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aecdf013 1// ITS Track Class
2//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
3// It contain all the usefull information for the track and the method to calculate, modify or extract them
4// The track is mainly caracterized by the state vector of elements (fX0, fX1, fX2, fX3, fX4) and the
5// corresponding covariance matrix of elements (C00, C10, ..... C44) that is triangular
6//
7#include <iostream.h>
8#include <TMath.h>
9#include <TVector.h>
10#include <TObjArray.h>
11#include "AliRun.h"
12#include "AliITSRad.h"
13#include "AliITSTrackV1.h"
14#include "AliGenerator.h"
a3894645 15#include "AliMagF.h"
aecdf013 16
17
18ClassImp(AliITSTrackV1)
19
20AliITSTrackV1::AliITSTrackV1() {
21//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
22// default constructor
23
24 fC00=fC10=fC11=fC20=fC21=fC22=fC30=fC31=fC32=fC33=fC40=fC41=fC42=fC43=fC44=0.;
25 flistCluster = new TObjArray;
26 fNumClustInTrack =0;
27 fChi2=-1;
28 flabel =0;
29 fVertex.ResizeTo(3);
30 fErrorVertex.ResizeTo(3);
31 fLayer = -1;
32 fClusterInTrack = new TMatrix(6,9);
33 Int_t i;
34 for(i=0; i<6; i++) (*fClusterInTrack)(i,6)=(*fClusterInTrack)(i,7)=
35 (*fClusterInTrack)(i,8)=-1.;
70a9314b 36 frtrack=0.;
37 fnoclust=0;
aecdf013 38 fd2.ResizeTo(6);
39 ftgl2.ResizeTo(6);
a3894645 40 fdtgl.ResizeTo(6);
41
42//////////////////////////////////////// gets magnetic field factor ////////////////////////////////
43
44 AliMagF * fieldPointer = gAlice->Field();
45 fFieldFactor = (Double_t)fieldPointer->Factor();
46 //cout<< " field factor = "<<fFieldFactor<<"\n"; getchar();
47
48/////////////////////////////////////////////////////////////////////////////////////////////////////////
49
aecdf013 50}
51
52
53
54AliITSTrackV1::AliITSTrackV1(const AliITSTrackV1 &cobj) {
55//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
56// copy constructor
57
58 fClusterInTrack = new TMatrix(6,9);
59 Int_t i;
60 for(i=0; i<6; i++) (*fClusterInTrack)(i,6)=(*fClusterInTrack)(i,7)=
61 (*fClusterInTrack)(i,8)=-1.;
62 flistCluster = new TObjArray;
63 fVertex.ResizeTo(3);
64 fErrorVertex.ResizeTo(3);
65 fVertex = cobj.fVertex;
66 fErrorVertex = cobj.fErrorVertex;
67 flabel = cobj.flabel;
68 fLayer=cobj.fLayer;
69 fTPCtrack = cobj.fTPCtrack;
70 fNumClustInTrack = cobj.fNumClustInTrack;
71 fChi2= cobj.fChi2;
72 fX0=cobj.fX0; fX1=cobj.fX1; fX2=cobj.fX2; fX3=cobj.fX3; fX4=cobj.fX4;
73 frtrack=cobj.frtrack;
74 fDv=cobj.fDv;
75 fZv=cobj.fZv;
76 fsigmaDv=cobj.fsigmaDv;
77 fsigmaZv=cobj.fsigmaZv;
78 fd2.ResizeTo(6);
79 ftgl2.ResizeTo(6);
80 fdtgl.ResizeTo(6);
81 fd2=cobj.fd2;
82 ftgl2=cobj.ftgl2;
83 fdtgl=cobj.fdtgl;
70a9314b 84 fnoclust=cobj.fnoclust;
aecdf013 85
86 fC00=cobj.fC00; fC10=cobj.fC10; fC11=cobj.fC11; fC20=cobj.fC20; fC21=cobj.fC21;
87 fC22=cobj.fC22; fC30=cobj.fC30; fC31=cobj.fC31; fC32=cobj.fC32; fC33=cobj.fC33;
88 fC40=cobj.fC40; fC41=cobj.fC41; fC42=cobj.fC42; fC43=cobj.fC43; fC44=cobj.fC44;
89
90 *fClusterInTrack = *cobj.fClusterInTrack;
a3894645 91
92 fFieldFactor=cobj.fFieldFactor;
aecdf013 93
94 for(i=0; i<cobj.flistCluster->GetSize(); i++)
95 flistCluster->AddLast(cobj.flistCluster->At(i));
96
97}
98
99AliITSTrackV1::AliITSTrackV1(AliTPCtrack &obj)
100{
101//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
102// special constructor to convert a TPC track into an ITS track
103
a3894645 104//////////////////////////////////////// gets magnetic field factor ////////////////////////////////
105
106 AliMagF * fieldPointer = gAlice->Field();
107 fFieldFactor = (Double_t)fieldPointer->Factor();
108 //cout<< " field factor = "<<fFieldFactor<<"\n"; getchar();
109
110/////////////////////////////////////////////////////////////////////////////////////////////////////////
111
112
aecdf013 113 fTPCtrack = &obj;
114 fVertex.ResizeTo(3);
115 fErrorVertex.ResizeTo(3);
116
117 fd2.ResizeTo(6);
118 ftgl2.ResizeTo(6);
119 fdtgl.ResizeTo(6);
120 AliGenerator *gener = gAlice->Generator();
121 Float_t vxg,vyg,vzg;
122 gener->GetOrigin(vxg,vyg,vzg);
123
124
125 fVertex(0)=(Double_t)vxg;
126 fVertex(1)=(Double_t)vyg;
127 fVertex(2)=(Double_t)vzg;
128
129 fLayer = 7;
130 //fmCovariance = new TMatrix(5,5);
131 fClusterInTrack = new TMatrix(6,9);
132
133 Int_t i;
134 for(i=0; i<6; i++) (*fClusterInTrack)(i,6)=(*fClusterInTrack)(i,7)=
135 (*fClusterInTrack)(i,8)=-1.;
136 flistCluster = new TObjArray;
70a9314b 137 fNumClustInTrack = 0;
138 fnoclust=0;
aecdf013 139 LmTPC();
140
141}
142
143
144AliITSTrackV1::~AliITSTrackV1() {
145//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
146//destructor
147
148 if(flistCluster) delete flistCluster;
149 if(fClusterInTrack) delete fClusterInTrack;
150
151}
152
153void AliITSTrackV1::PutCElements(Double_t C00, Double_t C10, Double_t C11, Double_t C20, Double_t C21,
154Double_t C22, Double_t C30, Double_t C31, Double_t C32, Double_t C33, Double_t C40,
155Double_t C41, Double_t C42, Double_t C43, Double_t C44){
156//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
157// puts elements of covariance matrix
158
159 fC00=C00; fC10=C10; fC11=C11; fC20=C20; fC21=C21; fC22=C22; fC30=C30; fC31=C31; fC32=C32; fC33=C33;
160 fC40=C40; fC41=C41; fC42=C42; fC43=C43; fC44=C44;
161}
162
163void AliITSTrackV1::GetCElements(Double_t &C00, Double_t &C10, Double_t &C11, Double_t &C20, Double_t &C21,
164Double_t &C22, Double_t &C30, Double_t &C31, Double_t &C32, Double_t &C33, Double_t &C40,
165Double_t &C41, Double_t &C42, Double_t &C43, Double_t &C44) const {
166//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
167// gets elements of covariance matrix
168
169
170 C00=fC00; C10=fC10; C11=fC11; C20=fC20; C21=fC21; C22=fC22; C30=fC30; C31=fC31; C32=fC32; C33=fC33;
171 C40=fC40; C41=fC41; C42=fC42; C43=fC43; C44=fC44;
172
173}
174
175void AliITSTrackV1::GetXElements(Double_t &X0, Double_t &X1, Double_t &X2, Double_t &X3, Double_t &X4) const {
176//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
177// gets the elements of the state vector
178 X0=fX0; X1=fX1; X2=fX2; X3=fX3; X4=fX4;
179}
180
181void AliITSTrackV1::PutXElements(Double_t X0, Double_t X1, Double_t X2, Double_t X3, Double_t X4){
182//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
183// puts the elements of the state vector
184 fX0=X0; fX1=X1; fX2=X2; fX3=X3; fX4=X4;
185}
186
187void AliITSTrackV1::LmTPC() {
188//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
189// Transform the TPC state vector from TPC-local to master and build a new state vector ITS-type
190// The covariance matrix is also modified accordingly
191
192
193 Double_t alpha = fTPCtrack->GetAlpha();
194
195 //printf("LmTPC: alpha %f\n",alpha);
196
197 Double_t yTPC = fTPCtrack->GetY();
198 Double_t zTPC = fTPCtrack->GetZ();
199 Double_t cTPC = fTPCtrack->GetC();
200 Double_t etaTPC = fTPCtrack->GetEta();
201 Double_t tglTPC = fTPCtrack->GetTgl();
202
203
204 Double_t xm, ym, zm;
205 Double_t sina = TMath::Sin(alpha);
206 Double_t cosa = TMath::Cos(alpha);
207 Double_t xl= fTPCtrack->GetX();
208 xm = xl * cosa - yTPC*sina;
209 ym = xl * sina + yTPC*cosa;
210 zm = zTPC;
211 //cout<<" xl e alpha = "<<xl<<" "<<alpha<<"\n"; getchar();
212
213 Double_t x0m,y0m;
214
215 ///////////////////////////////////// determine yo //////////////////////////////////////////////////
216
217 Double_t vxl=fVertex(0)*cosa+fVertex(1)*sina;
218 Double_t vyl= -fVertex(0)*sina+fVertex(1)*cosa;
219 Double_t xo,yo, signy;
220 Double_t r = 1./cTPC;
221 xo = etaTPC / cTPC;
70a9314b 222 //fxoTPC=xo;
aecdf013 223 Double_t yo1, yo2, diffsq1, diffsq2;
224 yo1 = yTPC + TMath::Sqrt(r*r - (xl-xo)*(xl-xo));
225 yo2 = yTPC - TMath::Sqrt(r*r - (xl-xo)*(xl-xo));
226 diffsq1=TMath::Abs((yo1-vyl)*(yo1-vyl)+(xo-vxl)*(xo-vxl)-r*r);
227 diffsq2=TMath::Abs((yo2-vyl)*(yo2- vyl)+(xo-vxl)*(xo-vxl)-r*r);
228 if(diffsq1<diffsq2) {yo=yo1; signy=1.;} else {yo=yo2; signy=-1.;};
229
230 ////////////////////////////////////////////////////////////////////////////////////////////////////
231
232 x0m = xo * cosa - yo * sina;
233 y0m = xo * sina + yo * cosa;
234
235 frtrack=TMath::Sqrt(xm*xm+ym*ym);
70a9314b 236 /*
aecdf013 237 Double_t pigre=TMath::Pi();
238 Double_t phi=0.0;
239 if(ym == 0. || xm == 0.) {
240 if(ym == 0. && xm == 0.) {cout << " Error in AliITSTrackV1::LmTPC x=0 and y=0 \n"; getchar();}
241 if(ym ==0. && xm>0.) phi=0.;
242 if(ym==0. && xm<0.) phi=pigre;
243 if(xm==0 && ym>0.) phi=pigre/2.;
244 if(xm==0 && ym<0.) phi=1.5*pigre;
245 }
246 else {
247 if (xm>0. && ym>0.) phi=TMath::ATan(ym/xm);
248 if (xm<0. && ym>0.) phi=pigre+TMath::ATan(ym/xm);
249 if (xm<0. && ym<0.) phi=pigre+TMath::ATan(ym/xm);
250 if (xm>0. && ym<0.) phi=(2*pigre)+TMath::ATan(ym/xm);
251 };
70a9314b 252 if(phi<0. || phi>(2*pigre)) {cout<<"attention error on phi in AliITSTrackV1:LmTPC \n"; getchar();}
253 */
254
255 Double_t phi=TMath::ATan2(ym,xm); if(phi<0) phi=2.*TMath::Pi()+phi; //nuova def phi
aecdf013 256
257 fX0=phi;
258 fX1=zm;
259 fX3=tglTPC;
260 fX4=cTPC;
261
262
263 Double_t dd=TMath::Sqrt((x0m-fVertex(0))*(x0m-fVertex(0))+(y0m-fVertex(1))*(y0m-fVertex(1)));
264 Double_t signdd;
265 if (r>0) signdd=1.; else signdd=-1.;
266 fX2=signdd*dd-r;
267 //cout<<" fvertex = "<<fVertex(0)<<" "<<fVertex(1)<<" "<<fVertex(2)<<"\n";
268
269 Double_t cov[15];
270 fTPCtrack->GetCovariance(cov);
271
272 Double_t dfidy, dDdy, dDdC, dDdeta;
273
274 dfidy=(xm*cosa+ym*sina)/(frtrack*frtrack);
275 dDdy=signdd*((y0m-fVertex(1))*cosa-(x0m-fVertex(0))*sina)/dd;
276 Double_t dyodr=signy*(r+(xl-xo)*etaTPC)/TMath::Sqrt(r*r-(xl-xo)*(xl-xo));
277 Double_t dyomdr=sina*etaTPC+cosa*dyodr;
278 Double_t dxomdr=cosa*etaTPC-sina*dyodr;
279 Double_t ddddR=((x0m-fVertex(0))*dxomdr+(y0m-fVertex(1))*dyomdr)/dd;
280 dDdC=-r*r*(signdd*ddddR-1.);
281 Double_t dyoldxol=signy*(xl-xo)/TMath::Sqrt(r*r-(xl-xo)*(xl-xo));
282 Double_t dxomdeta=r*(cosa-sina*dyoldxol);
283 Double_t dyomdeta=r*(sina+cosa*dyoldxol);
284 dDdeta=signdd*((x0m-fVertex(0))*dxomdeta+(y0m-fVertex(1))*dyomdeta)/dd;
285
286 Double_t f00=dfidy;
287 Double_t f20=dDdy;
288 Double_t f22=dDdC;
289 Double_t f23=dDdeta;
290
291 Double_t t00=cov[0]*f00;
292 Double_t t02=cov[0]*f20+cov[6]*f22+cov[3]*f23;
293 Double_t t20=cov[6]*f00;
294 Double_t t22=cov[6]*f20+cov[9]*f22+cov[8]*f23;
295
296 fC00=f00*t00;
297 fC10=cov[1]*f00;
298 fC11=cov[2];
299 fC20=f20*t00+f22*t20+f23*cov[3]*f00;
300 fC21=f20*cov[1]+f22*cov[7]+f23*cov[4];
301 fC22=f20*t02+f22*t22+f23*(cov[3]*f20+cov[8]*f22+cov[5]*f23);
302 fC30=cov[10]*f00;
303 fC31=cov[11];
304 fC32=cov[10]*f20+cov[13]*f22+cov[12]*f23;
305 fC33=cov[14];
306 fC40=t20;
307 fC41=cov[7];
308 fC42=t22;
309 fC43=cov[13];
310 fC44=cov[9];
311
312 //cout<<" C32 e C44 = "<<fC32<<" "<<fC44<<"\n"; getchar();
313
314}
315
316
317AliITSTrackV1 &AliITSTrackV1::operator=(AliITSTrackV1 obj) {
318//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
319// assignement operator
320
321 delete flistCluster;
322 delete fClusterInTrack;
323 fClusterInTrack = new TMatrix(6,9);
324 flistCluster = new TObjArray;
325 flabel = obj.flabel;
326 fTPCtrack = obj.fTPCtrack;
327 fNumClustInTrack = obj.fNumClustInTrack;
328 fChi2= obj.fChi2;
329 fVertex=obj.fVertex;
330 fErrorVertex=obj.fErrorVertex;
331 fX0=obj.fX0; fX1=obj.fX1; fX2=obj.fX2; fX3=obj.fX3; fX4=obj.fX4;
332 fLayer=obj.fLayer;
333 frtrack=obj.frtrack;
334 fDv=obj.fDv;
335 fZv=obj.fZv;
336 fsigmaDv=obj.fsigmaDv;
337 fsigmaZv=obj.fsigmaZv;
338 fd2=obj.fd2;
339 ftgl2=obj.ftgl2;
70a9314b 340 fdtgl=obj.fdtgl;
341 fnoclust=obj.fnoclust;
aecdf013 342
343 fC00=obj.fC00; fC10=obj.fC10; fC11=obj.fC11; fC20=obj.fC20; fC21=obj.fC21;
344 fC22=obj.fC22; fC30=obj.fC30; fC31=obj.fC31; fC32=obj.fC32; fC33=obj.fC33;
345 fC40=obj.fC40; fC41=obj.fC41; fC42=obj.fC42; fC43=obj.fC43; fC44=obj.fC44;
346
347
348 *fClusterInTrack = *obj.fClusterInTrack;
349 Int_t i;
350 for(i=0; i<obj.flistCluster->GetSize(); i++) flistCluster->AddLast(obj.flistCluster->At(i));
351
352 return *this;
353
354}
355
356void AliITSTrackV1::PutCluster(Int_t layerc, TVector vecclust) {
357//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
358// put information for clusters
359
360 (*fClusterInTrack)(layerc,0) = vecclust(0);
361 (*fClusterInTrack)(layerc,1) = vecclust(1);
362 (*fClusterInTrack)(layerc,2) = vecclust(2);
363 (*fClusterInTrack)(layerc,3) = vecclust(3);
364 (*fClusterInTrack)(layerc,4) = vecclust(4);
365 (*fClusterInTrack)(layerc,5) = vecclust(5);
366 (*fClusterInTrack)(layerc,6) = vecclust(6);
367 (*fClusterInTrack)(layerc,7) = vecclust(7);
368 (*fClusterInTrack)(layerc,8) = vecclust(8);
369
370}
371
372
373void AliITSTrackV1::GetClusters() {
374//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
375// prints the clusters belonging to the current track
376
377 TMatrix a(*fClusterInTrack);
378 TMatrix b(6,3);
379 Int_t i;
380 for(i=0;i<6; i++){
381 b(i,0)=a(i,6); b(i,1)=a(i,7); b(i,2)=a(i,8);
382 }
383 a.Print();
384 // b.Print();
385
386}
387
388
389TVector AliITSTrackV1::GetLabTrack(Int_t lay) {
390//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
391// gets the label of the track
392
393 TVector vecLabel(3);
394 vecLabel(0)=( (Float_t) (*fClusterInTrack)(lay,6) );
395 vecLabel(1)=( (Float_t) (*fClusterInTrack)(lay,7) );
396 vecLabel(2)=( (Float_t) (*fClusterInTrack)(lay,8) );
397 return vecLabel;
398}
399
400void AliITSTrackV1::Search(TVector VecTotLabref, Long_t &labref, Int_t &freq){
401//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
402// define label
403
404 Int_t vecfreq[18];
405
406 Int_t i,j;
407 for(i=0; i<18; i++) vecfreq[i]=0;
408
409 for(i=0; i<18; i++) {
410 for(j=0; j<18; j++) {
411 // if(VecTotLabref(i) == 0.) VecTotLabref(i)=-3.; //commentato il 5-3-2001
412 if( (VecTotLabref(i)>=0.) && (VecTotLabref(i)==VecTotLabref(j)) ) vecfreq[i]++;
413 }
414 }
415 Int_t imax=-1000;
416 Long_t labdefault= (Long_t)1000000.;
417 freq=0;
418 for(i=0; i<18; i++) {
419 if(vecfreq[i]>freq) {freq=vecfreq[i]; imax=i;}
420 }
421 if(imax<0) labref=labdefault; else labref=(Long_t) VecTotLabref(imax);
422}
423
424
425void AliITSTrackV1::Propagation(Double_t rk) {
426//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
427//Propagation of track
428 Double_t duepi=2.*TMath::Pi();
429 Double_t rkm1=frtrack;
430//cout<<" rk e rkm1 dentro Propagation "<<rk<<" "<<rkm1<<"\n";
431
432 //
433 Double_t aAk=ArgA(rk), aAkm1=ArgA(rkm1);
434 Double_t ak=Arga(rk), akm1=Arga(rkm1);
435 fX0+=TMath::ASin(aAk)-TMath::ASin(aAkm1);
436
437 if(fX0>duepi) fX0-=duepi;
438 if(fX0<0.) fX0+=duepi;
439
440 Double_t tgl=fX3;
441 Double_t c=fX4;
442 Double_t d=fX2;
443 Double_t cy=c/2;
444 fX1+=tgl/cy*(TMath::ASin(ak)-TMath::ASin(akm1));
445 frtrack=rk;
446
447
448 Double_t bk=ArgB(rk), bkm1=ArgB(rkm1);
449 Double_t ck=ArgC(rk), ckm1=ArgC(rkm1);
450
451 Double_t f02=ck/TMath::Sqrt(1.-aAk*aAk) - ckm1/TMath::Sqrt(1.-aAkm1*aAkm1);
452 Double_t f04=bk/TMath::Sqrt(1.-aAk*aAk) - bkm1/TMath::Sqrt(1.-aAkm1*aAkm1);
453 Double_t f12=tgl*d*(1./rk - 1./rkm1);
454 Double_t f13=rk - rkm1;
455
456
457 Double_t c00=fC00;
458 Double_t c10=fC10;
459 Double_t c11=fC11;
460 Double_t c20=fC20;
461 Double_t c21=fC21;
462 Double_t c22=fC22;
463 Double_t c30=fC30;
464 Double_t c31=fC31;
465 Double_t c32=fC32;
466 Double_t c33=fC33;
467 Double_t c40=fC40;
468 Double_t c41=fC41;
469 Double_t c42=fC42;
470 Double_t c43=fC43;
471 Double_t c44=fC44;
472
473 Double_t r10=c10+c21*f02+c41*f04;
474 Double_t r20=c20+c22*f02+c42*f04;
475 Double_t r30=c30+c32*f02+c43*f04;
476 Double_t r40=c40+c42*f02+c44*f04;
477 Double_t r21=c21+c22*f12+c32*f13;
478 Double_t r31=c31+c32*f12+c33*f13;
479 Double_t r41=c41+c42*f12+c43*f13;
480
481 fC00=c00+c20*f02+c40*f04+f02*r20+f04*r40;
482 fC10=r10+f12*r20+f13*r30;
483 fC11=c11+c21*f12+c31*f13+f12*r21+f13*r31;
484 fC20=r20;
485 fC21=r21;
486 fC30=r30;
487 fC31=r31;
488 fC40=r40;
489 fC41=r41;
490
491}
492
493void AliITSTrackV1::AddEL(AliITSRad *rl, Double_t signdE, Bool_t flagtot, Double_t mass) {
494//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
495// add energy loss
496
497 TVector s(6);
498 s(0)=0.0026+0.00283; s(1)=0.018; s(2)=0.0094; s(3)=0.0095; s(4)=0.0091; s(5)=0.0087;
499 //s(0)=0.0026+0.00283*2.; s(1)=0.018*2.; s(2)=0.0094; s(3)=0.0095; s(4)=0.0091; s(5)=0.0087;
500 //0.00277 is added in the first layer to take into account the energy loss in the beam pipe
501
502 //for(int k=0; k<6; k++) cout<<s(k)<<" "; cout<<"\n";
503 Int_t k;
70a9314b 504 //for(k=0; k<6; k++) s(k)=s(k)*1.6; //forint
505 for(k=0; k<6; k++) s(k)=s(k)*1.7; //forint
aecdf013 506
507 Double_t phi=fX0;
508
509 if(phi<0.174 ) s(5)=s(5)+0.012;
a3894645 510 if(phi>6.1 ) s(5)=s(5)+0.012; // to take into account rail
511 if(phi>2.96 && phi<3.31 ) s(5)=s(5)+0.012;
aecdf013 512
70a9314b 513 /*
aecdf013 514 Double_t tgl=fX3;
515 Double_t theta=((TMath::Pi())/2.)-TMath::ATan(tgl);
516 //phi*=180./TMath::Pi();
517 //theta*=180./TMath::Pi();
518 //Double_t rad90=(TMath::Pi())/2.;
519 Double_t rad40=(TMath::Pi())*40./180.;
520 Double_t rad100=(TMath::Pi())*100/180;
521 Double_t rad360=(TMath::Pi())*2.;
522 Int_t imax=rl->Getimax();
523 Int_t jmax=rl->Getjmax();
524 Int_t i=(Int_t) ( (theta-rad40)/rad100*imax);
525 Int_t j=(Int_t) ( phi/rad360*jmax );
526 //Int_t i=(Int_t)( ((theta-((TMath::Pi())/4.))/((TMath::Pi())/2.))*imax );
527 //Int_t j=(Int_t)( (phi/((TMath::Pi())*2.))*jmax );
528 if(i<0) i=0;
529 if(i>=imax) i=imax-1;
530 if(j<0) j=0;
531 if(j>=jmax) j=jmax-1;
70a9314b 532
aecdf013 533 s(0) = 0.0028/TMath::Sin(theta)+( rl->GetRadMatrix1() )(i,j); // 0.0028 takes into account the beam pipe
534 s(1) = ( rl->GetRadMatrix2() )(i,j);
535 s(2) = ( rl->GetRadMatrix3() )(i,j);
536 s(3) = ( rl->GetRadMatrix4() )(i,j);
537 s(4) = ( rl->GetRadMatrix5() )(i,j);
538 s(5) = ( rl->GetRadMatrix6() )(i,j);
539
540
541 */
542
543 //for(int k=0; k<6; k++) cout<<s(k)<<" "; getchar();
544
545 //if(phi>60) {cout<<" phi = "<<phi<<"\n"; getchar();}
546 //if(theta<45 || theta>135) {cout<<" theta = "<<theta<<"\n"; getchar();}
547 //cout<<" dentro AddEl: phi, theta = "<<phi<<" "<<theta<<"\n"; getchar();
548
70a9314b 549 Double_t cl=1.+fX3*fX3; // cl=1/(cosl)**2 = 1 + (tgl)**2
aecdf013 550 Double_t sqcl=TMath::Sqrt(cl);
551 Double_t pt=GetPt();
552
553 Double_t p2=pt*pt*cl;
554 Double_t e=TMath::Sqrt(p2+mass*mass);
555 Double_t beta2=p2/(p2+mass*mass);
556
557 Double_t dE;
558 if(flagtot) {
559 Double_t stot=s(0)+s(1)+s(2)+s(3)+s(4)+s(5);
560 dE=0.153/beta2*(log(5940*beta2/(1-beta2)) - beta2)*stot*21.82*sqcl;
561 } else {
562 dE=0.153/beta2*(log(5940*beta2/(1-beta2)) - beta2)*s(fLayer-1)*21.82*sqcl;
563 }
564 dE=signdE*dE/1000.;
565
566 e+=dE;
567 Double_t p=TMath::Sqrt(e*e-mass*mass);
568 Double_t sign=1.;
569 if(fX4 < 0.) sign=-1.;
570 pt=sign*p/sqcl;
a3894645 571 Double_t cc=(0.299792458*0.2*fFieldFactor)/(pt*100.);
aecdf013 572 fX4=cc;
573
574}
575
576void AliITSTrackV1::Correct(Double_t rk) {
577//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
578// correct track to take into account real geometry detector
579
580 Double_t duepi=2.*TMath::Pi();
581 Double_t rkm1=frtrack;
582 Double_t aAk=ArgA(rk), aAkm1=ArgA(rkm1);
583 Double_t ak=Arga(rk), akm1=Arga(rkm1);
584
585 fX0+=TMath::ASin(aAk)-TMath::ASin(aAkm1);
586 if(fX0>duepi) fX0-=duepi;
587 if(fX0<0.) fX0+=duepi;
588
589 Double_t tgl=fX3;
590 Double_t c=fX4;
591 Double_t cy=c/2;
592 fX1+=tgl/cy*(TMath::ASin(ak)-TMath::ASin(akm1));
593 frtrack=rk;
594
595}
596
70a9314b 597void AliITSTrackV1::AddMS(AliITSRad *rl, Double_t mass) {
aecdf013 598//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
599////////// Modification of the covariance matrix to take into account multiple scattering ///////////
600
601 TVector s(6);
602
603 s(0)=0.0026+0.00283; s(1)=0.018; s(2)=0.0094; s(3)=0.0095; s(4)=0.0091; s(5)=0.0087;
604 // s(0)=0.0026+0.00283*2.; s(1)=0.018*2.; s(2)=0.0094; s(3)=0.0095; s(4)=0.0091; s(5)=0.0087;
605//0.00277 is added in the first layer to take into account the energy loss in the beam pipe
606
607 Int_t k;
70a9314b 608 //for(k=0; k<6; k++) s(k)=s(k)*1.6; // forint
609 for(k=0; k<6; k++) s(k)=s(k)*1.7; // forint
aecdf013 610
611 Double_t phi=fX0;
612 if(phi<0.174 ) s(5)=s(5)+0.012; //aggiunta provvisoria
613 if(phi>6.1 ) s(5)=s(5)+0.012; //aggiunta provvisoria
614 if(phi>2.96 && phi< 3.31) s(5)=s(5)+0.012; //aggiunta provvisoria
70a9314b 615
aecdf013 616
617 Double_t tgl=fX3;
70a9314b 618 /*
aecdf013 619 Double_t theta=((TMath::Pi())/2.)-TMath::ATan(tgl);
620 Double_t rad40=(TMath::Pi())*40./180.; // rivedere
621 Double_t rad100=(TMath::Pi())*100/180;
622 Double_t rad360=(TMath::Pi())*2.;
623 Int_t imax=rl->Getimax();
624 Int_t jmax=rl->Getjmax();
625 Int_t i=(Int_t) ( (theta-rad40)/rad100*imax);
626 Int_t j=(Int_t) ( phi/rad360*jmax);
627
628 if(i<0) i=0;
629 if(i>=imax) i=imax-1;
630 if(j<0) j=0;
631 if(j>=jmax) j=jmax-1;
70a9314b 632
aecdf013 633 s(0) = 0.0028/TMath::Sin(theta)+( rl->GetRadMatrix1() )(i,j); // 0.0028 takes into account the beam pipe
634 s(1) = ( rl->GetRadMatrix2() )(i,j);
635 s(2) = ( rl->GetRadMatrix3() )(i,j);
636 s(3) = ( rl->GetRadMatrix4() )(i,j);
637 s(4) = ( rl->GetRadMatrix5() )(i,j);
638 s(5) = ( rl->GetRadMatrix6() )(i,j);
639 */
70a9314b 640 //Double_t mass=0.1396;
aecdf013 641 Int_t layer=(Int_t)GetLayer();
642
643 Double_t cosl=TMath::Cos(TMath::ATan(tgl));
644 Double_t d=fX2;
645 Double_t c=fX4;
646 Double_t cy=c/2.;
647 Double_t q20=1./(cosl*cosl);
648 Double_t q30=c*tgl;
649
650 Double_t q40=cy*(frtrack*frtrack-d*d)/(1.+ 2.*cy*d);
651 Double_t dd=d+cy*d*d-cy*frtrack*frtrack;
652 Double_t dprova=frtrack*frtrack - dd*dd;
653 Double_t q41=0.;
654 if(dprova>0.) q41=-1./cosl*TMath::Sqrt(dprova)/(1.+ 2.*cy*d);
655
656 Double_t p2=(GetPt()*GetPt())/(cosl*cosl);
657 Double_t beta2=p2/(p2+mass*mass);
658 Double_t theta2=14.1*14.1/(beta2*p2*1.e6)*(s(layer-1)/cosl);
659
660 fC22+=theta2*(q40*q40+q41*q41);
661 fC32+=theta2*q20*q40;
662 fC33+=theta2*q20*q20;
663 fC42+=theta2*q30*q40;
664 fC43+=theta2*q30*q20;
665 fC44+=theta2*q30*q30;
666
667}
668void AliITSTrackV1::PrimaryTrack(AliITSRad *rl) {
669//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
670// calculation of part of covariance matrix for vertex constraint
671
672 Double_t rlayer[6];
673
674 rlayer[0]=4.; rlayer[1]=7.; rlayer[2]=14.9; rlayer[3]=23.8;
675 rlayer[4]=39.1; rlayer[5]=43.6;
676
677 Double_t cy=fX4/2.;
678 Double_t tgl=(fX1-fZv)*cy/TMath::ASin(cy*frtrack);
679 Double_t frtrack=1.;
680 fX0=0.;
681 fX1=frtrack*tgl;
682 fX2=fDv;
683 fX3=tgl;
684
685 fC00=fC10=fC11=fC20=fC21=fC22=fC30=fC31=fC32=fC33=fC40=fC41=fC42=fC43=0.;
686
687 AddEL(rl,1.,1);
688 fLayer=0;
689 Int_t i;
690 for (i=0; i<6; i++) {
691 Propagation(rlayer[i]);
692 fLayer++;
693 fd2(i)=fC22;
694 ftgl2(i)=fC33;
695 fdtgl(i)=fC32;
696 AddMS(rl);
697 AddEL(rl,-1,0);
698 }
699}
700
701
702Int_t AliITSTrackV1::DoNotCross(Double_t rk) const{
703//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
704// determine if the track cross a layer
705
706 Double_t c=fX4;
707 Double_t d=fX2;
708 Double_t cy=c/2.;
709 return (TMath::Abs((cy*rk+(1.+cy*d)*d/rk)/(1.+2.*cy*d))>=1.)?1:0;
710}
711
712
713Double_t AliITSTrackV1::ArgA(Double_t rk) const {
714//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
715// quantity usefull in Propagation
716 Double_t c=fX4;
717 Double_t d=fX2;
718 Double_t cy=c/2.;
719 Double_t arg=(cy*rk + (1 + cy*d)*d/rk)/(1.+ 2.*cy*d);
720 if (TMath::Abs(arg) < 1.) return arg;
721 //cout<<"class AliITSTrack: ArgA out of range !\n";/* getchar();*/
722 return (arg>0) ? 0.99999999999 : -0.9999999999;
723}
724
725Double_t AliITSTrackV1::Arga(Double_t rk) const {
726//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
727// quantity usefull in Propagation
728 Double_t c=fX4;
729 Double_t d=fX2;
730 Double_t cy=c/2.;
731 Double_t arg=(rk*rk - d*d)/(1.+ 2.*cy*d);
732 if (arg<0.) {/*cout<<"class AliITSTrack: Arga out of range !\n";*/ arg=0.;}
733 return cy*TMath::Sqrt(arg);
734}
735
736Double_t AliITSTrackV1::ArgB(Double_t rk) const {
737//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
738// quantity usefull in Propagation
739 Double_t c=fX4;
740 Double_t d=fX2;
741 Double_t cy=c/2.;
742 return (rk*rk - d*d)/(rk*(1.+ 2.*cy*d)*(1.+ 2.*cy*d));
743}
744
745Double_t AliITSTrackV1::ArgC(Double_t rk) const {
746//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
747// quantity usefull in Propagation
748 Double_t c=fX4;
749 Double_t d=fX2;
750 Double_t cy=c/2.;
751 return (1./rk - 2.*cy*ArgA(rk)/(1.+ 2.*cy*d));
752}
753
754
70a9314b 755Double_t AliITSTrackV1::GetPredChi2(Double_t m[2], Double_t sigma[2] ) const {
756//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
757// This function calculates a predicted chi2 increment.
758/*
759 Double_t r00=c->GetSigmaY2(), r01=0., r11=c->GetSigmaZ2();
760 r00+=fC00; r01+=fC10; r11+=fC11;
761
762 Double_t det=r00*r11 - r01*r01;
763 if (TMath::Abs(det) < 1.e-10) {
764 Int_t n=GetNumberOfClusters();
765 if (n>4) cerr<<n<<" AliKalmanTrack warning: Singular matrix !\n";
766 return 1e10;
767 }
768 Double_t tmp=r00; r00=r11; r11=tmp; r01=-r01;
769
770 Double_t dy=c->GetY() - fP0, dz=c->GetZ() - fP1;
771
772 return (dy*r00*dy + 2*r01*dy*dz + dz*r11*dz)/det;
773 */
774
775
776 Double_t r00=sigma[0], r01=0., r11=sigma[1];
777 r00+=fC00; r01+=fC10; r11+=fC11;
778 Double_t det=r00*r11-r01*r01;
779 if(TMath::Abs(det) < 1.e-15) {cout<<" Problems on matrix in GetPredChi2 "<<det<<"\n";
780 return 1e10;}
781 Double_t tmp=r00; r00=r11; r11=tmp; r01=-r01;
782 Double_t dphi=m[0]-fX0;
783 Double_t dz=m[1]-fX1;
784 Double_t chi2 = (dphi*r00*dphi +2.*r01*dphi*dz + dz*r11*dz)/det;
785 return chi2;
786
787
788
aecdf013 789
70a9314b 790}