2 // Main authors: Matevz Tadel & Alja Mrak-Tadel: 2006, 2007
4 /**************************************************************************
5 * Copyright(c) 1998-2008, ALICE Experiment at CERN, all rights reserved. *
6 * See http://aliceinfo.cern.ch/Offline/AliRoot/License.html for *
7 * full copyright notice. *
8 **************************************************************************/
10 void esd_cascade_init_rectrack(TEveRecTrack& rt, AliExternalTrackParam* tp)
12 Double_t pbuf[3], vbuf[3];
14 rt.fSign = tp->GetSign();
15 tp->GetXYZ(vbuf); rt.fV.Set(vbuf);
16 tp->GetPxPyPz(pbuf); rt.fP.Set(pbuf);
17 // Double_t ep = at->GetP(), mc = at->GetMass();
18 rt.fBeta = 1; // ep/TMath::Sqrt(ep*ep + mc*mc);
21 AliEveCascade* esd_make_cascade(TEveTrackPropagator* rnrStyle, AliESDVertex* primVtx,
22 AliESDtrack* bac, AliESDcascade* cascade, Int_t i)
29 TEveRecCascade rcCascade;
32 cascade->GetXYZ(v[0], v[1], v[2]);
35 cascade->GetParamN()->GetXYZ(v); rcV0.fVNeg.Set(v);
36 cascade->GetParamP()->GetXYZ(v); rcV0.fVPos.Set(v);
38 rcV0.fV0Birth.Set(primVtx->GetXv(), primVtx->GetYv(), primVtx->GetZv());
40 Double_t pCascade[3]={0.}, pBac[3]={0.}, pNeg[3]={0.}, pPos[3]={0.}, cv[21]={0.};
41 //cascade->GetPxPyPz(pCascade[0], pCascade[1], pCascade[2]);
42 cascade->GetBPxPyPz(pBac[0], pBac[1], pBac[2]);
43 cascade->GetNPxPyPz(pNeg[0], pNeg[1], pNeg[2]);
44 cascade->GetPPxPyPz(pPos[0], pPos[1], pPos[2]);
46 rcCascade.fPBac.Set(pBac);
51 printf("\n ESD info \n");
52 printf("Neg : px = %.5f, py = %.5f, pz = %.5f \n",pNeg[0], pNeg[1], pNeg[2]);
53 printf("Pos : px = %.5f, py = %.5f, pz = %.5f \n",pPos[0], pPos[1], pPos[2]);
54 printf("Bach : px = %.5f, py = %.5f, pz = %.5f \n",pBac[0], pBac[1], pBac[2]);
56 printf("\n EVE info \n");
57 printf("Neg : px = %.5f, py = %.5f, pz = %.5f \n",rcV0.fPNeg.fX, rcV0.fPNeg.fY, rcV0.fPNeg.fZ);
58 printf("Pos : px = %.5f, py = %.5f, pz = %.5f \n",rcV0.fPPos.fX, rcV0.fPPos.fY, rcV0.fPPos.fZ);
59 printf("Bach : px = %.5f, py = %.5f, pz = %.5f \n",rcCascade.fPBac.fX,rcCascade.fPBac.fY,rcCascade.fPBac.fZ);
61 Double_t pLambda = TMath::Sqrt((pNeg[0]+pPos[0])* (pNeg[0]+pPos[0]) +
62 (pNeg[1]+pPos[1])* (pNeg[1]+pPos[1]) +
63 (pNeg[2]+pPos[2])* (pNeg[2]+pPos[2]) );
64 Double_t pBach = TMath::Sqrt( pBac[0]*pBac[0] + pBac[1]*pBac[1] + pBac[2]*pBac[2]);
66 cascade->GetXYZcascade(v[0], v[1], v[2]);
67 rcCascade.fCascadeVCa.Set(v);
69 rcCascade.fCascadeBirth.Set(primVtx->GetXv(), primVtx->GetYv(), primVtx->GetZv());
71 // Simulation data not directly available in AliESDcascade
72 // rcCascade.fDLabel = cascade->GetBindex();
74 // Problem: two following lines are not possible: no GetParamB !!
75 // cascade->GetParamB()->GetXYZ(v); rcCascade.fVBac.Set(v);
76 // esd_cascade_init_rectrack(rcBac, cascade->GetParamB());
77 // Solution: create an AliExternalTrackParam with null cv...
78 AliExternalTrackParam *bParam = new AliExternalTrackParam(v,pBac,cv,cascade->Charge());
79 esd_cascade_init_rectrack(rcBac,bParam);
80 rcBac.fIndex = cascade->GetBindex();
82 esd_cascade_init_rectrack(rcNeg, cascade->GetParamN());
83 rcNeg.fIndex = cascade->GetNindex();
84 esd_cascade_init_rectrack(rcPos, cascade->GetParamP());
85 rcPos.fIndex = cascade->GetPindex();
90 TEveVector BacMom = rcBac.GetMomentum();
91 printf("Bac mom : px = %f, py = %f, pz =%f, Ptot = %f \n", BacMom.fX,
92 rcBac.GetMomentum().fY,
96 AliEveCascade* myCascade = new AliEveCascade(&rcBac, &rcNeg, &rcPos, &rcV0, &rcCascade, rnrStyle);
97 myCascade->SetElementName(Form("ESDcascade %d", i));
101 TEveVector CascMom(rcCascade.fPBac + rcV0.fPNeg + rcV0.fPPos);
102 printf("Casc mom : px = %f, py = %f, pz =%f, Ptot = %f \n", CascMom.fX, CascMom.fY, CascMom.fZ, CascMom.Mag());
104 myCascade->SetElementTitle(Form("Info coming directly from AliESDcascade : \n - Charge : %d \n - Cascade decay position : x = %.4f, y = %.4f, z = %.4f, Transv. radius = %.4f cm, Decay Length = %.4f cm\n\n - Pt(Cascade) : %f GeV/c, Ptot(Cascade): %f GeV/c\n - Lambda : px = %.4f, py = %.4f, pz = %.4f, Ptot : %f GeV/c\n - Bach : px = %.4f, py = %.4f, pz = %.4f, Ptot : %f GeV/c\n\n - Eta : %f\n - Phi : %f deg \n - Theta : %f deg\n - DCA : %f cm \n - Cos(Ptg Angle) : %f \n\n - Eff. mass (Xi hyp) : %f GeV/c2",
106 v[0], v[1], v[2], TMath::Sqrt(v[0]*v[0] +v[1]*v[1]), TMath::Sqrt(v[0]*v[0] +v[1]*v[1] + v[2]*v[2] ),
107 cascade->Pt(), cascade->P(),
108 pNeg[0]+pPos[0], pNeg[1]+pPos[1], pNeg[2]+pPos[2], pLambda,
109 pBac[0], pBac[1], pBac[2], pBach,
111 cascade->Phi() * 180/TMath::Pi(),
112 cascade->Theta() * 180/TMath::Pi(),
113 cascade->GetDcaXiDaughters(),
114 cascade->GetCascadeCosineOfPointingAngle(primVtx->GetXv(),
117 cascade->GetEffMassXi()
122 myCascade->SetESDIndex(i);
123 myCascade->SetDaughterDCA(cascade->GetDcaXiDaughters());
124 myCascade->SetLambdaP( pNeg[0]+pPos[0], pNeg[1]+pPos[1], pNeg[2]+pPos[2] );
125 myCascade->SetBachP( pBac[0], pBac[1], pBac[2]);
130 AliEveCascadeList* esd_cascade()
132 AliESDEvent* esd = AliEveEventManager::AssertESD();
134 AliESDVertex* primVertex = (AliESDVertex*) esd->GetPrimaryVertex();
136 AliEveCascadeList* cont = new AliEveCascadeList("ESD cascade");
137 cont->SetMainColor(kBlue+2);
138 TEveTrackPropagator* rnrStyle = cont->GetPropagator();
139 rnrStyle->SetMagField( 0.1*esd->GetMagneticField() );
141 gEve->AddElement(cont);
144 for (Int_t n=0; n<esd->GetNumberOfCascades(); ++n)
146 AliESDcascade *cascade = esd->GetCascade(n);
148 Int_t bacInd = cascade->GetBindex();
149 AliESDtrack* bacTr = esd->GetTrack(bacInd);
151 AliEveCascade* myCascade = esd_make_cascade(rnrStyle, primVertex, bacTr, cascade, n);
154 gEve->AddElement(myCascade, cont);
159 cont->SetTitle("Cascade candidates (reco)");
161 cont->MakeCascades();