 if (tref->GetTrack() != tlab) continue;
578 printf("Track Ref: x %f y %f z %f\n",tref->X(),tref->Y(),tref->Z());
582 for (Int_t j = 1; j < 10; j++)
584 hxyTR->Fill(x, y+j*0.1);
585 hxyTR->Fill(x, y-j*0.1);
586 hxyTR->Fill(x+j*0.1,y);
587 hxyTR->Fill(x-j*0.1,y);
589 hxzTR->Fill(x,z-j*0.1);
590 hxzTR->Fill(x,z+j*0.1);
591 hxzTR->Fill(x-j*0.1,z);
592 hxzTR->Fill(x+j*0.1,z);
598 // hxzt->Draw("same");
605 /***************************************************************/