// dEdx analysis by: Boris Batyunya, JINR, Boris.Batiounia@cern.ch
//-------------------------------------------------------------------------
+/* $Id$ */
+
#include <TMatrixD.h>
#include <TMath.h>
#include "AliCluster.h"
#include "AliESDtrack.h"
+#include "AliITSgeomTGeo.h"
#include "AliITStrackMI.h"
ClassImp(AliITStrackMI)
//____________________________________________________________________________
AliITStrackMI::AliITStrackMI():AliITStrackV2(),
- fNUsed(0),
- fNSkipped(0),
- fNDeadZone(0),
- fDeadZoneProbability(0),
- fReconstructed(kFALSE),
- fConstrain(kFALSE)
+fNUsed(0),
+fNSkipped(0),
+fNDeadZone(0),
+fReconstructed(kFALSE),
+fExpQ(40),
+fChi22(0),
+fdEdxMismatch(0),
+fConstrain(kFALSE),
+fGoldV0(kFALSE)
{
- for(Int_t i=0; i<kMaxLayer; i++) fClIndex[i]=-1;
- for(Int_t i=0; i<6; i++) { fNy[i]=0; fNz[i]=0; fNormQ[i]=0; fNormChi2[i]=1000;}
- for(Int_t i=0; i<12; i++) {fDy[i]=0; fDz[i]=0; fSigmaY[i]=0; fSigmaZ[i]=0; fChi2MIP[i]=0;}
+ //constructor
+ for(Int_t i=0; i<AliITSgeomTGeo::GetNLayers(); i++) fClIndex[i]=-1;
+ for(Int_t i=0; i<6; i++) { fNy[i]=0; fNz[i]=0; fNormQ[i]=0; fNormChi2[i]=1000; fDeadZoneProbability[i]=0;}
+ for(Int_t i=0; i<12; i++) {fDy[i]=0; fDz[i]=0; fSigmaY[i]=0; fSigmaZ[i]=0; fSigmaYZ[i]=0; fChi2MIP[i]=0;}
fD[0]=0; fD[1]=0;
- fExpQ=40;
- fdEdxMismatch=0;
- fChi22=0;
- fGoldV0 = kFALSE;
+ fDnorm[0]=0; fDnorm[1]=0;
}
//____________________________________________________________________________
AliITStrackMI::AliITStrackMI(AliESDtrack& t,Bool_t c) throw (const Char_t *) :
-AliITStrackV2(t,c) {
+AliITStrackV2(t,c),
+fNUsed(0),
+fNSkipped(0),
+fNDeadZone(0),
+fReconstructed(kFALSE),
+fExpQ(40),
+fChi22(0),
+fdEdxMismatch(0),
+fConstrain(kFALSE),
+fGoldV0(kFALSE) {
//------------------------------------------------------------------
// Conversion ESD track -> ITS track.
// If c==kTRUE, create the ITS track out of the constrained params.
//------------------------------------------------------------------
- fNUsed = 0;
- fReconstructed = kFALSE;
- fNSkipped =0;
- fNDeadZone = 0;
- fDeadZoneProbability = 0;
- for(Int_t i=0; i<6; i++) {fClIndex[i]=-1; fNy[i]=0; fNz[i]=0; fNormQ[i]=0; fNormChi2[i]=1000;}
- for(Int_t i=0; i<12; i++) {fDy[i]=0; fDz[i]=0; fSigmaY[i]=0; fSigmaZ[i]=0;fChi2MIP[i]=0;}
+ for(Int_t i=0; i<6; i++) {fClIndex[i]=-1; fNy[i]=0; fNz[i]=0; fNormQ[i]=0; fNormChi2[i]=1000; fDeadZoneProbability[i]=0;}
+ for(Int_t i=0; i<12; i++) {fDy[i]=0; fDz[i]=0; fSigmaY[i]=0; fSigmaZ[i]=0; fSigmaYZ[i]=0; fChi2MIP[i]=0;}
fD[0]=0; fD[1]=0;
- fExpQ=40;
- fConstrain = kFALSE;
- fdEdxMismatch=0;
- fChi22 =0;
- fGoldV0 = kFALSE;
+ fDnorm[0]=0; fDnorm[1]=0;
//if (!Invariant()) throw "AliITStrackV2: conversion failed !\n";
}
-void AliITStrackMI::UpdateESDtrack(ULong_t flags) {
- fESDtrack->UpdateTrackParams(this,flags);
- if (flags == AliESDtrack::kITSin) fESDtrack->SetITSChi2MIP(fChi2MIP);
-}
-
//____________________________________________________________________________
-AliITStrackMI::AliITStrackMI(const AliITStrackMI& t) : AliITStrackV2(t) {
+AliITStrackMI::AliITStrackMI(const AliITStrackMI& t) : AliITStrackV2(t),
+fNUsed(t.fNUsed),
+fNSkipped(t.fNSkipped),
+fNDeadZone(t.fNDeadZone),
+fReconstructed(t.fReconstructed),
+fExpQ(t.fExpQ),
+fChi22(t.fChi22),
+fdEdxMismatch(t.fdEdxMismatch),
+fConstrain(t.fConstrain),
+fGoldV0(t.fGoldV0) {
//------------------------------------------------------------------
//Copy constructor
//------------------------------------------------------------------
- fNUsed = t.fNUsed;
- fReconstructed = t.fReconstructed;
- fNSkipped = t.fNSkipped;
- fNDeadZone = t.fNDeadZone;
- fDeadZoneProbability = t.fDeadZoneProbability;
fLab = t.fLab;
fFakeRatio = t.fFakeRatio;
- fdEdxMismatch = t.fdEdxMismatch;
- fChi22 = t.fChi22;
- fGoldV0 = t.fGoldV0;;
fD[0]=t.fD[0]; fD[1]=t.fD[1];
fDnorm[0] = t.fDnorm[0]; fDnorm[1]=t.fDnorm[1];
- fExpQ= t.fExpQ;
for(Int_t i=0; i<6; i++) {
- fClIndex[i]= t.fClIndex[i]; fNy[i]=t.fNy[i]; fNz[i]=t.fNz[i]; fNormQ[i]=t.fNormQ[i]; fNormChi2[i] = t.fNormChi2[i];
+ fClIndex[i]= t.fClIndex[i]; fNy[i]=t.fNy[i]; fNz[i]=t.fNz[i]; fNormQ[i]=t.fNormQ[i]; fNormChi2[i] = t.fNormChi2[i]; fDeadZoneProbability[i]=t.fDeadZoneProbability[i];
}
for(Int_t i=0; i<12; i++) {fDy[i]=t.fDy[i]; fDz[i]=t.fDz[i];
- fSigmaY[i]=t.fSigmaY[i]; fSigmaZ[i]=t.fSigmaZ[i];fChi2MIP[i]=t.fChi2MIP[i];}
- fConstrain = t.fConstrain;
+ fSigmaY[i]=t.fSigmaY[i]; fSigmaZ[i]=t.fSigmaZ[i]; fSigmaYZ[i]=t.fSigmaYZ[i]; fChi2MIP[i]=t.fChi2MIP[i];}
//memcpy(fDy,t.fDy,6*sizeof(Float_t));
//memcpy(fDz,t.fDz,6*sizeof(Float_t));
//memcpy(fSigmaY,t.fSigmaY,6*sizeof(Float_t));
}
-Double_t AliITStrackMI::GetPredictedChi2MI(Double_t cy, Double_t cz, Double_t cerry, Double_t cerrz) const
+Double_t AliITStrackMI::GetPredictedChi2MI(Double_t cy, Double_t cz, Double_t cerry, Double_t cerrz, Double_t covyz) const
{
//-----------------------------------------------------------------
// This function calculates a predicted chi2 increment.
//-----------------------------------------------------------------
- Double_t r00=cerry*cerry, r01=0., r11=cerrz*cerrz;
- r00+=fC00; r01+=fC10; r11+=fC11;
- //
- Double_t det=r00*r11 - r01*r01;
- if (TMath::Abs(det) < 1.e-30) {
- Int_t n=GetNumberOfClusters();
- if (n>kWARN)
- Warning("GetPredictedChi2","Singular matrix (%d) !\n",n);
- return 1e10;
- }
- Double_t tmp=r00; r00=r11; r11=tmp; r01=-r01;
-
- Double_t dy=cy - fP0, dz=cz - fP1;
-
- return (dy*r00*dy + 2*r01*dy*dz + dz*r11*dz)/det;
-}
-
-//____________________________________________________________________________
-Int_t AliITStrackMI::CorrectForMaterial(Double_t d, Double_t x0) {
- //------------------------------------------------------------------
- //This function corrects the track parameters for crossed material
- //------------------------------------------------------------------
- // Double_t p2=(1.+ GetTgl()*GetTgl())/(Get1Pt()*Get1Pt());
- Double_t p2=(1.+ fP3*fP3)/(Get1Pt()*Get1Pt());
- Double_t et = p2 + GetMass()*GetMass();
- Double_t beta2=p2/et;
- et = sqrt(et);
- d*=TMath::Sqrt((1.+ fP3*fP3)/(1.- fP2*fP2));
- //d*=TMath::Sqrt(1.+ fP3*fP3 +fP2*fP2/(1.- fP2*fP2));
-
- //Multiple scattering******************
- if (d!=0) {
- Double_t theta2=14.1*14.1/(beta2*p2*1e6)*TMath::Abs(d);
- //Double_t theta2=1.0259e-6*14*14/28/(beta2*p2)*TMath::Abs(d)*9.36*2.33;
- fC22 += theta2*(1.- fP2*fP2)*(1. + fP3*fP3);
- fC33 += theta2*(1. + fP3*fP3)*(1. + fP3*fP3);
- fC43 += theta2*fP3*fP4*(1. + fP3*fP3);
- fC44 += theta2*fP3*fP4*fP3*fP4;
- }
-
- //Energy losses************************
- if (x0!=0.) {
- d*=x0;
- // Double_t dE=0.153e-3/beta2*(log(5940*beta2/(1-beta2)) - beta2)*d;
- //Double_t dE=0;
- Double_t dE = 0.265*0.153e-3*(39.2-55.6*beta2+28.7*beta2*beta2+27.41/beta2)*d;
- /*
- if (beta2/(1-beta2)>3.5*3.5){
- dE=0.153e-3/beta2*(log(3.5*5940)+0.5*log(beta2/(1-beta2)) - beta2)*d;
- }
- else{
- dE=0.153e-3/beta2*(log(5940*beta2/(1-beta2)) - beta2)*d;
- dE+=0.06e-3/(beta2*beta2)*d;
- }
- */
- fP4*=(1.- et/p2*dE);
- Double_t delta44 = (dE*fP4*et/p2);
- delta44*=delta44;
- fC44+= delta44/400.;
- }
-
- if (!Invariant()) return 0;
-
- return 1;
+ Double_t p[2]={cy, cz};
+ Double_t cov[3]={cerry*cerry, covyz, cerrz*cerrz};
+ return AliExternalTrackParam::GetPredictedChi2(p,cov);
}
//____________________________________________________________________________
-Int_t AliITStrackMI::UpdateMI(Double_t cy, Double_t cz, Double_t cerry, Double_t cerrz, Double_t chi2,UInt_t index) {
+Bool_t AliITStrackMI::UpdateMI(const AliCluster *c, Double_t chi2, Int_t index) {
//------------------------------------------------------------------
//This function updates track parameters
//------------------------------------------------------------------
- Double_t p0=fP0,p1=fP1,p2=fP2,p3=fP3,p4=fP4;
- Double_t c00=fC00;
- Double_t c10=fC10, c11=fC11;
- Double_t c20=fC20, c21=fC21, c22=fC22;
- Double_t c30=fC30, c31=fC31, c32=fC32, c33=fC33;
- Double_t c40=fC40, c41=fC41, c42=fC42, c43=fC43, c44=fC44;
-
-
- Double_t r00=cerry*cerry, r01=0., r11=cerrz*cerrz;
- r00+=fC00; r01+=fC10; r11+=fC11;
- Double_t det=r00*r11 - r01*r01;
- Double_t tmp=r00; r00=r11/det; r11=tmp/det; r01=-r01/det;
-
-
- Double_t k00=fC00*r00+fC10*r01, k01=fC00*r01+fC10*r11;
- Double_t k10=fC10*r00+fC11*r01, k11=fC10*r01+fC11*r11;
- Double_t k20=fC20*r00+fC21*r01, k21=fC20*r01+fC21*r11;
- Double_t k30=fC30*r00+fC31*r01, k31=fC30*r01+fC31*r11;
- Double_t k40=fC40*r00+fC41*r01, k41=fC40*r01+fC41*r11;
-
- Double_t dy=cy - fP0, dz=cz - fP1;
+ Double_t dy=c->GetY() - GetY(), dz=c->GetZ() - GetZ();
Int_t layer = (index & 0xf0000000) >> 28;
fDy[layer] = dy;
fDz[layer] = dz;
- fSigmaY[layer] = TMath::Sqrt(cerry*cerry+fC00);
- fSigmaZ[layer] = TMath::Sqrt(cerrz*cerrz+fC11);
-
- Double_t sf=fP2 + k20*dy + k21*dz;
-
- fP0 += k00*dy + k01*dz;
- fP1 += k10*dy + k11*dz;
- fP2 = sf;
- fP3 += k30*dy + k31*dz;
- fP4 += k40*dy + k41*dz;
-
- Double_t c01=fC10, c02=fC20, c03=fC30, c04=fC40;
- Double_t c12=fC21, c13=fC31, c14=fC41;
+ fSigmaY[layer] = TMath::Sqrt(c->GetSigmaY2()+GetSigmaY2());
+ fSigmaZ[layer] = TMath::Sqrt(c->GetSigmaZ2()+GetSigmaZ2());
+ fSigmaYZ[layer] = c->GetSigmaYZ()+GetSigmaZY();
- fC00-=k00*fC00+k01*fC10; fC10-=k00*c01+k01*fC11;
- fC20-=k00*c02+k01*c12; fC30-=k00*c03+k01*c13;
- fC40-=k00*c04+k01*c14;
- fC11-=k10*c01+k11*fC11;
- fC21-=k10*c02+k11*c12; fC31-=k10*c03+k11*c13;
- fC41-=k10*c04+k11*c14;
-
- fC22-=k20*c02+k21*c12; fC32-=k20*c03+k21*c13;
- fC42-=k20*c04+k21*c14;
-
- fC33-=k30*c03+k31*c13;
- fC43-=k30*c04+k31*c14;
-
- fC44-=k40*c04+k41*c14;
-
- if (!Invariant()) {
- fP0=p0; fP1=p1; fP2=p2; fP3=p3; fP4=p4;
- fC00=c00;
- fC10=c10; fC11=c11;
- fC20=c20; fC21=c21; fC22=c22;
- fC30=c30; fC31=c31; fC32=c32; fC33=c33;
- fC40=c40; fC41=c41; fC42=c42; fC43=c43; fC44=c44;
- return 0;
- }
-
- if (chi2<0) return 1;
- Int_t n=GetNumberOfClusters();
- fIndex[n]=index;
- SetNumberOfClusters(n+1);
- SetChi2(GetChi2()+chi2);
-
- return 1;
+ return Update(c,chi2,index);
}
Int_t AliITStrackMI::GetProlongationFast(Double_t alp, Double_t xk,Double_t &y, Double_t &z)
//-----------------------------------------------------------------------------
//get fast prolongation
//-----------------------------------------------------------------------------
- Double_t ca=TMath::Cos(alp-fAlpha), sa=TMath::Sin(alp-fAlpha);
- Double_t cf=TMath::Sqrt(1.- fP2*fP2);
+ Double_t ca=TMath::Cos(alp-GetAlpha()), sa=TMath::Sin(alp-GetAlpha());
+ Double_t cf=TMath::Sqrt((1.-GetSnp())*(1.+GetSnp()));
// **** rotation **********************
- y= -fX*sa + fP0*ca;
+ y= -GetX()*sa + GetY()*ca;
// **** translation ******************
- Double_t dx = xk- fX*ca - fP0*sa;
- Double_t f1=fP2*ca - cf*sa, f2=f1 + fP4*dx;
+ Double_t dx = xk- GetX()*ca - GetY()*sa;
+ Double_t f1=GetSnp()*ca - cf*sa, f2=f1 + GetC()*dx;
if (TMath::Abs(f2) >= 0.9999) {
return 0;
}
- Double_t r1=TMath::Sqrt(1.- f1*f1), r2=TMath::Sqrt(1.- f2*f2);
+ Double_t r1=TMath::Sqrt((1.-f1)*(1.+f1)), r2=TMath::Sqrt((1.-f2)*(1.+f2));
y += dx*(f1+f2)/(r1+r2);
- z = fP1+dx*(f1+f2)/(f1*r2 + f2*r1)*fP3;
+ z = GetZ()+dx*(f1+f2)/(f1*r2 + f2*r1)*GetTgl();
return 1;
}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff