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)
67 AliESDRecV0Info:: AliESDRecV0Info():
71 fDist1(0), //info about closest distance according closest MC - linear DCA
72 fDist2(0), //info about closest distance parabolic DCA
73 fInvMass(0), //reconstructed invariant mass -
75 fDistMinR(0), // distance at minimal radius
76 fRr(0), // rec position of the vertex
77 fPointAngleFi(0), //point angle fi
78 fPointAngleTh(0), //point angle theta
79 fPointAngle(0), //point angle full
80 fV0Status(0), // status of the kink
81 fV0tpc(0), // Vo information from reconsturction according TPC
82 fV0its(0), // Vo information from reconsturction according ITS
83 fV0rec(0), // V0 information form the reconstruction
84 fMultiple(0), // how man times V0 was recostructed
85 fV0Multiple(0), // how man times was V0 reconstucted
86 fRecStatus(0) // status form the reconstuction
89 // default constructor
94 void AliESDRecV0Info::Update(Float_t vertex[3])
97 if ( (fT1.fStatus[1]>0)&& (fT2.fStatus[1]>0)){
98 Float_t distance1,distance2;
101 Double_t xd[3],pd[3],signd;
102 Double_t xm[3],pm[3],signm;
105 if (fT1.fITSOn&&fT2.fITSOn){
106 for (Int_t i=0;i<3;i++){
107 xd[i] = fT2.fITSinR1[i];
108 pd[i] = fT2.fITSinP1[i];
109 xm[i] = fT1.fITSinR1[i];
110 pm[i] = fT1.fITSinP1[i];
115 for (Int_t i=0;i<3;i++){
116 xd[i] = fT2.fTPCinR1[i];
117 pd[i] = fT2.fTPCinP1[i];
118 xm[i] = fT1.fTPCinR1[i];
119 pm[i] = fT1.fTPCinP1[i];
124 signd = fT2.fSign<0 ? -1:1;
125 signm = fT1.fSign<0 ? -1:1;
127 AliHelix dhelix1(xd,pd,signd);
128 dhelix1.GetMomentum(0,pp,0);
129 dhelix1.Evaluate(0,xx);
131 // Double_t x2[3],p2[3];
133 AliHelix mhelix(xm,pm,signm);
135 //find intersection linear
137 Double_t phase[2][2],radius[2];
138 Int_t points = dhelix1.GetRPHIintersections(mhelix, phase, radius,200);
139 Double_t delta1=10000,delta2=10000;
142 fRs[0] = TMath::Sqrt(radius[0]);
143 fRs[1] = TMath::Sqrt(radius[0]);
146 fRs[0] =TMath::Min(TMath::Sqrt(radius[0]),TMath::Sqrt(radius[1]));
147 fRs[1] =TMath::Max(TMath::Sqrt(radius[0]),TMath::Sqrt(radius[1]));
151 dhelix1.LinearDCA(mhelix,phase[0][0],phase[0][1],radius[0],delta1);
152 dhelix1.LinearDCA(mhelix,phase[0][0],phase[0][1],radius[0],delta1);
153 dhelix1.LinearDCA(mhelix,phase[0][0],phase[0][1],radius[0],delta1);
156 dhelix1.LinearDCA(mhelix,phase[1][0],phase[1][1],radius[1],delta2);
157 dhelix1.LinearDCA(mhelix,phase[1][0],phase[1][1],radius[1],delta2);
158 dhelix1.LinearDCA(mhelix,phase[1][0],phase[1][1],radius[1],delta2);
161 fRs[0] = TMath::Sqrt(radius[0]);
162 fRs[1] = TMath::Sqrt(radius[0]);
166 if (radius[0]<radius[1]){
167 fRs[0] = TMath::Sqrt(radius[0]);
168 fRs[1] = TMath::Sqrt(radius[1]);
172 fRs[0] = TMath::Sqrt(radius[1]);
173 fRs[1] = TMath::Sqrt(radius[0]);
179 distance1 = TMath::Min(delta1,delta2);
181 //find intersection parabolic
183 points = dhelix1.GetRPHIintersections(mhelix, phase, radius);
184 delta1=10000,delta2=10000;
187 dhelix1.ParabolicDCA(mhelix,phase[0][0],phase[0][1],radius[0],delta1);
190 dhelix1.ParabolicDCA(mhelix,phase[1][0],phase[1][1],radius[1],delta2);
193 distance2 = TMath::Min(delta1,delta2);
194 if (distance2>100) fDist2 =100;
198 dhelix1.Evaluate(phase[0][0],fXr);
199 dhelix1.GetMomentum(phase[0][0],fPdr);
200 mhelix.GetMomentum(phase[0][1],fPm);
201 dhelix1.GetAngle(phase[0][0],mhelix,phase[0][1],fAngle);
202 fRr = TMath::Sqrt(radius[0]);
205 dhelix1.Evaluate(phase[1][0],fXr);
206 dhelix1.GetMomentum(phase[1][0], fPdr);
207 mhelix.GetMomentum(phase[1][1], fPm);
208 dhelix1.GetAngle(phase[1][0],mhelix,phase[1][1],fAngle);
209 fRr = TMath::Sqrt(radius[1]);
211 fDist1 = TMath::Sqrt(distance1);
212 fDist2 = TMath::Sqrt(distance2);
215 Double_t x,alpha,param[5],cov[15];
217 fT1.GetESDtrack()->GetInnerExternalParameters(alpha,x,param);
218 fT1.GetESDtrack()->GetInnerExternalCovariance(cov);
219 AliExternalTrackParam paramm(x,alpha,param,cov);
221 fT2.GetESDtrack()->GetInnerExternalParameters(alpha,x,param);
222 fT2.GetESDtrack()->GetInnerExternalCovariance(cov);
223 AliExternalTrackParam paramd(x,alpha,param,cov);
228 Float_t v[3] = {fXr[0]-vertex[0],fXr[1]-vertex[1],fXr[2]-vertex[2]};
229 Float_t p[3] = {fPdr[0]+fPm[0], fPdr[1]+fPm[1],fPdr[2]+fPm[2]};
231 Float_t vnorm2 = v[0]*v[0]+v[1]*v[1];
232 Float_t vnorm3 = TMath::Sqrt(v[2]*v[2]+vnorm2);
233 vnorm2 = TMath::Sqrt(vnorm2);
234 Float_t pnorm2 = p[0]*p[0]+p[1]*p[1];
235 Float_t pnorm3 = TMath::Sqrt(p[2]*p[2]+pnorm2);
236 pnorm2 = TMath::Sqrt(pnorm2);
238 fPointAngleFi = (v[0]*p[0]+v[1]*p[1])/(vnorm2*pnorm2);
239 fPointAngleTh = (v[2]*p[2]+vnorm2*pnorm2)/(vnorm3*pnorm3);
240 fPointAngle = (v[0]*p[0]+v[1]*p[1]+v[2]*p[2])/(vnorm3*pnorm3);