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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 | ||
31 | AliESDkink::AliESDkink(){ | |
32 | // | |
33 | //Dafault constructor | |
34 | // | |
9035eb72 | 35 | fID = -1; |
36 | fDist1 = -1; | |
37 | fDist2 = -1; | |
38 | fPdr[0] = 0; | |
39 | fPdr[1] = 0; | |
40 | fPdr[2] = 0; | |
41 | fXr[0] = 0; | |
42 | fXr[1] = 0; | |
43 | fXr[2] = 0; | |
44 | fPm[0] = 0; | |
45 | fPm[1] = 0; | |
46 | fPm[2] = 0; | |
47 | fAngle[0] = 0; | |
48 | fAngle[1] = 0; | |
49 | fAngle[2] = 0; | |
50 | fRr = -1; | |
51 | fLab[0] = -1; | |
52 | fLab[1] = -1; | |
53 | fIndex[0] = -1; | |
54 | fIndex[1] = -1; | |
51ad6848 | 55 | fStatus = 0; |
9035eb72 | 56 | fTPCdensity[0][0]=-1; |
57 | fTPCdensity[0][1]=-1; | |
58 | fTPCdensity[1][0]=-1; | |
59 | fTPCdensity[1][1]=-1; | |
51ad6848 | 60 | fTPCdensity2[0][0]=-1; |
61 | fTPCdensity2[0][1]=-1; | |
9035eb72 | 62 | fTPCdensity2[1][0]=-1; |
63 | fTPCdensity2[1][1]=-1; | |
64 | fShapeFactor = 0; | |
65 | fRow0 =-1; | |
66 | fMultiple[0] = 0; | |
67 | fMultiple[1] = 0; | |
68 | fZm[0] = 0; | |
69 | fZm[1] = 0; | |
70 | fFi[0] = 0; | |
71 | fFi[1] = 0; | |
51ad6848 | 72 | } |
73 | ||
74 | void AliESDkink::SetMother(const AliExternalTrackParam & pmother) { | |
75 | // | |
76 | // set mother | |
77 | // | |
78 | fParamMother = pmother; | |
79 | } | |
80 | ||
81 | void AliESDkink::SetDaughter(const AliExternalTrackParam & pdaughter){ | |
82 | // | |
83 | //set daughter | |
84 | // | |
85 | fParamDaughter = pdaughter; | |
86 | ||
87 | } | |
88 | ||
89 | void AliESDkink::Update() | |
90 | { | |
91 | // | |
92 | // updates Kink Info | |
93 | // | |
94 | Float_t distance1,distance2; | |
95 | // | |
96 | AliHelix dhelix1(fParamDaughter); | |
97 | AliHelix mhelix(fParamMother); | |
98 | // | |
99 | //find intersection linear | |
100 | // | |
101 | Double_t phase[2][2],radius[2]; | |
102 | Int_t points = dhelix1.GetRPHIintersections(mhelix, phase, radius,200); | |
103 | Double_t delta1=10000,delta2=10000; | |
104 | ||
105 | if (points>0){ | |
106 | dhelix1.LinearDCA(mhelix,phase[0][0],phase[0][1],radius[0],delta1); | |
107 | dhelix1.LinearDCA(mhelix,phase[0][0],phase[0][1],radius[0],delta1); | |
108 | dhelix1.LinearDCA(mhelix,phase[0][0],phase[0][1],radius[0],delta1); | |
109 | } | |
110 | if (points==2){ | |
111 | dhelix1.LinearDCA(mhelix,phase[1][0],phase[1][1],radius[1],delta2); | |
112 | dhelix1.LinearDCA(mhelix,phase[1][0],phase[1][1],radius[1],delta2); | |
113 | dhelix1.LinearDCA(mhelix,phase[1][0],phase[1][1],radius[1],delta2); | |
114 | } | |
115 | distance1 = TMath::Min(delta1,delta2); | |
116 | // | |
117 | //find intersection parabolic | |
118 | // | |
119 | points = dhelix1.GetRPHIintersections(mhelix, phase, radius); | |
120 | delta1=10000,delta2=10000; | |
121 | Double_t d1=1000.,d2=10000.; | |
122 | if (points>0){ | |
123 | dhelix1.ParabolicDCA(mhelix,phase[0][0],phase[0][1],radius[0],delta1); | |
124 | dhelix1.ParabolicDCA(mhelix,phase[0][0],phase[0][1],radius[0],delta1); | |
125 | Double_t xd[3],xm[3]; | |
126 | dhelix1.Evaluate(phase[0][0],xd); | |
127 | mhelix.Evaluate(phase[0][1],xm); | |
128 | 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]); | |
129 | } | |
130 | if (points==2){ | |
131 | dhelix1.ParabolicDCA(mhelix,phase[1][0],phase[1][1],radius[1],delta2); | |
132 | dhelix1.ParabolicDCA(mhelix,phase[1][0],phase[1][1],radius[1],delta2); | |
133 | Double_t xd[3],xm[3]; | |
134 | dhelix1.Evaluate(phase[1][0],xd); | |
135 | mhelix.Evaluate(phase[1][1],xm); | |
136 | 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]); | |
137 | } | |
138 | // | |
139 | distance2 = TMath::Min(delta1,delta2); | |
140 | if (delta1<delta2){ | |
141 | //get V0 info | |
142 | // dhelix1.Evaluate(phase[0][0],fXr); | |
143 | Double_t xd[3],xm[3]; | |
144 | dhelix1.Evaluate(phase[0][0],xd); | |
145 | mhelix.Evaluate(phase[0][1], xm); | |
146 | fXr[0] = 0.5*(xd[0]+xm[0]); | |
147 | fXr[1] = 0.5*(xd[1]+xm[1]); | |
148 | fXr[2] = 0.5*(xd[2]+xm[2]); | |
149 | // | |
150 | dhelix1.GetMomentum(phase[0][0],fPdr); | |
151 | mhelix.GetMomentum(phase[0][1],fPm); | |
152 | dhelix1.GetAngle(phase[0][0],mhelix,phase[0][1],fAngle); | |
153 | //fRr = TMath::Sqrt(radius[0]); | |
154 | fRr = TMath::Sqrt(fXr[0]*fXr[0]+fXr[1]*fXr[1]); | |
155 | } | |
156 | else{ | |
157 | //dhelix1.Evaluate(phase[1][0],fXr); | |
158 | Double_t xd[3],xm[3]; | |
159 | dhelix1.Evaluate(phase[1][0],xd); | |
160 | mhelix.Evaluate(phase[1][1], xm); | |
161 | fXr[0] = 0.5*(xd[0]+xm[0]); | |
162 | fXr[1] = 0.5*(xd[1]+xm[1]); | |
163 | fXr[2] = 0.5*(xd[2]+xm[2]); | |
164 | // | |
165 | dhelix1.GetMomentum(phase[1][0], fPdr); | |
166 | mhelix.GetMomentum(phase[1][1], fPm); | |
167 | dhelix1.GetAngle(phase[1][0],mhelix,phase[1][1],fAngle); | |
168 | // fRr = TMath::Sqrt(radius[1]); | |
169 | fRr = TMath::Sqrt(fXr[0]*fXr[0]+fXr[1]*fXr[1]); | |
170 | } | |
171 | fDist1 = TMath::Sqrt(TMath::Min(d1,d2)); | |
172 | fDist2 = TMath::Sqrt(distance2); | |
173 | // | |
174 | // | |
175 | ||
176 | } | |
177 | ||
178 | ||
179 | Float_t AliESDkink::GetTPCDensityFactor() const | |
180 | { | |
181 | // | |
182 | // | |
183 | 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)); | |
184 | } | |
185 | ||
186 | Float_t AliESDkink::GetQt() const | |
187 | { | |
188 | Float_t dmomentum = TMath::Sqrt(fPdr[0]*fPdr[0]+fPdr[1]*fPdr[1]+fPdr[2]*fPdr[2]); | |
189 | return TMath::Sin(fAngle[2])*dmomentum; | |
190 | } |