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Updated Linkdef and libTOF.pkg
[u/mrichter/AliRoot.git] / ITS / AliITSTrackV1.cxx
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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
fd58b6ae 22// default constructor
23
24 fTPCtrack = 0;
25 fC00=fC10=fC11=fC20=fC21=fC22=fC30=fC31=fC32=fC33=fC40=fC41=fC42=fC43=fC44=0.;
26 flistCluster = 0;
27 fNumClustInTrack =0;
28 fChi2=-1;
29 flabel =0;
30 fLayer = -1;
31 fClusterInTrack = 0;
32 frtrack=0.;
33 fnoclust=0;
34 fMass=0.13956995; //a pion by default
35 fFieldFactor = 0.0;
36
37}
38AliITSTrackV1::AliITSTrackV1(const char *opt) {
39//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
aecdf013 40// default constructor
41
55cd883f 42 fTPCtrack = 0;
aecdf013 43 fC00=fC10=fC11=fC20=fC21=fC22=fC30=fC31=fC32=fC33=fC40=fC41=fC42=fC43=fC44=0.;
cf411bb5 44 flistCluster = 0;
aecdf013 45 fNumClustInTrack =0;
46 fChi2=-1;
47 flabel =0;
48 fVertex.ResizeTo(3);
49 fErrorVertex.ResizeTo(3);
50 fLayer = -1;
cf411bb5 51 fClusterInTrack = 0;
70a9314b 52 frtrack=0.;
53 fnoclust=0;
aecdf013 54 fd2.ResizeTo(6);
55 ftgl2.ResizeTo(6);
a3894645 56 fdtgl.ResizeTo(6);
61231d74 57 fMass=0.13956995; //a pion by default
a3894645 58
59//////////////////////////////////////// gets magnetic field factor ////////////////////////////////
60
61 AliMagF * fieldPointer = gAlice->Field();
62 fFieldFactor = (Double_t)fieldPointer->Factor();
63 //cout<< " field factor = "<<fFieldFactor<<"\n"; getchar();
64
65/////////////////////////////////////////////////////////////////////////////////////////////////////////
66
aecdf013 67}
68
69
70
71AliITSTrackV1::AliITSTrackV1(const AliITSTrackV1 &cobj) {
72//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
73// copy constructor
74
75 fClusterInTrack = new TMatrix(6,9);
b7a35fb7 76 Int_t i,j;
b7a35fb7 77 for(i=0; i<6; i++){
64ab0d55 78 for(j=0; j<9; j++) (*fClusterInTrack)(i,j)=-1.;
b7a35fb7 79 }
aecdf013 80 flistCluster = new TObjArray;
81 fVertex.ResizeTo(3);
82 fErrorVertex.ResizeTo(3);
83 fVertex = cobj.fVertex;
84 fErrorVertex = cobj.fErrorVertex;
85 flabel = cobj.flabel;
86 fLayer=cobj.fLayer;
87 fTPCtrack = cobj.fTPCtrack;
88 fNumClustInTrack = cobj.fNumClustInTrack;
89 fChi2= cobj.fChi2;
90 fX0=cobj.fX0; fX1=cobj.fX1; fX2=cobj.fX2; fX3=cobj.fX3; fX4=cobj.fX4;
91 frtrack=cobj.frtrack;
92 fDv=cobj.fDv;
93 fZv=cobj.fZv;
94 fsigmaDv=cobj.fsigmaDv;
95 fsigmaZv=cobj.fsigmaZv;
96 fd2.ResizeTo(6);
97 ftgl2.ResizeTo(6);
98 fdtgl.ResizeTo(6);
99 fd2=cobj.fd2;
100 ftgl2=cobj.ftgl2;
101 fdtgl=cobj.fdtgl;
70a9314b 102 fnoclust=cobj.fnoclust;
aecdf013 103
104 fC00=cobj.fC00; fC10=cobj.fC10; fC11=cobj.fC11; fC20=cobj.fC20; fC21=cobj.fC21;
105 fC22=cobj.fC22; fC30=cobj.fC30; fC31=cobj.fC31; fC32=cobj.fC32; fC33=cobj.fC33;
106 fC40=cobj.fC40; fC41=cobj.fC41; fC42=cobj.fC42; fC43=cobj.fC43; fC44=cobj.fC44;
107
108 *fClusterInTrack = *cobj.fClusterInTrack;
a3894645 109
110 fFieldFactor=cobj.fFieldFactor;
61231d74 111 fMass=cobj.fMass;
112
aecdf013 113 for(i=0; i<cobj.flistCluster->GetSize(); i++)
114 flistCluster->AddLast(cobj.flistCluster->At(i));
115
116}
117
118AliITSTrackV1::AliITSTrackV1(AliTPCtrack &obj)
119{
120//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
121// special constructor to convert a TPC track into an ITS track
122
a3894645 123//////////////////////////////////////// gets magnetic field factor ////////////////////////////////
124
125 AliMagF * fieldPointer = gAlice->Field();
126 fFieldFactor = (Double_t)fieldPointer->Factor();
127 //cout<< " field factor = "<<fFieldFactor<<"\n"; getchar();
128
129/////////////////////////////////////////////////////////////////////////////////////////////////////////
130
131
aecdf013 132 fTPCtrack = &obj;
133 fVertex.ResizeTo(3);
134 fErrorVertex.ResizeTo(3);
135
136 fd2.ResizeTo(6);
137 ftgl2.ResizeTo(6);
138 fdtgl.ResizeTo(6);
139 AliGenerator *gener = gAlice->Generator();
140 Float_t vxg,vyg,vzg;
141 gener->GetOrigin(vxg,vyg,vzg);
142
143
144 fVertex(0)=(Double_t)vxg;
145 fVertex(1)=(Double_t)vyg;
146 fVertex(2)=(Double_t)vzg;
147
148 fLayer = 7;
aecdf013 149 fClusterInTrack = new TMatrix(6,9);
150
b7a35fb7 151 Int_t i,j;
b7a35fb7 152 for(i=0; i<6; i++){
64ab0d55 153 for(j=0; j<9; j++) (*fClusterInTrack)(i,j)=-1.;
b7a35fb7 154 }
aecdf013 155 flistCluster = new TObjArray;
70a9314b 156 fNumClustInTrack = 0;
157 fnoclust=0;
aecdf013 158 LmTPC();
159
160}
161
162
163AliITSTrackV1::~AliITSTrackV1() {
164//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
165//destructor
166
e73fe7f3 167 if(flistCluster) {
168 flistCluster->Delete();
169 delete flistCluster;
170 }
aecdf013 171 if(fClusterInTrack) delete fClusterInTrack;
172
173}
174
175void AliITSTrackV1::PutCElements(Double_t C00, Double_t C10, Double_t C11, Double_t C20, Double_t C21,
176Double_t C22, Double_t C30, Double_t C31, Double_t C32, Double_t C33, Double_t C40,
177Double_t C41, Double_t C42, Double_t C43, Double_t C44){
178//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
179// puts elements of covariance matrix
180
181 fC00=C00; fC10=C10; fC11=C11; fC20=C20; fC21=C21; fC22=C22; fC30=C30; fC31=C31; fC32=C32; fC33=C33;
182 fC40=C40; fC41=C41; fC42=C42; fC43=C43; fC44=C44;
183}
184
185void AliITSTrackV1::GetCElements(Double_t &C00, Double_t &C10, Double_t &C11, Double_t &C20, Double_t &C21,
186Double_t &C22, Double_t &C30, Double_t &C31, Double_t &C32, Double_t &C33, Double_t &C40,
187Double_t &C41, Double_t &C42, Double_t &C43, Double_t &C44) const {
188//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
189// gets elements of covariance matrix
190
191
192 C00=fC00; C10=fC10; C11=fC11; C20=fC20; C21=fC21; C22=fC22; C30=fC30; C31=fC31; C32=fC32; C33=fC33;
193 C40=fC40; C41=fC41; C42=fC42; C43=fC43; C44=fC44;
194
195}
196
197void AliITSTrackV1::GetXElements(Double_t &X0, Double_t &X1, Double_t &X2, Double_t &X3, Double_t &X4) const {
198//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
199// gets the elements of the state vector
200 X0=fX0; X1=fX1; X2=fX2; X3=fX3; X4=fX4;
201}
202
203void AliITSTrackV1::PutXElements(Double_t X0, Double_t X1, Double_t X2, Double_t X3, Double_t X4){
204//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
205// puts the elements of the state vector
206 fX0=X0; fX1=X1; fX2=X2; fX3=X3; fX4=X4;
207}
208
209void AliITSTrackV1::LmTPC() {
210//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
211// Transform the TPC state vector from TPC-local to master and build a new state vector ITS-type
212// The covariance matrix is also modified accordingly
213
214
215 Double_t alpha = fTPCtrack->GetAlpha();
216
217 //printf("LmTPC: alpha %f\n",alpha);
218
219 Double_t yTPC = fTPCtrack->GetY();
220 Double_t zTPC = fTPCtrack->GetZ();
221 Double_t cTPC = fTPCtrack->GetC();
222 Double_t etaTPC = fTPCtrack->GetEta();
223 Double_t tglTPC = fTPCtrack->GetTgl();
224
225
226 Double_t xm, ym, zm;
227 Double_t sina = TMath::Sin(alpha);
228 Double_t cosa = TMath::Cos(alpha);
229 Double_t xl= fTPCtrack->GetX();
230 xm = xl * cosa - yTPC*sina;
231 ym = xl * sina + yTPC*cosa;
232 zm = zTPC;
233 //cout<<" xl e alpha = "<<xl<<" "<<alpha<<"\n"; getchar();
234
235 Double_t x0m,y0m;
236
237 ///////////////////////////////////// determine yo //////////////////////////////////////////////////
238
239 Double_t vxl=fVertex(0)*cosa+fVertex(1)*sina;
240 Double_t vyl= -fVertex(0)*sina+fVertex(1)*cosa;
241 Double_t xo,yo, signy;
242 Double_t r = 1./cTPC;
243 xo = etaTPC / cTPC;
aecdf013 244 Double_t yo1, yo2, diffsq1, diffsq2;
245 yo1 = yTPC + TMath::Sqrt(r*r - (xl-xo)*(xl-xo));
246 yo2 = yTPC - TMath::Sqrt(r*r - (xl-xo)*(xl-xo));
247 diffsq1=TMath::Abs((yo1-vyl)*(yo1-vyl)+(xo-vxl)*(xo-vxl)-r*r);
248 diffsq2=TMath::Abs((yo2-vyl)*(yo2- vyl)+(xo-vxl)*(xo-vxl)-r*r);
249 if(diffsq1<diffsq2) {yo=yo1; signy=1.;} else {yo=yo2; signy=-1.;};
250
251 ////////////////////////////////////////////////////////////////////////////////////////////////////
252
253 x0m = xo * cosa - yo * sina;
254 y0m = xo * sina + yo * cosa;
255
256 frtrack=TMath::Sqrt(xm*xm+ym*ym);
70a9314b 257
61231d74 258 Double_t phi=TMath::ATan2(ym,xm); if(phi<0) phi=2.*TMath::Pi()+phi;
aecdf013 259
260 fX0=phi;
261 fX1=zm;
262 fX3=tglTPC;
263 fX4=cTPC;
264
265
266 Double_t dd=TMath::Sqrt((x0m-fVertex(0))*(x0m-fVertex(0))+(y0m-fVertex(1))*(y0m-fVertex(1)));
267 Double_t signdd;
268 if (r>0) signdd=1.; else signdd=-1.;
269 fX2=signdd*dd-r;
270 //cout<<" fvertex = "<<fVertex(0)<<" "<<fVertex(1)<<" "<<fVertex(2)<<"\n";
271
272 Double_t cov[15];
273 fTPCtrack->GetCovariance(cov);
274
275 Double_t dfidy, dDdy, dDdC, dDdeta;
276
277 dfidy=(xm*cosa+ym*sina)/(frtrack*frtrack);
278 dDdy=signdd*((y0m-fVertex(1))*cosa-(x0m-fVertex(0))*sina)/dd;
279 Double_t dyodr=signy*(r+(xl-xo)*etaTPC)/TMath::Sqrt(r*r-(xl-xo)*(xl-xo));
280 Double_t dyomdr=sina*etaTPC+cosa*dyodr;
281 Double_t dxomdr=cosa*etaTPC-sina*dyodr;
282 Double_t ddddR=((x0m-fVertex(0))*dxomdr+(y0m-fVertex(1))*dyomdr)/dd;
283 dDdC=-r*r*(signdd*ddddR-1.);
284 Double_t dyoldxol=signy*(xl-xo)/TMath::Sqrt(r*r-(xl-xo)*(xl-xo));
285 Double_t dxomdeta=r*(cosa-sina*dyoldxol);
286 Double_t dyomdeta=r*(sina+cosa*dyoldxol);
287 dDdeta=signdd*((x0m-fVertex(0))*dxomdeta+(y0m-fVertex(1))*dyomdeta)/dd;
288
289 Double_t f00=dfidy;
290 Double_t f20=dDdy;
291 Double_t f22=dDdC;
292 Double_t f23=dDdeta;
293
294 Double_t t00=cov[0]*f00;
295 Double_t t02=cov[0]*f20+cov[6]*f22+cov[3]*f23;
296 Double_t t20=cov[6]*f00;
297 Double_t t22=cov[6]*f20+cov[9]*f22+cov[8]*f23;
298
299 fC00=f00*t00;
300 fC10=cov[1]*f00;
301 fC11=cov[2];
302 fC20=f20*t00+f22*t20+f23*cov[3]*f00;
303 fC21=f20*cov[1]+f22*cov[7]+f23*cov[4];
304 fC22=f20*t02+f22*t22+f23*(cov[3]*f20+cov[8]*f22+cov[5]*f23);
305 fC30=cov[10]*f00;
306 fC31=cov[11];
307 fC32=cov[10]*f20+cov[13]*f22+cov[12]*f23;
308 fC33=cov[14];
309 fC40=t20;
310 fC41=cov[7];
311 fC42=t22;
312 fC43=cov[13];
313 fC44=cov[9];
314
aecdf013 315
316}
317
318
319AliITSTrackV1 &AliITSTrackV1::operator=(AliITSTrackV1 obj) {
320//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
321// assignement operator
322
e73fe7f3 323 if (flistCluster) {
324 flistCluster->Delete();
325 delete flistCluster;
326 }
aecdf013 327 delete fClusterInTrack;
328 fClusterInTrack = new TMatrix(6,9);
329 flistCluster = new TObjArray;
330 flabel = obj.flabel;
331 fTPCtrack = obj.fTPCtrack;
332 fNumClustInTrack = obj.fNumClustInTrack;
333 fChi2= obj.fChi2;
334 fVertex=obj.fVertex;
335 fErrorVertex=obj.fErrorVertex;
336 fX0=obj.fX0; fX1=obj.fX1; fX2=obj.fX2; fX3=obj.fX3; fX4=obj.fX4;
337 fLayer=obj.fLayer;
338 frtrack=obj.frtrack;
339 fDv=obj.fDv;
340 fZv=obj.fZv;
341 fsigmaDv=obj.fsigmaDv;
342 fsigmaZv=obj.fsigmaZv;
343 fd2=obj.fd2;
344 ftgl2=obj.ftgl2;
70a9314b 345 fdtgl=obj.fdtgl;
346 fnoclust=obj.fnoclust;
aecdf013 347
348 fC00=obj.fC00; fC10=obj.fC10; fC11=obj.fC11; fC20=obj.fC20; fC21=obj.fC21;
349 fC22=obj.fC22; fC30=obj.fC30; fC31=obj.fC31; fC32=obj.fC32; fC33=obj.fC33;
61231d74 350 fC40=obj.fC40; fC41=obj.fC41; fC42=obj.fC42; fC43=obj.fC43; fC44=obj.fC44;
351
352 fMass=obj.fMass;
aecdf013 353
354 *fClusterInTrack = *obj.fClusterInTrack;
355 Int_t i;
356 for(i=0; i<obj.flistCluster->GetSize(); i++) flistCluster->AddLast(obj.flistCluster->At(i));
357
358 return *this;
359
360}
361
362void AliITSTrackV1::PutCluster(Int_t layerc, TVector vecclust) {
363//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
364// put information for clusters
365
366 (*fClusterInTrack)(layerc,0) = vecclust(0);
367 (*fClusterInTrack)(layerc,1) = vecclust(1);
368 (*fClusterInTrack)(layerc,2) = vecclust(2);
369 (*fClusterInTrack)(layerc,3) = vecclust(3);
370 (*fClusterInTrack)(layerc,4) = vecclust(4);
371 (*fClusterInTrack)(layerc,5) = vecclust(5);
372 (*fClusterInTrack)(layerc,6) = vecclust(6);
373 (*fClusterInTrack)(layerc,7) = vecclust(7);
374 (*fClusterInTrack)(layerc,8) = vecclust(8);
375
376}
377
378
379void AliITSTrackV1::GetClusters() {
380//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
381// prints the clusters belonging to the current track
382
383 TMatrix a(*fClusterInTrack);
384 TMatrix b(6,3);
385 Int_t i;
386 for(i=0;i<6; i++){
387 b(i,0)=a(i,6); b(i,1)=a(i,7); b(i,2)=a(i,8);
388 }
389 a.Print();
390 // b.Print();
391
392}
393
394
395TVector AliITSTrackV1::GetLabTrack(Int_t lay) {
396//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
397// gets the label of the track
398
399 TVector vecLabel(3);
400 vecLabel(0)=( (Float_t) (*fClusterInTrack)(lay,6) );
401 vecLabel(1)=( (Float_t) (*fClusterInTrack)(lay,7) );
402 vecLabel(2)=( (Float_t) (*fClusterInTrack)(lay,8) );
403 return vecLabel;
404}
405
406void AliITSTrackV1::Search(TVector VecTotLabref, Long_t &labref, Int_t &freq){
407//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
408// define label
409
410 Int_t vecfreq[18];
411
412 Int_t i,j;
413 for(i=0; i<18; i++) vecfreq[i]=0;
414
415 for(i=0; i<18; i++) {
416 for(j=0; j<18; j++) {
417 // if(VecTotLabref(i) == 0.) VecTotLabref(i)=-3.; //commentato il 5-3-2001
418 if( (VecTotLabref(i)>=0.) && (VecTotLabref(i)==VecTotLabref(j)) ) vecfreq[i]++;
419 }
420 }
421 Int_t imax=-1000;
422 Long_t labdefault= (Long_t)1000000.;
423 freq=0;
424 for(i=0; i<18; i++) {
425 if(vecfreq[i]>freq) {freq=vecfreq[i]; imax=i;}
426 }
427 if(imax<0) labref=labdefault; else labref=(Long_t) VecTotLabref(imax);
428}
429
430
431void AliITSTrackV1::Propagation(Double_t rk) {
432//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
433//Propagation of track
434 Double_t duepi=2.*TMath::Pi();
435 Double_t rkm1=frtrack;
436//cout<<" rk e rkm1 dentro Propagation "<<rk<<" "<<rkm1<<"\n";
437
438 //
439 Double_t aAk=ArgA(rk), aAkm1=ArgA(rkm1);
440 Double_t ak=Arga(rk), akm1=Arga(rkm1);
441 fX0+=TMath::ASin(aAk)-TMath::ASin(aAkm1);
442
443 if(fX0>duepi) fX0-=duepi;
444 if(fX0<0.) fX0+=duepi;
445
446 Double_t tgl=fX3;
447 Double_t c=fX4;
448 Double_t d=fX2;
449 Double_t cy=c/2;
450 fX1+=tgl/cy*(TMath::ASin(ak)-TMath::ASin(akm1));
451 frtrack=rk;
452
453
454 Double_t bk=ArgB(rk), bkm1=ArgB(rkm1);
455 Double_t ck=ArgC(rk), ckm1=ArgC(rkm1);
456
457 Double_t f02=ck/TMath::Sqrt(1.-aAk*aAk) - ckm1/TMath::Sqrt(1.-aAkm1*aAkm1);
458 Double_t f04=bk/TMath::Sqrt(1.-aAk*aAk) - bkm1/TMath::Sqrt(1.-aAkm1*aAkm1);
459 Double_t f12=tgl*d*(1./rk - 1./rkm1);
460 Double_t f13=rk - rkm1;
461
462
463 Double_t c00=fC00;
464 Double_t c10=fC10;
465 Double_t c11=fC11;
466 Double_t c20=fC20;
467 Double_t c21=fC21;
468 Double_t c22=fC22;
469 Double_t c30=fC30;
470 Double_t c31=fC31;
471 Double_t c32=fC32;
472 Double_t c33=fC33;
473 Double_t c40=fC40;
474 Double_t c41=fC41;
475 Double_t c42=fC42;
476 Double_t c43=fC43;
477 Double_t c44=fC44;
478
479 Double_t r10=c10+c21*f02+c41*f04;
480 Double_t r20=c20+c22*f02+c42*f04;
481 Double_t r30=c30+c32*f02+c43*f04;
482 Double_t r40=c40+c42*f02+c44*f04;
483 Double_t r21=c21+c22*f12+c32*f13;
484 Double_t r31=c31+c32*f12+c33*f13;
485 Double_t r41=c41+c42*f12+c43*f13;
486
487 fC00=c00+c20*f02+c40*f04+f02*r20+f04*r40;
488 fC10=r10+f12*r20+f13*r30;
489 fC11=c11+c21*f12+c31*f13+f12*r21+f13*r31;
490 fC20=r20;
491 fC21=r21;
492 fC30=r30;
493 fC31=r31;
494 fC40=r40;
495 fC41=r41;
496
497}
498
499void AliITSTrackV1::AddEL(AliITSRad *rl, Double_t signdE, Bool_t flagtot, Double_t mass) {
500//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
501// add energy loss
502
61231d74 503 mass=fMass;
504
aecdf013 505 TVector s(6);
506 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;
507 //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;
508 //0.00277 is added in the first layer to take into account the energy loss in the beam pipe
509
510 //for(int k=0; k<6; k++) cout<<s(k)<<" "; cout<<"\n";
511 Int_t k;
70a9314b 512 //for(k=0; k<6; k++) s(k)=s(k)*1.6; //forint
513 for(k=0; k<6; k++) s(k)=s(k)*1.7; //forint
aecdf013 514
515 Double_t phi=fX0;
516
517 if(phi<0.174 ) s(5)=s(5)+0.012;
a3894645 518 if(phi>6.1 ) s(5)=s(5)+0.012; // to take into account rail
519 if(phi>2.96 && phi<3.31 ) s(5)=s(5)+0.012;
aecdf013 520
70a9314b 521 /*
aecdf013 522 Double_t tgl=fX3;
523 Double_t theta=((TMath::Pi())/2.)-TMath::ATan(tgl);
524 //phi*=180./TMath::Pi();
525 //theta*=180./TMath::Pi();
526 //Double_t rad90=(TMath::Pi())/2.;
527 Double_t rad40=(TMath::Pi())*40./180.;
528 Double_t rad100=(TMath::Pi())*100/180;
529 Double_t rad360=(TMath::Pi())*2.;
530 Int_t imax=rl->Getimax();
531 Int_t jmax=rl->Getjmax();
532 Int_t i=(Int_t) ( (theta-rad40)/rad100*imax);
533 Int_t j=(Int_t) ( phi/rad360*jmax );
534 //Int_t i=(Int_t)( ((theta-((TMath::Pi())/4.))/((TMath::Pi())/2.))*imax );
535 //Int_t j=(Int_t)( (phi/((TMath::Pi())*2.))*jmax );
536 if(i<0) i=0;
537 if(i>=imax) i=imax-1;
538 if(j<0) j=0;
539 if(j>=jmax) j=jmax-1;
70a9314b 540
aecdf013 541 s(0) = 0.0028/TMath::Sin(theta)+( rl->GetRadMatrix1() )(i,j); // 0.0028 takes into account the beam pipe
542 s(1) = ( rl->GetRadMatrix2() )(i,j);
543 s(2) = ( rl->GetRadMatrix3() )(i,j);
544 s(3) = ( rl->GetRadMatrix4() )(i,j);
545 s(4) = ( rl->GetRadMatrix5() )(i,j);
546 s(5) = ( rl->GetRadMatrix6() )(i,j);
547
548
549 */
550
551 //for(int k=0; k<6; k++) cout<<s(k)<<" "; getchar();
552
553 //if(phi>60) {cout<<" phi = "<<phi<<"\n"; getchar();}
554 //if(theta<45 || theta>135) {cout<<" theta = "<<theta<<"\n"; getchar();}
555 //cout<<" dentro AddEl: phi, theta = "<<phi<<" "<<theta<<"\n"; getchar();
556
70a9314b 557 Double_t cl=1.+fX3*fX3; // cl=1/(cosl)**2 = 1 + (tgl)**2
aecdf013 558 Double_t sqcl=TMath::Sqrt(cl);
559 Double_t pt=GetPt();
560
561 Double_t p2=pt*pt*cl;
562 Double_t e=TMath::Sqrt(p2+mass*mass);
563 Double_t beta2=p2/(p2+mass*mass);
564
565 Double_t dE;
566 if(flagtot) {
567 Double_t stot=s(0)+s(1)+s(2)+s(3)+s(4)+s(5);
568 dE=0.153/beta2*(log(5940*beta2/(1-beta2)) - beta2)*stot*21.82*sqcl;
569 } else {
570 dE=0.153/beta2*(log(5940*beta2/(1-beta2)) - beta2)*s(fLayer-1)*21.82*sqcl;
571 }
572 dE=signdE*dE/1000.;
573
574 e+=dE;
575 Double_t p=TMath::Sqrt(e*e-mass*mass);
576 Double_t sign=1.;
577 if(fX4 < 0.) sign=-1.;
578 pt=sign*p/sqcl;
a3894645 579 Double_t cc=(0.299792458*0.2*fFieldFactor)/(pt*100.);
aecdf013 580 fX4=cc;
581
582}
583
584void AliITSTrackV1::Correct(Double_t rk) {
585//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
586// correct track to take into account real geometry detector
587
588 Double_t duepi=2.*TMath::Pi();
589 Double_t rkm1=frtrack;
590 Double_t aAk=ArgA(rk), aAkm1=ArgA(rkm1);
591 Double_t ak=Arga(rk), akm1=Arga(rkm1);
592
593 fX0+=TMath::ASin(aAk)-TMath::ASin(aAkm1);
594 if(fX0>duepi) fX0-=duepi;
595 if(fX0<0.) fX0+=duepi;
596
597 Double_t tgl=fX3;
598 Double_t c=fX4;
599 Double_t cy=c/2;
600 fX1+=tgl/cy*(TMath::ASin(ak)-TMath::ASin(akm1));
601 frtrack=rk;
602
603}
604
70a9314b 605void AliITSTrackV1::AddMS(AliITSRad *rl, Double_t mass) {
aecdf013 606//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
607////////// Modification of the covariance matrix to take into account multiple scattering ///////////
608
61231d74 609 mass=fMass;
610
aecdf013 611 TVector s(6);
612
613 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;
614 // 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;
615//0.00277 is added in the first layer to take into account the energy loss in the beam pipe
616
617 Int_t k;
70a9314b 618 //for(k=0; k<6; k++) s(k)=s(k)*1.6; // forint
619 for(k=0; k<6; k++) s(k)=s(k)*1.7; // forint
aecdf013 620
621 Double_t phi=fX0;
622 if(phi<0.174 ) s(5)=s(5)+0.012; //aggiunta provvisoria
623 if(phi>6.1 ) s(5)=s(5)+0.012; //aggiunta provvisoria
624 if(phi>2.96 && phi< 3.31) s(5)=s(5)+0.012; //aggiunta provvisoria
70a9314b 625
aecdf013 626
627 Double_t tgl=fX3;
70a9314b 628 /*
aecdf013 629 Double_t theta=((TMath::Pi())/2.)-TMath::ATan(tgl);
630 Double_t rad40=(TMath::Pi())*40./180.; // rivedere
631 Double_t rad100=(TMath::Pi())*100/180;
632 Double_t rad360=(TMath::Pi())*2.;
633 Int_t imax=rl->Getimax();
634 Int_t jmax=rl->Getjmax();
635 Int_t i=(Int_t) ( (theta-rad40)/rad100*imax);
636 Int_t j=(Int_t) ( phi/rad360*jmax);
637
638 if(i<0) i=0;
639 if(i>=imax) i=imax-1;
640 if(j<0) j=0;
641 if(j>=jmax) j=jmax-1;
70a9314b 642
aecdf013 643 s(0) = 0.0028/TMath::Sin(theta)+( rl->GetRadMatrix1() )(i,j); // 0.0028 takes into account the beam pipe
644 s(1) = ( rl->GetRadMatrix2() )(i,j);
645 s(2) = ( rl->GetRadMatrix3() )(i,j);
646 s(3) = ( rl->GetRadMatrix4() )(i,j);
647 s(4) = ( rl->GetRadMatrix5() )(i,j);
648 s(5) = ( rl->GetRadMatrix6() )(i,j);
649 */
70a9314b 650 //Double_t mass=0.1396;
aecdf013 651 Int_t layer=(Int_t)GetLayer();
652
653 Double_t cosl=TMath::Cos(TMath::ATan(tgl));
654 Double_t d=fX2;
655 Double_t c=fX4;
656 Double_t cy=c/2.;
657 Double_t q20=1./(cosl*cosl);
658 Double_t q30=c*tgl;
659
660 Double_t q40=cy*(frtrack*frtrack-d*d)/(1.+ 2.*cy*d);
661 Double_t dd=d+cy*d*d-cy*frtrack*frtrack;
662 Double_t dprova=frtrack*frtrack - dd*dd;
663 Double_t q41=0.;
664 if(dprova>0.) q41=-1./cosl*TMath::Sqrt(dprova)/(1.+ 2.*cy*d);
665
666 Double_t p2=(GetPt()*GetPt())/(cosl*cosl);
667 Double_t beta2=p2/(p2+mass*mass);
61231d74 668 // Double_t theta2=14.1*14.1/(beta2*p2*1.e6)*(s(layer-1)/cosl);
669 Double_t theta2=14.1*14.1/(beta2*p2*1.e6)*(s(layer-1)/TMath::Abs(cosl));
aecdf013 670
671 fC22+=theta2*(q40*q40+q41*q41);
672 fC32+=theta2*q20*q40;
673 fC33+=theta2*q20*q20;
674 fC42+=theta2*q30*q40;
675 fC43+=theta2*q30*q20;
676 fC44+=theta2*q30*q30;
677
678}
679void AliITSTrackV1::PrimaryTrack(AliITSRad *rl) {
680//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
681// calculation of part of covariance matrix for vertex constraint
682
683 Double_t rlayer[6];
684
685 rlayer[0]=4.; rlayer[1]=7.; rlayer[2]=14.9; rlayer[3]=23.8;
686 rlayer[4]=39.1; rlayer[5]=43.6;
687
688 Double_t cy=fX4/2.;
689 Double_t tgl=(fX1-fZv)*cy/TMath::ASin(cy*frtrack);
690 Double_t frtrack=1.;
691 fX0=0.;
692 fX1=frtrack*tgl;
693 fX2=fDv;
694 fX3=tgl;
695
696 fC00=fC10=fC11=fC20=fC21=fC22=fC30=fC31=fC32=fC33=fC40=fC41=fC42=fC43=0.;
697
698 AddEL(rl,1.,1);
699 fLayer=0;
700 Int_t i;
701 for (i=0; i<6; i++) {
702 Propagation(rlayer[i]);
703 fLayer++;
704 fd2(i)=fC22;
705 ftgl2(i)=fC33;
706 fdtgl(i)=fC32;
707 AddMS(rl);
708 AddEL(rl,-1,0);
709 }
710}
711
712
713Int_t AliITSTrackV1::DoNotCross(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// determine if the track cross a layer
716
717 Double_t c=fX4;
718 Double_t d=fX2;
719 Double_t cy=c/2.;
720 return (TMath::Abs((cy*rk+(1.+cy*d)*d/rk)/(1.+2.*cy*d))>=1.)?1:0;
721}
722
723
724Double_t AliITSTrackV1::ArgA(Double_t rk) const {
725//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
726// quantity usefull in Propagation
727 Double_t c=fX4;
728 Double_t d=fX2;
729 Double_t cy=c/2.;
730 Double_t arg=(cy*rk + (1 + cy*d)*d/rk)/(1.+ 2.*cy*d);
731 if (TMath::Abs(arg) < 1.) return arg;
732 //cout<<"class AliITSTrack: ArgA out of range !\n";/* getchar();*/
733 return (arg>0) ? 0.99999999999 : -0.9999999999;
734}
735
736Double_t AliITSTrackV1::Arga(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 Double_t arg=(rk*rk - d*d)/(1.+ 2.*cy*d);
743 if (arg<0.) {/*cout<<"class AliITSTrack: Arga out of range !\n";*/ arg=0.;}
744 return cy*TMath::Sqrt(arg);
745}
746
747Double_t AliITSTrackV1::ArgB(Double_t rk) const {
748//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
749// quantity usefull in Propagation
750 Double_t c=fX4;
751 Double_t d=fX2;
752 Double_t cy=c/2.;
753 return (rk*rk - d*d)/(rk*(1.+ 2.*cy*d)*(1.+ 2.*cy*d));
754}
755
756Double_t AliITSTrackV1::ArgC(Double_t rk) const {
757//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
758// quantity usefull in Propagation
759 Double_t c=fX4;
760 Double_t d=fX2;
761 Double_t cy=c/2.;
762 return (1./rk - 2.*cy*ArgA(rk)/(1.+ 2.*cy*d));
763}
764
765
70a9314b 766Double_t AliITSTrackV1::GetPredChi2(Double_t m[2], Double_t sigma[2] ) const {
767//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
768// This function calculates a predicted chi2 increment.
64ab0d55 769
70a9314b 770 Double_t r00=sigma[0], r01=0., r11=sigma[1];
771 r00+=fC00; r01+=fC10; r11+=fC11;
772 Double_t det=r00*r11-r01*r01;
773 if(TMath::Abs(det) < 1.e-15) {cout<<" Problems on matrix in GetPredChi2 "<<det<<"\n";
774 return 1e10;}
775 Double_t tmp=r00; r00=r11; r11=tmp; r01=-r01;
776 Double_t dphi=m[0]-fX0;
777 Double_t dz=m[1]-fX1;
778 Double_t chi2 = (dphi*r00*dphi +2.*r01*dphi*dz + dz*r11*dz)/det;
779 return chi2;
780
70a9314b 781}