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 ///////////////////////////////////////////////////////////////////////////////
19 // Time Projection Chamber //
20 // Comparison macro for reconstructed tracks - ESDs V0s //
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"
58 #include "AliESDRecKinkInfo.h"
62 ClassImp(AliESDRecKinkInfo)
66 AliESDRecKinkInfo::AliESDRecKinkInfo():
70 fDist1(0), //info about closest distance according closest MC - linear DCA
71 fDist2(0), //info about closest distance parabolic DCA
72 fInvMass(0), //reconstructed invariant mass -
74 fRr(0), // rec position of the vertex
75 fMinR(0), // minimum radius in rphi intersection
76 fDistMinR(0), // distance at minimal radius
77 fPointAngleFi(0), //point angle fi
78 fPointAngleTh(0), //point angle theta
79 fPointAngle(0), //point angle full
80 fStatus(0), //status -tracks
81 fRecStatus(0), //kink -status- 0 - not found 1-good - fake
82 fMultiple(0), // how many times was kink reconstructed
83 fKinkMultiple(0) // how many times was kink reconstructed
86 // Default constructor
91 void AliESDRecKinkInfo::Update()
94 if ( (fT1.fTPCOn)&& (fT2.fTPCOn)){
96 // IF BOTH RECONSTRUCTED
97 Float_t distance1,distance2;
100 Double_t xd[3],pd[3],signd;
101 Double_t xm[3],pm[3],signm;
102 for (Int_t i=0;i<3;i++){
103 xd[i] = fT2.fTPCinR1[i];
104 pd[i] = fT2.fTPCinP1[i];
105 xm[i] = fT1.fTPCinR1[i];
106 pm[i] = fT1.fTPCinP1[i];
108 signd = fT2.fSign<0 ? -1:1;
109 signm = fT1.fSign<0 ? -1:1;
111 AliHelix dhelix1(xd,pd,signd);
112 dhelix1.GetMomentum(0,pp,0);
113 dhelix1.Evaluate(0,xx);
115 // Double_t x2[3],p2[3];
117 AliHelix mhelix(xm,pm,signm);
119 //find intersection linear
121 Double_t phase[2][2],radius[2];
122 Int_t points = dhelix1.GetRPHIintersections(mhelix, phase, radius,200);
123 Double_t delta1=10000,delta2=10000;
126 fMinR = TMath::Sqrt(radius[0]);
129 fMinR =TMath::Min(TMath::Sqrt(radius[0]),TMath::Sqrt(radius[1]));
133 dhelix1.LinearDCA(mhelix,phase[0][0],phase[0][1],radius[0],delta1);
134 dhelix1.LinearDCA(mhelix,phase[0][0],phase[0][1],radius[0],delta1);
135 dhelix1.LinearDCA(mhelix,phase[0][0],phase[0][1],radius[0],delta1);
138 dhelix1.LinearDCA(mhelix,phase[1][0],phase[1][1],radius[1],delta2);
139 dhelix1.LinearDCA(mhelix,phase[1][0],phase[1][1],radius[1],delta2);
140 dhelix1.LinearDCA(mhelix,phase[1][0],phase[1][1],radius[1],delta2);
143 fMinR = TMath::Sqrt(radius[0]);
147 if (radius[0]<radius[1]){
148 fMinR = TMath::Sqrt(radius[0]);
152 fMinR = TMath::Sqrt(radius[1]);
158 distance1 = TMath::Min(delta1,delta2);
160 //find intersection parabolic
162 points = dhelix1.GetRPHIintersections(mhelix, phase, radius);
163 delta1=10000,delta2=10000;
166 dhelix1.ParabolicDCA(mhelix,phase[0][0],phase[0][1],radius[0],delta1);
169 dhelix1.ParabolicDCA(mhelix,phase[1][0],phase[1][1],radius[1],delta2);
172 distance2 = TMath::Min(delta1,delta2);
175 dhelix1.Evaluate(phase[0][0],fXr);
176 dhelix1.GetMomentum(phase[0][0],fPdr);
177 mhelix.GetMomentum(phase[0][1],fPm);
178 dhelix1.GetAngle(phase[0][0],mhelix,phase[0][1],fAngle);
179 fRr = TMath::Sqrt(radius[0]);
182 dhelix1.Evaluate(phase[1][0],fXr);
183 dhelix1.GetMomentum(phase[1][0], fPdr);
184 mhelix.GetMomentum(phase[1][1], fPm);
185 dhelix1.GetAngle(phase[1][0],mhelix,phase[1][1],fAngle);
186 fRr = TMath::Sqrt(radius[1]);
188 fDist1 = TMath::Sqrt(distance1);
189 fDist2 = TMath::Sqrt(distance2);
192 Double_t x,alpha,param[5],cov[15];
194 fT1.GetESDtrack()->GetInnerExternalParameters(alpha,x,param);
195 fT1.GetESDtrack()->GetInnerExternalCovariance(cov);
196 AliExternalTrackParam paramm(x,alpha,param,cov);
198 fT2.GetESDtrack()->GetInnerExternalParameters(alpha,x,param);
199 fT2.GetESDtrack()->GetInnerExternalCovariance(cov);
200 AliExternalTrackParam paramd(x,alpha,param,cov);
203 kink.Update(¶mm,¶md);
205 Double_t diff = kink.fRr-fRr;
206 Double_t diff2 = kink.fDist2-fDist2;
207 printf("Diff\t%f\t%f\n",diff,diff2);