1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
17 ///////////////////////////////////////////////////////////////////////////////
20 // Comparison class for V0 information //
22 // marian.ivanov@cern.ch //
37 #include "AliESDtrack.h"
38 #include "AliTPCParam.h"
39 #include "AliTrackReference.h"
40 #include "AliTPCParamSR.h"
42 #include "AliESDfriend.h"
43 #include "AliESDtrack.h"
44 #include "AliTPCseed.h"
45 #include "AliITStrackMI.h"
46 #include "AliTRDtrack.h"
48 #include "AliESDVertex.h"
49 #include "AliExternalTrackParam.h"
50 #include "AliESDkink.h"
54 #include "AliTreeDraw.h"
55 #include "AliMCInfo.h"
56 #include "AliGenKinkInfo.h"
57 #include "AliGenV0Info.h"
60 #include "AliESDRecV0Info.h"
64 ClassImp(AliESDRecV0Info)
70 void AliESDRecV0Info::Update(Float_t vertex[3])
73 if ( (fT1.fStatus[1]>0)&& (fT2.fStatus[1]>0)){
74 Float_t distance1,distance2;
77 Double_t xd[3],pd[3],signd;
78 Double_t xm[3],pm[3],signm;
81 if (fT1.fITSOn&&fT2.fITSOn){
82 for (Int_t i=0;i<3;i++){
83 xd[i] = fT2.fITSinR1[i];
84 pd[i] = fT2.fITSinP1[i];
85 xm[i] = fT1.fITSinR1[i];
86 pm[i] = fT1.fITSinP1[i];
91 for (Int_t i=0;i<3;i++){
92 xd[i] = fT2.fTPCinR1[i];
93 pd[i] = fT2.fTPCinP1[i];
94 xm[i] = fT1.fTPCinR1[i];
95 pm[i] = fT1.fTPCinP1[i];
100 signd = fT2.fSign<0 ? -1:1;
101 signm = fT1.fSign<0 ? -1:1;
103 AliHelix dhelix1(xd,pd,signd);
104 dhelix1.GetMomentum(0,pp,0);
105 dhelix1.Evaluate(0,xx);
107 // Double_t x2[3],p2[3];
109 AliHelix mhelix(xm,pm,signm);
111 //find intersection linear
113 Double_t phase[2][2],radius[2];
114 Int_t points = dhelix1.GetRPHIintersections(mhelix, phase, radius,200);
115 Double_t delta1=10000,delta2=10000;
118 fRs[0] = TMath::Sqrt(radius[0]);
119 fRs[1] = TMath::Sqrt(radius[0]);
122 fRs[0] =TMath::Min(TMath::Sqrt(radius[0]),TMath::Sqrt(radius[1]));
123 fRs[1] =TMath::Max(TMath::Sqrt(radius[0]),TMath::Sqrt(radius[1]));
127 dhelix1.LinearDCA(mhelix,phase[0][0],phase[0][1],radius[0],delta1);
128 dhelix1.LinearDCA(mhelix,phase[0][0],phase[0][1],radius[0],delta1);
129 dhelix1.LinearDCA(mhelix,phase[0][0],phase[0][1],radius[0],delta1);
132 dhelix1.LinearDCA(mhelix,phase[1][0],phase[1][1],radius[1],delta2);
133 dhelix1.LinearDCA(mhelix,phase[1][0],phase[1][1],radius[1],delta2);
134 dhelix1.LinearDCA(mhelix,phase[1][0],phase[1][1],radius[1],delta2);
137 fRs[0] = TMath::Sqrt(radius[0]);
138 fRs[1] = TMath::Sqrt(radius[0]);
142 if (radius[0]<radius[1]){
143 fRs[0] = TMath::Sqrt(radius[0]);
144 fRs[1] = TMath::Sqrt(radius[1]);
148 fRs[0] = TMath::Sqrt(radius[1]);
149 fRs[1] = TMath::Sqrt(radius[0]);
155 distance1 = TMath::Min(delta1,delta2);
157 //find intersection parabolic
159 points = dhelix1.GetRPHIintersections(mhelix, phase, radius);
160 delta1=10000,delta2=10000;
163 dhelix1.ParabolicDCA(mhelix,phase[0][0],phase[0][1],radius[0],delta1);
166 dhelix1.ParabolicDCA(mhelix,phase[1][0],phase[1][1],radius[1],delta2);
169 distance2 = TMath::Min(delta1,delta2);
170 if (distance2>100) fDist2 =100;
174 dhelix1.Evaluate(phase[0][0],fXr);
175 dhelix1.GetMomentum(phase[0][0],fPdr);
176 mhelix.GetMomentum(phase[0][1],fPm);
177 dhelix1.GetAngle(phase[0][0],mhelix,phase[0][1],fAngle);
178 fRr = TMath::Sqrt(radius[0]);
181 dhelix1.Evaluate(phase[1][0],fXr);
182 dhelix1.GetMomentum(phase[1][0], fPdr);
183 mhelix.GetMomentum(phase[1][1], fPm);
184 dhelix1.GetAngle(phase[1][0],mhelix,phase[1][1],fAngle);
185 fRr = TMath::Sqrt(radius[1]);
187 fDist1 = TMath::Sqrt(distance1);
188 fDist2 = TMath::Sqrt(distance2);
191 Double_t x,alpha,param[5],cov[15];
193 fT1.GetESDtrack()->GetInnerExternalParameters(alpha,x,param);
194 fT1.GetESDtrack()->GetInnerExternalCovariance(cov);
195 AliExternalTrackParam paramm(x,alpha,param,cov);
197 fT2.GetESDtrack()->GetInnerExternalParameters(alpha,x,param);
198 fT2.GetESDtrack()->GetInnerExternalCovariance(cov);
199 AliExternalTrackParam paramd(x,alpha,param,cov);
204 Float_t v[3] = {fXr[0]-vertex[0],fXr[1]-vertex[1],fXr[2]-vertex[2]};
205 Float_t p[3] = {fPdr[0]+fPm[0], fPdr[1]+fPm[1],fPdr[2]+fPm[2]};
207 Float_t vnorm2 = v[0]*v[0]+v[1]*v[1];
208 Float_t vnorm3 = TMath::Sqrt(v[2]*v[2]+vnorm2);
209 vnorm2 = TMath::Sqrt(vnorm2);
210 Float_t pnorm2 = p[0]*p[0]+p[1]*p[1];
211 Float_t pnorm3 = TMath::Sqrt(p[2]*p[2]+pnorm2);
212 pnorm2 = TMath::Sqrt(pnorm2);
214 fPointAngleFi = (v[0]*p[0]+v[1]*p[1])/(vnorm2*pnorm2);
215 fPointAngleTh = (v[2]*p[2]+vnorm2*pnorm2)/(vnorm3*pnorm3);
216 fPointAngle = (v[0]*p[0]+v[1]*p[1]+v[2]*p[2])/(vnorm3*pnorm3);