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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 | // | |
7c97ee80 | 35 | fDist1 =-1; |
36 | fDist2 =-1; | |
37 | fRr =-1; | |
38 | for (Int_t i=0;i<12;i++) fStatus[i]=0; | |
9035eb72 | 39 | fRow0 =-1; |
7c97ee80 | 40 | for (Int_t i=0;i<2;i++) |
41 | for (Int_t j=0;j<2;j++){ | |
42 | fTPCdensity[i][j]=-1; | |
43 | fTPCdensity2[i][j]=-1; | |
44 | } | |
45 | fTPCncls[0]=0; | |
46 | fTPCncls[1]=0; | |
51ad6848 | 47 | } |
48 | ||
49 | void AliESDkink::SetMother(const AliExternalTrackParam & pmother) { | |
50 | // | |
51 | // set mother | |
52 | // | |
53 | fParamMother = pmother; | |
54 | } | |
55 | ||
56 | void AliESDkink::SetDaughter(const AliExternalTrackParam & pdaughter){ | |
57 | // | |
58 | //set daughter | |
59 | // | |
60 | fParamDaughter = pdaughter; | |
61 | ||
62 | } | |
63 | ||
64 | void AliESDkink::Update() | |
65 | { | |
66 | // | |
67 | // updates Kink Info | |
68 | // | |
7c97ee80 | 69 | Float_t distance2=1000; |
51ad6848 | 70 | // |
71 | AliHelix dhelix1(fParamDaughter); | |
72 | AliHelix mhelix(fParamMother); | |
73 | // | |
74 | //find intersection linear | |
75 | // | |
76 | Double_t phase[2][2],radius[2]; | |
51ad6848 | 77 | Double_t delta1=10000,delta2=10000; |
7c97ee80 | 78 | Int_t points=0; |
79 | /* | |
80 | Float_t distance1=0; | |
81 | Int_t points = dhelix1.GetRPHIintersections(mhelix, phase, radius,200); | |
51ad6848 | 82 | |
83 | if (points>0){ | |
84 | dhelix1.LinearDCA(mhelix,phase[0][0],phase[0][1],radius[0],delta1); | |
51ad6848 | 85 | } |
86 | if (points==2){ | |
87 | dhelix1.LinearDCA(mhelix,phase[1][0],phase[1][1],radius[1],delta2); | |
51ad6848 | 88 | } |
89 | distance1 = TMath::Min(delta1,delta2); | |
7c97ee80 | 90 | */ |
51ad6848 | 91 | // |
92 | //find intersection parabolic | |
93 | // | |
7c97ee80 | 94 | points = dhelix1.GetRPHIintersections(mhelix, phase, radius,7); |
95 | ||
51ad6848 | 96 | delta1=10000,delta2=10000; |
97 | Double_t d1=1000.,d2=10000.; | |
98 | if (points>0){ | |
7c97ee80 | 99 | dhelix1.ParabolicDCA(mhelix,phase[0][0],phase[0][1],radius[0],delta1,6); |
100 | // dhelix1.ParabolicDCA(mhelix,phase[0][0],phase[0][1],radius[0],delta1); | |
51ad6848 | 101 | Double_t xd[3],xm[3]; |
102 | dhelix1.Evaluate(phase[0][0],xd); | |
103 | mhelix.Evaluate(phase[0][1],xm); | |
104 | 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]); | |
105 | } | |
106 | if (points==2){ | |
7c97ee80 | 107 | dhelix1.ParabolicDCA(mhelix,phase[1][0],phase[1][1],radius[1],delta2,6); |
108 | //dhelix1.ParabolicDCA(mhelix,phase[1][0],phase[1][1],radius[1],delta2); | |
51ad6848 | 109 | Double_t xd[3],xm[3]; |
110 | dhelix1.Evaluate(phase[1][0],xd); | |
111 | mhelix.Evaluate(phase[1][1],xm); | |
112 | 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]); | |
113 | } | |
114 | // | |
115 | distance2 = TMath::Min(delta1,delta2); | |
116 | if (delta1<delta2){ | |
117 | //get V0 info | |
118 | // dhelix1.Evaluate(phase[0][0],fXr); | |
119 | Double_t xd[3],xm[3]; | |
120 | dhelix1.Evaluate(phase[0][0],xd); | |
121 | mhelix.Evaluate(phase[0][1], xm); | |
122 | fXr[0] = 0.5*(xd[0]+xm[0]); | |
123 | fXr[1] = 0.5*(xd[1]+xm[1]); | |
124 | fXr[2] = 0.5*(xd[2]+xm[2]); | |
125 | // | |
126 | dhelix1.GetMomentum(phase[0][0],fPdr); | |
127 | mhelix.GetMomentum(phase[0][1],fPm); | |
128 | dhelix1.GetAngle(phase[0][0],mhelix,phase[0][1],fAngle); | |
129 | //fRr = TMath::Sqrt(radius[0]); | |
130 | fRr = TMath::Sqrt(fXr[0]*fXr[0]+fXr[1]*fXr[1]); | |
131 | } | |
132 | else{ | |
133 | //dhelix1.Evaluate(phase[1][0],fXr); | |
134 | Double_t xd[3],xm[3]; | |
135 | dhelix1.Evaluate(phase[1][0],xd); | |
136 | mhelix.Evaluate(phase[1][1], xm); | |
137 | fXr[0] = 0.5*(xd[0]+xm[0]); | |
138 | fXr[1] = 0.5*(xd[1]+xm[1]); | |
139 | fXr[2] = 0.5*(xd[2]+xm[2]); | |
140 | // | |
141 | dhelix1.GetMomentum(phase[1][0], fPdr); | |
142 | mhelix.GetMomentum(phase[1][1], fPm); | |
143 | dhelix1.GetAngle(phase[1][0],mhelix,phase[1][1],fAngle); | |
144 | // fRr = TMath::Sqrt(radius[1]); | |
145 | fRr = TMath::Sqrt(fXr[0]*fXr[0]+fXr[1]*fXr[1]); | |
146 | } | |
147 | fDist1 = TMath::Sqrt(TMath::Min(d1,d2)); | |
148 | fDist2 = TMath::Sqrt(distance2); | |
149 | // | |
150 | // | |
151 | ||
152 | } | |
153 | ||
154 | ||
155 | Float_t AliESDkink::GetTPCDensityFactor() const | |
156 | { | |
157 | // | |
158 | // | |
159 | 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)); | |
160 | } | |
161 | ||
162 | Float_t AliESDkink::GetQt() const | |
163 | { | |
164 | Float_t dmomentum = TMath::Sqrt(fPdr[0]*fPdr[0]+fPdr[1]*fPdr[1]+fPdr[2]*fPdr[2]); | |
165 | return TMath::Sin(fAngle[2])*dmomentum; | |
166 | } |