/* $Id$ */
-#include <Riostream.h>
-#include <TMath.h>
#include <TVector2.h>
-#include "AliESDtrack.h"
+#include "AliTracker.h"
+
#include "AliTRDgeometry.h"
#include "AliTRDcluster.h"
#include "AliTRDtrack.h"
-#include "AliTRDtracklet.h"
+#include "AliTRDcalibDB.h"
+#include "Cal/AliTRDCalPID.h"
ClassImp(AliTRDtrack)
,fSeedLab(-1)
,fdEdx(0)
,fDE(0)
- ,fAlpha(0)
- ,fX(0)
+ ,fPIDquality(0)
+ ,fClusterOwner(kFALSE)
+ ,fPIDmethod(kLQ)
,fStopped(kFALSE)
- ,fY(0)
- ,fZ(0)
- ,fE(0)
- ,fT(0)
- ,fC(0)
- ,fCyy(1e10)
- ,fCzy(0)
- ,fCzz(1e10)
- ,fCey(0)
- ,fCez(0)
- ,fCee(1e10)
- ,fCty(0)
- ,fCtz(0)
- ,fCte(0)
- ,fCtt(1e10)
- ,fCcy(0)
- ,fCcz(0)
- ,fCce(0)
- ,fCct(0)
- ,fCcc(1e10)
,fLhElectron(0)
,fNWrong(0)
,fNRotate(0)
// AliTRDtrack default constructor
//
- Int_t i = 0;
- Int_t j = 0;
- UInt_t k = 0;
-
- for (i = 0; i < kNplane; i++) {
- for (j = 0; j < kNslice; j++) {
- fdEdxPlane[i][j] = 0;
+ for (Int_t i = 0; i < kNplane; i++) {
+ for (Int_t j = 0; j < kNslice; j++) {
+ fdEdxPlane[i][j] = 0.0;
}
fTimBinPlane[i] = -1;
+ fMom[i] = -1.;
+ fSnp[i] = 0.;
+ fTgl[i] = 0.;
+ fTrackletIndex[i] = -1;
+ }
+ for(int ispec=0; ispec<AliPID::kSPECIES; ispec++) {
+ fPID[ispec] = 1.0 / AliPID::kSPECIES;
}
- for (k = 0; k < kMAXCLUSTERSPERTRACK; k++) {
- fIndex[k] = 0;
- fIndexBackup[k] = 0;
- fdQdl[k] = 0;
+ for (UInt_t i = 0; i < kMAXCLUSTERSPERTRACK; i++) {
+ fIndex[i] = 0;
+ fIndexBackup[i] = 0;
+ fdQdl[i] = 0;
+ fClusters[i] = 0x0;
}
- for (i = 0; i < 3; i++) {
- fBudget[i] = 0;
+ for (Int_t i = 0; i < 3; i++) {
+ fBudget[i] = 0;
}
}
//_____________________________________________________________________________
-AliTRDtrack::AliTRDtrack(const AliTRDcluster *c, UInt_t index,
- const Double_t xx[5], const Double_t cc[15],
- Double_t xref, Double_t alpha)
- :AliKalmanTrack()
+AliTRDtrack::AliTRDtrack(AliTRDcluster *c, Int_t index
+ , const Double_t p[5], const Double_t cov[15]
+ , Double_t x, Double_t alpha)
+ :AliKalmanTrack()
,fSeedLab(-1)
- ,fdEdx(0.0)
- ,fDE(0.0)
- ,fAlpha(alpha)
- ,fX(xref)
+ ,fdEdx(0)
+ ,fDE(0)
+ ,fPIDquality(0)
+ ,fClusterOwner(kFALSE)
+ ,fPIDmethod(kLQ)
,fStopped(kFALSE)
- ,fY(xx[0])
- ,fZ(xx[1])
- ,fE(xx[2])
- ,fT(xx[3])
- ,fC(xx[4])
- ,fCyy(cc[0])
- ,fCzy(cc[1])
- ,fCzz(cc[2])
- ,fCey(cc[3])
- ,fCez(cc[4])
- ,fCee(cc[5])
- ,fCty(cc[6])
- ,fCtz(cc[7])
- ,fCte(cc[8])
- ,fCtt(cc[9])
- ,fCcy(cc[10])
- ,fCcz(cc[11])
- ,fCce(cc[12])
- ,fCct(cc[13])
- ,fCcc(cc[14])
- ,fLhElectron(0.0)
+ ,fLhElectron(0)
,fNWrong(0)
,fNRotate(0)
,fNCross(0)
,fBackupTrack(0x0)
{
//
- // AliTRDtrack main constructor
+ // The main AliTRDtrack constructor.
//
- Int_t i = 0;
- Int_t j = 0;
- UInt_t k = 0;
+ Double_t cnv = 1.0 / (GetBz() * kB2C);
- if (fAlpha < -TMath::Pi()) {
- fAlpha += 2.0 * TMath::Pi();
- }
- if (fAlpha >= TMath::Pi()) {
- fAlpha -= 2.0 * TMath::Pi();
- }
+ Double_t pp[5] = { p[0]
+ , p[1]
+ , x*p[4] - p[2]
+ , p[3]
+ , p[4]*cnv };
- SaveLocalConvConst();
+ Double_t c22 = x*x*cov[14] - 2*x*cov[12] + cov[ 5];
+ Double_t c32 = x*cov[13] - cov[ 8];
+ Double_t c20 = x*cov[10] - cov[ 3];
+ Double_t c21 = x*cov[11] - cov[ 4];
+ Double_t c42 = x*cov[14] - cov[12];
- fIndex[0] = index;
+ Double_t cc[15] = { cov[ 0]
+ , cov[ 1], cov[ 2]
+ , c20, c21, c22
+ , cov[ 6], cov[ 7], c32, cov[ 9]
+ , cov[10]*cnv, cov[11]*cnv, c42*cnv, cov[13]*cnv, cov[14]*cnv*cnv };
+
+ Set(x,alpha,pp,cc);
SetNumberOfClusters(1);
+ fIndex[0] = index;
+ fClusters[0] = c;
- for (i = 0; i < kNplane; i++) {
- for (j = 0; j < kNslice; j++) {
- fdEdxPlane[i][j] = 0;
+ for (Int_t i = 0; i < kNplane; i++) {
+ for (Int_t j = 0; j < kNslice; j++) {
+ fdEdxPlane[i][j] = 0.0;
}
fTimBinPlane[i] = -1;
+ fMom[i] = -1.;
+ fSnp[i] = 0.;
+ fTgl[i] = 0.;
+ fTrackletIndex[i] = -1;
+ }
+ for(int ispec=0; ispec<AliPID::kSPECIES; ispec++) {
+ fPID[ispec] = 1.0 / AliPID::kSPECIES;
}
Double_t q = TMath::Abs(c->GetQ());
- Double_t s = fX * fC - fE;
- Double_t t = fT;
- if (s*s < 1.0) {
+ Double_t s = GetSnp();
+ Double_t t = GetTgl();
+ if (s*s < 1) {
q *= TMath::Sqrt((1-s*s)/(1+t*t));
}
- fdQdl[0] = q;
-
- for (k = 1; k < kMAXCLUSTERSPERTRACK; k++) {
- fdQdl[k] = 0;
- fIndex[k] = 0;
- fIndexBackup[k] = 0;
+
+ fdQdl[0] = q;
+ for (UInt_t i = 1; i < kMAXCLUSTERSPERTRACK; i++) {
+ fdQdl[i] = 0;
+ fIndex[i] = 0;
+ fIndexBackup[i] = 0;
+ fClusters[i] = 0x0;
}
- for (i = 0; i < 3; i++) {
+ for (Int_t i = 0; i < 3;i++) {
fBudget[i] = 0;
}
}
//_____________________________________________________________________________
-AliTRDtrack::AliTRDtrack(const AliTRDtrack &t)
+AliTRDtrack::AliTRDtrack(const AliTRDtrack &t/*, const Bool_t owner*/)
:AliKalmanTrack(t)
- ,fSeedLab(t.fSeedLab)
+ ,fSeedLab(t.GetSeedLabel())
,fdEdx(t.fdEdx)
,fDE(t.fDE)
- ,fAlpha(t.fAlpha)
- ,fX(t.fX)
+ ,fPIDquality(t.fPIDquality)
+ ,fClusterOwner(kTRUE)
+ ,fPIDmethod(t.fPIDmethod)
,fStopped(t.fStopped)
- ,fY(t.fY)
- ,fZ(t.fZ)
- ,fE(t.fE)
- ,fT(t.fT)
- ,fC(t.fC)
- ,fCyy(t.fCyy)
- ,fCzy(t.fCzy)
- ,fCzz(t.fCzz)
- ,fCey(t.fCey)
- ,fCez(t.fCez)
- ,fCee(t.fCee)
- ,fCty(t.fCty)
- ,fCtz(t.fCtz)
- ,fCte(t.fCte)
- ,fCtt(t.fCtt)
- ,fCcy(t.fCcy)
- ,fCcz(t.fCcz)
- ,fCce(t.fCce)
- ,fCct(t.fCct)
- ,fCcc(t.fCcc)
- ,fLhElectron(0.0)
+ ,fLhElectron(0)
,fNWrong(t.fNWrong)
,fNRotate(t.fNRotate)
,fNCross(t.fNCross)
// Copy constructor.
//
- Int_t i = 0;
- Int_t j = 0;
- UInt_t k = 0;
-
- for (i = 0; i < kNplane; i++) {
- for (j = 0; j < kNslice; j++) {
+ for (Int_t i = 0; i < kNplane; i++) {
+ for (Int_t j = 0; j < kNslice; j++) {
fdEdxPlane[i][j] = t.fdEdxPlane[i][j];
}
fTimBinPlane[i] = t.fTimBinPlane[i];
fTracklets[i] = t.fTracklets[i];
+ fMom[i] = t.fMom[i];
+ fSnp[i] = t.fSnp[i];
+ fTgl[i] = t.fTgl[i];
+ fTrackletIndex[i] = t.fTrackletIndex[i];
}
Int_t n = t.GetNumberOfClusters();
- for (i = 0; i < n; i++) {
+ SetNumberOfClusters(n);
+
+ for (Int_t i = 0; i < n; i++) {
fIndex[i] = t.fIndex[i];
fIndexBackup[i] = t.fIndex[i];
fdQdl[i] = t.fdQdl[i];
- }
- for (k = n; k < kMAXCLUSTERSPERTRACK; k++) {
- fdQdl[k] = 0;
- fIndex[k] = 0;
- fIndexBackup[k] = 0;
+ if (fClusterOwner && t.fClusters[i]) {
+ fClusters[i] = new AliTRDcluster(*(t.fClusters[i]));
+ }
+ else {
+ fClusters[i] = t.fClusters[i];
+ }
}
- for (i = 0; i < 6; i++) {
- fTracklets[i] = t.fTracklets[i];
+ for (UInt_t i = n; i < kMAXCLUSTERSPERTRACK; i++) {
+ fdQdl[i] = 0;
+ fIndex[i] = 0;
+ fIndexBackup[i] = 0;
+ fClusters[i] = 0x0;
}
- for (i = 0; i < 3; i++) {
- fBudget[i] = t.fBudget[i];
+ for (Int_t i = 0; i < 3;i++) {
+ fBudget[i] = t.fBudget[i];
}
-}
+ for(Int_t ispec = 0; ispec<AliPID::kSPECIES; ispec++) fPID[ispec] = t.fPID[ispec];
+}
//_____________________________________________________________________________
-AliTRDtrack::AliTRDtrack(const AliKalmanTrack &t, Double_t alpha)
+AliTRDtrack::AliTRDtrack(const AliKalmanTrack &t, Double_t /*alpha*/)
:AliKalmanTrack(t)
,fSeedLab(-1)
,fdEdx(t.GetPIDsignal())
,fDE(0)
- ,fAlpha(alpha)
- ,fX(0)
+ ,fPIDquality(0)
+ ,fClusterOwner(kFALSE)
+ ,fPIDmethod(kLQ)
,fStopped(kFALSE)
- ,fY(0)
- ,fZ(0)
- ,fE(0)
- ,fT(0)
- ,fC(0)
- ,fCyy(0)
- ,fCzy(0)
- ,fCzz(0)
- ,fCey(0)
- ,fCez(0)
- ,fCee(0)
- ,fCty(0)
- ,fCtz(0)
- ,fCte(0)
- ,fCtt(0)
- ,fCcy(0)
- ,fCcz(0)
- ,fCce(0)
- ,fCct(0)
- ,fCcc(0)
,fLhElectron(0.0)
,fNWrong(0)
,fNRotate(0)
,fBackupTrack(0x0)
{
//
- // Constructor from AliTPCtrack or AliITStrack .
+ // Constructor from AliTPCtrack or AliITStrack
//
- Int_t i = 0;
- Int_t j = 0;
- UInt_t k = 0;
-
+ SetLabel(t.GetLabel());
SetChi2(0.0);
+ SetMass(t.GetMass());
SetNumberOfClusters(0);
- for (i = 0; i < kNplane; i++) {
- for (j = 0; j < kNslice; j++) {
+ for (Int_t i = 0; i < kNplane; i++) {
+ for (Int_t j = 0; j < kNslice; j++) {
fdEdxPlane[i][j] = 0.0;
}
fTimBinPlane[i] = -1;
+ fMom[i] = -1.;
+ fSnp[i] = 0.;
+ fTgl[i] = 0.;
+ fTrackletIndex[i] = -1;
}
-
- if (fAlpha < -TMath::Pi()) {
- fAlpha += 2.0 * TMath::Pi();
- }
- else if (fAlpha >= TMath::Pi()) {
- fAlpha -= 2.0 * TMath::Pi();
+ for(int ispec=0; ispec<AliPID::kSPECIES; ispec++) {
+ fPID[ispec] = 1.0 / AliPID::kSPECIES;
}
- Double_t x;
- Double_t p[5];
- t.GetExternalParameters(x,p);
- fX = x;
- fY = p[0];
- fZ = p[1];
- fT = p[3];
- x = GetLocalConvConst();
- fC = p[4] / x;
- fE = fC * fX - p[2];
-
- // Conversion of the covariance matrix
- Double_t c[15];
- t.GetExternalCovariance(c);
- c[10] /= x;
- c[11] /= x;
- c[12] /= x;
- c[13] /= x;
- c[14] /= x*x;
-
- Double_t c22 = fX*fX * c[14] - 2.0*fX*c[12] + c[ 5];
- Double_t c32 = fX * c[13] - c[ 8];
- Double_t c20 = fX * c[10] - c[ 3];
- Double_t c21 = fX * c[11] - c[ 4];
- Double_t c42 = fX * c[14] - c[12];
-
- fCyy = c[ 0];
- fCzy = c[ 1]; fCzz = c[ 2];
- fCey = c20; fCez = c21; fCee = c22;
- fCty = c[ 6]; fCtz = c[ 7]; fCte = c32; fCtt = c[ 9];
- fCcy = c[10]; fCcz = c[11]; fCce = c42; fCct = c[13]; fCcc = c[14];
-
- for (k = 0; k < kMAXCLUSTERSPERTRACK; k++) {
- fdQdl[k] = 0;
- fIndex[k] = 0;
- fIndexBackup[k] = 0;
+ for (UInt_t i = 0; i < kMAXCLUSTERSPERTRACK; i++) {
+ fdQdl[i] = 0;
+ fIndex[i] = 0;
+ fIndexBackup[i] = 0;
+ fClusters[i] = 0x0;
}
- for (i = 0; i < 3; i++) {
+ for (Int_t i = 0; i < 3; i++) {
fBudget[i] = 0;
}
-}
+}
//_____________________________________________________________________________
-AliTRDtrack::AliTRDtrack(const AliESDtrack &t)
- :AliKalmanTrack()
+AliTRDtrack::AliTRDtrack(const AliESDtrack &t)
+ :AliKalmanTrack()
,fSeedLab(-1)
,fdEdx(t.GetTRDsignal())
,fDE(0)
- ,fAlpha(t.GetAlpha())
- ,fX(0)
+ ,fPIDquality(0)
+ ,fClusterOwner(kFALSE)
+ ,fPIDmethod(kLQ)
,fStopped(kFALSE)
- ,fY(0)
- ,fZ(0)
- ,fE(0)
- ,fT(0)
- ,fC(0)
- ,fCyy(1e10)
- ,fCzy(0)
- ,fCzz(1e10)
- ,fCey(0)
- ,fCez(0)
- ,fCee(1e10)
- ,fCty(0)
- ,fCtz(0)
- ,fCte(0)
- ,fCtt(1e10)
- ,fCcy(0)
- ,fCcz(0)
- ,fCce(0)
- ,fCct(0)
- ,fCcc(1e10)
- ,fLhElectron(0.0)
+ ,fLhElectron(0)
,fNWrong(0)
,fNRotate(0)
,fNCross(0)
,fNLast(0)
,fNExpectedLast(0)
,fNdedx(0)
- ,fChi2Last(0.0)
+ ,fChi2Last(1e10)
,fBackupTrack(0x0)
{
//
// Constructor from AliESDtrack
//
- Int_t i = 0;
- Int_t j = 0;
- UInt_t k = 0;
-
SetLabel(t.GetLabel());
- SetChi2(0.);
+ SetChi2(0.0);
SetMass(t.GetMass());
SetNumberOfClusters(t.GetTRDclusters(fIndex));
Int_t ncl = t.GetTRDclusters(fIndexBackup);
- for (k = ncl; k < kMAXCLUSTERSPERTRACK; k++) {
- fIndexBackup[k] = 0;
- fIndex[k] = 0;
+ for (UInt_t i = ncl; i < kMAXCLUSTERSPERTRACK; i++) {
+ fIndexBackup[i] = 0;
+ fIndex[i] = 0;
}
- for (i = 0; i < kNplane; i++) {
- for (j = 0; j < kNslice; j++) {
- fdEdxPlane[i][j] = t.GetTRDsignals(i,j);
+ for (Int_t i = 0; i < kNplane; i++) {
+ for (Int_t j = 0; j < kNslice; j++) {
+ fdEdxPlane[i][j] = t.GetTRDslice(i,j);
}
fTimBinPlane[i] = t.GetTRDTimBin(i);
- }
-
- if (fAlpha < -TMath::Pi()) {
- fAlpha += 2.0 * TMath::Pi();
- }
- else if (fAlpha >= TMath::Pi()) {
- fAlpha -= 2.0 * TMath::Pi();
- }
-
- // Conversion of the covariance matrix
- Double_t x;
- Double_t p[5];
- t.GetExternalParameters(x,p);
- Double_t c[15];
- t.GetExternalCovariance(c);
- if (t.GetStatus() & AliESDtrack::kTRDbackup) {
- t.GetOuterExternalParameters(fAlpha,x,p);
- t.GetOuterExternalCovariance(c);
- if (fAlpha < -TMath::Pi()) {
- fAlpha += 2.0 * TMath::Pi();
- }
- else if (fAlpha >= TMath::Pi()) {
- fAlpha -= 2.0 * TMath::Pi();
+ fMom[i] = -1.;
+ fSnp[i] = 0.;
+ fTgl[i] = 0.;
+ fTrackletIndex[i] = -1;
+ }
+
+ const AliExternalTrackParam *par = &t;
+ if (t.GetStatus() & AliESDtrack::kTRDbackup) {
+ par = t.GetOuterParam();
+ if (!par) {
+ AliError("No backup info!");
+ par = &t;
}
}
+ Set(par->GetX()
+ ,par->GetAlpha()
+ ,par->GetParameter()
+ ,par->GetCovariance());
- fX = x;
- fY = p[0];
- fZ = p[1];
- SaveLocalConvConst();
- fT = p[3];
- x = GetLocalConvConst();
- fC = p[4] / x;
- fE = fC*fX - p[2];
-
- c[10] /= x;
- c[11] /= x;
- c[12] /= x;
- c[13] /= x;
- c[14] /= x*x;
-
- Double_t c22 = fX*fX * c[14] - 2.0*fX*c[12] + c[ 5];
- Double_t c32 = fX * c[13] - c[ 8];
- Double_t c20 = fX * c[10] - c[ 3];
- Double_t c21 = fX * c[11] - c[ 4];
- Double_t c42 = fX * c[14] - c[12];
-
- fCyy = c[ 0];
- fCzy = c[ 1]; fCzz = c[ 2];
- fCey = c20; fCez = c21; fCee = c22;
- fCty = c[ 6]; fCtz = c[ 7]; fCte = c32; fCtt = c[ 9];
- fCcy = c[10]; fCcz = c[11]; fCce = c42; fCct = c[13]; fCcc = c[14];
-
- for (k = 0; k < kMAXCLUSTERSPERTRACK; k++) {
- fdQdl[k] = 0;
- //fIndex[k] = 0; //MI store indexes
+ for (UInt_t i = 0; i < kMAXCLUSTERSPERTRACK; i++) {
+ fdQdl[i] = 0;
+ fClusters[i] = 0x0;
}
- for (i = 0; i < 3; i++) {
+ for (Int_t i = 0; i < 3; i++) {
fBudget[i] = 0;
}
+ for(int ispec=0; ispec<AliPID::kSPECIES; ispec++) {
+ fPID[ispec] = t.GetTRDpid(ispec);
+ }
+
if ((t.GetStatus() & AliESDtrack::kTIME) == 0) {
return;
}
if (fBackupTrack) {
delete fBackupTrack;
}
- fBackupTrack = 0;
+ fBackupTrack = 0x0;
-}
-
-//____________________________________________________________________________
-AliTRDtrack &AliTRDtrack::operator=(const AliTRDtrack &t)
-{
- //
- // Assignment operator
- //
-
- fLhElectron = 0.0;
- fNWrong = 0;
- fStopped = 0;
- fNRotate = 0;
- fNExpected = 0;
- fNExpectedLast = 0;
- fNdedx = 0;
- fNCross = 0;
- fNLast = 0;
- fChi2Last = 0;
- fBackupTrack = 0;
-
- fAlpha = t.GetAlpha();
- if (fAlpha < -TMath::Pi()) {
- fAlpha += 2.0 * TMath::Pi();
- }
- else if (fAlpha >= TMath::Pi()) {
- fAlpha -= 2.0 * TMath::Pi();
+ if (fClusterOwner) {
+ UInt_t icluster = 0;
+ while ((icluster < kMAXCLUSTERSPERTRACK) && fClusters[icluster]) {
+ delete fClusters[icluster];
+ fClusters[icluster] = 0x0;
+ icluster++;
+ }
}
- return *this;
-
}
//____________________________________________________________________________
// Definition of res ????
Float_t res = (0.2 + 0.8 * (fN / (fNExpected + 5.0)))
- * (0.4 + 0.6 * fTracklets[5].GetN() / 20.0);
+ * (0.4 + 0.6 * fTracklets[5].GetN() / 20.0);
res *= (0.25 + 0.8 * 40.0 / (40.0 + fBudget[2]));
return res;
- // This part of the function is never reached ????
- // What defines these parameters ????
- Int_t status = 0;
- if (GetNumberOfClusters() < 20) return 0;
- if ((fN > 110) &&
- (fChi2/(Float_t(fN)) < 3.0)) return 3; // Gold
- if ((fNLast > 30) &&
- (fChi2Last/(Float_t(fNLast)) < 3.0)) return 3; // Gold
- if ((fNLast > 20) &&
- (fChi2Last/(Float_t(fNLast)) < 2.0)) return 3; // Gold
- if ((fNLast/(fNExpectedLast+3.0) > 0.8) &&
- (fChi2Last/Float_t(fNLast) < 5.0) &&
- (fNLast > 20)) return 2; // Silver
- if ((fNLast > 5) &&
- (((fNLast+1.0)/(fNExpectedLast+1.0)) > 0.8) &&
- (fChi2Last/(fNLast-5.0) < 6.0)) return 1;
-
- return status;
-
}
-
-//_____________________________________________________________________________
-void AliTRDtrack::GetExternalCovariance(Double_t cc[15]) const
-{
- //
- // This function returns external representation of the covriance matrix.
- //
-
- Double_t a = GetLocalConvConst();
-
- Double_t c22 = fX*fX*fCcc - 2.0*fX*fCce+fCee;
- Double_t c32 = fX*fCct-fCte;
- Double_t c20 = fX*fCcy-fCey;
- Double_t c21 = fX*fCcz-fCez;
- Double_t c42 = fX*fCcc-fCce;
-
- cc[ 0]=fCyy;
- cc[ 1]=fCzy; cc[ 2]=fCzz;
- cc[ 3]=c20; cc[ 4]=c21; cc[ 5]=c22;
- cc[ 6]=fCty; cc[ 7]=fCtz; cc[ 8]=c32; cc[ 9]=fCtt;
- cc[10]=fCcy*a; cc[11]=fCcz*a; cc[12]=c42*a; cc[13]=fCct*a; cc[14]=fCcc*a*a;
-
-}
-
-//_____________________________________________________________________________
-void AliTRDtrack::GetCovariance(Double_t cc[15]) const
-{
- //
- // Returns the track covariance matrix
- //
-
- cc[ 0]=fCyy;
- cc[ 1]=fCzy; cc[ 2]=fCzz;
- cc[ 3]=fCey; cc[ 4]=fCez; cc[ 5]=fCee;
- cc[ 6]=fCcy; cc[ 7]=fCcz; cc[ 8]=fCce; cc[ 9]=fCcc;
- cc[10]=fCty; cc[11]=fCtz; cc[12]=fCte; cc[13]=fCct; cc[14]=fCtt;
-
-}
//_____________________________________________________________________________
Int_t AliTRDtrack::Compare(const TObject *o) const
//
AliTRDtrack *t = (AliTRDtrack *) o;
- // Double_t co=t->GetSigmaY2();
- // Double_t c =GetSigmaY2();
Double_t co = TMath::Abs(t->GetC());
Double_t c = TMath::Abs(GetC());
else if (c < co) {
return -1;
}
+
return 0;
}
// Calculates the truncated dE/dx within the "low" and "up" cuts.
//
- Int_t i = 0;
-
// Array to sort the dEdx values according to amplitude
Float_t sorted[kMAXCLUSTERSPERTRACK];
-
- // Number of clusters used for dedx
- Int_t nc = fNdedx;
-
+ fdEdx = 0.0;
+
// Require at least 10 clusters for a dedx measurement
- if (nc < 10) {
- SetdEdx(0);
+ if (fNdedx < 10) {
return;
}
- // Lower and upper bound
- Int_t nl = Int_t(low * nc);
- Int_t nu = Int_t( up * nc);
-
// Can fdQdl be negative ????
- for (i = 0; i < nc; i++) {
+ for (Int_t i = 0; i < fNdedx; i++) {
sorted[i] = TMath::Abs(fdQdl[i]);
}
-
// Sort the dedx values by amplitude
- Int_t *index = new Int_t[nc];
- TMath::Sort(nc,sorted,index,kFALSE);
+ Int_t *index = new Int_t[fNdedx];
+ TMath::Sort(fNdedx, sorted, index, kFALSE);
- // Sum up the truncated charge between nl and nu
- Float_t dedx = 0.0;
- for (i = nl; i <= nu; i++) {
- dedx += sorted[index[i]];
+ // Sum up the truncated charge between lower and upper bounds
+ Int_t nl = Int_t(low * fNdedx);
+ Int_t nu = Int_t( up * fNdedx);
+ for (Int_t i = nl; i <= nu; i++) {
+ fdEdx += sorted[index[i]];
}
- dedx /= (nu - nl + 1.0);
- SetdEdx(dedx);
+ fdEdx /= (nu - nl + 1.0);
- delete [] index;
+ delete[] index;
}
//_____________________________________________________________________________
-Int_t AliTRDtrack::PropagateTo(Double_t xk,Double_t x0,Double_t rho)
+void AliTRDtrack::CookdEdxTimBin(const Int_t/* tid*/)
{
//
- // Propagates a track of particle with mass=pm to a reference plane
- // defined by x=xk through media of density=rho and radiationLength=x0
- //
-
- if (xk == fX) {
- return 1;
+ // Set fdEdxPlane and fTimBinPlane and also get the
+ // Time bin for Max. Cluster
+ //
+ // Authors:
+ // Prashant Shukla (shukla@physi.uni-heidelberg.de)
+ // Alexandru Bercuci (A.Bercuci@gsi.de)
+ //
+
+ // Max charge in chamber
+ Double_t maxcharge[kNplane];
+ // Number of clusters attached to track per chamber and slice
+ Int_t nCluster[kNplane][kNslice];
+ // Number of time bins in chamber
+ Int_t ntb = AliTRDcalibDB::Instance()->GetNumberOfTimeBins();
+ Int_t plane; // Plane of current cluster
+ Int_t tb; // Time bin of current cluster
+ Int_t slice; // Current slice
+ AliTRDcluster *cluster = 0x0; // Pointer to current cluster
+
+ // Reset class and local counters/variables
+ for (Int_t iPlane = 0; iPlane < kNplane; iPlane++) {
+ fTimBinPlane[iPlane] = -1;
+ maxcharge[iPlane] = 0.0;
+ for (Int_t iSlice = 0; iSlice < kNslice; iSlice++) {
+ fdEdxPlane[iPlane][iSlice] = 0.0;
+ nCluster[iPlane][iSlice] = 0;
+ }
}
- if (TMath::Abs(fC*xk - fE) >= 0.9) {
- return 0;
- }
+ // Start looping over clusters attached to this track
+ for (Int_t iClus = 0; iClus < GetNumberOfClusters(); iClus++) {
- Double_t lcc = GetLocalConvConst();
+ cluster = fClusters[iClus]; //(AliTRDcluster*)tracker->GetCluster(fIndex[iClus]);
+ if (!cluster) continue;
- Double_t oldX = fX;
- Double_t oldY = fY;
- Double_t oldZ = fZ;
+ // Read info from current cluster
+ plane = AliTRDgeometry::GetLayer(cluster->GetDetector());
+ if (plane < 0 || plane >= kNplane) {
+ AliError(Form("Wrong plane %d", plane));
+ continue;
+ }
- Double_t x1 = fX;
- Double_t x2 = x1 + (xk - x1);
- Double_t dx = x2 - x1;
- Double_t y1 = fY;
- Double_t z1 = fZ;
- Double_t c1 = fC*x1 - fE;
- if ((c1*c1) > 1) {
- return 0;
- }
+ tb = cluster->GetLocalTimeBin();
+ if ((tb < 0) || (tb >= ntb)) {
+ AliWarning(Form("time bin < 0 or > %d in cluster %d", ntb, iClus));
+ AliInfo(Form("dQ/dl %f", fdQdl[iClus]));
+ continue;
+ }
+
+ slice = tb * kNslice / ntb;
- Double_t r1 = TMath::Sqrt(1.0 - c1*c1);
- Double_t c2 = fC*x2 - fE;
- if ((c2*c2) > 1) {
- return 0;
- }
+ fdEdxPlane[plane][slice] += fdQdl[iClus];
+ if (fdQdl[iClus] > maxcharge[plane]) {
+ maxcharge[plane] = fdQdl[iClus];
+ fTimBinPlane[plane] = tb;
+ }
- Double_t r2 = TMath::Sqrt(1.0 - c2*c2);
-
- fY += dx*(c1+c2) / (r1+r2);
- fZ += dx*(c1+c2) / (c1*r2 + c2*r1) * fT;
-
- // f = F - 1
- Double_t rr = r1+r2;
- Double_t cc = c1+c2;
- Double_t xx = x1+x2;
- Double_t f02 = -dx*(2*rr + cc*(c1/r1 + c2/r2))/(rr*rr);
- Double_t f04 = dx*(rr*xx + cc*(c1*x1/r1+c2*x2/r2))/(rr*rr);
- Double_t cr = c1*r2+c2*r1;
- Double_t f12 = -dx*fT*(2*cr + cc*(c2*c1/r1-r1 + c1*c2/r2-r2))/(cr*cr);
- Double_t f13 = dx*cc/cr;
- Double_t f14 = dx*fT*(cr*xx-cc*(r1*x2-c2*c1*x1/r1+r2*x1-c1*c2*x2/r2))/(cr*cr);
-
- // b = C*ft
- Double_t b00 = f02*fCey + f04*fCcy;
- Double_t b01 = f12*fCey + f14*fCcy + f13*fCty;
- Double_t b10 = f02*fCez + f04*fCcz;
- Double_t b11 = f12*fCez + f14*fCcz + f13*fCtz;
- Double_t b20 = f02*fCee + f04*fCce;
- Double_t b21 = f12*fCee + f14*fCce + f13*fCte;
- Double_t b30 = f02*fCte + f04*fCct;
- Double_t b31 = f12*fCte + f14*fCct + f13*fCtt;
- Double_t b40 = f02*fCce + f04*fCcc;
- Double_t b41 = f12*fCce + f14*fCcc + f13*fCct;
-
- // a = f*b = f*C*ft
- Double_t a00 = f02*b20 + f04*b40;
- Double_t a01 = f02*b21 + f04*b41;
- Double_t a11 = f12*b21 + f14*b41 + f13*b31;
-
- // F*C*Ft = C + (a + b + bt)
- fCyy += a00 + 2.0*b00;
- fCzy += a01 + b01 + b10;
- fCey += b20;
- fCty += b30;
- fCcy += b40;
- fCzz += a11 + 2.0*b11;
- fCez += b21;
- fCtz += b31;
- fCcz += b41;
-
- fX = x2;
-
- // Change of the magnetic field
- SaveLocalConvConst();
- cc = fC;
- fC *= lcc / GetLocalConvConst();
- fE += fX * (fC-cc);
-
- // Multiple scattering
- // What is 14.1 ????
- Double_t d = TMath::Sqrt((x1-fX)*(x1-fX) + (y1-fY)*(y1-fY) + (z1-fZ)*(z1-fZ));
- Double_t p2 = (1.0 + GetTgl()*GetTgl()) / (Get1Pt()*Get1Pt());
- Double_t beta2 = p2 / (p2 + GetMass()*GetMass());
- Double_t theta2 = 14.1*14.1 / (beta2*p2*1e6) * d / x0 * rho;
- Double_t ey = fC*fX - fE;
- Double_t ez = fT;
- Double_t xz = fC*ez;
- Double_t zz1 = ez*ez + 1.0;
- Double_t xy = fE + ey;
-
- fCee += (2.0*ey*ez*ez*fE + 1.0 - ey*ey + ez*ez + fE*fE*ez*ez) * theta2;
- fCte += ez*zz1*xy*theta2;
- fCtt += zz1*zz1*theta2;
- fCce += xz*ez*xy*theta2;
- fCct += xz*zz1*theta2;
- fCcc += xz*xz*theta2;
-
- // Energy losses
- // What is 5940.0 ???? and 0.153e-3 ????
- if ((5940.0*beta2 / (1.0 - beta2 + 1e-10) - beta2) < 0.0) {
- return 0;
- }
- Double_t dE = 0.153e-3/beta2 * (TMath::Log(5940.0*beta2 / (1.0 - beta2 + 1e-10)) - beta2)
- * d * rho;
- Float_t budget = d * rho;
- fBudget[0] +=budget;
-
- // Suspicious part - think about it ????
- Double_t kinE = TMath::Sqrt(p2);
- if (dE > 0.8 * kinE) {
- dE = 0.8 * kinE;
- }
- if (dE < 0.0) {
- dE = 0.0; // Not valid region for Bethe bloch
- }
- fDE += dE;
- if (x1 < x2) {
- dE = -dE;
- }
- cc = fC;
- fC *= (1.0 - TMath::Sqrt(p2 + GetMass()*GetMass()) / p2 * dE);
- fE += fX * (fC - cc);
-
- // Energy loss fluctuation
- // Why 0.07 ????
- Double_t sigmade = 0.07 * TMath::Sqrt(TMath::Abs(dE));
- Double_t sigmac2 = sigmade*sigmade * fC*fC * (p2 + GetMass()*GetMass()) / (p2*p2);
- fCcc += sigmac2;
- fCee += fX*fX * sigmac2;
-
- // Track time measurement
- if (x1 < x2) {
- if (IsStartedTimeIntegral()) {
- Double_t l2 = TMath::Sqrt((fX-oldX)*(fX-oldX)
- + (fY-oldY)*(fY-oldY)
- + (fZ-oldZ)*(fZ-oldZ));
- if (TMath::Abs(l2*fC) > 0.0001){
- // <ake correction for curvature if neccesary
- l2 = 0.5 * TMath::Sqrt((fX-oldX)*(fX-oldX)
- + (fY-oldY)*(fY-oldY));
- l2 = 2.0 * TMath::ASin(l2 * fC) / fC;
- l2 = TMath::Sqrt(l2*l2 + (fZ-oldZ)*(fZ-oldZ));
+ nCluster[plane][slice]++;
+
+ } // End of loop over cluster
+
+ // Normalize fdEdxPlane to number of clusters and set track segments
+ for (Int_t iPlane = 0; iPlane < kNplane; iPlane++) {
+ for (Int_t iSlice = 0; iSlice < kNslice; iSlice++) {
+ if (nCluster[iPlane][iSlice]) {
+ fdEdxPlane[iPlane][iSlice] /= nCluster[iPlane][iSlice];
}
- AddTimeStep(l2);
}
}
- return 1;
-
-}
+}
//_____________________________________________________________________________
-Int_t AliTRDtrack::Update(const AliTRDcluster *c, Double_t chisq
- , UInt_t index, Double_t h01)
+void AliTRDtrack::CookdEdxNN(Float_t *dedx)
{
//
- // Assignes a found cluster to the track and updates track information
+ // This function calcuates the input for the neural networks
+ // which are used for the PID.
//
-
- Bool_t fNoTilt = kTRUE;
- // What is 0.003 ????
- if (TMath::Abs(h01) > 0.003) {
- fNoTilt = kFALSE;
- }
-
- // Add angular effect to the error contribution
- Float_t tangent2 = (fC*fX-fE) * (fC*fX-fE);
- if (tangent2 < 0.90000){
- tangent2 = tangent2 / (1.0 - tangent2);
- }
- // What is 0.04 ????
- Float_t errang = tangent2 * 0.04;
- Float_t padlength = TMath::Sqrt(c->GetSigmaZ2() * 12.0);
-
- Double_t r00 = c->GetSigmaY2() + errang;
- Double_t r01 = 0.0;
- Double_t r11 = c->GetSigmaZ2() * 100.0;
- 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;
-
- Double_t k00 = fCyy*r00 + fCzy*r01;
- Double_t k01 = fCyy*r01 + fCzy*r11;
- Double_t k10 = fCzy*r00 + fCzz*r01;
- Double_t k11 = fCzy*r01 + fCzz*r11;
- Double_t k20 = fCey*r00 + fCez*r01;
- Double_t k21 = fCey*r01 + fCez*r11;
- Double_t k30 = fCty*r00 + fCtz*r01;
- Double_t k31 = fCty*r01 + fCtz*r11;
- Double_t k40 = fCcy*r00 + fCcz*r01;
- Double_t k41 = fCcy*r01 + fCcz*r11;
-
- Double_t dy = c->GetY() - fY;
- Double_t dz = c->GetZ() - fZ;
- Double_t cur = fC + k40*dy + k41*dz;
- Double_t eta = fE + k20*dy + k21*dz;
-
- if (fNoTilt) {
-
- if (TMath::Abs(cur*fX-eta) >= 0.9) {
- return 0;
- }
- fY += k00*dy + k01*dz;
- fZ += k10*dy + k11*dz;
- fE = eta;
- fC = cur;
-
- }
- else {
-
- // Empirical factor set by C.Xu in the first tilt version
- // Is this factor still ok ????
- Double_t xuFactor = 100.0;
- dy = c->GetY() - fY;
- dz = c->GetZ() - fZ;
- dy = dy + h01*dz;
-
- Float_t add = 0.0;
- if (TMath::Abs(dz) > padlength/2.0) {
- Float_t dy2 = c->GetY() - fY;
- Float_t sign = (dz > 0.0) ? -1.0 : 1.0;
- dy2 += h01 * sign * padlength/2.0;
- dy = dy2;
- add = 0.0;
+
+ //number of time bins in chamber
+ Int_t ntb = AliTRDcalibDB::Instance()->GetNumberOfTimeBins();
+
+ Int_t plane; // plane of current cluster
+ Int_t tb; // time bin of current cluster
+ Int_t slice; // curent slice
+ AliTRDcluster *cluster = 0x0; // pointer to current cluster
+ const Int_t kMLPscale = 16000; // scaling of the MLP input to be smaller than 1
+
+ // Reset class and local contors/variables
+ for (Int_t iPlane = 0; iPlane < kNplane; iPlane++){
+ for (Int_t iSlice = 0; iSlice < kNMLPslice; iSlice++) {
+ *(dedx + (kNMLPslice * iPlane) + iSlice) = 0.0;
}
-
- r00 = c->GetSigmaY2() + errang + add;
- r01 = 0.0;
- r11 = c->GetSigmaZ2() * xuFactor;
- r00 += (fCyy + 2.0*h01*fCzy + h01*h01*fCzz);
- r01 += (fCzy + h01*fCzz);
- r11 += fCzz;
-
- det = r00*r11 - r01*r01;
- tmp = r00;
- r00 = r11/det;
- r11 = tmp/det;
- r01 = -r01/det;
-
- k00 = fCyy*r00 + fCzy * (r01 + h01*r00);
- k01 = fCyy*r01 + fCzy * (r11 + h01*r01);
- k10 = fCzy*r00 + fCzz * (r01 + h01*r00);
- k11 = fCzy*r01 + fCzz * (r11 + h01*r01);
- k20 = fCey*r00 + fCez * (r01 + h01*r00);
- k21 = fCey*r01 + fCez * (r11 + h01*r01);
- k30 = fCty*r00 + fCtz * (r01 + h01*r00);
- k31 = fCty*r01 + fCtz * (r11 + h01*r01);
- k40 = fCcy*r00 + fCcz * (r01 + h01*r00);
- k41 = fCcy*r01 + fCcz * (r11 + h01*r01);
-
- cur = fC + k40*dy + k41*dz;
- eta = fE + k20*dy + k21*dz;
- if (TMath::Abs(cur*fX - eta) >= 0.9) {
- return 0;
- }
-
- fY += k00*dy + k01*dz;
- fZ += k10*dy + k11*dz;
- fE = eta;
- fT += k30*dy + k31*dz;
- fC = cur;
-
- k01 += h01*k00;
- k11 += h01*k10;
- k21 += h01*k20;
- k31 += h01*k30;
- k41 += h01*k40;
-
}
- Double_t c01 = fCzy;
- Double_t c02 = fCey;
- Double_t c03 = fCty;
- Double_t c04 = fCcy;
- Double_t c12 = fCez;
- Double_t c13 = fCtz;
- Double_t c14 = fCcz;
-
- fCyy -= k00*fCyy + k01*fCzy;
- fCzy -= k00*c01 + k01*fCzz;
- fCey -= k00*c02 + k01*c12;
- fCty -= k00*c03 + k01*c13;
- fCcy -= k00*c04 + k01*c14;
-
- fCzz -= k10*c01 + k11*fCzz;
- fCez -= k10*c02 + k11*c12;
- fCtz -= k10*c03 + k11*c13;
- fCcz -= k10*c04 + k11*c14;
-
- fCee -= k20*c02 + k21*c12;
- fCte -= k20*c03 + k21*c13;
- fCce -= k20*c04 + k21*c14;
-
- fCtt -= k30*c03 + k31*c13;
- fCct -= k40*c03 + k41*c13;
-
- fCcc -= k40*c04 + k41*c14;
+ // Start looping over clusters attached to this track
+ for (Int_t iClus = 0; iClus < GetNumberOfClusters(); iClus++) {
- Int_t n = GetNumberOfClusters();
- fIndex[n] = index;
- SetNumberOfClusters(n+1);
+ cluster = fClusters[iClus]; //(AliTRDcluster*)tracker->GetCluster(fIndex[iClus]);
+ if (!cluster) {
+ continue;
+ }
+
+ // Read info from current cluster
+ plane = AliTRDgeometry::GetLayer(cluster->GetDetector());
+ if (plane < 0 || plane >= kNplane) {
+ AliError(Form("Wrong plane %d",plane));
+ continue;
+ }
- SetChi2(GetChi2()+chisq);
+ tb = cluster->GetLocalTimeBin();
+ if (tb == 0 || tb >= ntb) {
+ AliWarning(Form("time bin 0 or > %d in cluster %d",ntb,iClus));
+ AliInfo(Form("dQ/dl %f",fdQdl[iClus]));
+ continue;
+ }
- return 1;
+ slice = tb * kNMLPslice / ntb;
+
+ *(dedx+(kNMLPslice * plane) + slice) += fdQdl[iClus]/kMLPscale;
+
+ } // End of loop over cluster
-}
+}
//_____________________________________________________________________________
-Int_t AliTRDtrack::UpdateMI(const AliTRDcluster *c, Double_t chisq
- , UInt_t index, Double_t h01
- , Int_t /*plane*/)
+void AliTRDtrack::SetTrackSegmentDirMom(const Int_t plane)
{
//
- // Assignes found cluster to the track and updates track information
+ // Set the momenta for a track segment in a given plane
//
- Bool_t fNoTilt = kTRUE;
- if (TMath::Abs(h01) > 0.003) {
- fNoTilt = kFALSE;
+ if ((plane < 0) ||
+ (plane>= kNplane)) {
+ AliError(Form("Trying to access out of range plane (%d)", plane));
+ return;
}
+
+ fSnp[plane] = GetSnp();
+ fTgl[plane] = GetTgl();
+ Double_t p[3];
+ GetPxPyPz(p);
+ fMom[plane] = TMath::Sqrt(p[0]*p[0] + p[1]*p[1] + p[2]*p[2]);
+}
+
+//_____________________________________________________________________________
+Float_t AliTRDtrack::GetTrackLengthPlane(Int_t plane) const
+{
+ //
+ // Calculate the track length of a track segment in a given plane
//
- // Add angular effect to the error contribution and make correction
- // Still needed ????
- // AliTRDclusterCorrection *corrector = AliTRDclusterCorrection::GetCorrection();
- //
- Double_t tangent2 = (fC*fX-fE) * (fC*fX-fE);
- if (tangent2 < 0.9) {
- tangent2 = tangent2 / (1.0 - tangent2);
- }
- Double_t tangent = TMath::Sqrt(tangent2);
- if ((fC*fX-fE) < 0.0) {
- tangent *= -1.0;
+ if ((plane < 0) ||
+ (plane >= kNplane)) {
+ return 0.0;
}
- // Where are the parameters from ????
- Double_t errang = tangent2 * 0.04;
- Double_t errsys = 0.025*0.025 * 20.0; // Systematic error part
+ return (AliTRDgeometry::AmThick() + AliTRDgeometry::DrThick())
+ / TMath::Sqrt((1.0 - fSnp[plane]*fSnp[plane])
+ / (1.0 + fTgl[plane]*fTgl[plane]));
- Float_t extend = 1.0;
- if (c->GetNPads() == 4) extend = 2.0;
+}
- /////////////////////////////////////////////////////////////////////////////
+//_____________________________________________________________________________
+Bool_t AliTRDtrack::CookPID(Int_t &pidQuality)
+{
//
- // Is this still needed or will it be needed ????
+ // This function calculates the PID probabilities based on TRD signals
//
- //if (c->GetNPads() == 5) extend = 3.0;
- //if (c->GetNPads() == 6) extend = 3.0;
- //if (c->GetQ() < 15) {
- // return 1;
- //}
+ // The method produces probabilities based on the charge
+ // and the position of the maximum time bin in each layer.
+ // The dE/dx information can be used as global charge or 2 to 3
+ // slices. Check AliTRDCalPID and AliTRDCalPIDRefMaker for the actual
+ // implementation.
+ //
+ // Author
+ // Alex Bercuci (A.Bercuci@gsi.de) 2nd May 2007
//
- // Will this be needed ????
- /*
- if (corrector !=0 ) {
- //if (0){
- correction = corrector->GetCorrection(plane,c->GetLocalTimeBin(),tangent);
- if (TMath::Abs(correction)>0){
- //if we have info
- errang = corrector->GetSigma(plane,c->GetLocalTimeBin(),tangent);
- errang *= errang;
- errang += tangent2*0.04;
- }
- }
- */
- //
- // Double_t padlength = TMath::Sqrt(c->GetSigmaZ2()*12.);
- /////////////////////////////////////////////////////////////////////////////
-
- Double_t r00 = (c->GetSigmaY2() + errang + errsys) * extend;
- Double_t r01 = 0.0;
- Double_t r11 = c->GetSigmaZ2()*10000.0;
- 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;
-
- Double_t k00 = fCyy*r00 + fCzy*r01;
- Double_t k01 = fCyy*r01 + fCzy*r11;
- Double_t k10 = fCzy*r00 + fCzz*r01;
- Double_t k11 = fCzy*r01 + fCzz*r11;
- Double_t k20 = fCey*r00 + fCez*r01;
- Double_t k21 = fCey*r01 + fCez*r11;
- Double_t k30 = fCty*r00 + fCtz*r01;
- Double_t k31 = fCty*r01 + fCtz*r11;
- Double_t k40 = fCcy*r00 + fCcz*r01;
- Double_t k41 = fCcy*r01 + fCcz*r11;
-
- Double_t dy = c->GetY() - fY;
- Double_t dz = c->GetZ() - fZ;
- Double_t cur = fC + k40*dy + k41*dz;
- Double_t eta = fE + k20*dy + k21*dz;
-
- if (fNoTilt) {
-
- if (TMath::Abs(cur*fX - eta) >= 0.9) {
- return 0;
- }
-
- fY += k00*dy + k01*dz;
- fZ += k10*dy + k11*dz;
- fE = eta;
- fC = cur;
+ AliTRDcalibDB *calibration = AliTRDcalibDB::Instance();
+ if (!calibration) {
+ AliError("No access to calibration data");
+ return kFALSE;
}
- else {
-
- Double_t padlength = TMath::Sqrt(c->GetSigmaZ2() * 12.0);
- // Empirical factor set by C.Xu in the first tilt version
- Double_t xuFactor = 1000.0;
-
- dy = c->GetY() - fY;
- dz = c->GetZ() - fZ;
- //dy = dy + h01*dz + correction; // Still needed ????
-
- Double_t tiltdz = dz;
- if (TMath::Abs(tiltdz) > padlength/2.0) {
- tiltdz = TMath::Sign(padlength/2.0,dz);
- }
- dy = dy + h01*tiltdz;
-
- Double_t add = 0.0;
- if (TMath::Abs(dz) > padlength/2.0) {
- //Double_t dy2 = c->GetY() - fY; // Still needed ????
- //Double_t sign = (dz>0) ? -1.: 1.;
- //dy2-=h01*sign*padlength/2.;
- //dy = dy2;
- add = 1.0;
- }
-
- Double_t s00 = (c->GetSigmaY2() + errang) * extend + errsys + add; // Error pad
- Double_t s11 = c->GetSigmaZ2() * xuFactor; // Error pad-row
- //
- r00 = fCyy + 2*fCzy*h01 + fCzz*h01*h01 + s00;
- r01 = fCzy + fCzz*h01;
- r11 = fCzz + s11;
- det = r00*r11 - r01*r01;
-
- // Inverse matrix
- tmp = r00;
- r00 = r11 / det;
- r11 = tmp / det;
- r01 = -r01 / det;
-
- // K matrix
- k00 = fCyy*r00 + fCzy * (r01 + h01*r00);
- k01 = fCyy*r01 + fCzy * (r11 + h01*r01);
- k10 = fCzy*r00 + fCzz * (r01 + h01*r00);
- k11 = fCzy*r01 + fCzz * (r11 + h01*r01);
- k20 = fCey*r00 + fCez * (r01 + h01*r00);
- k21 = fCey*r01 + fCez * (r11 + h01*r01);
- k30 = fCty*r00 + fCtz * (r01 + h01*r00);
- k31 = fCty*r01 + fCtz * (r11 + h01*r01);
- k40 = fCcy*r00 + fCcz * (r01 + h01*r00);
- k41 = fCcy*r01 + fCcz * (r11 + h01*r01);
-
- // Update measurement
- cur = fC + k40*dy + k41*dz;
- eta = fE + k20*dy + k21*dz;
- if (TMath::Abs(cur*fX - eta) >= 0.9) {
- return 0;
- }
- fY += k00*dy + k01*dz;
- fZ += k10*dy + k11*dz;
- fE = eta;
- fT += k30*dy + k31*dz;
- fC = cur;
-
- k01 += h01*k00;
- k11 += h01*k10;
- k21 += h01*k20;
- k31 += h01*k30;
- k41 += h01*k40;
-
+
+ // Retrieve the CDB container class with the probability distributions
+ const AliTRDCalPID *pd = calibration->GetPIDObject(AliTRDpidUtil::kLQ);
+ if (!pd) {
+ AliError("No access to AliTRDCalPID");
+ return kFALSE;
}
- // Update the covariance matrix
- Double_t oldyy = fCyy;
- Double_t oldzz = fCzz;
- //Double_t oldee = fCee;
- //Double_t oldcc = fCcc;
- Double_t oldzy = fCzy;
- Double_t oldey = fCey;
- Double_t oldty = fCty;
- Double_t oldcy = fCcy;
- Double_t oldez = fCez;
- Double_t oldtz = fCtz;
- Double_t oldcz = fCcz;
- //Double_t oldte = fCte;
- //Double_t oldce = fCce;
- //Double_t oldct = fCct;
-
- fCyy -= k00*oldyy + k01*oldzy;
- fCzy -= k10*oldyy + k11*oldzy;
- fCey -= k20*oldyy + k21*oldzy;
- fCty -= k30*oldyy + k31*oldzy;
- fCcy -= k40*oldyy + k41*oldzy;
-
- fCzz -= k10*oldzy + k11*oldzz;
- fCez -= k20*oldzy + k21*oldzz;
- fCtz -= k30*oldzy + k31*oldzz;
- fCcz -= k40*oldzy + k41*oldzz;
-
- fCee -= k20*oldey + k21*oldez;
- fCte -= k30*oldey + k31*oldez;
- fCce -= k40*oldey + k41*oldez;
-
- fCtt -= k30*oldty + k31*oldtz;
- fCct -= k40*oldty + k41*oldtz;
-
- fCcc -= k40*oldcy + k41*oldcz;
+ // Calculate the input for the NN if fPIDmethod is kNN
+ Float_t ldEdxNN[AliTRDgeometry::kNlayer * kNMLPslice], *dedx = 0x0;
+ if(fPIDmethod == kNN) {
+ CookdEdxNN(&ldEdxNN[0]);
+ }
- Int_t n = GetNumberOfClusters();
- fIndex[n] = index;
- SetNumberOfClusters(n+1);
+ // Sets the a priori probabilities
+ for(int ispec=0; ispec<AliPID::kSPECIES; ispec++) {
+ fPID[ispec] = 1.0 / AliPID::kSPECIES;
+ }
- SetChi2(GetChi2() + chisq);
+ if(AliPID::kSPECIES != 5){
+ AliError("Probabilities array defined only for 5 values. Please modify !!");
+ return kFALSE;
+ }
- return 1;
+ pidQuality = 0;
+ Float_t length; // track segment length in chamber
-}
+ // Skip tracks which have no TRD signal at all
+ if (fdEdx == 0.) return kFALSE;
+
+ for (Int_t iPlane = 0; iPlane < AliTRDgeometry::kNlayer; iPlane++) {
-//_____________________________________________________________________________
-Int_t AliTRDtrack::UpdateMI(const AliTRDtracklet &tracklet)
-{
- //
- // Assignes found tracklet to the track and updates track information
- //
-
- Double_t r00 = (tracklet.GetTrackletSigma2());
- Double_t r01 = 0.0;
- Double_t r11 = 10000.0;
- 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;
-
- Double_t dy = tracklet.GetY() - fY;
- Double_t dz = tracklet.GetZ() - fZ;
-
- Double_t s00 = tracklet.GetTrackletSigma2(); // Error pad
- Double_t s11 = 100000.0; // Error pad-row
- Float_t h01 = tracklet.GetTilt();
-
- r00 = fCyy + fCzz*h01*h01 + s00;
- r01 = fCzy;
- r11 = fCzz + s11;
- det = r00*r11 - r01*r01;
-
- // Inverse matrix
- tmp = r00;
- r00 = r11 / det;
- r11 = tmp / det;
- r01 = -r01 / det;
-
- // K matrix
- Double_t k00 = fCyy*r00 + fCzy*r01;
- Double_t k01 = fCyy*r01 + fCzy*r11;
- Double_t k10 = fCzy*r00 + fCzz*r01;
- Double_t k11 = fCzy*r01 + fCzz*r11;
- Double_t k20 = fCey*r00 + fCez*r01;
- Double_t k21 = fCey*r01 + fCez*r11;
- Double_t k30 = fCty*r00 + fCtz*r01;
- Double_t k31 = fCty*r01 + fCtz*r11;
- Double_t k40 = fCcy*r00 + fCcz*r01;
- Double_t k41 = fCcy*r01 + fCcz*r11;
-
- // Update measurement
- Double_t cur = fC + k40*dy + k41*dz;
- Double_t eta = fE + k20*dy + k21*dz;
- if (TMath::Abs(cur*fX-eta) >= 0.9) {
- return 0;
- }
-
- fY += k00*dy + k01*dz;
- fZ += k10*dy + k11*dz;
- fE = eta;
- fT += k30*dy + k31*dz;
- fC = cur;
-
- // Update the covariance matrix
- Double_t oldyy = fCyy;
- Double_t oldzz = fCzz;
- //Double_t oldee = fCee;
- //Double_t oldcc = fCcc;
- Double_t oldzy = fCzy;
- Double_t oldey = fCey;
- Double_t oldty = fCty;
- Double_t oldcy = fCcy;
- Double_t oldez = fCez;
- Double_t oldtz = fCtz;
- Double_t oldcz = fCcz;
- //Double_t oldte = fCte;
- //Double_t oldce = fCce;
- //Double_t oldct = fCct;
-
- fCyy -= k00*oldyy + k01*oldzy;
- fCzy -= k10*oldyy + k11*oldzy;
- fCey -= k20*oldyy + k21*oldzy;
- fCty -= k30*oldyy + k31*oldzy;
- fCcy -= k40*oldyy + k41*oldzy;
-
- fCzz -= k10*oldzy + k11*oldzz;
- fCez -= k20*oldzy + k21*oldzz;
- fCtz -= k30*oldzy + k31*oldzz;
- fCcz -= k40*oldzy + k41*oldzz;
-
- fCee -= k20*oldey + k21*oldez;
- fCte -= k30*oldey + k31*oldez;
- fCce -= k40*oldey + k41*oldez;
-
- fCtt -= k30*oldty + k31*oldtz;
- fCct -= k40*oldty + k41*oldtz;
-
- fCcc -= k40*oldcy + k41*oldcz;
+ length = (AliTRDgeometry::AmThick() + AliTRDgeometry::DrThick())
+ / TMath::Sqrt((1.0 - fSnp[iPlane]*fSnp[iPlane])
+ / (1.0 + fTgl[iPlane]*fTgl[iPlane]));
- return 1;
+ // check data
+ if((fdEdxPlane[iPlane][0] + fdEdxPlane[iPlane][1] + fdEdxPlane[iPlane][2]) <= 0.
+ || fTimBinPlane[iPlane] == -1.) continue;
-}
+ // this track segment has fulfilled all requierments
+ pidQuality++;
-//_____________________________________________________________________________
-Int_t AliTRDtrack::Rotate(Double_t alpha, Bool_t absolute)
-{
- //
- // Rotates the track parameters in the R*phi plane,
- // if the absolute rotation alpha is in global system.
- // Otherwise the rotation is relative to the current rotation angle
- //
+ // Get the probabilities for the different particle species
+ for (Int_t iSpecies = 0; iSpecies < AliPID::kSPECIES; iSpecies++) {
+ switch(fPIDmethod){
+ case kLQ:
+ dedx = fdEdxPlane[iPlane];
+ break;
+ case kNN:
+ dedx = &ldEdxNN[iPlane*kNMLPslice];
+ break;
+ }
+ fPID[iSpecies] *= pd->GetProbability(iSpecies, fMom[iPlane], dedx, length, iPlane);
+ }
- if (absolute) {
- alpha -= fAlpha;
- }
- else{
- fNRotate++;
}
- fAlpha += alpha;
- if (fAlpha < -TMath::Pi()) {
- fAlpha += 2.0 * TMath::Pi();
+ if (pidQuality == 0) {
+ return kTRUE;
}
- if (fAlpha >= TMath::Pi()) {
- fAlpha -= 2.0 * TMath::Pi();
- }
-
- Double_t x1 = fX;
- Double_t y1 = fY;
- Double_t ca = TMath::Cos(alpha);
- Double_t sa = TMath::Sin(alpha);
- Double_t r1 = fC*fX - fE;
- fX = x1*ca + y1*sa;
- fY = -x1*sa + y1*ca;
- if ((r1*r1) > 1.0) {
- return 0;
+ // normalize probabilities
+ Double_t probTotal = 0.0;
+ for (Int_t iSpecies = 0; iSpecies < AliPID::kSPECIES; iSpecies++) {
+ probTotal += fPID[iSpecies];
}
- fE = fE*ca + (fC*y1 + TMath::Sqrt(1.0 - r1*r1)) * sa;
- Double_t r2 = fC*fX - fE;
- if (TMath::Abs(r2) >= 0.9) {
- Int_t n = GetNumberOfClusters();
- if (n > 4) {
- AliError(Form("Rotation failed N = %d !\n",n));
- }
- return 0;
+ if (probTotal <= 0.0) {
+ AliWarning("The total probability over all species <= 0.");
+ AliWarning("This may be caused by some error in the reference histograms.");
+ return kFALSE;
}
- if ((r2*r2) > 1.0) {
- return 0;
- }
- Double_t y0 = fY + TMath::Sqrt(1.0 - r2*r2) / fC;
- if ((fY-y0)*fC >= 0.0) {
- Int_t n = GetNumberOfClusters();
- if (n > 4) {
- AliError(Form("Rotation failed N = %d !\n",n));
- }
- return 0;
+ for (Int_t iSpecies = 0; iSpecies < AliPID::kSPECIES; iSpecies++) {
+ fPID[iSpecies] /= probTotal;
}
- // f = F - 1
- Double_t f00 = ca-1.0;
- Double_t f24 = (y1 - r1*x1/TMath::Sqrt(1.0 - r1*r1)) * sa;
- Double_t f20 = fC*sa;
- Double_t f22 = (ca + sa*r1/TMath::Sqrt(1.0 - r1*r1)) - 1.0;
-
- // b = C*ft
- Double_t b00 = fCyy*f00;
- Double_t b02 = fCyy*f20 + fCcy*f24 + fCey*f22;
- Double_t b10 = fCzy*f00;
- Double_t b12 = fCzy*f20 + fCcz*f24 + fCez*f22;
- Double_t b20 = fCey*f00;
- Double_t b22 = fCey*f20 + fCce*f24 + fCee*f22;
- Double_t b30 = fCty*f00;
- Double_t b32 = fCty*f20 + fCct*f24 + fCte*f22;
- Double_t b40 = fCcy*f00;
- Double_t b42 = fCcy*f20 + fCcc*f24 + fCce*f22;
-
- // a = f*b = f*C*ft
- Double_t a00 = f00*b00;
- Double_t a02 = f00*b02;
- Double_t a22 = f20*b02 + f24*b42 + f22*b22;
-
- // F*C*Ft = C + (a + b + bt)
- fCyy += a00 + 2.0*b00;
- fCzy += b10;
- fCey += a02 + b20 + b02;
- fCty += b30;
- fCcy += b40;
- fCez += b12;
- fCte += b32;
- fCee += a22 + 2.0*b22;
- fCce += b42;
-
- return 1;
-
-}
+ return kTRUE;
+
+}
//_____________________________________________________________________________
-Double_t AliTRDtrack::GetPredictedChi2(const AliTRDcluster *c, Double_t h01) const
+Bool_t AliTRDtrack::PropagateTo(Double_t xk, Double_t xx0, Double_t xrho)
{
//
- // Returns the track chi2
- //
+ // Propagates this track to a reference plane defined by "xk" [cm]
+ // correcting for the mean crossed material.
+ //
+ // "xx0" - thickness/rad.length [units of the radiation length]
+ // "xrho" - thickness*density [g/cm^2]
+ //
- Bool_t fNoTilt = kTRUE;
- if (TMath::Abs(h01) > 0.003) {
- fNoTilt = kFALSE;
+ if (xk == GetX()) {
+ return kTRUE;
}
- Double_t chi2;
- Double_t dy;
- Double_t r00;
- Double_t r01;
- Double_t r11;
+ Double_t oldX = GetX();
+ Double_t oldY = GetY();
+ Double_t oldZ = GetZ();
- if (fNoTilt) {
-
- dy = c->GetY() - fY;
- r00 = c->GetSigmaY2();
- chi2 = (dy*dy) / r00;
+ Double_t bz = GetBz();
+ if (!AliExternalTrackParam::PropagateTo(xk,bz)) {
+ return kFALSE;
}
- else {
-
- Double_t padlength = TMath::Sqrt(c->GetSigmaZ2() * 12.0);
-
- r00 = c->GetSigmaY2();
- r01 = 0.0;
- r11 = c->GetSigmaZ2();
- r00 += fCyy;
- r01 += fCzy;
- r11 += fCzz;
-
- Double_t det = r00*r11 - r01*r01;
- if (TMath::Abs(det) < 1.e-10) {
- Int_t n = GetNumberOfClusters();
- if (n > 4) {
- AliError(Form("Singular matrix N = %d!\n",n));
+
+ Double_t x = GetX();
+ Double_t y = GetY();
+ Double_t z = GetZ();
+
+ if (oldX < xk) {
+ xrho = -xrho;
+ if (IsStartedTimeIntegral()) {
+ Double_t l2 = TMath::Sqrt((x-oldX)*(x-oldX)
+ + (y-oldY)*(y-oldY)
+ + (z-oldZ)*(z-oldZ));
+ Double_t crv = GetC();
+ if (TMath::Abs(l2*crv) > 0.0001) {
+ // Make correction for curvature if neccesary
+ l2 = 0.5 * TMath::Sqrt((x-oldX)*(x-oldX)
+ + (y-oldY)*(y-oldY));
+ l2 = 2.0 * TMath::ASin(l2 * crv) / crv;
+ l2 = TMath::Sqrt(l2*l2 + (z-oldZ)*(z-oldZ));
}
- return 1e10;
+ AddTimeStep(l2);
}
+ }
+
+ if (!AliExternalTrackParam::CorrectForMeanMaterial(xx0,xrho,GetMass())) {
+ return kFALSE;
+ }
- Double_t tmp = r00;
- r00 = r11;
- r11 = tmp;
- r01 = -r01;
- Double_t dy = c->GetY() - fY;
- Double_t dz = c->GetZ() - fZ;
- Double_t tiltdz = dz;
- if (TMath::Abs(tiltdz) > padlength/2.0) {
- tiltdz = TMath::Sign(padlength/2.0,dz);
+ {
+
+ // Energy losses
+ Double_t p2 = (1.0 + GetTgl()*GetTgl()) / (GetSigned1Pt()*GetSigned1Pt());
+ Double_t beta2 = p2 / (p2 + GetMass()*GetMass());
+ if ((beta2 < 1.0e-10) ||
+ ((5940.0 * beta2/(1.0 - beta2 + 1.0e-10) - beta2) < 0.0)) {
+ return kFALSE;
}
- dy = dy + h01*tiltdz;
- chi2 = (dy*r00*dy + 2*r01*dy*dz + dz*r11*dz) / det;
+ Double_t dE = 0.153e-3 / beta2
+ * (TMath::Log(5940.0 * beta2/(1.0 - beta2 + 1.0e-10)) - beta2)
+ * xrho;
+ fBudget[0] += xrho;
+
+ /*
+ // 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;
+
+ /*
+ // Suspicious ! I.B.
+ 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;
+ */
}
- return chi2;
+ return kTRUE;
-}
+}
-//_________________________________________________________________________
-void AliTRDtrack::GetPxPyPz(Double_t& px, Double_t& py, Double_t& pz) const
+//_____________________________________________________________________________
+Bool_t AliTRDtrack::Update(const AliTRDcluster *c, Double_t chisq
+ , Int_t index, Double_t h01)
{
//
- // Returns reconstructed track momentum in the global system.
+ // Assignes the found cluster <c> to the track and updates
+ // track information.
+ // <chisq> : predicted chi2
+ // <index> : ??
+ // <h01> : Tilting factor
//
- Double_t pt = TMath::Abs(GetPt());
- Double_t r = fC*fX - fE;
+ Double_t p[2] = { c->GetY()
+ , c->GetZ() };
+ Double_t sy2 = c->GetSigmaY2() * 4.0;
+ Double_t sz2 = c->GetSigmaZ2() * 4.0;
+ Double_t cov[3] = { sy2 + h01*h01*sz2
+ , h01 * (sy2-sz2)
+ , sz2 + h01*h01*sy2 };
- Double_t y0;
- if (r > 1) {
- py = pt;
- px = 0.0;
- }
- else if (r < -1) {
- py = -pt;
- px = 0.0;
- }
- else {
- y0 = fY + TMath::Sqrt(1.0 - r*r) / fC;
- px = -pt * (fY - y0) * fC; //cos(phi);
- py = -pt * (fE - fX*fC); //sin(phi);
+ if (!AliExternalTrackParam::Update(p,cov)) {
+ return kFALSE;
}
- pz = pt*fT;
- Double_t tmp = px * TMath::Cos(fAlpha)
- - py * TMath::Sin(fAlpha);
- py = px * TMath::Sin(fAlpha)
- + py * TMath::Cos(fAlpha);
- px = tmp;
+ Int_t n = GetNumberOfClusters();
+ fIndex[n] = index;
+ SetNumberOfClusters(n+1);
+
+ SetChi2(GetChi2()+chisq);
+
+ return kTRUE;
-}
+}
-//_________________________________________________________________________
-void AliTRDtrack::GetGlobalXYZ(Double_t& x, Double_t& y, Double_t& z) const
+//_____________________________________________________________________________
+Int_t AliTRDtrack::UpdateMI(AliTRDcluster *c, Double_t chisq, Int_t index
+ , Double_t h01, Int_t /*plane*/, Int_t /*tid*/)
{
//
- // Returns reconstructed track coordinates in the global system.
+ // Assignes the found cluster <c> to the track and
+ // updates track information
+ // <chisq> : predicted chi2
+ // <index> : ??
+ // <h01> : Tilting factor
+ //
+ // Difference to Update(AliTRDcluster *c): cluster is added to fClusters
//
- x = fX;
- y = fY;
- z = fZ
-;
- Double_t tmp = x * TMath::Cos(fAlpha)
- - y * TMath::Sin(fAlpha);
- y = x * TMath::Sin(fAlpha)
- + y * TMath::Cos(fAlpha);
- x = tmp;
+ Double_t p[2] = { c->GetY()
+ , c->GetZ() };
+ Double_t sy2 = c->GetSigmaY2() * 4.0;
+ Double_t sz2 = c->GetSigmaZ2() * 4.0;
+ Double_t cov[3] = { sy2 + h01*h01*sz2
+ , h01 * (sy2-sz2)
+ , sz2 + h01*h01*sy2 };
-}
+ if (!AliExternalTrackParam::Update(p,cov)) {
+ return kFALSE;
+ }
+
+ AliTracker::FillResiduals(this,p,cov,c->GetVolumeId());
-//_________________________________________________________________________
-void AliTRDtrack::ResetCovariance()
+ // Register cluster to track
+ Int_t n = GetNumberOfClusters();
+ fIndex[n] = index;
+ fClusters[n] = c;
+ SetNumberOfClusters(n+1);
+ SetChi2(GetChi2() + chisq);
+
+ return kTRUE;
+
+}
+
+//_____________________________________________________________________________
+Bool_t AliTRDtrack::Update(const AliTRDtracklet &t, Double_t chisq, Int_t index)
{
//
- // Resets covariance matrix
+ // Assignes the found tracklet <t> to the track
+ // and updates track information
+ // <chisq> : predicted chi2
+ // <index> : ??
//
- fCyy *= 10.0;
- fCzy = 0.0; fCzz *= 10.0;
- fCey = 0.0; fCez = 0.0; fCee *= 10.0;
- fCty = 0.0; fCtz = 0.0; fCte = 0.0; fCtt *= 10.0;
- fCcy = 0.0; fCcz = 0.0; fCce = 0.0; fCct = 0.0; fCcc *= 10.0;
+ Double_t h01 = t.GetTilt(); // Is this correct????
+ Double_t p[2] = { t.GetY(), t.GetZ() };
+ Double_t sy2 = t.GetTrackletSigma2(); // Error pad-column
+ Double_t sz2 = 100000.0; // Error pad-row (????)
+ Double_t cov[3] = { sy2 + h01*h01*sz2 // Does this have any sense????
+ , h01 * (sy2 - sz2)
+ , sz2 + h01*h01*sy2 };
+ if (!AliExternalTrackParam::Update(p,cov)) {
+ return kFALSE;
+ }
-}
+ Int_t n = GetNumberOfClusters();
+ fIndex[n] = index;
+ SetNumberOfClusters(n+1);
+ SetChi2(GetChi2()+chisq);
+
+ return kTRUE;
+
+}
//_____________________________________________________________________________
-void AliTRDtrack::ResetCovariance(Float_t mult)
+Bool_t AliTRDtrack::Rotate(Double_t alpha, Bool_t absolute)
{
//
- // Resets covariance matrix
+ // 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
+ //
+
+ if (absolute) {
+ alpha -= GetAlpha();
+ }
+ else{
+ fNRotate++;
+ }
+
+ return AliExternalTrackParam::Rotate(GetAlpha()+alpha);
+
+}
+
+//_____________________________________________________________________________
+Double_t AliTRDtrack::GetPredictedChi2(const AliTRDcluster *c, Double_t h01) const
+{
//
+ // Returns the track chi2
+ //
- fCyy *= mult;
- fCzy *= 0.0; fCzz *= 1.0;
- fCey *= 0.0; fCez *= 0.0; fCee *= mult;
- fCty *= 0.0; fCtz *= 0.0; fCte *= 0.0; fCtt *= 1.0;
- fCcy *= 0.0; fCcz *= 0.0; fCce *= 0.0; fCct *= 0.0; fCcc *= mult;
+ Double_t p[2] = { c->GetY()
+ , c->GetZ() };
+ Double_t sy2 = c->GetSigmaY2() * 4.0;
+ Double_t sz2 = c->GetSigmaZ2() * 4.0;
+ Double_t cov[3] = { sy2 + h01*h01*sz2
+ , h01*(sy2-sz2)
+ , sz2 + h01*h01*sy2 };
-}
+ return AliExternalTrackParam::GetPredictedChi2(p,cov);
+
+}
//_____________________________________________________________________________
void AliTRDtrack::MakeBackupTrack()
if (fBackupTrack) {
delete fBackupTrack;
}
-
fBackupTrack = new AliTRDtrack(*this);
}
Int_t AliTRDtrack::GetProlongation(Double_t xk, Double_t &y, Double_t &z)
{
//
- // Find prolongation at given x
+ // Find a prolongation at given x
// Return 0 if it does not exist
- //
-
- Double_t c1 = fC*fX - fE;
- if (TMath::Abs(c1) > 1.0) {
+ //
+
+ Double_t bz = GetBz();
+
+ if (!AliExternalTrackParam::GetYAt(xk,bz,y)) {
return 0;
}
-
- Double_t r1 = TMath::Sqrt(1.0 - c1*c1);
- Double_t c2 = fC*xk - fE;
- if (TMath::Abs(c2) > 1.0) {
- return 0;
+ if (!AliExternalTrackParam::GetZAt(xk,bz,z)) {
+ return 0;
}
- Double_t r2 = TMath::Sqrt(1.0 - c2*c2);
- y = fY + (xk-fX)*(c1+c2)/(r1+r2);
- z = fZ + (xk-fX)*(c1+c2)/(c1*r2 + c2*r1)*fT;
+ return 1;
- return 1;
-
}
//_____________________________________________________________________________
Int_t AliTRDtrack::PropagateToX(Double_t xr, Double_t step)
{
//
- // Propagate track to a given x position
+ // Propagate track to given x position
// Works inside of the 20 degree segmentation
// (local cooordinate frame for TRD , TPC, TOF)
//
- // The material budget is taken from the geo manager
- //
-
- Double_t xyz0[3];
- Double_t xyz1[3];
- Double_t y;
- Double_t z;
+ // Material budget from geo manager
+ //
+
+ Double_t xyz0[3];
+ Double_t xyz1[3];
+ Double_t y;
+ Double_t z;
- // Critical alpha - cross sector indication
const Double_t kAlphac = TMath::Pi()/9.0;
const Double_t kTalphac = TMath::Tan(kAlphac*0.5);
+ // Critical alpha - cross sector indication
+ Double_t dir = (GetX() > xr) ? -1.0 : 1.0;
+
// Direction +-
- Double_t dir = (fX > xr) ? -1.0 : 1.0;
+ for (Double_t x = GetX()+dir*step; dir*x < dir*xr; x += dir*step) {
- for (Double_t x = fX + dir*step; dir*x < dir*xr; x += dir*step) {
-
- GetGlobalXYZ(xyz0[0],xyz0[1],xyz0[2]);
+ GetXYZ(xyz0);
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[0] = x * TMath::Cos(GetAlpha()) + y * TMath::Sin(GetAlpha());
+ xyz1[1] = x * TMath::Sin(GetAlpha()) - y * TMath::Cos(GetAlpha());
xyz1[2] = z;
Double_t param[7];
- AliKalmanTrack::MeanMaterialBudget(xyz0,xyz1,param);
-
- if ((param[0] > 0) &&
+ AliTracker::MeanMaterialBudget(xyz0,xyz1,param);
+
+ if ((param[0] > 0) &&
(param[1] > 0)) {
- PropagateTo(x,param[1],param[0]);
+ PropagateTo(x,param[1],param[0]*param[4]);
}
- if (fY > fX*kTalphac) {
+
+ if (GetY() > GetX()*kTalphac) {
Rotate(-kAlphac);
}
- if (fY < -fX*kTalphac) {
- Rotate(kAlphac);
+ if (GetY() < -GetX()*kTalphac) {
+ Rotate( kAlphac);
}
}
}
//_____________________________________________________________________________
-Int_t AliTRDtrack::PropagateToR(Double_t r,Double_t step)
+Int_t AliTRDtrack::PropagateToR(Double_t r,Double_t step)
{
//
- // Propagate a track to a given radial position
- // The rotation is always connected to the last track position
+ // Propagate track to the radial position
+ // Rotation always connected to the last track position
//
Double_t xyz0[3];
Double_t y;
Double_t z;
+ Double_t radius = TMath::Sqrt(GetX()*GetX() + GetY()*GetY());
// Direction +-
- Double_t radius = TMath::Sqrt(fX*fX + fY*fY);
Double_t dir = (radius > r) ? -1.0 : 1.0;
-
- for (Double_t x = radius + dir*step; dir*x < dir*r; x += dir*step) {
- GetGlobalXYZ(xyz0[0],xyz0[1],xyz0[2]);
+
+ for (Double_t x = radius+dir*step; dir*x < dir*r; x += dir*step) {
+
+ GetXYZ(xyz0);
Double_t alpha = TMath::ATan2(xyz0[1],xyz0[0]);
Rotate(alpha,kTRUE);
- GetGlobalXYZ(xyz0[0],xyz0[1],xyz0[2]);
+ GetXYZ(xyz0);
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] <= 0.0) {
- param[1] = 100000000.0;
+ AliTracker::MeanMaterialBudget(xyz0,xyz1,param);
+ if (param[1] <= 0) {
+ param[1] = 100000000;
}
- PropagateTo(x,param[1],param[0]);
+ PropagateTo(x,param[1],param[0]*param[4]);
+
}
- GetGlobalXYZ(xyz0[0],xyz0[1],xyz0[2]);
+ GetXYZ(xyz0);
Double_t alpha = TMath::ATan2(xyz0[1],xyz0[0]);
Rotate(alpha,kTRUE);
- GetGlobalXYZ(xyz0[0],xyz0[1],xyz0[2]);
+ GetXYZ(xyz0);
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] <= 0.0) {
- param[1] = 100000000.0;
+ AliTracker::MeanMaterialBudget(xyz0,xyz1,param);
+
+ if (param[1] <= 0) {
+ param[1] = 100000000;
}
- PropagateTo(r,param[1],param[0]);
+ PropagateTo(r,param[1],param[0]*param[4]);
return 0;
// Return the current sector
//
- return Int_t(TVector2::Phi_0_2pi(fAlpha)
- / AliTRDgeometry::GetAlpha())
- % AliTRDgeometry::kNsect;
-
-}
-
-//_____________________________________________________________________________
-Double_t AliTRDtrack::Get1Pt() const
-{
- //
- // Returns the inverse Pt (1/GeV/c)
- // (or 1/"most probable pt", if the field is too weak)
- //
-
- if (TMath::Abs(GetLocalConvConst()) > kVeryBigConvConst) {
- return 1.0 / kMostProbableMomentum
- / TMath::Sqrt(1.0 + GetTgl()*GetTgl());
- }
-
- return (TMath::Sign(1.0e-9,fC) + fC) * GetLocalConvConst();
-
-}
-
-//_____________________________________________________________________________
-Double_t AliTRDtrack::GetP() const
-{
- //
- // Returns the total momentum
- //
-
- return TMath::Abs(GetPt()) * TMath::Sqrt(1.0 + GetTgl()*GetTgl());
-
-}
-
-//_____________________________________________________________________________
-Double_t AliTRDtrack::GetYat(Double_t xk) const
-{
- //
- // This function calculates the Y-coordinate of a track at
- // the plane x = xk.
- // Needed for matching with the TOF (I.Belikov)
- //
-
- Double_t c1 = fC*fX - fE;
- Double_t r1 = TMath::Sqrt(1.0 - c1*c1);
- Double_t c2 = fC*xk - fE;
- Double_t r2 = TMath::Sqrt(1.0- c2*c2);
-
- return fY + (xk-fX)*(c1+c2)/(r1+r2);
+ return Int_t(TVector2::Phi_0_2pi(GetAlpha()) / AliTRDgeometry::GetAlpha())
+ % AliTRDgeometry::kNsector;
}
Double_t s = GetSnp();
Double_t t = GetTgl();
-
q *= TMath::Sqrt((1.0 - s*s) / (1.0 + t*t));
fdQdl[i] = q;
}
- //_____________________________________________________________________________
+//_____________________________________________________________________________
void AliTRDtrack::SetSampledEdx(Float_t q)
{
//
Double_t s = GetSnp();
Double_t t = GetTgl();
-
- q*= TMath::Sqrt((1.0 - s*s) / (1.0 + t*t));
+ q *= TMath::Sqrt((1.0 - s*s) / (1.0 + t*t));
fdQdl[fNdedx] = q;
fNdedx++;
}
//_____________________________________________________________________________
-void AliTRDtrack::GetXYZ(Float_t r[3]) const
+Double_t AliTRDtrack::GetBz() const
{
//
- // Returns the position of the track in the global coord. system
+ // Returns Bz component of the magnetic field (kG)
//
- Double_t cs = TMath::Cos(fAlpha);
- Double_t sn = TMath::Sin(fAlpha);
- r[0] = fX*cs - fY*sn;
- r[1] = fX*sn + fY*cs;
- r[2] = fZ;
+ if (AliTracker::UniformField()) {
+ return AliTracker::GetBz();
+ }
+ Double_t r[3];
+ GetXYZ(r);
+
+ return AliTracker::GetBz(r);
}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff