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 //Used only in non-id analysis
57 Info("AliHBTTrackPoints","Not recognized type");
61 /***************************************************************/
63 AliHBTTrackPoints::AliHBTTrackPoints(Int_t n, AliESDtrack* track, Float_t mf, Float_t dr, Float_t r0):
70 //mf - magnetic field in kG - needed to calculated curvature out of Pt
71 //r0 - starting radius
72 //dr - calculate points every dr cm, default every 30cm
75 Error("AliHBTTrackPoints","ESD track is null");
84 if ( ((track->GetStatus() & AliESDtrack::kTPCrefit) == kFALSE)&&
85 ((track->GetStatus() & AliESDtrack::kTPCin) == kFALSE) )
87 //could happend: its stand alone tracking
89 Warning("AliHBTTrackPoints","This ESD track does not contain TPC information");
102 track->GetInnerExternalParameters(x,par); //get properties of the track
105 Error("AliHBTTrackPoints","This ESD track seem not to contain TPC information (curv is 0)");
111 Error("AliHBTTrackPoints","Zero Magnetic field passed as parameter.");
115 Double_t alpha = track->GetInnerAlpha();
116 Double_t cc = 1000./0.299792458/mf;//conversion constant
117 Double_t c=par[4]/cc;
119 MakePoints(dr,r0,x,par,c,alpha);
122 /***************************************************************/
124 AliHBTTrackPoints::AliHBTTrackPoints(Int_t n, AliTPCtrack* track, Float_t dr, Float_t r0):
132 //dr - calculate points every dr cm, default every 30cm
135 Error("AliHBTTrackPoints","TPC track is null");
143 track->PropagateTo(r0);
145 //* This formation is now fixed in the following way: *
146 //* external param0: local Y-coordinate of a track (cm) *
147 //* external param1: local Z-coordinate of a track (cm) *
148 //* external param2: local sine of the track momentum azimuth angle *
149 //* external param3: tangent of the track momentum dip angle *
150 //* external param4: 1/pt (1/(GeV/c)) *
154 track->GetExternalParameters(x,par); //get properties of the track
156 Double_t alpha = track->GetAlpha();
157 Double_t c=track->GetC();
158 MakePoints(dr,r0,x,par,c,alpha);
160 /***************************************************************/
162 AliHBTTrackPoints::~AliHBTTrackPoints()
169 /***************************************************************/
171 void AliHBTTrackPoints::MakePoints( Float_t dr, Float_t r0, Double_t x, Double_t* par, Double_t c, Double_t alpha)
173 //Calculates points starting at radius r0
174 //spacing every dr (in radial direction)
175 // according to track parameters
176 // x - position in sector local reference frame. x i parallel to R and sector is symmetric with respect to x
177 // par - track external parameters; array with 5 elements; look at AliTPCtrack.h or AliESDtrack.h for their meaning
178 // c - track curvature
179 // alpha - sector's rotation angle (phi) == angle needed for local to global transformation
182 Double_t z0 = par[1];
184 Double_t phi0local = TMath::ATan2(y,x);
185 Double_t phi0global = phi0local + alpha;
187 if (phi0local<0) phi0local+=2*TMath::Pi();
188 if (phi0local>=2.*TMath::Pi()) phi0local-=2*TMath::Pi();
190 if (phi0global<0) phi0global+=2*TMath::Pi();
191 if (phi0global>=2.*TMath::Pi()) phi0global-=2*TMath::Pi();
193 Double_t r = TMath::Hypot(x,y);
197 Info("AliHBTTrackPoints","Radius0 %f, Real Radius %f",r0,r);
200 Info("AliHBTTrackPoints","Phi Global at first padraw %f, Phi locat %f",phi0global,phi0local);
202 Double_t eta = x*c - par[2] ;//par[2] = fX*C - eta; eta==fP2 ; C==fP4
204 //this calculattions are assuming new (current) model
205 Double_t tmp = par[2];
207 tmp = c*y + TMath::Sqrt(tmp);
208 Double_t dca=(TMath::Hypot(eta,tmp) - 1. )/TMath::Abs(c);
210 //Here is old model Cold=Cnew/2.
211 Double_t dcasq = dca*dca;
213 Double_t cst1 = (1.+c2*dca)*dca;//first constant
214 Double_t cst2 = 1. + 2.*c2*dca;//second constant
216 Double_t factorPhi0 = TMath::ASin((c2*r + cst1/r)/cst2);
217 Double_t factorZ0 = TMath::ASin(c2*TMath::Sqrt((r*r-dcasq)/cst2))*par[3]/c2;
219 for(Int_t i = 0; i<fN; i++)
221 Double_t rc = r0 + i*dr;
222 Double_t ftmp = (c2*rc + cst1/rc)/cst2;
226 Warning("AliHBTTrackPoints","ASin argument > 1 %f:",ftmp);
229 else if (ftmp < -1.0)
232 Warning("AliHBTTrackPoints","ASin argument < -1 %f:",ftmp);
236 Double_t factorPhi = TMath::ASin( ftmp );//factor phi od rc
237 Double_t phi = phi0global + factorPhi - factorPhi0;
239 ftmp = (rc*rc-dcasq)/cst2;
243 Warning("AliHBTTrackPoints","Sqrt argument < 0: %f",ftmp);
247 ftmp = c2*TMath::Sqrt(ftmp);
251 Warning("AliHBTTrackPoints","ASin argument > 1: %f",ftmp);
254 else if (ftmp < -1.0)
257 Warning("AliHBTTrackPoints","ASin argument < -1: %f",ftmp);
260 Double_t factorZ = TMath::ASin(ftmp)*par[3]/c2;
261 fZ[i] = z0 + factorZ - factorZ0;
262 fX[i] = rc*TMath::Cos(phi);
263 fY[i] = rc*TMath::Sin(phi);
265 if ( GetDebug() > 2 )
267 Info("AliHBTTrackPoints","X %f Y %f Z %f R asked %f R obtained %f",
268 fX[i],fY[i],fZ[i],rc,TMath::Hypot(fX[i],fY[i]));
272 /***************************************************************/
274 void AliHBTTrackPoints::MakeITSPoints(AliESDtrack* track)
276 //Calculates points in ITS
278 AliITStrackV2 itstrack(*track,kTRUE);
280 static const Double_t r[6] = {4.0, 7.0, 14.9, 23.8, 39.1, 43.6};
281 for (Int_t i = 0; i < 6; i++)
283 itstrack.GetGlobalXYZat(r[i],x,y,z);
287 // Info("MakeITSPoints","X %f Y %f Z %f R asked %f R obtained %f",
288 // fX[i],fY[i],fZ[i],r[i],TMath::Hypot(fX[i],fY[i]));
293 /***************************************************************/
294 void AliHBTTrackPoints::PositionAt(Int_t n, Float_t &x,Float_t &y,Float_t &z)
296 //returns position at point n
299 Error("PositionAt","Point %d out of range",n);
306 if ( GetDebug() > 1 )
308 Info("AliHBTTrackPoints","n %d; X %f; Y %f; Z %f",n,x,y,z);
311 /***************************************************************/
313 void AliHBTTrackPoints::Move(Float_t x, Float_t y, Float_t z)
315 //Moves all points about vector
316 for (Int_t i = 0; i<fN; i++)
323 /***************************************************************/
325 Double_t AliHBTTrackPoints::AvarageDistance(const AliHBTTrackPoints& tr)
327 //returns the aritmethic avarage distance between two tracks
328 // Info("AvarageDistance","Entered");
329 if ( (fN <= 0) || (tr.fN <=0) )
331 if (GetDebug()) Warning("AvarageDistance","One of tracks is empty");
337 Warning("AvarageDistance","Number of points is not equal");
342 for (Int_t i = 0; i<fN; i++)
346 // Float_t r1sq = fX[i]*fX[i]+fY[i]*fY[i];
347 // Float_t r2sq = tr.fX[i]*tr.fX[i]+tr.fY[i]*tr.fY[i];
348 Float_t r1sq = TMath::Hypot(fX[i],fY[i]);
349 Float_t r2sq = TMath::Hypot(tr.fX[i],tr.fY[i]);
350 Info("AvarageDistance","radii: %f %f",r1sq,r2sq);
354 Double_t dx = fX[i]-tr.fX[i];
355 Double_t dy = fY[i]-tr.fY[i];
356 Double_t dz = fZ[i]-tr.fZ[i];
357 sum+=TMath::Sqrt(dx*dx + dy*dy + dz*dz);
361 Info("AvarageDistance","Diff: x ,y z: %f , %f, %f",dx,dy,dz);
362 Info("AvarageDistance","xxyyzz %f %f %f %f %f %f",
363 fX[i],tr.fX[i],fY[i],tr.fY[i],fZ[i],tr.fZ[i]);
367 Double_t retval = sum/((Double_t)fN);
370 Info("AvarageDistance","Avarage distance is %f.",retval);
374 /***************************************************************/
375 /***************************************************************/
376 /***************************************************************/
377 /***************************************************************/
378 /***************************************************************/
379 /***************************************************************/
383 #include "AliRunLoader.h"
384 #include "AliTPCtrack.h"
394 void AliHBTTrackPoints::testesd(Int_t entr,const char* fname )
398 AliRunLoader* rl = AliRunLoader::Open();
401 Float_t mf = rl->GetAliRun()->Field()->SolenoidField();
404 TFile* fFile = TFile::Open(fname);
408 printf("testesd: There is no suche a ESD file\n");
411 AliESD* esd = dynamic_cast<AliESD*>(fFile->Get("0"));
412 AliESDtrack *t = esd->GetTrack(entr);
415 ::Error("testesd","Can not get track %d",entr);
421 AliHBTTrackPoints* tp = new AliHBTTrackPoints(N,t,mf,1.);
432 TH2D* hxy = new TH2D("hxy","hxy",1000,xmin,xmax,1000,ymin,ymax);
433 TH2D* hxyt = new TH2D("hxyt","hxyt",1000,xmin,xmax,1000,ymin,ymax);
434 TH2D* hxyTR = new TH2D("hxyTR","hxyTR",1000,xmin,xmax,1000,ymin,ymax);
436 TH2D* hxz = new TH2D("hxz","hxz",1000,xmin,xmax,1000,zmin,zmax);
437 TH2D* hxzt = new TH2D("hxzt","hxzt",1000,xmin,xmax,1000,zmin,zmax);
438 TH2D* hxzTR = new TH2D("hxzTR","hxzTR",1000,xmin,xmax,1000,zmin,zmax);
440 hxyt->SetDirectory(0x0);
441 hxy->SetDirectory(0x0);
442 hxyTR->SetDirectory(0x0);
444 hxzt->SetDirectory(0x0);
445 hxz->SetDirectory(0x0);
446 hxzTR->SetDirectory(0x0);
450 for (Int_t i = 0;i<N;i++)
453 tp->PositionAt(i,x,y,z);
456 printf("Rdemanded %f\n",r);
457 printf("tpx %f tpy %f tpz %f Rt =%f\n", x,y,z,TMath::Hypot(x,y));
462 TTree* treeTR = rl->TreeTR();
463 TBranch* b = treeTR->GetBranch("TPC");
465 TClonesArray* trackrefs = new TClonesArray("AliTrackReference", 100);
466 AliTrackReference* tref;
467 b->SetAddress(&trackrefs);
469 Int_t tlab = TMath::Abs(t->GetLabel());
471 Int_t netr = (Int_t)treeTR->GetEntries();
472 printf("Found %d entries in TR tree\n",netr);
474 for (Int_t e = 0; e < netr; e++)
477 tref = (AliTrackReference*)trackrefs->At(0);
478 if (tref == 0x0) continue;
479 if (tref->GetTrack() != tlab) continue;
481 printf("Found %d entries in TR array\n",trackrefs->GetEntries());
483 for (Int_t i = 0; i < trackrefs->GetEntries(); i++)
485 tref = (AliTrackReference*)trackrefs->At(i);
486 if (tref->GetTrack() != tlab) continue;
490 printf("Track Ref: x %f y %f z %f\n",tref->X(),tref->Y(),tref->Z());
494 for (Int_t j = 1; j < 10; j++)
496 hxyTR->Fill(x, y+j*0.1);
497 hxyTR->Fill(x, y-j*0.1);
498 hxyTR->Fill(x+j*0.1,y);
499 hxyTR->Fill(x-j*0.1,y);
501 hxzTR->Fill(x,z-j*0.1);
502 hxzTR->Fill(x,z+j*0.1);
503 hxzTR->Fill(x-j*0.1,z);
504 hxzTR->Fill(x+j*0.1,z);
510 // hxzt->Draw("same");
516 /***************************************************************/
517 /***************************************************************/
518 /***************************************************************/
520 void AliHBTTrackPoints::testtpc(Int_t entr)
524 AliRunLoader* rl = AliRunLoader::Open();
525 AliLoader* l = rl->GetLoader("TPCLoader");
527 AliKalmanTrack::SetConvConst(100/0.299792458/0.2/rl->GetAliRun()->Field()->Factor());
529 AliTPCtrack* t = new AliTPCtrack();
530 TBranch* b=l->TreeT()->GetBranch("tracks");
532 l->TreeT()->GetEntry(entr);
534 AliHBTTrackPoints* tp = new AliHBTTrackPoints(N,t,1.);
545 TH2D* hxy = new TH2D("hxy","hxy",1000,xmin,xmax,1000,ymin,ymax);
546 TH2D* hxyt = new TH2D("hxyt","hxyt",1000,xmin,xmax,1000,ymin,ymax);
547 TH2D* hxyTR = new TH2D("hxyTR","hxyTR",1000,xmin,xmax,1000,ymin,ymax);
549 TH2D* hxz = new TH2D("hxz","hxz",1000,xmin,xmax,1000,zmin,zmax);
550 TH2D* hxzt = new TH2D("hxzt","hxzt",1000,xmin,xmax,1000,zmin,zmax);
551 TH2D* hxzTR = new TH2D("hxzTR","hxzTR",1000,xmin,xmax,1000,zmin,zmax);
553 hxyt->SetDirectory(0x0);
554 hxy->SetDirectory(0x0);
555 hxyTR->SetDirectory(0x0);
557 hxzt->SetDirectory(0x0);
558 hxz->SetDirectory(0x0);
559 hxzTR->SetDirectory(0x0);
563 for (Int_t i = 0;i<N;i++)
566 tp->PositionAt(i,x,y,z);
569 printf("Rdemanded %f\n",r);
570 printf("tpx %f tpy %f tpz %f Rt =%f\n", x,y,z,TMath::Hypot(x,y));
572 //BUT they are local!!!!
574 // Double_t phi = t->Phi();
575 Double_t rl = TMath::Hypot(t->GetX(),t->GetY());//real radius
577 Double_t alpha = t->GetAlpha();
578 Double_t salpha = TMath::Sin(alpha);
579 Double_t calpha = TMath::Cos(alpha);
580 x = t->GetX()*calpha - t->GetY()*salpha;
581 y = t->GetX()*salpha + t->GetY()*calpha;
584 printf("tx %f ty %f tz %f Rt = %f R from XY %f\n",x,y,z,TMath::Hypot(x,y),rl);
586 printf("tpz - tz %f\n",z-t->GetZ());
594 TTree* treeTR = rl->TreeTR();
595 b = treeTR->GetBranch("TPC");
597 TClonesArray* trackrefs = new TClonesArray("AliTrackReference", 100);
598 AliTrackReference* tref;
599 b->SetAddress(&trackrefs);
601 Int_t tlab = TMath::Abs(t->GetLabel());
603 Int_t netr = (Int_t)treeTR->GetEntries();
604 printf("Found %d entries in TR tree\n",netr);
606 for (Int_t e = 0; e < netr; e++)
609 tref = (AliTrackReference*)trackrefs->At(0);
610 if (tref == 0x0) continue;
611 if (tref->GetTrack() != tlab) continue;
613 printf("Found %d entries in TR array\n",trackrefs->GetEntries());
615 for (Int_t i = 0; i < trackrefs->GetEntries(); i++)
617 tref = (AliTrackReference*)trackrefs->At(i);
618 if (tref->GetTrack() != tlab) continue;
622 printf("Track Ref: x %f y %f z %f\n",tref->X(),tref->Y(),tref->Z());
626 for (Int_t j = 1; j < 10; j++)
628 hxyTR->Fill(x, y+j*0.1);
629 hxyTR->Fill(x, y-j*0.1);
630 hxyTR->Fill(x+j*0.1,y);
631 hxyTR->Fill(x-j*0.1,y);
633 hxzTR->Fill(x,z-j*0.1);
634 hxzTR->Fill(x,z+j*0.1);
635 hxzTR->Fill(x-j*0.1,z);
636 hxzTR->Fill(x+j*0.1,z);
642 // hxzt->Draw("same");