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51ad6848 | 1 | /************************************************************************** |
2 | * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
3 | * * | |
4 | * Author: The ALICE Off-line Project. * | |
5 | * Contributors are mentioned in the code where appropriate. * | |
6 | * * | |
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 | **************************************************************************/ | |
15 | ||
16 | /* $Id$ */ | |
17 | ||
18 | //------------------------------------------------------------------------- | |
19 | // Origin: Marian Ivanov marian.ivanov@cern.ch | |
20 | //------------------------------------------------------------------------- | |
21 | ||
22 | #include <Riostream.h> | |
23 | #include <TMath.h> | |
24 | #include <TPDGCode.h> | |
25 | #include "AliESDkink.h" | |
26 | #include "AliHelix.h" | |
27 | ||
28 | ||
29 | ClassImp(AliESDkink) | |
30 | ||
90e48c0c | 31 | //____________________________________________________________________ |
32 | AliESDkink::AliESDkink() : | |
33 | TObject(), | |
34 | fID(0), | |
35 | fParamDaughter(), | |
36 | fParamMother(), | |
37 | fDist1(-1), | |
38 | fDist2(-1), | |
39 | fRr(-1), | |
40 | fShapeFactor(0), | |
41 | fRow0(-1) | |
42 | { | |
51ad6848 | 43 | // |
44 | //Dafault constructor | |
45 | // | |
7c97ee80 | 46 | for (Int_t i=0;i<12;i++) fStatus[i]=0; |
7c97ee80 | 47 | for (Int_t i=0;i<2;i++) |
48 | for (Int_t j=0;j<2;j++){ | |
49 | fTPCdensity[i][j]=-1; | |
50 | fTPCdensity2[i][j]=-1; | |
51 | } | |
52 | fTPCncls[0]=0; | |
53 | fTPCncls[1]=0; | |
51ad6848 | 54 | } |
55 | ||
56 | void AliESDkink::SetMother(const AliExternalTrackParam & pmother) { | |
57 | // | |
58 | // set mother | |
59 | // | |
60 | fParamMother = pmother; | |
61 | } | |
62 | ||
63 | void AliESDkink::SetDaughter(const AliExternalTrackParam & pdaughter){ | |
64 | // | |
65 | //set daughter | |
66 | // | |
67 | fParamDaughter = pdaughter; | |
68 | ||
69 | } | |
70 | ||
71 | void AliESDkink::Update() | |
72 | { | |
73 | // | |
74 | // updates Kink Info | |
75 | // | |
7c97ee80 | 76 | Float_t distance2=1000; |
51ad6848 | 77 | // |
78 | AliHelix dhelix1(fParamDaughter); | |
79 | AliHelix mhelix(fParamMother); | |
80 | // | |
81 | //find intersection linear | |
82 | // | |
83 | Double_t phase[2][2],radius[2]; | |
51ad6848 | 84 | Double_t delta1=10000,delta2=10000; |
7c97ee80 | 85 | Int_t points=0; |
86 | /* | |
87 | Float_t distance1=0; | |
88 | Int_t points = dhelix1.GetRPHIintersections(mhelix, phase, radius,200); | |
51ad6848 | 89 | |
90 | if (points>0){ | |
91 | dhelix1.LinearDCA(mhelix,phase[0][0],phase[0][1],radius[0],delta1); | |
51ad6848 | 92 | } |
93 | if (points==2){ | |
94 | dhelix1.LinearDCA(mhelix,phase[1][0],phase[1][1],radius[1],delta2); | |
51ad6848 | 95 | } |
96 | distance1 = TMath::Min(delta1,delta2); | |
7c97ee80 | 97 | */ |
51ad6848 | 98 | // |
99 | //find intersection parabolic | |
100 | // | |
7c97ee80 | 101 | points = dhelix1.GetRPHIintersections(mhelix, phase, radius,7); |
102 | ||
51ad6848 | 103 | delta1=10000,delta2=10000; |
104 | Double_t d1=1000.,d2=10000.; | |
105 | if (points>0){ | |
7c97ee80 | 106 | dhelix1.ParabolicDCA(mhelix,phase[0][0],phase[0][1],radius[0],delta1,6); |
107 | // dhelix1.ParabolicDCA(mhelix,phase[0][0],phase[0][1],radius[0],delta1); | |
51ad6848 | 108 | Double_t xd[3],xm[3]; |
109 | dhelix1.Evaluate(phase[0][0],xd); | |
110 | mhelix.Evaluate(phase[0][1],xm); | |
111 | d1 = (xd[0]-xm[0])*(xd[0]-xm[0])+(xd[1]-xm[1])*(xd[1]-xm[1])+(xd[2]-xm[2])*(xd[2]-xm[2]); | |
112 | } | |
113 | if (points==2){ | |
7c97ee80 | 114 | dhelix1.ParabolicDCA(mhelix,phase[1][0],phase[1][1],radius[1],delta2,6); |
115 | //dhelix1.ParabolicDCA(mhelix,phase[1][0],phase[1][1],radius[1],delta2); | |
51ad6848 | 116 | Double_t xd[3],xm[3]; |
117 | dhelix1.Evaluate(phase[1][0],xd); | |
118 | mhelix.Evaluate(phase[1][1],xm); | |
119 | d2 = (xd[0]-xm[0])*(xd[0]-xm[0])+(xd[1]-xm[1])*(xd[1]-xm[1])+(xd[2]-xm[2])*(xd[2]-xm[2]); | |
120 | } | |
121 | // | |
122 | distance2 = TMath::Min(delta1,delta2); | |
123 | if (delta1<delta2){ | |
124 | //get V0 info | |
125 | // dhelix1.Evaluate(phase[0][0],fXr); | |
126 | Double_t xd[3],xm[3]; | |
127 | dhelix1.Evaluate(phase[0][0],xd); | |
128 | mhelix.Evaluate(phase[0][1], xm); | |
129 | fXr[0] = 0.5*(xd[0]+xm[0]); | |
130 | fXr[1] = 0.5*(xd[1]+xm[1]); | |
131 | fXr[2] = 0.5*(xd[2]+xm[2]); | |
132 | // | |
133 | dhelix1.GetMomentum(phase[0][0],fPdr); | |
134 | mhelix.GetMomentum(phase[0][1],fPm); | |
135 | dhelix1.GetAngle(phase[0][0],mhelix,phase[0][1],fAngle); | |
136 | //fRr = TMath::Sqrt(radius[0]); | |
137 | fRr = TMath::Sqrt(fXr[0]*fXr[0]+fXr[1]*fXr[1]); | |
138 | } | |
139 | else{ | |
140 | //dhelix1.Evaluate(phase[1][0],fXr); | |
141 | Double_t xd[3],xm[3]; | |
142 | dhelix1.Evaluate(phase[1][0],xd); | |
143 | mhelix.Evaluate(phase[1][1], xm); | |
144 | fXr[0] = 0.5*(xd[0]+xm[0]); | |
145 | fXr[1] = 0.5*(xd[1]+xm[1]); | |
146 | fXr[2] = 0.5*(xd[2]+xm[2]); | |
147 | // | |
148 | dhelix1.GetMomentum(phase[1][0], fPdr); | |
149 | mhelix.GetMomentum(phase[1][1], fPm); | |
150 | dhelix1.GetAngle(phase[1][0],mhelix,phase[1][1],fAngle); | |
151 | // fRr = TMath::Sqrt(radius[1]); | |
152 | fRr = TMath::Sqrt(fXr[0]*fXr[0]+fXr[1]*fXr[1]); | |
153 | } | |
154 | fDist1 = TMath::Sqrt(TMath::Min(d1,d2)); | |
155 | fDist2 = TMath::Sqrt(distance2); | |
156 | // | |
157 | // | |
158 | ||
159 | } | |
160 | ||
161 | ||
162 | Float_t AliESDkink::GetTPCDensityFactor() const | |
163 | { | |
164 | // | |
165 | // | |
166 | return fTPCdensity[0][0]+fTPCdensity[1][1]-TMath::Max(fTPCdensity[0][1],Float_t(0.0))-TMath::Max(fTPCdensity[1][0],Float_t(0.0)); | |
167 | } | |
168 | ||
169 | Float_t AliESDkink::GetQt() const | |
170 | { | |
171 | Float_t dmomentum = TMath::Sqrt(fPdr[0]*fPdr[0]+fPdr[1]*fPdr[1]+fPdr[2]*fPdr[2]); | |
172 | return TMath::Sin(fAngle[2])*dmomentum; | |
173 | } |