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6fc428f0 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
17///////////////////////////////////////////////////////////////////////////////
18// //
19// //
20// Comparison class for V0 information //
21// responsible:
22// marian.ivanov@cern.ch //
23//
24//
25
26
27
28
29
30#include <stdio.h>
31#include <string.h>
32//ROOT includes
33#include "Rtypes.h"
34//
35//ALIROOT includes
36//
37#include "AliESDtrack.h"
38#include "AliTPCParam.h"
39#include "AliTrackReference.h"
40#include "AliTPCParamSR.h"
41#include "AliESD.h"
42#include "AliESDfriend.h"
43#include "AliESDtrack.h"
44#include "AliTPCseed.h"
45#include "AliITStrackMI.h"
46#include "AliTRDtrack.h"
47#include "AliHelix.h"
48#include "AliESDVertex.h"
49#include "AliExternalTrackParam.h"
50#include "AliESDkink.h"
51#include "AliESDv0.h"
52#include "AliV0.h"
f16481f0 53#include "AliKFParticle.h"
54#include "AliKFVertex.h"
6fc428f0 55//
56#include "AliTreeDraw.h"
76472f75 57#include "AliMCInfo.h"
58#include "AliGenKinkInfo.h"
59#include "AliGenV0Info.h"
60
6fc428f0 61
62#include "AliESDRecV0Info.h"
63
64
65
66ClassImp(AliESDRecV0Info)
67
68
cd875161 69AliESDRecV0Info:: AliESDRecV0Info():
70 TObject(),
f16481f0 71 fT1(), //track1
72 fT2(), //track2
73 fDist1(0), //info about closest distance according closest MC - linear DCA
74 fDist2(0), //info about closest distance parabolic DCA
75 fInvMass(0), //reconstructed invariant mass -
cd875161 76 //
f16481f0 77 fDistMinR(0), // distance at minimal radius
78 fRr(0), // rec position of the vertex
79 fPointAngleFi(0), //point angle fi
80 fPointAngleTh(0), //point angle theta
81 fPointAngle(0), //point angle full
82 fV0Status(0), // status of the kink
cd875161 83 fV0tpc(0), // Vo information from reconsturction according TPC
84 fV0its(0), // Vo information from reconsturction according ITS
85 fV0rec(0), // V0 information form the reconstruction
f16481f0 86 fV0recOff(0), // V0 information form the reconstruction - OFFLINE
87 fMultiple(0), // how man times V0 was recostructed
88 fRecStatus(0), // status form the reconstuction
89 fV0MultipleOn(0), // how man times was V0 reconstucted
90 fV0MultipleOff(0), // how man times was V0 reconstucted
91 //
92 fKFrecChi2NC(0), // ONLINE V0 finder non constrained chi2
93 fKFrecChi2C(0), // ONLINE V0 finder constrained chi2 - prim vertex
94 fKFrecChi2CM(0), // ONLINE V0 finder constrained chi2 - prim vertex+mass
95 fKFRecNC(0), // non constrained
96 fKFRecC(0), // constrained vertex
97 fKFRecCM(0), // constrained vertex+mass
98 fKFrecOffChi2NC(0), // OFFLINE V0 finder - non constrained chi2
99 fKFrecOffChi2C(0), // OFFLINE V0 finder - constrained chi2 - prim vertex
100 fKFrecOffChi2CM(0), // OFFLINE V0 finder - constrained chi2 - prim vertex+mass
101 fKFOffRecNC(0), // non constrained
102 fKFOffRecC(0), // constrained vertex
103 fKFOffRecCM(0) // constrained vertex+mass
cd875161 104{
105 //
106 // default constructor
107 //
f16481f0 108 fV0tpc = new AliV0();
109 fV0its = new AliV0();
110 fV0rec = new AliV0();
111 fV0recOff = new AliV0();
cd875161 112}
6fc428f0 113
114
115void AliESDRecV0Info::Update(Float_t vertex[3])
116{
117
118 if ( (fT1.fStatus[1]>0)&& (fT2.fStatus[1]>0)){
119 Float_t distance1,distance2;
120 Double_t xx[3],pp[3];
121 //
122 Double_t xd[3],pd[3],signd;
123 Double_t xm[3],pm[3],signm;
124 //
125 //
126 if (fT1.fITSOn&&fT2.fITSOn){
127 for (Int_t i=0;i<3;i++){
128 xd[i] = fT2.fITSinR1[i];
129 pd[i] = fT2.fITSinP1[i];
130 xm[i] = fT1.fITSinR1[i];
131 pm[i] = fT1.fITSinP1[i];
132 }
133 }
134 else{
135
136 for (Int_t i=0;i<3;i++){
137 xd[i] = fT2.fTPCinR1[i];
138 pd[i] = fT2.fTPCinP1[i];
139 xm[i] = fT1.fTPCinR1[i];
140 pm[i] = fT1.fTPCinP1[i];
141 }
142 }
143 //
144 //
145 signd = fT2.fSign<0 ? -1:1;
146 signm = fT1.fSign<0 ? -1:1;
147
148 AliHelix dhelix1(xd,pd,signd);
149 dhelix1.GetMomentum(0,pp,0);
150 dhelix1.Evaluate(0,xx);
151 //
152 // Double_t x2[3],p2[3];
153 //
154 AliHelix mhelix(xm,pm,signm);
155 //
156 //find intersection linear
157 //
158 Double_t phase[2][2],radius[2];
159 Int_t points = dhelix1.GetRPHIintersections(mhelix, phase, radius,200);
160 Double_t delta1=10000,delta2=10000;
161
162 if (points==1){
163 fRs[0] = TMath::Sqrt(radius[0]);
164 fRs[1] = TMath::Sqrt(radius[0]);
165 }
166 if (points==2){
167 fRs[0] =TMath::Min(TMath::Sqrt(radius[0]),TMath::Sqrt(radius[1]));
168 fRs[1] =TMath::Max(TMath::Sqrt(radius[0]),TMath::Sqrt(radius[1]));
169 }
170
171 if (points>0){
172 dhelix1.LinearDCA(mhelix,phase[0][0],phase[0][1],radius[0],delta1);
173 dhelix1.LinearDCA(mhelix,phase[0][0],phase[0][1],radius[0],delta1);
174 dhelix1.LinearDCA(mhelix,phase[0][0],phase[0][1],radius[0],delta1);
175 }
176 if (points==2){
177 dhelix1.LinearDCA(mhelix,phase[1][0],phase[1][1],radius[1],delta2);
178 dhelix1.LinearDCA(mhelix,phase[1][0],phase[1][1],radius[1],delta2);
179 dhelix1.LinearDCA(mhelix,phase[1][0],phase[1][1],radius[1],delta2);
180 }
181 if (points==1){
182 fRs[0] = TMath::Sqrt(radius[0]);
183 fRs[1] = TMath::Sqrt(radius[0]);
184 fDistMinR = delta1;
185 }
186 if (points==2){
187 if (radius[0]<radius[1]){
188 fRs[0] = TMath::Sqrt(radius[0]);
189 fRs[1] = TMath::Sqrt(radius[1]);
190 fDistMinR = delta1;
191 }
192 else{
193 fRs[0] = TMath::Sqrt(radius[1]);
194 fRs[1] = TMath::Sqrt(radius[0]);
195 fDistMinR = delta2;
196 }
197 }
198 //
199 //
200 distance1 = TMath::Min(delta1,delta2);
201 //
202 //find intersection parabolic
203 //
204 points = dhelix1.GetRPHIintersections(mhelix, phase, radius);
205 delta1=10000,delta2=10000;
206
207 if (points>0){
208 dhelix1.ParabolicDCA(mhelix,phase[0][0],phase[0][1],radius[0],delta1);
209 }
210 if (points==2){
211 dhelix1.ParabolicDCA(mhelix,phase[1][0],phase[1][1],radius[1],delta2);
212 }
213
214 distance2 = TMath::Min(delta1,delta2);
215 if (distance2>100) fDist2 =100;
216 return;
217 if (delta1<delta2){
218 //get V0 info
219 dhelix1.Evaluate(phase[0][0],fXr);
220 dhelix1.GetMomentum(phase[0][0],fPdr);
221 mhelix.GetMomentum(phase[0][1],fPm);
222 dhelix1.GetAngle(phase[0][0],mhelix,phase[0][1],fAngle);
223 fRr = TMath::Sqrt(radius[0]);
224 }
225 else{
226 dhelix1.Evaluate(phase[1][0],fXr);
227 dhelix1.GetMomentum(phase[1][0], fPdr);
228 mhelix.GetMomentum(phase[1][1], fPm);
229 dhelix1.GetAngle(phase[1][0],mhelix,phase[1][1],fAngle);
230 fRr = TMath::Sqrt(radius[1]);
231 }
232 fDist1 = TMath::Sqrt(distance1);
233 fDist2 = TMath::Sqrt(distance2);
234
235 if (fDist2<10.5){
236 Double_t x,alpha,param[5],cov[15];
237 //
238 fT1.GetESDtrack()->GetInnerExternalParameters(alpha,x,param);
239 fT1.GetESDtrack()->GetInnerExternalCovariance(cov);
240 AliExternalTrackParam paramm(x,alpha,param,cov);
241 //
242 fT2.GetESDtrack()->GetInnerExternalParameters(alpha,x,param);
243 fT2.GetESDtrack()->GetInnerExternalCovariance(cov);
244 AliExternalTrackParam paramd(x,alpha,param,cov);
245 }
246 //
247 //
248
249 Float_t v[3] = {fXr[0]-vertex[0],fXr[1]-vertex[1],fXr[2]-vertex[2]};
250 Float_t p[3] = {fPdr[0]+fPm[0], fPdr[1]+fPm[1],fPdr[2]+fPm[2]};
251
252 Float_t vnorm2 = v[0]*v[0]+v[1]*v[1];
253 Float_t vnorm3 = TMath::Sqrt(v[2]*v[2]+vnorm2);
254 vnorm2 = TMath::Sqrt(vnorm2);
255 Float_t pnorm2 = p[0]*p[0]+p[1]*p[1];
256 Float_t pnorm3 = TMath::Sqrt(p[2]*p[2]+pnorm2);
257 pnorm2 = TMath::Sqrt(pnorm2);
258
259 fPointAngleFi = (v[0]*p[0]+v[1]*p[1])/(vnorm2*pnorm2);
260 fPointAngleTh = (v[2]*p[2]+vnorm2*pnorm2)/(vnorm3*pnorm3);
261 fPointAngle = (v[0]*p[0]+v[1]*p[1]+v[2]*p[2])/(vnorm3*pnorm3);
262 }
263}
264
34737198 265void AliESDRecV0Info::Reset(){
266 //
267 // Reset status and all counters
268 //
269 fDist1=-1; //info about closest distance according closest MC - linear DCA
270 fDist2=-1; //info about closest distance parabolic DCA
271 fInvMass=-1; //reconstructed invariant mass -
272 //
273 fDistMinR=-1; // distance at minimal radius
274 fRr=-1; // rec position of the vertex
275 fLab[0]=-20; //MC label of the partecle
276 fLab[1]=-10; //MC label of the partecle
277 fPointAngleFi=0; //point angle fi
278 fPointAngleTh=0; //point angle theta
279 fPointAngle=0; //point angle full
280 //
281 fV0Status= -100; // status of the V0
282 fMultiple=0; // how man times V0 was recostructed
283 fRecStatus=0; // status form the reconstuction - 1 reconstructed - -1 fake
284 fV0MultipleOn=0; // how man times was V0 reconstucted - onfly
285 fV0MultipleOff=0; // how man times was V0 reconstucted - offline
286 //
287 // AliKF variables - variables to make a selection + resoluton study
288 //
289 fKFrecChi2NC=0; // ONLINE V0 finder non constrained chi2
290 fKFrecChi2C=0; // ONLINE V0 finder constrained chi2 - prim vertex
291 fKFrecChi2CM=0; // ONLINE V0 finder constrained chi2 - prim vertex+mass
292 //
293 fKFrecOffChi2NC=0; // OFFLINE V0 finder - non constrained chi2
294 fKFrecOffChi2C=0; // OFFLINE V0 finder - constrained chi2 - prim vertex
295 fKFrecOffChi2CM=0; // OFFLINE V0 finder - constrained chi2 - prim vertex+mass
296}
297
298
299
f16481f0 300void AliESDRecV0Info::UpdateKF(const AliESDVertex &vertex, Int_t pdg0, Int_t pdg1, Float_t mass){
301 //
302 // Calculate properties of V0 vertex using different type of constraints
303 //
304 fKFrecChi2NC=0; // ONLINE V0 finder non constrained chi2
305 fKFrecChi2C=0; // ONLINE V0 finder constrained chi2 - prim vertex
306 fKFrecChi2CM=0; // ONLINE V0 finder constrained chi2 - prim vertex+mass
307 if (fKFRecNC) {delete fKFRecNC; fKFRecNC=0;}
308 if (fKFRecC) {delete fKFRecC; fKFRecC=0;}
309 if (fKFRecCM) {delete fKFRecCM; fKFRecCM=0;}
310 //
311 fKFrecOffChi2NC=0; // OFFLINE V0 finder - non constrained chi2
312 fKFrecOffChi2C=0; // OFFLINE V0 finder - constrained chi2 - prim vertex
313 fKFrecOffChi2CM=0; // OFFLINE V0 finder - constrained chi2 - prim vertex+mass
314 if (fKFOffRecNC) {delete fKFOffRecNC; fKFOffRecNC=0;}
315 if (fKFOffRecC) {delete fKFOffRecC; fKFOffRecC=0;}
316 if (fKFOffRecCM) {delete fKFOffRecCM; fKFOffRecCM=0;}
317 if (fV0Status==0) return; //
318 //
319 AliKFVertex primVtx(vertex);
320 //
321 if (fV0rec &&
322 TMath::Abs(fV0rec->GetParamN()->GetSigmaY2())>0.000000001&&
323 TMath::Abs(fV0rec->GetParamP()->GetSigmaY2())>0.000000001
324 ){
325 //
326 Double_t x, y, z;
327 AliKFParticle p1( *(fV0rec->GetParamN()), pdg0 );
328 AliKFParticle p2( *(fV0rec->GetParamP()), pdg1 );
329 //
330 fKFRecNC = new AliKFParticle;
331 fV0rec->GetXYZ(x,y,z);
332 fKFRecNC->SetVtxGuess(x,y,z);
333 *(fKFRecNC)+=p1;
334 *(fKFRecNC)+=p2;
335 fKFrecChi2NC =fKFRecNC->GetChi2() ;
336 //
337 fKFRecC = new AliKFParticle;
338 fV0rec->GetXYZ(x,y,z);
339 fKFRecC->SetVtxGuess(x,y,z);
340 *(fKFRecC)+=p1;
341 *(fKFRecC)+=p2;
342 fKFRecC->SetProductionVertex(primVtx);
343 fKFrecChi2C =fKFRecC->GetChi2();
344 //
345 fKFRecCM = new AliKFParticle;
346 fV0rec->GetXYZ(x,y,z);
347 fKFRecCM->SetVtxGuess(x,y,z);
348 *(fKFRecCM)+=p1;
349 *(fKFRecCM)+=p2;
350 fKFRecCM->SetProductionVertex(primVtx);
351 fKFRecCM->SetMassConstraint(mass);
352 fKFrecChi2CM =fKFRecCM->GetChi2();
353 }
354
355 if (fV0recOff &&
356 TMath::Abs(fV0recOff->GetParamN()->GetSigmaY2())>0.000000001&&
357 TMath::Abs(fV0recOff->GetParamP()->GetSigmaY2())>0.000000001
358 ){
359 //
360 Double_t x, y, z;
361 AliKFParticle p1( *(fV0recOff->GetParamN()), pdg0 );
362 AliKFParticle p2( *(fV0recOff->GetParamP()), pdg1 );
363 //
364 fKFOffRecNC = new AliKFParticle;
365 fV0recOff->GetXYZ(x,y,z);
366 fKFOffRecNC->SetVtxGuess(x,y,z);
367 *(fKFOffRecNC)+=p1;
368 *(fKFOffRecNC)+=p2;
369 fKFrecOffChi2NC =fKFOffRecNC->GetChi2() ;
370 //
371 fKFOffRecC = new AliKFParticle;
372 fV0recOff->GetXYZ(x,y,z);
373 fKFOffRecC->SetVtxGuess(x,y,z);
374 *(fKFOffRecC)+=p1;
375 *(fKFOffRecC)+=p2;
376 fKFOffRecC->SetProductionVertex(primVtx);
377 fKFrecOffChi2C =fKFOffRecC->GetChi2();
378 //
379 fKFOffRecCM = new AliKFParticle;
380 fV0recOff->GetXYZ(x,y,z);
381 fKFOffRecCM->SetVtxGuess(x,y,z);
382 *(fKFOffRecCM)+=p1;
383 *(fKFOffRecCM)+=p2;
384 fKFOffRecCM->SetProductionVertex(primVtx);
385 fKFOffRecCM->SetMassConstraint(mass);
386 fKFrecOffChi2CM =fKFOffRecCM->GetChi2();
387 }
388
389
390}
391
392