const Double_t kVeryBig=1./kAlmost0;
const Double_t kMostProbablePt=0.35;
-Double_t ApproximateBetheBloch(Double_t);
-
class AliVVertex;
class TPolyMarker3D;
+const Double_t kC0max=100*100, // SigmaY<=100cm
+ kC2max=100*100, // SigmaZ<=100cm
+ kC5max=1*1, // SigmaSin<=1
+ kC9max=1*1, // SigmaTan<=1
+ kC14max=100*100; // Sigma1/Pt<=100 1/GeV
+
class AliExternalTrackParam: public AliVTrack {
public:
AliExternalTrackParam();
Double_t cv[21],Short_t sign);
virtual ~AliExternalTrackParam(){}
- void Set(Double_t x,Double_t alpha,
- const Double_t param[5], const Double_t covar[15]);
+ template <typename T>
+ void Set(T x, T alpha, const T param[5], const T covar[15]) {
+ // Sets the parameters
+ fX=x; fAlpha=alpha;
+ for (Int_t i = 0; i < 5; i++) fP[i] = param[i];
+ for (Int_t i = 0; i < 15; i++) fC[i] = covar[i];
+
+ CheckCovariance();
+
+ }
+
void Set(Double_t xyz[3],Double_t pxpypz[3],Double_t cv[21],Short_t sign);
static void SetMostProbablePt(Double_t pt) { fgMostProbablePt=pt; }
// additional functions for AliVParticle
Double_t Px() const;
Double_t Py() const;
- Double_t Pz() const;
+ Double_t Pz() const { return Pt()*GetTgl(); }
Double_t Pt() const { return TMath::Abs(GetSignedPt()); }
Double_t P() const { return GetP(); }
Bool_t PxPyPz(Double_t p[3]) const { return GetPxPyPz(p); }
Double_t Xv() const;
Double_t Yv() const;
- Double_t Zv() const;
+ Double_t Zv() const {return GetZ();}
Bool_t XvYvZv(Double_t x[3]) const { return GetXYZ(x); }
Double_t OneOverPt() const { return 1./Pt(); }
virtual Double_t M() const;
Double_t Eta() const;
virtual Double_t Y() const;
- Short_t Charge() const { return (Short_t)GetSign(); }
+ virtual Short_t Charge() const { return (Short_t)GetSign(); }
virtual const Double_t *PID() const { return 0x0; }
// additional functions from AliVTrack
return (TMath::Abs(fP[4])>kAlmost0) ? 1./fP[4]:TMath::Sign(kVeryBig,fP[4]);
}
Double_t Get1P() const;
- Double_t GetC(Double_t b) const {return fP[4]*b*kB2C;}
+ virtual Double_t GetC(Double_t b) const {return fP[4]*b*kB2C;}
void GetDZ(Double_t x,Double_t y,Double_t z,Double_t b,Float_t dz[2]) const;
Double_t GetD(Double_t xv, Double_t yv, Double_t b) const;
Double_t GetLinearD(Double_t xv, Double_t yv) const;
+
Bool_t CorrectForMeanMaterial(Double_t xOverX0, Double_t xTimesRho,
Double_t mass, Bool_t anglecorr=kFALSE,
- Double_t (*f)(Double_t)=ApproximateBetheBloch);
+ Double_t (*f)(Double_t)=AliExternalTrackParam::BetheBlochSolid);
+
+ Bool_t CorrectForMeanMaterialdEdx(Double_t xOverX0, Double_t xTimesRho,
+ Double_t mass, Double_t dEdx, Bool_t anglecorr=kFALSE);
+
+ Bool_t CorrectForMeanMaterialZA(Double_t xOverX0, Double_t xTimesRho,
+ Double_t mass,
+ Double_t zOverA=0.49848,
+ Double_t density=2.33,
+ Double_t exEnergy=173e-9,
+ Double_t jp1=0.20,
+ Double_t jp2=3.00,
+ Bool_t anglecorr=kFALSE
+ );
+
+ //
+ // Bethe-Bloch formula parameterizations
+ //
+ static Double_t BetheBlochAleph(Double_t bg,
+ Double_t kp1=0.76176e-1,
+ Double_t kp2=10.632,
+ Double_t kp3=0.13279e-4,
+ Double_t kp4=1.8631,
+ Double_t kp5=1.9479
+ );
+ static Double_t BetheBlochGeant(Double_t bg,
+ Double_t kp0=2.33,
+ Double_t kp1=0.20,
+ Double_t kp2=3.00,
+ Double_t kp3=173e-9,
+ Double_t kp4=0.49848
+ );
+
+ static Double_t BetheBlochSolid(Double_t bg);
+ static Double_t BetheBlochGas(Double_t bg);
+
Double_t GetPredictedChi2(Double_t p[2],Double_t cov[3]) const;
Double_t
GetPredictedChi2(Double_t p[3],Double_t covyz[3],Double_t covxyz[3]) const;
+
+ Double_t GetPredictedChi2(const AliExternalTrackParam *t) const;
+
Bool_t
PropagateTo(Double_t p[3],Double_t covyz[3],Double_t covxyz[3],Double_t b);
Bool_t Update(Double_t p[2],Double_t cov[3]);
Bool_t Rotate(Double_t alpha);
Bool_t PropagateTo(Double_t x, Double_t b);
- Bool_t Propagate(Double_t alpha, Double_t x, Double_t b) {
- if (Rotate(alpha))
- if (PropagateTo(x,b)) return kTRUE;
- return kFALSE;
- }
+ Bool_t Propagate(Double_t alpha, Double_t x, Double_t b);
+ Bool_t PropagateBxByBz(Double_t alpha, Double_t x, Double_t b[3]);
void Propagate(Double_t len,Double_t x[3],Double_t p[3],Double_t bz) const;
Bool_t Intersect(Double_t pnt[3], Double_t norm[3], Double_t bz) const;
+ static void g3helx3(Double_t qfield, Double_t step, Double_t vect[7]);
+ Bool_t PropagateToBxByBz(Double_t x, const Double_t b[3]);
+
void GetHelixParameters(Double_t h[6], Double_t b) const;
Double_t GetDCA(const AliExternalTrackParam *p, Double_t b,
Double_t &xthis,Double_t &xp) const;
Double_t PropagateToDCA(AliExternalTrackParam *p, Double_t b);
Bool_t PropagateToDCA(const AliVVertex *vtx, Double_t b, Double_t maxd,
Double_t dz[2]=0, Double_t cov[3]=0);
+ Bool_t PropagateToDCABxByBz(const AliVVertex *vtx, Double_t b[3],
+ Double_t maxd, Double_t dz[2]=0, Double_t cov[3]=0);
void GetDirection(Double_t d[3]) const;
Bool_t GetPxPyPz(Double_t *p) const;
//Deprecated
Bool_t CorrectForMaterial(Double_t d, Double_t x0, Double_t mass,
- Double_t (*f)(Double_t)=ApproximateBetheBloch);
+ Double_t (*f)(Double_t)=AliExternalTrackParam::BetheBlochSolid);
Bool_t GetDistance(AliExternalTrackParam *param2, Double_t x, Double_t dist[3], Double_t b);
- Int_t GetIndex(Int_t i, Int_t j) const {return i+(j+1)*j/2;}
+ Int_t GetIndex(Int_t i, Int_t j) const;
Int_t GetLabel() const {return -1;}
+ Int_t PdgCode() const {return 0;}
+
//
// visualization (M. Ivanov)
//
virtual void FillPolymarker(TPolyMarker3D *pol, Float_t magf, Float_t minR, Float_t maxR, Float_t stepR);
virtual void DrawTrack(Float_t magF, Float_t minR, Float_t maxR, Float_t stepR);
- protected:
+
+ virtual Bool_t Translate(Double_t *vTrasl,Double_t *covV);
+
+ void CheckCovariance();
+
+/* protected: */
+ private:
Double_t &Par(Int_t i) {return fP[i];}
Double_t &Cov(Int_t i) {return fC[i];}
//
// Reset the covarince matrix to "something big"
//
- fC[0]*= s2;
- fC[1] = 0.; fC[2]*= s2;
- fC[3] = 0.; fC[4] = 0.; fC[5]*= s2;
- fC[6] = 0.; fC[7] = 0.; fC[8] = 0.; fC[9]*= s2;
- fC[10]= 0.; fC[11]= 0.; fC[12]= 0.; fC[13]= 0.; fC[14]*=s2;
+
+ s2 = TMath::Abs(s2);
+ Double_t fC0=fC[0]*s2,
+ fC2=fC[2]*s2,
+ fC5=fC[5]*s2,
+ fC9=fC[9]*s2,
+ fC14=fC[14]*s2;
+
+ if (fC0>kC0max) fC0 = kC0max;
+ if (fC2>kC2max) fC2 = kC2max;
+ if (fC5>kC5max) fC5 = kC5max;
+ if (fC9>kC9max) fC9 = kC9max;
+ if (fC14>kC14max) fC14 = kC14max;
+
+
+ fC[0] = fC0;
+ fC[1] = 0.; fC[2] = fC2;
+ fC[3] = 0.; fC[4] = 0.; fC[5] = fC5;
+ fC[6] = 0.; fC[7] = 0.; fC[8] = 0.; fC[9] = fC9;
+ fC[10]= 0.; fC[11]= 0.; fC[12]= 0.; fC[13]= 0.; fC[14] = fC14;
}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff