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 ////////////////////////////////////////////////////////////
16 #include <TClonesArray.h>
20 #include "AliESDtrack.h"
21 #include "AliTPCtrack.h"
22 #include "AliTrackReference.h"
23 #include "AliITStrackV2.h"
25 ClassImp(AliHBTTrackPoints)
27 Int_t AliHBTTrackPoints::fgDebug = 0;
28 AliHBTTrackPoints::AliHBTTrackPoints():
36 /***************************************************************/
38 AliHBTTrackPoints::AliHBTTrackPoints(AliHBTTrackPoints::ETypes type, AliESDtrack* track):
48 //Up to now we keep only point in pixels
49 //Used only in non-id analysis
58 Info("AliHBTTrackPoints","Not recognized type");
62 /***************************************************************/
64 AliHBTTrackPoints::AliHBTTrackPoints(Int_t n, AliESDtrack* track, Float_t mf, Float_t dr, Float_t r0):
71 //mf - magnetic field in kG - needed to calculated curvature out of Pt
72 //r0 - starting radius
73 //dr - calculate points every dr cm, default every 30cm
76 Error("AliHBTTrackPoints","ESD track is null");
85 if ( ((track->GetStatus() & AliESDtrack::kTPCrefit) == kFALSE)&&
86 ((track->GetStatus() & AliESDtrack::kTPCin) == kFALSE) )
88 //could happend: its stand alone tracking
90 Warning("AliHBTTrackPoints","This ESD track does not contain TPC information");
103 track->GetInnerExternalParameters(x,par); //get properties of the track
106 Error("AliHBTTrackPoints","This ESD track seem not to contain TPC information (curv is 0)");
112 Error("AliHBTTrackPoints","Zero Magnetic field passed as parameter.");
116 Double_t alpha = track->GetInnerAlpha();
117 Double_t cc = 1000./0.299792458/mf;//conversion constant
118 Double_t c=par[4]/cc;
120 MakePoints(dr,r0,x,par,c,alpha);
123 /***************************************************************/
125 AliHBTTrackPoints::AliHBTTrackPoints(Int_t n, AliTPCtrack* track, Float_t dr, Float_t r0):
133 //dr - calculate points every dr cm, default every 30cm
136 Error("AliHBTTrackPoints","TPC track is null");
144 track->PropagateTo(r0);
146 //* This formation is now fixed in the following way: *
147 //* external param0: local Y-coordinate of a track (cm) *
148 //* external param1: local Z-coordinate of a track (cm) *
149 //* external param2: local sine of the track momentum azimuth angle *
150 //* external param3: tangent of the track momentum dip angle *
151 //* external param4: 1/pt (1/(GeV/c)) *
155 track->GetExternalParameters(x,par); //get properties of the track
157 Double_t alpha = track->GetAlpha();
158 Double_t c=track->GetC();
159 MakePoints(dr,r0,x,par,c,alpha);
161 /***************************************************************/
163 AliHBTTrackPoints::~AliHBTTrackPoints()
170 /***************************************************************/
172 void AliHBTTrackPoints::MakePoints( Float_t dr, Float_t r0, Double_t x, Double_t* par, Double_t c, Double_t alpha)
174 //Calculates points starting at radius r0
175 //spacing every dr (in radial direction)
176 // according to track parameters
177 // x - position in sector local reference frame. x i parallel to R and sector is symmetric with respect to x
178 // par - track external parameters; array with 5 elements; look at AliTPCtrack.h or AliESDtrack.h for their meaning
179 // c - track curvature
180 // alpha - sector's rotation angle (phi) == angle needed for local to global transformation
183 Double_t z0 = par[1];
185 Double_t phi0local = TMath::ATan2(y,x);
186 Double_t phi0global = phi0local + alpha;
188 if (phi0local<0) phi0local+=2*TMath::Pi();
189 if (phi0local>=2.*TMath::Pi()) phi0local-=2*TMath::Pi();
191 if (phi0global<0) phi0global+=2*TMath::Pi();
192 if (phi0global>=2.*TMath::Pi()) phi0global-=2*TMath::Pi();
194 Double_t r = TMath::Hypot(x,y);
198 Info("AliHBTTrackPoints","Radius0 %f, Real Radius %f",r0,r);
201 Info("AliHBTTrackPoints","Phi Global at first padraw %f, Phi locat %f",phi0global,phi0local);
203 Double_t eta = x*c - par[2] ;//par[2] = fX*C - eta; eta==fP2 ; C==fP4
205 //this calculattions are assuming new (current) model
206 Double_t tmp = par[2];
208 tmp = c*y + TMath::Sqrt(tmp);
209 Double_t dca=(TMath::Hypot(eta,tmp) - 1. )/TMath::Abs(c);
211 //Here is old model Cold=Cnew/2.
212 Double_t dcasq = dca*dca;
214 Double_t cst1 = (1.+c2*dca)*dca;//first constant
215 Double_t cst2 = 1. + 2.*c2*dca;//second constant
217 Double_t factorPhi0 = TMath::ASin((c2*r + cst1/r)/cst2);
218 Double_t factorZ0 = TMath::ASin(c2*TMath::Sqrt((r*r-dcasq)/cst2))*par[3]/c2;
220 for(Int_t i = 0; i<fN; i++)
222 Double_t rc = r0 + i*dr;
223 Double_t ftmp = (c2*rc + cst1/rc)/cst2;
227 Warning("AliHBTTrackPoints","ASin argument > 1 %f:",ftmp);
230 else if (ftmp < -1.0)
233 Warning("AliHBTTrackPoints","ASin argument < -1 %f:",ftmp);
237 Double_t factorPhi = TMath::ASin( ftmp );//factor phi od rc
238 Double_t phi = phi0global + factorPhi - factorPhi0;
240 ftmp = (rc*rc-dcasq)/cst2;
244 Warning("AliHBTTrackPoints","Sqrt argument < 0: %f",ftmp);
248 ftmp = c2*TMath::Sqrt(ftmp);
252 Warning("AliHBTTrackPoints","ASin argument > 1: %f",ftmp);
255 else if (ftmp < -1.0)
258 Warning("AliHBTTrackPoints","ASin argument < -1: %f",ftmp);
261 Double_t factorZ = TMath::ASin(ftmp)*par[3]/c2;
262 fZ[i] = z0 + factorZ - factorZ0;
263 fX[i] = rc*TMath::Cos(phi);
264 fY[i] = rc*TMath::Sin(phi);
266 if ( GetDebug() > 2 )
268 Info("AliHBTTrackPoints","X %f Y %f Z %f R asked %f R obtained %f",
269 fX[i],fY[i],fZ[i],rc,TMath::Hypot(fX[i],fY[i]));
273 /***************************************************************/
275 void AliHBTTrackPoints::MakeITSPoints(AliESDtrack* track)
277 //Calculates points in ITS
279 AliITStrackV2 itstrack(*track,kTRUE);
281 itstrack.GetGlobalXYZat(4.0,x,y,z);
286 // Info("MakeITSPoints","X %f Y %f Z %f R asked %f R obtained %f",
287 // fX[0],fY[0],fZ[0],4.0,TMath::Hypot(fX[0],fY[0]));
291 /***************************************************************/
292 void AliHBTTrackPoints::PositionAt(Int_t n, Float_t &x,Float_t &y,Float_t &z)
294 //returns position at point n
297 Error("PositionAt","Point %d out of range",n);
304 if ( GetDebug() > 1 )
306 Info("AliHBTTrackPoints","n %d; X %f; Y %f; Z %f",n,x,y,z);
309 /***************************************************************/
311 void AliHBTTrackPoints::Move(Float_t x, Float_t y, Float_t z)
313 //Moves all points about vector
314 for (Int_t i = 0; i<fN; i++)
321 /***************************************************************/
323 Double_t AliHBTTrackPoints::AvarageDistance(const AliHBTTrackPoints& tr)
325 //returns the aritmethic avarage distance between two tracks
326 // Info("AvarageDistance","Entered");
327 if ( (fN <= 0) || (tr.fN <=0) )
329 if (GetDebug()) Warning("AvarageDistance","One of tracks is empty");
335 Warning("AvarageDistance","Number of points is not equal");
340 for (Int_t i = 0; i<fN; i++)
344 // Float_t r1sq = fX[i]*fX[i]+fY[i]*fY[i];
345 // Float_t r2sq = tr.fX[i]*tr.fX[i]+tr.fY[i]*tr.fY[i];
346 Float_t r1sq = TMath::Hypot(fX[i],fY[i]);
347 Float_t r2sq = TMath::Hypot(tr.fX[i],tr.fY[i]);
348 Info("AvarageDistance","radii: %f %f",r1sq,r2sq);
352 Double_t dx = fX[i]-tr.fX[i];
353 Double_t dy = fY[i]-tr.fY[i];
354 Double_t dz = fZ[i]-tr.fZ[i];
355 sum+=TMath::Sqrt(dx*dx + dy*dy + dz*dz);
359 Info("AvarageDistance","Diff: x ,y z: %f , %f, %f",dx,dy,dz);
360 Info("AvarageDistance","xxyyzz %f %f %f %f %f %f",
361 fX[i],tr.fX[i],fY[i],tr.fY[i],fZ[i],tr.fZ[i]);
365 Double_t retval = sum/((Double_t)fN);
368 Info("AvarageDistance","Avarage distance is %f.",retval);
372 /***************************************************************/
373 /***************************************************************/
374 /***************************************************************/
375 /***************************************************************/
376 /***************************************************************/
377 /***************************************************************/
381 #include "AliRunLoader.h"
382 #include "AliTPCtrack.h"
392 void AliHBTTrackPoints::testesd(Int_t entr,const char* fname )
396 AliRunLoader* rl = AliRunLoader::Open();
399 Float_t mf = rl->GetAliRun()->Field()->SolenoidField();
402 TFile* fFile = TFile::Open(fname);
406 printf("testesd: There is no suche a ESD file\n");
409 AliESD* esd = dynamic_cast<AliESD*>(fFile->Get("0"));
410 AliESDtrack *t = esd->GetTrack(entr);
413 ::Error("testesd","Can not get track %d",entr);
419 AliHBTTrackPoints* tp = new AliHBTTrackPoints(N,t,mf,1.);
430 TH2D* hxy = new TH2D("hxy","hxy",1000,xmin,xmax,1000,ymin,ymax);
431 TH2D* hxyt = new TH2D("hxyt","hxyt",1000,xmin,xmax,1000,ymin,ymax);
432 TH2D* hxyTR = new TH2D("hxyTR","hxyTR",1000,xmin,xmax,1000,ymin,ymax);
434 TH2D* hxz = new TH2D("hxz","hxz",1000,xmin,xmax,1000,zmin,zmax);
435 TH2D* hxzt = new TH2D("hxzt","hxzt",1000,xmin,xmax,1000,zmin,zmax);
436 TH2D* hxzTR = new TH2D("hxzTR","hxzTR",1000,xmin,xmax,1000,zmin,zmax);
438 hxyt->SetDirectory(0x0);
439 hxy->SetDirectory(0x0);
440 hxyTR->SetDirectory(0x0);
442 hxzt->SetDirectory(0x0);
443 hxz->SetDirectory(0x0);
444 hxzTR->SetDirectory(0x0);
448 for (Int_t i = 0;i<N;i++)
451 tp->PositionAt(i,x,y,z);
454 printf("Rdemanded %f\n",r);
455 printf("tpx %f tpy %f tpz %f Rt =%f\n", x,y,z,TMath::Hypot(x,y));
460 TTree* treeTR = rl->TreeTR();
461 TBranch* b = treeTR->GetBranch("TPC");
463 TClonesArray* trackrefs = new TClonesArray("AliTrackReference", 100);
464 AliTrackReference* tref;
465 b->SetAddress(&trackrefs);
467 Int_t tlab = TMath::Abs(t->GetLabel());
469 Int_t netr = (Int_t)treeTR->GetEntries();
470 printf("Found %d entries in TR tree\n",netr);
472 for (Int_t e = 0; e < netr; e++)
475 tref = (AliTrackReference*)trackrefs->At(0);
476 if (tref == 0x0) continue;
477 if (tref->GetTrack() != tlab) continue;
479 printf("Found %d entries in TR array\n",trackrefs->GetEntries());
481 for (Int_t i = 0; i < trackrefs->GetEntries(); i++)
483 tref = (AliTrackReference*)trackrefs->At(i);
484 if (tref->GetTrack() != tlab) continue;
488 printf("Track Ref: x %f y %f z %f\n",tref->X(),tref->Y(),tref->Z());
492 for (Int_t j = 1; j < 10; j++)
494 hxyTR->Fill(x, y+j*0.1);
495 hxyTR->Fill(x, y-j*0.1);
496 hxyTR->Fill(x+j*0.1,y);
497 hxyTR->Fill(x-j*0.1,y);
499 hxzTR->Fill(x,z-j*0.1);
500 hxzTR->Fill(x,z+j*0.1);
501 hxzTR->Fill(x-j*0.1,z);
502 hxzTR->Fill(x+j*0.1,z);
508 // hxzt->Draw("same");
514 /***************************************************************/
515 /***************************************************************/
516 /***************************************************************/
518 void AliHBTTrackPoints::testtpc(Int_t entr)
522 AliRunLoader* rl = AliRunLoader::Open();
523 AliLoader* l = rl->GetLoader("TPCLoader");
525 AliKalmanTrack::SetConvConst(100/0.299792458/0.2/rl->GetAliRun()->Field()->Factor());
527 AliTPCtrack* t = new AliTPCtrack();
528 TBranch* b=l->TreeT()->GetBranch("tracks");
530 l->TreeT()->GetEntry(entr);
532 AliHBTTrackPoints* tp = new AliHBTTrackPoints(N,t,1.);
543 TH2D* hxy = new TH2D("hxy","hxy",1000,xmin,xmax,1000,ymin,ymax);
544 TH2D* hxyt = new TH2D("hxyt","hxyt",1000,xmin,xmax,1000,ymin,ymax);
545 TH2D* hxyTR = new TH2D("hxyTR","hxyTR",1000,xmin,xmax,1000,ymin,ymax);
547 TH2D* hxz = new TH2D("hxz","hxz",1000,xmin,xmax,1000,zmin,zmax);
548 TH2D* hxzt = new TH2D("hxzt","hxzt",1000,xmin,xmax,1000,zmin,zmax);
549 TH2D* hxzTR = new TH2D("hxzTR","hxzTR",1000,xmin,xmax,1000,zmin,zmax);
551 hxyt->SetDirectory(0x0);
552 hxy->SetDirectory(0x0);
553 hxyTR->SetDirectory(0x0);
555 hxzt->SetDirectory(0x0);
556 hxz->SetDirectory(0x0);
557 hxzTR->SetDirectory(0x0);
561 for (Int_t i = 0;i<N;i++)
564 tp->PositionAt(i,x,y,z);
567 printf("Rdemanded %f\n",r);
568 printf("tpx %f tpy %f tpz %f Rt =%f\n", x,y,z,TMath::Hypot(x,y));
570 //BUT they are local!!!!
572 // Double_t phi = t->Phi();
573 Double_t rl = TMath::Hypot(t->GetX(),t->GetY());//real radius
575 Double_t alpha = t->GetAlpha();
576 Double_t salpha = TMath::Sin(alpha);
577 Double_t calpha = TMath::Cos(alpha);
578 x = t->GetX()*calpha - t->GetY()*salpha;
579 y = t->GetX()*salpha + t->GetY()*calpha;
582 printf("tx %f ty %f tz %f Rt = %f R from XY %f\n",x,y,z,TMath::Hypot(x,y),rl);
584 printf("tpz - tz %f\n",z-t->GetZ());
592 TTree* treeTR = rl->TreeTR();
593 b = treeTR->GetBranch("TPC");
595 TClonesArray* trackrefs = new TClonesArray("AliTrackReference", 100);
596 AliTrackReference* tref;
597 b->SetAddress(&trackrefs);
599 Int_t tlab = TMath::Abs(t->GetLabel());
601 Int_t netr = (Int_t)treeTR->GetEntries();
602 printf("Found %d entries in TR tree\n",netr);
604 for (Int_t e = 0; e < netr; e++)
607 tref = (AliTrackReference*)trackrefs->At(0);
608 if (tref == 0x0) continue;
609 if (tref->GetTrack() != tlab) continue;
611 printf("Found %d entries in TR array\n",trackrefs->GetEntries());
613 for (Int_t i = 0; i < trackrefs->GetEntries(); i++)
615 tref = (AliTrackReference*)trackrefs->At(i);
616 if (tref->GetTrack() != tlab) continue;
620 printf("Track Ref: x %f y %f z %f\n",tref->X(),tref->Y(),tref->Z());
624 for (Int_t j = 1; j < 10; j++)
626 hxyTR->Fill(x, y+j*0.1);
627 hxyTR->Fill(x, y-j*0.1);
628 hxyTR->Fill(x+j*0.1,y);
629 hxyTR->Fill(x-j*0.1,y);
631 hxzTR->Fill(x,z-j*0.1);
632 hxzTR->Fill(x,z+j*0.1);
633 hxzTR->Fill(x-j*0.1,z);
634 hxzTR->Fill(x+j*0.1,z);
640 // hxzt->Draw("same");