* provided "as is" without express or implied warranty. *
**************************************************************************/
-/*
-$Log$
-Revision 1.15 2002/11/25 09:33:30 hristov
-Tracking of secondaries (M.Ivanov)
-
-Revision 1.14 2002/10/23 13:45:00 hristov
-Fatal if no magnetic field set for the reconstruction (Y.Belikov)
-
-Revision 1.13 2002/10/23 07:17:34 alibrary
-Introducing Riostream.h
-
-Revision 1.12 2002/10/14 14:57:43 hristov
-Merging the VirtualMC branch to the main development branch (HEAD)
-
-Revision 1.9.6.1 2002/10/11 08:34:48 hristov
-Updating VirtualMC to v3-09-02
-
-Revision 1.11 2002/07/19 07:34:42 kowal2
-Logs added
-
-*/
-
+/* $Id$ */
//-----------------------------------------------------------------
// Implementation of the TPC track class
-//
-// Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
+// This class is used by the AliTPCtracker class
+// Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
//-----------------------------------------------------------------
#include <Riostream.h>
#include "AliTPCtrack.h"
-#include "AliTPCcluster.h"
-#include "AliTPCClustersRow.h"
-#include "AliTPCClustersArray.h"
+#include "AliCluster.h"
+#include "AliESDtrack.h"
+#include "AliTPCReconstructor.h"
ClassImp(AliTPCtrack)
//_________________________________________________________________________
+AliTPCtrack::AliTPCtrack():
+ AliKalmanTrack(),
+ fX(0),
+ fAlpha(0),
+ fdEdx(0),
+ fP0(0),
+ fP1(0),
+ fP2(0),
+ fP3(0),
+ fP4(0),
+ fC00(1e10),
+ fC10(0),
+ fC11(1e10),
+ fC20(0),
+ fC21(0),
+ fC22(1e10),
+ fC30(0),
+ fC31(0),
+ fC32(0),
+ fC33(1e10),
+ fC40(0),
+ fC41(0),
+ fC42(0),
+ fC43(0),
+ fC44(0),
+ fNumber(0),
+ fSdEdx(1e10),
+ fNFoundable(0),
+ fBConstrain(kFALSE),
+ fLastPoint(-1),
+ fFirstPoint(-1),
+ fRemoval(0),
+ fTrackType(0),
+ fLab2(-1),
+ fNShared(0),
+ fReference()
+{
+ //-------------------------------------------------
+ // default constructor
+ //-------------------------------------------------
+ for (Int_t i=0; i<kMaxRow;i++) fIndex[i]=-2;
+ for (Int_t i=0; i<4;i++) fPoints[i]=0.;
+ for (Int_t i=0; i<12;i++) fKinkPoint[i]=0.;
+ for (Int_t i=0; i<3;i++) fKinkIndexes[i]=0;
+ for (Int_t i=0; i<3;i++) fV0Indexes[i]=0;
+}
+
+//_________________________________________________________________________
+
+
+
AliTPCtrack::AliTPCtrack(UInt_t index, const Double_t xx[5],
-const Double_t cc[15], Double_t xref, Double_t alpha) : AliKalmanTrack() {
+const Double_t cc[15], Double_t xref, Double_t alpha) :
+ AliKalmanTrack(),
+ fX(xref),
+ fdEdx(0),
+ fP0(xx[0]),
+ fP1(xx[1]),
+ fP2(xx[2]),
+ fP3(xx[3]),
+ fP4(xx[4]),
+ fC00(cc[0]),
+ fC10(cc[1]),
+ fC11(cc[2]),
+ fC20(cc[3]),
+ fC21(cc[4]),
+ fC22(cc[5]),
+ fC30(cc[6]),
+ fC31(cc[7]),
+ fC32(cc[8]),
+ fC33(cc[9]),
+ fC40(cc[10]),
+ fC41(cc[11]),
+ fC42(cc[12]),
+ fC43(cc[13]),
+ fC44(cc[14]),
+ fNumber(1),
+ fSdEdx(1e10),
+ fNFoundable(0),
+ fBConstrain(kFALSE),
+ fLastPoint(0),
+ fFirstPoint(0),
+ fRemoval(0),
+ fTrackType(0),
+ fLab2(0),
+ fNShared(0),
+ fReference()
+{
//-----------------------------------------------------------------
// This is the main track constructor.
//-----------------------------------------------------------------
- fX=xref;
fAlpha=alpha;
if (fAlpha<-TMath::Pi()) fAlpha += 2*TMath::Pi();
if (fAlpha>=TMath::Pi()) fAlpha -= 2*TMath::Pi();
- fdEdx=0.;
-
- fP0=xx[0]; fP1=xx[1]; fP2=xx[2]; fP3=xx[3]; fP4=xx[4];
- fC00=cc[0];
- fC10=cc[1]; fC11=cc[2];
- fC20=cc[3]; fC21=cc[4]; fC22=cc[5];
- fC30=cc[6]; fC31=cc[7]; fC32=cc[8]; fC33=cc[9];
- fC40=cc[10]; fC41=cc[11]; fC42=cc[12]; fC43=cc[13]; fC44=cc[14];
+ SaveLocalConvConst();
- fIndex[0]=index;
SetNumberOfClusters(1);
-
+
+ fIndex[0]=index;
+ for (Int_t i=1; i<kMaxRow;i++) fIndex[i]=-2;
+ for (Int_t i=0; i<4;i++) fPoints[i]=0.;
+ for (Int_t i=0; i<12;i++) fKinkPoint[i]=0.;
+ for (Int_t i=0; i<3;i++) fKinkIndexes[i]=0;
+ for (Int_t i=0; i<3;i++) fV0Indexes[i]=0;
}
//_____________________________________________________________________________
-AliTPCtrack::AliTPCtrack(const AliKalmanTrack& t,Double_t alpha) :
-AliKalmanTrack(t) {
+AliTPCtrack::AliTPCtrack(const AliESDtrack& t) :
+ AliKalmanTrack(),
+ fSdEdx(1e10),
+ fNFoundable(0),
+ fBConstrain(kFALSE),
+ fLastPoint(0),
+ fFirstPoint(0),
+ fRemoval(0),
+ fTrackType(0),
+ fLab2(0),
+ fNShared(0),
+ fReference()
+{
//-----------------------------------------------------------------
- // Conversion AliKalmanTrack -> AliTPCtrack.
+ // Conversion AliESDtrack -> AliTPCtrack.
//-----------------------------------------------------------------
- SetChi2(0.);
- SetNumberOfClusters(0);
-
- fdEdx = 0.;
- fAlpha = alpha;
+ SetNumberOfClusters(t.GetTPCclusters(fIndex));
+ SetLabel(t.GetLabel());
+ SetMass(t.GetMass());
+ for (Int_t i=0; i<4;i++) fPoints[i]=0.;
+ for (Int_t i=0; i<12;i++) fKinkPoint[i]=0.;
+ for (Int_t i=0; i<3;i++) fKinkIndexes[i]=0;
+ for (Int_t i=0; i<3;i++) fV0Indexes[i]=0;
+
+ fdEdx = t.GetTPCsignal();
+ fAlpha = t.GetAlpha();
if (fAlpha < -TMath::Pi()) fAlpha += 2*TMath::Pi();
else if (fAlpha >= TMath::Pi()) fAlpha -= 2*TMath::Pi();
//Conversion of the track parameters
Double_t x,p[5]; t.GetExternalParameters(x,p);
- fX=x; x=GetConvConst();
- fP0=p[0];
- fP1=p[1];
- fP3=p[3];
- fP4=p[4]/x;
+ Double_t c[15]; t.GetExternalCovariance(c);
+
+ fX=x;
+ fP0=p[0];
+ fP1=p[1]; SaveLocalConvConst();
+ fP3=p[3]; x=GetLocalConvConst();
+ fP4=p[4]/x;
fP2=fP4*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*fX*c[12] + c[5];
Double_t c32=fX*c[13] - c[8];
Double_t c20=fX*c[10] - c[3], c21=fX*c[11] - c[4], c42=fX*c[14] - c[12];
-
+
fC00=c[0 ];
fC10=c[1 ]; fC11=c[2 ];
fC20=c20; fC21=c21; fC22=c22;
fC30=c[6 ]; fC31=c[7 ]; fC32=c32; fC33=c[9 ];
fC40=c[10]; fC41=c[11]; fC42=c42; fC43=c[13]; fC44=c[14];
+ if ((t.GetStatus()&AliESDtrack::kTIME) == 0) return;
+ StartTimeIntegral();
+ Double_t times[10]; t.GetIntegratedTimes(times); SetIntegratedTimes(times);
+ SetIntegratedLength(t.GetIntegratedLength());
}
//_____________________________________________________________________________
-AliTPCtrack::AliTPCtrack(const AliTPCtrack& t) : AliKalmanTrack(t) {
+AliTPCtrack::AliTPCtrack(const AliTPCtrack& t) :
+ AliKalmanTrack(t),
+ fX(t.fX),
+ fAlpha(t.fAlpha),
+ fdEdx(t.fdEdx),
+ fP0(t.fP0),
+ fP1(t.fP1),
+ fP2(t.fP2),
+ fP3(t.fP3),
+ fP4(t.fP4),
+ fC00(t.fC00),
+ fC10(t.fC10),
+ fC11(t.fC11),
+ fC20(t.fC20),
+ fC21(t.fC21),
+ fC22(t.fC22),
+ fC30(t.fC30),
+ fC31(t.fC31),
+ fC32(t.fC32),
+ fC33(t.fC33),
+ fC40(t.fC40),
+ fC41(t.fC41),
+ fC42(t.fC42),
+ fC43(t.fC43),
+ fC44(t.fC44),
+ fNumber(t.fNumber),
+ fSdEdx(t.fSdEdx),
+ fNFoundable(t.fNFoundable),
+ fBConstrain(t.fBConstrain),
+ fLastPoint(t.fLastPoint),
+ fFirstPoint(t.fFirstPoint),
+ fRemoval(t.fRemoval),
+ fTrackType(t.fTrackType),
+ fLab2(t.fLab2),
+ fNShared(t.fNShared),
+ fReference(t.fReference)
+
+{
//-----------------------------------------------------------------
// This is a track copy constructor.
//-----------------------------------------------------------------
- fX=t.fX;
- fAlpha=t.fAlpha;
- fdEdx=t.fdEdx;
-
- fP0=t.fP0; fP1=t.fP1; fP2=t.fP2; fP3=t.fP3; fP4=t.fP4;
-
- fC00=t.fC00;
- fC10=t.fC10; fC11=t.fC11;
- fC20=t.fC20; fC21=t.fC21; fC22=t.fC22;
- fC30=t.fC30; fC31=t.fC31; fC32=t.fC32; fC33=t.fC33;
- fC40=t.fC40; fC41=t.fC41; fC42=t.fC42; fC43=t.fC43; fC44=t.fC44;
-
- Int_t n=GetNumberOfClusters();
- for (Int_t i=0; i<n; i++) fIndex[i]=t.fIndex[i];
+ for (Int_t i=0; i<kMaxRow; i++) fIndex[i]=t.fIndex[i];
+ for (Int_t i=0; i<4;i++) fPoints[i]=t.fPoints[i];
+ for (Int_t i=0; i<12;i++) fKinkPoint[i]=t.fKinkPoint[i];
+ for (Int_t i=0; i<3;i++) fKinkIndexes[i]=t.fKinkIndexes[i];
+ for (Int_t i=0; i<3;i++) fV0Indexes[i]=t.fV0Indexes[i];
}
//_____________________________________________________________________________
//_____________________________________________________________________________
void AliTPCtrack::GetExternalCovariance(Double_t cc[15]) const {
- //-------------------------------------------------------------------------
+ //-------------------------------------------------------------------------
// This function returns an external representation of the covriance matrix.
// (See comments in AliTPCtrack.h about external track representation)
//-------------------------------------------------------------------------
- Double_t a=GetConvConst();
+ Double_t a=GetLocalConvConst();
Double_t c22=fX*fX*fC44-2*fX*fC42+fC22;
Double_t c32=fX*fC43-fC32;
return (dy*r00*dy + 2*r01*dy*dz + dz*r11*dz)/det;
}
+Double_t AliTPCtrack::GetYat(Double_t xk) const {
+//-----------------------------------------------------------------
+// This function calculates the Y-coordinate of a track at the plane x=xk.
+//-----------------------------------------------------------------
+ if (TMath::Abs(fP4*fX - fP2)>AliTPCReconstructor::GetMaxSnpTrack()) return 0.; //patch 01 jan 06
+ Double_t c1=fP4*fX - fP2, r1=TMath::Sqrt(1.- c1*c1);
+ Double_t c2=fP4*xk - fP2;
+ if (c2*c2>AliTPCReconstructor::GetMaxSnpTrack()) {
+ // Int_t n=GetNumberOfClusters();
+ // if (n>4) cerr<<n<<"AliTPCtrack::GetYat: can't evaluate the y-coord !\n";
+ return 0;
+ }
+ Double_t r2=TMath::Sqrt(1.- c2*c2);
+ return fP0 + (xk-fX)*(c1+c2)/(r1+r2);
+}
+
//_____________________________________________________________________________
-Int_t AliTPCtrack::PropagateTo(Double_t xk,Double_t x0,Double_t rho) {
+Int_t AliTPCtrack::PropagateTo(Double_t xk,Double_t /*x0*/,Double_t rho) {
//-----------------------------------------------------------------
// This function propagates a track to a reference plane x=xk.
//-----------------------------------------------------------------
- if (TMath::Abs(fP4*xk - fP2) >= 0.9) {
+ if (TMath::Abs(fP4*xk - fP2) >= AliTPCReconstructor::GetMaxSnpTrack()) {
// Int_t n=GetNumberOfClusters();
//if (n>4) cerr<<n<<" AliTPCtrack warning: Propagation failed !\n";
return 0;
}
+ Double_t lcc=GetLocalConvConst();
+
+ // old position for time [SR, GSI 17.02.2003]
+ Double_t oldX = fX;
+ Double_t oldY = fP0;
+ Double_t oldZ = fP1;
+ //
Double_t x1=fX, x2=x1+(xk-x1), dx=x2-x1, y1=fP0, z1=fP1;
Double_t c1=fP4*x1 - fP2, r1=sqrt(1.- c1*c1);
fX=x2;
- //Multiple scattering******************
+ //Change of the magnetic field *************
+ SaveLocalConvConst();
+ cc=fP4;
+ fP4*=lcc/GetLocalConvConst();
+ fP2+=fX*(fP4-cc);
+
+ //Multiple scattering ******************
Double_t d=sqrt((x1-fX)*(x1-fX)+(y1-fP0)*(y1-fP0)+(z1-fP1)*(z1-fP1));
Double_t p2=(1.+ GetTgl()*GetTgl())/(Get1Pt()*Get1Pt());
Double_t beta2=p2/(p2 + GetMass()*GetMass());
+ beta2 = TMath::Min(beta2,0.99999999999);
//Double_t theta2=14.1*14.1/(beta2*p2*1e6)*d/x0*rho;
Double_t theta2=1.0259e-6*10*10/20/(beta2*p2)*d*rho;
Double_t ey=fP4*fX - fP2, ez=fP3;
Double_t xz=fP4*ez, zz1=ez*ez+1, xy=fP2+ey;
-
+
fC22 += (2*ey*ez*ez*fP2+1-ey*ey+ez*ez+fP2*fP2*ez*ez)*theta2;
fC32 += ez*zz1*xy*theta2;
fC33 += zz1*zz1*theta2;
fC42 += xz*ez*xy*theta2;
fC43 += xz*zz1*theta2;
fC44 += xz*xz*theta2;
-
- //Energy losses************************
+ /*
+ //
+ //MI coeficients
+ Double_t dc22 = (1-ey*ey+xz*xz*fX*fX)*theta2;
+ Double_t dc32 = (xz*fX*zz1)*theta2;
+ Double_t dc33 = (zz1*zz1)*theta2;
+ Double_t dc42 = (xz*fX*xz)*theta2;
+ Double_t dc43 = (zz1*xz)*theta2;
+ Double_t dc44 = (xz*xz)*theta2;
+ fC22 += dc22;
+ fC32 += dc32;
+ fC33 += dc33;
+ fC42 += dc42;
+ fC43 += dc43;
+ fC44 += dc44;
+ */
+ //Energy losses ************************
Double_t dE=0.153e-3/beta2*(log(5940*beta2/(1-beta2)) - beta2)*d*rho;
if (x1 < x2) dE=-dE;
cc=fP4;
+
+ //Double_t E = sqrt(p2+GetMass()*GetMass());
+ //Double_t mifac = TMath::Sqrt(1.+dE*dE/p2+2*E*dE/p2)-1;
+ //Double_t belfac = E*dE/p2;
+ //
fP4*=(1.- sqrt(p2+GetMass()*GetMass())/p2*dE);
fP2+=fX*(fP4-cc);
+ // Integrated Time [SR, GSI, 17.02.2003]
+ if (x1 < x2)
+ if (IsStartedTimeIntegral()) {
+ Double_t l2 = (fX-oldX)*(fX-oldX)+(fP0-oldY)*(fP0-oldY)+(fP1-oldZ)*(fP1-oldZ);
+ AddTimeStep(TMath::Sqrt(l2));
+ }
+ //
+
return 1;
}
Double_t dy=c->GetY() - fP0, dz=c->GetZ() - fP1;
Double_t cur=fP4 + k40*dy + k41*dz, eta=fP2 + k20*dy + k21*dz;
- if (TMath::Abs(cur*fX-eta) >= 0.9) {
+ if (TMath::Abs(cur*fX-eta) >= AliTPCReconstructor::GetMaxSnpTrack()) {
// Int_t n=GetNumberOfClusters();
//if (n>4) cerr<<n<<" AliTPCtrack warning: Filtering failed !\n";
return 0;
Double_t ca=cos(alpha), sa=sin(alpha);
Double_t r1=fP4*fX - fP2;
+ if (TMath::Abs(r1)>=AliTPCReconstructor::GetMaxSnpTrack()) return 0; //patch 01 jan 06
+
fX = x1*ca + y1*sa;
fP0=-x1*sa + y1*ca;
fP2=fP2*ca + (fP4*y1 + sqrt(1.- r1*r1))*sa;
Double_t r2=fP4*fX - fP2;
- if (TMath::Abs(r2) >= 0.99999) {
- Int_t n=GetNumberOfClusters();
- if (n>4) cerr<<n<<" AliTPCtrack warning: Rotation failed !\n";
+ if (TMath::Abs(r2) >= AliTPCReconstructor::GetMaxSnpTrack()) {
+ //Int_t n=GetNumberOfClusters();
+ // if (n>4) cerr<<n<<" AliTPCtrack warning: Rotation failed !\n";
return 0;
}
Double_t y0=fP0 + sqrt(1.- r2*r2)/fP4;
if ((fP0-y0)*fP4 >= 0.) {
- Int_t n=GetNumberOfClusters();
- if (n>4) cerr<<n<<" AliTPCtrack warning: Rotation failed !!!\n";
+ //Int_t n=GetNumberOfClusters();
+ // if (n>4) cerr<<n<<" AliTPCtrack warning: Rotation failed !!!\n";
return 0;
}
////////////////////////////////////////////////////////////////////////
Double_t AliTPCtrack::Phi() const {
-
+//
+//
+//
Double_t phi = TMath::ASin(GetSnp()) + fAlpha;
if (phi<0) phi+=2*TMath::Pi();
if (phi>=2*TMath::Pi()) phi-=2*TMath::Pi();
////////////////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////////////////
+// MI ADDITION
+
+Float_t AliTPCtrack::Density(Int_t row0, Int_t row1)
+{
+ //
+ // calculate cluster density
+ Int_t good = 0;
+ Int_t found = 0;
+ //if (row0<fFirstPoint) row0 = fFirstPoint;
+ if (row1>fLastPoint) row1 = fLastPoint;
+
+
+ for (Int_t i=row0;i<=row1;i++){
+ // Int_t index = fClusterIndex[i];
+ Int_t index = fIndex[i];
+ if (index!=-1) good++;
+ if (index>0) found++;
+ }
+ Float_t density=0;
+ if (good>0) density = Float_t(found)/Float_t(good);
+ return density;
+}
+
+
+Float_t AliTPCtrack::Density2(Int_t row0, Int_t row1)
+{
+ //
+ // calculate cluster density
+ Int_t good = 0;
+ Int_t found = 0;
+ //
+ for (Int_t i=row0;i<=row1;i++){
+ Int_t index = fIndex[i];
+ if (index!=-1) good++;
+ if (index>0) found++;
+ }
+ Float_t density=0;
+ if (good>0) density = Float_t(found)/Float_t(good);
+ return density;
+}
+
+
+Double_t AliTPCtrack::GetZat0() const
+{
+ //
+ // return virtual z - supposing that x = 0
+ if (TMath::Abs(fP2)>1) return 0;
+ if (TMath::Abs(fX*fP4-fP2)>1) return 0;
+ Double_t vz = fP1+fP3/fP4*(asin(-fP2)-asin(fX*fP4-fP2));
+ return vz;
+}
+
+
+Double_t AliTPCtrack::GetD(Double_t x, Double_t y) const {
+ //------------------------------------------------------------------
+ // This function calculates the transverse impact parameter
+ // with respect to a point with global coordinates (x,y)
+ //------------------------------------------------------------------
+ //Double_t xt=fX, yt=fP0;
+
+ Double_t sn=TMath::Sin(fAlpha), cs=TMath::Cos(fAlpha);
+ Double_t a = x*cs + y*sn;
+ y = -x*sn + y*cs; x=a;
+ //
+ Double_t r = TMath::Abs(1/fP4);
+ Double_t x0 = TMath::Abs(fP2*r);
+ Double_t y0 = fP0;
+ y0= fP0+TMath::Sqrt(1-(fP4*fX-fP2)*(fP4*fX-fP2))/fP4;
+
+ Double_t delta = TMath::Sqrt((x-x0)*(x-x0)+(y-y0)*(y-y0));
+ // Double_t delta = TMath::Sqrt(TMath::Abs(x*x-2*x0*x+x0*x0+ y*y-2*y*y0+y0*y0));
+ delta -= TMath::Abs(r);
+ return delta;
+}
+
+//
+//
+
+void AliTPCtrack::UpdatePoints()
+{
+ //--------------------------------------------------
+ //calculates first ,amx dens and last points
+ //--------------------------------------------------
+ Float_t density[160];
+ for (Int_t i=0;i<160;i++) density[i]=-1.;
+ fPoints[0]= 160;
+ fPoints[1] = -1;
+ //
+ Int_t ngood=0;
+ Int_t undeff=0;
+ Int_t nall =0;
+ Int_t range=20;
+ for (Int_t i=0;i<160;i++){
+ Int_t last = i-range;
+ if (nall<range) nall++;
+ if (last>=0){
+ if (fIndex[last]>0&& (fIndex[last]&0x8000)==0) ngood--;
+ if (fIndex[last]==-1) undeff--;
+ }
+ if (fIndex[i]>0&& (fIndex[i]&0x8000)==0) ngood++;
+ if (fIndex[i]==-1) undeff++;
+ if (nall==range &&undeff<range/2) density[i-range/2] = Float_t(ngood)/Float_t(nall-undeff);
+ }
+ Float_t maxdens=0;
+ Int_t indexmax =0;
+ for (Int_t i=0;i<160;i++){
+ if (density[i]<0) continue;
+ if (density[i]>maxdens){
+ maxdens=density[i];
+ indexmax=i;
+ }
+ }
+ //
+ //max dens point
+ fPoints[3] = maxdens;
+ fPoints[1] = indexmax;
+ //
+ // last point
+ for (Int_t i=indexmax;i<160;i++){
+ if (density[i]<0) continue;
+ if (density[i]<maxdens/2.) {
+ break;
+ }
+ fPoints[2]=i;
+ }
+ //
+ // first point
+ for (Int_t i=indexmax;i>0;i--){
+ if (density[i]<0) continue;
+ if (density[i]<maxdens/2.) {
+ break;
+ }
+ fPoints[0]=i;
+ }
+ //
+}
+
+Double_t AliTPCtrack::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./kMostProbableMomentum/TMath::Sqrt(1.+ GetTgl()*GetTgl());
+ return (TMath::Sign(1e-9,fP4) + fP4)*GetLocalConvConst();
+}