#include "AliTRDcluster.h"
#include "AliTRDtrack.h"
#include "AliTRDclusterCorrection.h"
+#include "AliTrackReference.h"
ClassImp(AliTRDtracklet)
ClassImp(AliTRDtrack)
- AliTRDtracklet::AliTRDtracklet():fY(0),fX(0),fAlpha(0),fSigma2(0),fP0(0),fP1(0),fNFound(0),fNCross(0),fPlane(0),fExpectedSigma2(0),fChi2(0){
+ AliTRDtracklet::AliTRDtracklet():fY(0),fZ(0),fX(0),fAlpha(0),fSigma2(0),fP0(0),fP1(0),fNFound(0),fNCross(0),fPlane(0),fExpectedSigma2(0),fChi2(0),fTilt(0),fMaxPos(0),fMaxPos4(0),fMaxPos5(0){
}
//_____________________________________________________________________________
fX=xref;
fY=xx[0]; fZ=xx[1]; fE=xx[2]; fT=xx[3]; fC=xx[4];
+
+ SaveLocalConvConst();
fCyy=cc[0];
fCzy=cc[1]; fCzz=cc[2];
SetNumberOfClusters(1);
fdEdx=0.;
+ fdEdxT=0.;
+ fDE=0.;
for (Int_t i=0;i<kNPlane;i++){
fdEdxPlane[i] = 0.;
fTimBinPlane[i] = -1;
fIndex[i] = 0;
fIndexBackup[i] = 0; //bacup indexes MI
}
+ for (Int_t i=0;i<3;i++) { fBudget[i]=0;};
fBackupTrack =0;
}
SetChi2(t.GetChi2());
fdEdx=t.fdEdx;
+ fdEdxT=t.fdEdxT;
+ fDE=t.fDE;
for (Int_t i=0;i<kNPlane;i++){
fdEdxPlane[i] = t.fdEdxPlane[i];
fTimBinPlane[i] = t.fTimBinPlane[i];
+ fTracklets[i] = t.fTracklets[i];
}
fLhElectron = 0.0;
fIndexBackup[i] = 0; //MI backup indexes
}
for (Int_t i=0;i<6;i++){
- fTracklets[i]=t.fTracklets[i];
+ fTracklets[i] = t.fTracklets[i];
}
+ for (Int_t i=0;i<3;i++) { fBudget[i]=t.fBudget[i];};
}
//_____________________________________________________________________________
fX=x;
- x = GetConvConst();
-
fY=p[0];
fZ=p[1];
- fT=p[3];
+ fT=p[3]; x=GetLocalConvConst();
fC=p[4]/x;
fE=fC*fX - p[2];
fIndexBackup[i] = 0; // MI backup indexes
}
+ for (Int_t i=0;i<3;i++) { fBudget[i]=0;};
}
//_____________________________________________________________________________
AliTRDtrack::AliTRDtrack(const AliESDtrack& t)
//
// Constructor from AliESDtrack
//
-
+ fDE =0;
SetLabel(t.GetLabel());
SetChi2(0.);
SetMass(t.GetMass());
//Conversion of the covariance matrix
Double_t c[15]; t.GetExternalCovariance(c);
if (t.GetStatus()&AliESDtrack::kTRDbackup){
- t.GetTRDExternalParameters(x,fAlpha,p,c);
+ t.GetOuterExternalParameters(fAlpha,x,p);
+ t.GetOuterExternalCovariance(c);
if (fAlpha < -TMath::Pi()) fAlpha += 2*TMath::Pi();
else if (fAlpha >= TMath::Pi()) fAlpha -= 2*TMath::Pi();
}
fX=x;
- x = GetConvConst();
-
fY=p[0];
- fZ=p[1];
- fT=p[3];
+ fZ=p[1]; SaveLocalConvConst();
+ fT=p[3]; x=GetLocalConvConst();
fC=p[4]/x;
fE=fC*fX - p[2];
// fIndex[i] = 0; //MI store indexes
}
+ for (Int_t i=0;i<3;i++) { fBudget[i]=0;};
if ((t.GetStatus()&AliESDtrack::kTIME) == 0) return;
StartTimeIntegral();
Double_t times[10]; t.GetIntegratedTimes(times); SetIntegratedTimes(times);
}
+
+AliTRDtrack * AliTRDtrack::MakeTrack(const AliTrackReference *ref, Double_t mass)
+{
+ //
+ // Make dummy track from the track reference
+ // negative mass means opposite charge
+ //
+ Double_t xx[5];
+ Double_t cc[15];
+ for (Int_t i=0;i<15;i++) cc[i]=0;
+ Double_t x = ref->X(), y = ref->Y(), z = ref->Z();
+ Double_t alpha = TMath::ATan2(y,x);
+ Double_t xr = TMath::Sqrt(x*x+y*y);
+ xx[0] = 0;
+ xx[1] = z;
+ xx[3] = ref->Pz()/ref->Pt();
+ Float_t b[3];
+ Float_t xyz[3]={x,y,z};
+ Float_t convConst = 0;
+ (AliKalmanTrack::GetFieldMap())->Field(xyz,b);
+ convConst=1000/0.299792458/(1e-13 - b[2]);
+ xx[4] = 1./(convConst*ref->Pt());
+ if (mass<0) xx[4]*=-1.; // negative mass - negative direction
+ Double_t lcos = (x*ref->Px()+y*ref->Py())/(xr*ref->Pt());
+ Double_t lsin = TMath::Sin(TMath::ACos(lcos));
+ if (mass<0) lsin*=-1.;
+ xx[2] = xr*xx[4]-lsin;
+ AliTRDcluster cl;
+ AliTRDtrack * track = new AliTRDtrack(&cl,100,xx,cc,xr,alpha);
+ track->SetMass(TMath::Abs(mass));
+ track->StartTimeIntegral();
+ return track;
+}
+
+
AliTRDtrack::~AliTRDtrack()
{
//
Float_t AliTRDtrack::StatusForTOF()
{
+
+ Float_t res = (0.2 + 0.8*(fN/(fNExpected+5.)))*(0.4+0.6*fTracklets[5].GetN()/20.);
+ res *= (0.25+0.8*40./(40.+fBudget[2]));
+ return res;
+
Int_t status=0;
- if (fNRotate>2) return -1; // sure it's stopped
if (GetNumberOfClusters()<20) return 0; //
-
- //comp->fTree->SetAlias("nlast2","track.fTracklets[5].fNFound+track.fTracklets[4].fNFound");
- //comp->fTree->SetAlias("goldtrack","abs((track.fTracklets[5].fP1+track.fTracklets[4].fP1))<0.5&&nlast2>14");
- Int_t nlast2 = fTracklets[5].fNFound+fTracklets[4].fNFound;
- if (TMath::Abs((fTracklets[5].fP1+fTracklets[4].fP1))<0.3 &&nlast2>20) return 3;
- if (TMath::Abs((fTracklets[5].fP1+fTracklets[4].fP1))<0.3 &&nlast2>14) return 2;
- if (TMath::Abs((fTracklets[5].fP1+fTracklets[4].fP1))<0.5 &&nlast2>14) return 1;
+ if (fN>110&&fChi2/(Float_t(fN))<3) return 3; //gold
+ if (fNLast>30&&fChi2Last/(Float_t(fNLast))<3) return 3; //gold
+ if (fNLast>20&&fChi2Last/(Float_t(fNLast))<2) return 3; //gold
+ if (fNLast/(fNExpectedLast+3.)>0.8 && fChi2Last/Float_t(fNLast)<5&&fNLast>20) return 2; //silber
+ if (fNLast>5 &&((fNLast+1.)/(fNExpectedLast+1.))>0.8&&fChi2Last/(fNLast-5.)<6) return 1;
+ //
return status;
}
//
// This function returns external representation of the covriance matrix.
//
- Double_t a=GetConvConst();
+ Double_t a=GetLocalConvConst();
Double_t c22=fX*fX*fCcc-2*fX*fCce+fCee;
Double_t c32=fX*fCct-fCte;
}
Float_t sorted[kMAX_CLUSTERS_PER_TRACK];
+ for (i=0; i < nc; i++) {
+ sorted[i]=fdQdl[i];
+ }
+ Int_t nl=Int_t(low*nc), nu=Int_t(up*nc);
+ Float_t dedx=0;
+ //for (i=nl; i<=nu; i++) dedx += sorted[i];
+ //dedx /= (nu-nl+1);
+ for (i=0; i<nc; i++) dedx += sorted[i]; // ADDED by PS
+ if((nu-nl)) dedx /= (nu-nl); // ADDED by PS
+
+ //SetdEdx(dedx);
+ //
+ // now real truncated mean
for (i=0; i < nc; i++) {
sorted[i]=TMath::Abs(fdQdl[i]);
}
Int_t * index = new Int_t[nc];
TMath::Sort(nc, sorted, index,kFALSE);
-
- Int_t nl=Int_t(low*nc), nu=Int_t(up*nc);
- Float_t dedx=0;
+ dedx=0;
for (i=nl; i<=nu; i++) dedx += sorted[index[i]];
dedx /= (nu-nl+1);
-
+ fdEdxT = dedx;
+ delete [] index;
SetdEdx(dedx);
+
}
// << GetPt() << "\t" << GetLabel() << "\t" << GetMass() << endl;
return 0;
}
+ Double_t lcc=GetLocalConvConst();
// track Length measurement [SR, GSI, 17.02.2003]
Double_t oldX = fX, oldY = fY, oldZ = fZ;
fX=x2;
+ //Change of the magnetic field *************
+ SaveLocalConvConst();
+ cc=fC;
+ fC*=lcc/GetLocalConvConst();
+ fE+=fX*(fC-cc);
+
//Multiple scattering ******************
Double_t d=sqrt((x1-fX)*(x1-fX)+(y1-fY)*(y1-fY)+(z1-fZ)*(z1-fZ));
Double_t p2=(1.+ GetTgl()*GetTgl())/(Get1Pt()*Get1Pt());
Double_t beta2=p2/(p2 + GetMass()*GetMass());
Double_t theta2=14.1*14.1/(beta2*p2*1e6)*d/x0*rho;
- theta2*= 3.; // magic const - to normalize pools - waiting for geo manager
- if (p2>2.) beta2*= 0.4; // magic const - theta2 for relativistic particles
- // - not valid for electrons
+
Double_t ey=fC*fX - fE, ez=fT;
Double_t xz=fC*ez, zz1=ez*ez+1, xy=fE+ey;
//Energy losses************************
if((5940*beta2/(1-beta2+1e-10) - beta2) < 0) return 0;
- Double_t dE=0.153e-3/beta2*(log(5940*beta2/(1-beta2+1e-10)) - beta2)*d*rho;
- dE *= 1.2; // magic const - to normalize pools - waiting for geo manager
+ Double_t dE=0.153e-3/beta2*(log(5940*beta2/(1-beta2+1e-10)) - beta2)*d*rho;
+ //
+ // suspicious part - think about it ?
+ Double_t kinE = TMath::Sqrt(p2);
+ if (dE>0.8*kinE) dE = 0.8*kinE; //
+ if (dE<0) dE = 0.0; // not valid region for Bethe bloch
+ //
+ //
+ fDE+=dE;
if (x1 < x2) dE=-dE;
cc=fC;
fC*=(1.- sqrt(p2+GetMass()*GetMass())/p2*dE);
fE+=fX*(fC-cc);
- //
- Double_t deltac = fC-cc;
- fCcc += 4*deltac*deltac; // fluctuation of energy losses
- fCee += 4*fX*fX*deltac*deltac; // local angle unchanged
- fCce += 4*fX*deltac*deltac; // correlation 1
- //
+ // Double_t sigmade = 0.1*dE*TMath::Sqrt(TMath::Sqrt(1+fT*fT)*90./(d+0.0001)); // 20 percent fluctuation - normalized to some length
+ Double_t sigmade = 0.07*TMath::Sqrt(TMath::Abs(dE)); // energy loss fluctuation
+ Double_t sigmac2 = sigmade*sigmade*fC*fC*(p2+GetMass()*GetMass())/(p2*p2);
+ fCcc += sigmac2;
+ fCee += fX*fX*sigmac2;
+
// track time measurement [SR, GSI 17.02.2002]
if (x1 < x2)
if (IsStartedTimeIntegral()) {
- Double_t l2 = (fX-oldX)*(fX-oldX) + (fY-oldY)*(fY-oldY) + (fZ-oldZ)*(fZ-oldZ);
- AddTimeStep(TMath::Sqrt(l2));
+ Double_t l2 = TMath::Sqrt((fX-oldX)*(fX-oldX) + (fY-oldY)*(fY-oldY) + (fZ-oldZ)*(fZ-oldZ));
+ if (TMath::Abs(l2*fC)>0.0001){
+ // make correction for curvature if neccesary
+ l2 = 0.5*TMath::Sqrt((fX-oldX)*(fX-oldX) + (fY-oldY)*(fY-oldY));
+ l2 = 2*TMath::ASin(l2*fC)/fC;
+ l2 = TMath::Sqrt(l2*l2+(fZ-oldZ)*(fZ-oldZ));
+ }
+ AddTimeStep(l2);
}
return 1;
r00=c->GetSigmaY2()+errang+add, r01=0., r11=c->GetSigmaZ2()*xu_factor;
r00+=(fCyy+2.0*h01*fCzy+h01*h01*fCzz);
+ r01+=(fCzy+h01*fCzz);
+ r11+=fCzz;
- r01+=(fCzy+h01*fCzz);
det=r00*r11 - r01*r01;
tmp=r00; r00=r11/det; r11=tmp/det; r01=-r01/det;
}
Double_t tangent = TMath::Sqrt(tangent2);
if ((fC*fX-fE)<0) tangent*=-1;
- Double_t errsys =(0.025*0.025*20)*(1+tangent2); //systematic error part
+ // Double_t correction = 0*plane;
+ Double_t errang = tangent2*0.04; //
+ Double_t errsys =0.025*0.025*20; //systematic error part
+ Float_t extend =1;
+ if (c->GetNPads()==4) extend=2;
+ //if (c->GetNPads()==5) extend=3;
+ //if (c->GetNPads()==6) extend=3;
+ //if (c->GetQ()<15) return 1;
/*
if (corrector!=0){
}
*/
//
- Double_t r00=(c->GetSigmaY2()+errsys), r01=0., r11=c->GetSigmaZ2()*10000.;
+ // Double_t padlength = TMath::Sqrt(c->GetSigmaZ2()*12.);
+
+ Double_t r00=(c->GetSigmaY2() +errang+errsys)*extend, r01=0., r11=c->GetSigmaZ2()*10000.;
r00+=fCyy; r01+=fCzy; r11+=fCzz;
Double_t det=r00*r11 - r01*r01;
Double_t tmp=r00; r00=r11/det; r11=tmp/det; r01=-r01/det;
fC = cur;
}
else {
- // Double_t padlength = TMath::Sqrt(c->GetSigmaZ2()*12);
+ Double_t padlength = TMath::Sqrt(c->GetSigmaZ2()*12);
Double_t xu_factor = 1000.; // empirical factor set by C.Xu
// in the first tilt version
dy=c->GetY() - fY; dz=c->GetZ() - fZ;
+ //dy=dy+h01*dz+correction;
Double_t tiltdz = dz;
+ if (TMath::Abs(tiltdz)>padlength/2.) {
+ tiltdz = TMath::Sign(padlength/2,dz);
+ }
+ // dy=dy+h01*dz;
dy=dy+h01*tiltdz;
- Double_t s00 = c->GetSigmaY2()+errsys; // error pad
+ Double_t add=0;
+ if (TMath::Abs(dz)>padlength/2.){
+ //Double_t dy2 = c->GetY() - fY;
+ //Double_t sign = (dz>0) ? -1.: 1.;
+ //dy2-=h01*sign*padlength/2.;
+ //dy = dy2;
+ add =1;
+ }
+ Double_t s00 = (c->GetSigmaY2()+errang)*extend+errsys+add; // error pad
Double_t s11 = c->GetSigmaZ2()*xu_factor; // error pad-row
//
r00 = fCyy + 2*fCzy*h01 + fCzz*h01*h01+s00;
-
-
//_____________________________________________________________________________
Int_t AliTRDtrack::UpdateMI(const AliTRDtracklet &tracklet)
{
}
+
//_____________________________________________________________________________
-Int_t AliTRDtrack::Rotate(Double_t alpha)
+Int_t AliTRDtrack::Rotate(Double_t alpha, Bool_t absolute)
{
// Rotates track parameters in R*phi plane
+ // if absolute rotation alpha is in global system
+ // otherwise alpha rotation is relative to the current rotation angle
- fNRotate++;
+ if (absolute) {
+ alpha -= fAlpha;
+ }
+ else{
+ fNRotate++;
+ }
fAlpha += alpha;
if (fAlpha<-TMath::Pi()) fAlpha += 2*TMath::Pi();
// return 0 if not exist
Double_t c1=fC*fX - fE;
- if (TMath::Abs(c1)>0.9) return 0;
+ if (TMath::Abs(c1)>1.) return 0;
Double_t r1=TMath::Sqrt(1.- c1*c1);
Double_t c2=fC*xk - fE;
- if (TMath::Abs(c2)>0.9) return 0;
+ if (TMath::Abs(c2)>1.) return 0;
Double_t r2=TMath::Sqrt(1.- c2*c2);
y =fY + (xk-fX)*(c1+c2)/(r1+r2);
z =fZ + (xk-fX)*(c1+c2)/(c1*r2 + c2*r1)*fT;
return 1;
}
+
+
+Int_t AliTRDtrack::PropagateToX(Double_t xr, Double_t step)
+{
+ //
+ // Propagate track to given x position
+ // works inside of the 20 degree segmentation (local cooordinate frame for TRD , TPC, TOF)
+ //
+ // material budget from geo manager
+ //
+ Double_t xyz0[3], xyz1[3],y,z;
+ const Double_t alphac = TMath::Pi()/9.;
+ const Double_t talphac = TMath::Tan(alphac*0.5);
+ // critical alpha - cross sector indication
+ //
+ Double_t dir = (fX>xr) ? -1.:1.;
+ // direction +-
+ for (Double_t x=fX+dir*step;dir*x<dir*xr;x+=dir*step){
+ //
+ GetGlobalXYZ(xyz0[0],xyz0[1],xyz0[2]);
+ GetProlongation(x,y,z);
+ xyz1[0] = x*TMath::Cos(fAlpha)+y*TMath::Sin(fAlpha);
+ xyz1[1] = x*TMath::Sin(fAlpha)-y*TMath::Cos(fAlpha);
+ xyz1[2] = z;
+ Double_t param[7];
+ AliKalmanTrack::MeanMaterialBudget(xyz0,xyz1,param);
+ //
+ if (param[0]>0&¶m[1]>0) PropagateTo(x,param[1],param[0]);
+ if (fY>fX*talphac){
+ Rotate(-alphac);
+ }
+ if (fY<-fX*talphac){
+ Rotate(alphac);
+ }
+ }
+ //
+ PropagateTo(xr);
+ return 0;
+}
+
+
+Int_t AliTRDtrack::PropagateToR(Double_t r,Double_t step)
+{
+ //
+ // propagate track to the radial position
+ // rotation always connected to the last track position
+ //
+ Double_t xyz0[3], xyz1[3],y,z;
+ Double_t radius = TMath::Sqrt(fX*fX+fY*fY);
+ Double_t dir = (radius>r) ? -1.:1.; // direction +-
+ //
+ for (Double_t x=radius+dir*step;dir*x<dir*r;x+=dir*step){
+ GetGlobalXYZ(xyz0[0],xyz0[1],xyz0[2]);
+ Double_t alpha = TMath::ATan2(xyz0[1],xyz0[0]);
+ Rotate(alpha,kTRUE);
+ GetGlobalXYZ(xyz0[0],xyz0[1],xyz0[2]);
+ GetProlongation(x,y,z);
+ xyz1[0] = x*TMath::Cos(alpha)+y*TMath::Sin(alpha);
+ xyz1[1] = x*TMath::Sin(alpha)-y*TMath::Cos(alpha);
+ xyz1[2] = z;
+ Double_t param[7];
+ AliKalmanTrack::MeanMaterialBudget(xyz0,xyz1,param);
+ if (param[1]<=0) param[1] =100000000;
+ PropagateTo(x,param[1],param[0]);
+ }
+ GetGlobalXYZ(xyz0[0],xyz0[1],xyz0[2]);
+ Double_t alpha = TMath::ATan2(xyz0[1],xyz0[0]);
+ Rotate(alpha,kTRUE);
+ GetGlobalXYZ(xyz0[0],xyz0[1],xyz0[2]);
+ GetProlongation(r,y,z);
+ xyz1[0] = r*TMath::Cos(alpha)+y*TMath::Sin(alpha);
+ xyz1[1] = r*TMath::Sin(alpha)-y*TMath::Cos(alpha);
+ xyz1[2] = z;
+ Double_t param[7];
+ AliKalmanTrack::MeanMaterialBudget(xyz0,xyz1,param);
+ //
+ if (param[1]<=0) param[1] =100000000;
+ PropagateTo(r,param[1],param[0]);
+ return 0;
+}
+
+
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