]> git.uio.no Git - u/mrichter/AliRoot.git/blame - ITS/AliITSTrackV1.cxx
git://git.uio.no / u / mrichter / AliRoot.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Fixes added to get into account the new magnetic field conversion factor automatically
[u/mrichter/AliRoot.git] / ITS / AliITSTrackV1.cxx
CommitLineData
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//
4ae5bbc4 7#include <Riostream.h>
aecdf013 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"
af50998a 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}
af50998a 38AliITSTrackV1::AliITSTrackV1(const char *opt, Double_t fieldfactor) {
fd58b6ae 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
af50998a 61 // AliMagF * fieldPointer = gAlice->Field();
62 // fFieldFactor =(Double_t)fieldPointer-> SolenoidField()/10/.2;
63 fFieldFactor = fieldfactor;
a3894645 64 //cout<< " field factor = "<<fFieldFactor<<"\n"; getchar();
65
66/////////////////////////////////////////////////////////////////////////////////////////////////////////
67
aecdf013 68}
69
70
71
72AliITSTrackV1::AliITSTrackV1(const AliITSTrackV1 &cobj) {
73//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
74// copy constructor
75
76 fClusterInTrack = new TMatrix(6,9);
b7a35fb7 77 Int_t i,j;
b7a35fb7 78 for(i=0; i<6; i++){
64ab0d55 79 for(j=0; j<9; j++) (*fClusterInTrack)(i,j)=-1.;
b7a35fb7 80 }
aecdf013 81 flistCluster = new TObjArray;
82 fVertex.ResizeTo(3);
83 fErrorVertex.ResizeTo(3);
84 fVertex = cobj.fVertex;
85 fErrorVertex = cobj.fErrorVertex;
86 flabel = cobj.flabel;
87 fLayer=cobj.fLayer;
88 fTPCtrack = cobj.fTPCtrack;
89 fNumClustInTrack = cobj.fNumClustInTrack;
90 fChi2= cobj.fChi2;
91 fX0=cobj.fX0; fX1=cobj.fX1; fX2=cobj.fX2; fX3=cobj.fX3; fX4=cobj.fX4;
92 frtrack=cobj.frtrack;
93 fDv=cobj.fDv;
94 fZv=cobj.fZv;
95 fsigmaDv=cobj.fsigmaDv;
96 fsigmaZv=cobj.fsigmaZv;
97 fd2.ResizeTo(6);
98 ftgl2.ResizeTo(6);
99 fdtgl.ResizeTo(6);
100 fd2=cobj.fd2;
101 ftgl2=cobj.ftgl2;
102 fdtgl=cobj.fdtgl;
70a9314b 103 fnoclust=cobj.fnoclust;
aecdf013 104
105 fC00=cobj.fC00; fC10=cobj.fC10; fC11=cobj.fC11; fC20=cobj.fC20; fC21=cobj.fC21;
106 fC22=cobj.fC22; fC30=cobj.fC30; fC31=cobj.fC31; fC32=cobj.fC32; fC33=cobj.fC33;
107 fC40=cobj.fC40; fC41=cobj.fC41; fC42=cobj.fC42; fC43=cobj.fC43; fC44=cobj.fC44;
108
109 *fClusterInTrack = *cobj.fClusterInTrack;
a3894645 110
111 fFieldFactor=cobj.fFieldFactor;
61231d74 112 fMass=cobj.fMass;
113
aecdf013 114 for(i=0; i<cobj.flistCluster->GetSize(); i++)
115 flistCluster->AddLast(cobj.flistCluster->At(i));
116
117}
118
af50998a 119AliITSTrackV1::AliITSTrackV1(AliTPCtrack &obj, Double_t fieldfactor)
aecdf013 120{
121//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
122// special constructor to convert a TPC track into an ITS track
123
a3894645 124//////////////////////////////////////// gets magnetic field factor ////////////////////////////////
125
af50998a 126 // AliMagF * fieldPointer = gAlice->Field();
127 // fFieldFactor =(Double_t)fieldPointer-> SolenoidField()/10/.2;
128 fFieldFactor = fieldfactor;
129 // cout<< " field factor dentro alitrack = "<<fFieldFactor<<"\n";/* getchar();*/
a3894645 130
131/////////////////////////////////////////////////////////////////////////////////////////////////////////
132
133
aecdf013 134 fTPCtrack = &obj;
135 fVertex.ResizeTo(3);
136 fErrorVertex.ResizeTo(3);
137
138 fd2.ResizeTo(6);
139 ftgl2.ResizeTo(6);
140 fdtgl.ResizeTo(6);
141 AliGenerator *gener = gAlice->Generator();
142 Float_t vxg,vyg,vzg;
143 gener->GetOrigin(vxg,vyg,vzg);
144
145
146 fVertex(0)=(Double_t)vxg;
147 fVertex(1)=(Double_t)vyg;
148 fVertex(2)=(Double_t)vzg;
149
150 fLayer = 7;
aecdf013 151 fClusterInTrack = new TMatrix(6,9);
152
b7a35fb7 153 Int_t i,j;
b7a35fb7 154 for(i=0; i<6; i++){
64ab0d55 155 for(j=0; j<9; j++) (*fClusterInTrack)(i,j)=-1.;
b7a35fb7 156 }
aecdf013 157 flistCluster = new TObjArray;
70a9314b 158 fNumClustInTrack = 0;
159 fnoclust=0;
aecdf013 160 LmTPC();
161
162}
163
164
165AliITSTrackV1::~AliITSTrackV1() {
166//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
167//destructor
168
e73fe7f3 169 if(flistCluster) {
170 flistCluster->Delete();
171 delete flistCluster;
172 }
aecdf013 173 if(fClusterInTrack) delete fClusterInTrack;
174
175}
176
177void AliITSTrackV1::PutCElements(Double_t C00, Double_t C10, Double_t C11, Double_t C20, Double_t C21,
178Double_t C22, Double_t C30, Double_t C31, Double_t C32, Double_t C33, Double_t C40,
179Double_t C41, Double_t C42, Double_t C43, Double_t C44){
180//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
181// puts elements of covariance matrix
182
183 fC00=C00; fC10=C10; fC11=C11; fC20=C20; fC21=C21; fC22=C22; fC30=C30; fC31=C31; fC32=C32; fC33=C33;
184 fC40=C40; fC41=C41; fC42=C42; fC43=C43; fC44=C44;
185}
186
187void AliITSTrackV1::GetCElements(Double_t &C00, Double_t &C10, Double_t &C11, Double_t &C20, Double_t &C21,
188Double_t &C22, Double_t &C30, Double_t &C31, Double_t &C32, Double_t &C33, Double_t &C40,
189Double_t &C41, Double_t &C42, Double_t &C43, Double_t &C44) const {
190//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
191// gets elements of covariance matrix
192
193
194 C00=fC00; C10=fC10; C11=fC11; C20=fC20; C21=fC21; C22=fC22; C30=fC30; C31=fC31; C32=fC32; C33=fC33;
195 C40=fC40; C41=fC41; C42=fC42; C43=fC43; C44=fC44;
196
197}
198
199void AliITSTrackV1::GetXElements(Double_t &X0, Double_t &X1, Double_t &X2, Double_t &X3, Double_t &X4) const {
200//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
201// gets the elements of the state vector
202 X0=fX0; X1=fX1; X2=fX2; X3=fX3; X4=fX4;
203}
204
205void AliITSTrackV1::PutXElements(Double_t X0, Double_t X1, Double_t X2, Double_t X3, Double_t X4){
206//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
207// puts the elements of the state vector
208 fX0=X0; fX1=X1; fX2=X2; fX3=X3; fX4=X4;
209}
210
211void AliITSTrackV1::LmTPC() {
212//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
213// Transform the TPC state vector from TPC-local to master and build a new state vector ITS-type
214// The covariance matrix is also modified accordingly
215
216
217 Double_t alpha = fTPCtrack->GetAlpha();
218
219 //printf("LmTPC: alpha %f\n",alpha);
220
221 Double_t yTPC = fTPCtrack->GetY();
222 Double_t zTPC = fTPCtrack->GetZ();
223 Double_t cTPC = fTPCtrack->GetC();
224 Double_t etaTPC = fTPCtrack->GetEta();
225 Double_t tglTPC = fTPCtrack->GetTgl();
226
227
228 Double_t xm, ym, zm;
229 Double_t sina = TMath::Sin(alpha);
230 Double_t cosa = TMath::Cos(alpha);
231 Double_t xl= fTPCtrack->GetX();
232 xm = xl * cosa - yTPC*sina;
233 ym = xl * sina + yTPC*cosa;
234 zm = zTPC;
235 //cout<<" xl e alpha = "<<xl<<" "<<alpha<<"\n"; getchar();
236
237 Double_t x0m,y0m;
238
239 ///////////////////////////////////// determine yo //////////////////////////////////////////////////
240
241 Double_t vxl=fVertex(0)*cosa+fVertex(1)*sina;
242 Double_t vyl= -fVertex(0)*sina+fVertex(1)*cosa;
243 Double_t xo,yo, signy;
244 Double_t r = 1./cTPC;
245 xo = etaTPC / cTPC;
aecdf013 246 Double_t yo1, yo2, diffsq1, diffsq2;
247 yo1 = yTPC + TMath::Sqrt(r*r - (xl-xo)*(xl-xo));
248 yo2 = yTPC - TMath::Sqrt(r*r - (xl-xo)*(xl-xo));
249 diffsq1=TMath::Abs((yo1-vyl)*(yo1-vyl)+(xo-vxl)*(xo-vxl)-r*r);
250 diffsq2=TMath::Abs((yo2-vyl)*(yo2- vyl)+(xo-vxl)*(xo-vxl)-r*r);
251 if(diffsq1<diffsq2) {yo=yo1; signy=1.;} else {yo=yo2; signy=-1.;};
252
253 ////////////////////////////////////////////////////////////////////////////////////////////////////
254
255 x0m = xo * cosa - yo * sina;
256 y0m = xo * sina + yo * cosa;
257
258 frtrack=TMath::Sqrt(xm*xm+ym*ym);
70a9314b 259
61231d74 260 Double_t phi=TMath::ATan2(ym,xm); if(phi<0) phi=2.*TMath::Pi()+phi;
aecdf013 261
262 fX0=phi;
263 fX1=zm;
264 fX3=tglTPC;
265 fX4=cTPC;
266
267
268 Double_t dd=TMath::Sqrt((x0m-fVertex(0))*(x0m-fVertex(0))+(y0m-fVertex(1))*(y0m-fVertex(1)));
269 Double_t signdd;
270 if (r>0) signdd=1.; else signdd=-1.;
271 fX2=signdd*dd-r;
272 //cout<<" fvertex = "<<fVertex(0)<<" "<<fVertex(1)<<" "<<fVertex(2)<<"\n";
273
274 Double_t cov[15];
275 fTPCtrack->GetCovariance(cov);
276
277 Double_t dfidy, dDdy, dDdC, dDdeta;
278
279 dfidy=(xm*cosa+ym*sina)/(frtrack*frtrack);
280 dDdy=signdd*((y0m-fVertex(1))*cosa-(x0m-fVertex(0))*sina)/dd;
281 Double_t dyodr=signy*(r+(xl-xo)*etaTPC)/TMath::Sqrt(r*r-(xl-xo)*(xl-xo));
282 Double_t dyomdr=sina*etaTPC+cosa*dyodr;
283 Double_t dxomdr=cosa*etaTPC-sina*dyodr;
284 Double_t ddddR=((x0m-fVertex(0))*dxomdr+(y0m-fVertex(1))*dyomdr)/dd;
285 dDdC=-r*r*(signdd*ddddR-1.);
286 Double_t dyoldxol=signy*(xl-xo)/TMath::Sqrt(r*r-(xl-xo)*(xl-xo));
287 Double_t dxomdeta=r*(cosa-sina*dyoldxol);
288 Double_t dyomdeta=r*(sina+cosa*dyoldxol);
289 dDdeta=signdd*((x0m-fVertex(0))*dxomdeta+(y0m-fVertex(1))*dyomdeta)/dd;
290
291 Double_t f00=dfidy;
292 Double_t f20=dDdy;
293 Double_t f22=dDdC;
294 Double_t f23=dDdeta;
295
296 Double_t t00=cov[0]*f00;
297 Double_t t02=cov[0]*f20+cov[6]*f22+cov[3]*f23;
298 Double_t t20=cov[6]*f00;
299 Double_t t22=cov[6]*f20+cov[9]*f22+cov[8]*f23;
300
301 fC00=f00*t00;
302 fC10=cov[1]*f00;
303 fC11=cov[2];
304 fC20=f20*t00+f22*t20+f23*cov[3]*f00;
305 fC21=f20*cov[1]+f22*cov[7]+f23*cov[4];
306 fC22=f20*t02+f22*t22+f23*(cov[3]*f20+cov[8]*f22+cov[5]*f23);
307 fC30=cov[10]*f00;
308 fC31=cov[11];
309 fC32=cov[10]*f20+cov[13]*f22+cov[12]*f23;
310 fC33=cov[14];
311 fC40=t20;
312 fC41=cov[7];
313 fC42=t22;
314 fC43=cov[13];
315 fC44=cov[9];
316
aecdf013 317
318}
319
320
321AliITSTrackV1 &AliITSTrackV1::operator=(AliITSTrackV1 obj) {
322//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
323// assignement operator
324
e73fe7f3 325 if (flistCluster) {
326 flistCluster->Delete();
327 delete flistCluster;
328 }
aecdf013 329 delete fClusterInTrack;
330 fClusterInTrack = new TMatrix(6,9);
331 flistCluster = new TObjArray;
332 flabel = obj.flabel;
333 fTPCtrack = obj.fTPCtrack;
334 fNumClustInTrack = obj.fNumClustInTrack;
335 fChi2= obj.fChi2;
336 fVertex=obj.fVertex;
337 fErrorVertex=obj.fErrorVertex;
338 fX0=obj.fX0; fX1=obj.fX1; fX2=obj.fX2; fX3=obj.fX3; fX4=obj.fX4;
339 fLayer=obj.fLayer;
340 frtrack=obj.frtrack;
341 fDv=obj.fDv;
342 fZv=obj.fZv;
343 fsigmaDv=obj.fsigmaDv;
344 fsigmaZv=obj.fsigmaZv;
345 fd2=obj.fd2;
346 ftgl2=obj.ftgl2;
70a9314b 347 fdtgl=obj.fdtgl;
348 fnoclust=obj.fnoclust;
aecdf013 349
350 fC00=obj.fC00; fC10=obj.fC10; fC11=obj.fC11; fC20=obj.fC20; fC21=obj.fC21;
351 fC22=obj.fC22; fC30=obj.fC30; fC31=obj.fC31; fC32=obj.fC32; fC33=obj.fC33;
61231d74 352 fC40=obj.fC40; fC41=obj.fC41; fC42=obj.fC42; fC43=obj.fC43; fC44=obj.fC44;
353
354 fMass=obj.fMass;
aecdf013 355
356 *fClusterInTrack = *obj.fClusterInTrack;
357 Int_t i;
358 for(i=0; i<obj.flistCluster->GetSize(); i++) flistCluster->AddLast(obj.flistCluster->At(i));
359
360 return *this;
361
362}
363
364void AliITSTrackV1::PutCluster(Int_t layerc, TVector vecclust) {
365//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
366// put information for clusters
367
368 (*fClusterInTrack)(layerc,0) = vecclust(0);
369 (*fClusterInTrack)(layerc,1) = vecclust(1);
370 (*fClusterInTrack)(layerc,2) = vecclust(2);
371 (*fClusterInTrack)(layerc,3) = vecclust(3);
372 (*fClusterInTrack)(layerc,4) = vecclust(4);
373 (*fClusterInTrack)(layerc,5) = vecclust(5);
374 (*fClusterInTrack)(layerc,6) = vecclust(6);
375 (*fClusterInTrack)(layerc,7) = vecclust(7);
376 (*fClusterInTrack)(layerc,8) = vecclust(8);
377
378}
379
380
381void AliITSTrackV1::GetClusters() {
382//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
383// prints the clusters belonging to the current track
384
385 TMatrix a(*fClusterInTrack);
386 TMatrix b(6,3);
387 Int_t i;
388 for(i=0;i<6; i++){
389 b(i,0)=a(i,6); b(i,1)=a(i,7); b(i,2)=a(i,8);
390 }
391 a.Print();
392 // b.Print();
393
394}
395
396
397TVector AliITSTrackV1::GetLabTrack(Int_t lay) {
398//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
399// gets the label of the track
400
401 TVector vecLabel(3);
402 vecLabel(0)=( (Float_t) (*fClusterInTrack)(lay,6) );
403 vecLabel(1)=( (Float_t) (*fClusterInTrack)(lay,7) );
404 vecLabel(2)=( (Float_t) (*fClusterInTrack)(lay,8) );
405 return vecLabel;
406}
407
408void AliITSTrackV1::Search(TVector VecTotLabref, Long_t &labref, Int_t &freq){
409//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
410// define label
411
412 Int_t vecfreq[18];
413
414 Int_t i,j;
415 for(i=0; i<18; i++) vecfreq[i]=0;
416
417 for(i=0; i<18; i++) {
418 for(j=0; j<18; j++) {
419 // if(VecTotLabref(i) == 0.) VecTotLabref(i)=-3.; //commentato il 5-3-2001
420 if( (VecTotLabref(i)>=0.) && (VecTotLabref(i)==VecTotLabref(j)) ) vecfreq[i]++;
421 }
422 }
423 Int_t imax=-1000;
424 Long_t labdefault= (Long_t)1000000.;
425 freq=0;
426 for(i=0; i<18; i++) {
427 if(vecfreq[i]>freq) {freq=vecfreq[i]; imax=i;}
428 }
429 if(imax<0) labref=labdefault; else labref=(Long_t) VecTotLabref(imax);
430}
431
432
433void AliITSTrackV1::Propagation(Double_t rk) {
434//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
435//Propagation of track
436 Double_t duepi=2.*TMath::Pi();
437 Double_t rkm1=frtrack;
438//cout<<" rk e rkm1 dentro Propagation "<<rk<<" "<<rkm1<<"\n";
439
440 //
441 Double_t aAk=ArgA(rk), aAkm1=ArgA(rkm1);
442 Double_t ak=Arga(rk), akm1=Arga(rkm1);
443 fX0+=TMath::ASin(aAk)-TMath::ASin(aAkm1);
444
445 if(fX0>duepi) fX0-=duepi;
446 if(fX0<0.) fX0+=duepi;
447
448 Double_t tgl=fX3;
449 Double_t c=fX4;
450 Double_t d=fX2;
451 Double_t cy=c/2;
452 fX1+=tgl/cy*(TMath::ASin(ak)-TMath::ASin(akm1));
453 frtrack=rk;
454
455
456 Double_t bk=ArgB(rk), bkm1=ArgB(rkm1);
457 Double_t ck=ArgC(rk), ckm1=ArgC(rkm1);
458
459 Double_t f02=ck/TMath::Sqrt(1.-aAk*aAk) - ckm1/TMath::Sqrt(1.-aAkm1*aAkm1);
460 Double_t f04=bk/TMath::Sqrt(1.-aAk*aAk) - bkm1/TMath::Sqrt(1.-aAkm1*aAkm1);
461 Double_t f12=tgl*d*(1./rk - 1./rkm1);
462 Double_t f13=rk - rkm1;
463
464
465 Double_t c00=fC00;
466 Double_t c10=fC10;
467 Double_t c11=fC11;
468 Double_t c20=fC20;
469 Double_t c21=fC21;
470 Double_t c22=fC22;
471 Double_t c30=fC30;
472 Double_t c31=fC31;
473 Double_t c32=fC32;
474 Double_t c33=fC33;
475 Double_t c40=fC40;
476 Double_t c41=fC41;
477 Double_t c42=fC42;
478 Double_t c43=fC43;
479 Double_t c44=fC44;
480
481 Double_t r10=c10+c21*f02+c41*f04;
482 Double_t r20=c20+c22*f02+c42*f04;
483 Double_t r30=c30+c32*f02+c43*f04;
484 Double_t r40=c40+c42*f02+c44*f04;
485 Double_t r21=c21+c22*f12+c32*f13;
486 Double_t r31=c31+c32*f12+c33*f13;
487 Double_t r41=c41+c42*f12+c43*f13;
488
489 fC00=c00+c20*f02+c40*f04+f02*r20+f04*r40;
490 fC10=r10+f12*r20+f13*r30;
491 fC11=c11+c21*f12+c31*f13+f12*r21+f13*r31;
492 fC20=r20;
493 fC21=r21;
494 fC30=r30;
495 fC31=r31;
496 fC40=r40;
497 fC41=r41;
498
499}
500
501void AliITSTrackV1::AddEL(AliITSRad *rl, Double_t signdE, Bool_t flagtot, Double_t mass) {
502//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
503// add energy loss
504
61231d74 505 mass=fMass;
506
aecdf013 507 TVector s(6);
508 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;
509 //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;
510 //0.00277 is added in the first layer to take into account the energy loss in the beam pipe
511
512 //for(int k=0; k<6; k++) cout<<s(k)<<" "; cout<<"\n";
513 Int_t k;
70a9314b 514 //for(k=0; k<6; k++) s(k)=s(k)*1.6; //forint
515 for(k=0; k<6; k++) s(k)=s(k)*1.7; //forint
aecdf013 516
517 Double_t phi=fX0;
518
519 if(phi<0.174 ) s(5)=s(5)+0.012;
a3894645 520 if(phi>6.1 ) s(5)=s(5)+0.012; // to take into account rail
521 if(phi>2.96 && phi<3.31 ) s(5)=s(5)+0.012;
aecdf013 522
70a9314b 523 /*
aecdf013 524 Double_t tgl=fX3;
525 Double_t theta=((TMath::Pi())/2.)-TMath::ATan(tgl);
526 //phi*=180./TMath::Pi();
527 //theta*=180./TMath::Pi();
528 //Double_t rad90=(TMath::Pi())/2.;
529 Double_t rad40=(TMath::Pi())*40./180.;
530 Double_t rad100=(TMath::Pi())*100/180;
531 Double_t rad360=(TMath::Pi())*2.;
532 Int_t imax=rl->Getimax();
533 Int_t jmax=rl->Getjmax();
534 Int_t i=(Int_t) ( (theta-rad40)/rad100*imax);
535 Int_t j=(Int_t) ( phi/rad360*jmax );
536 //Int_t i=(Int_t)( ((theta-((TMath::Pi())/4.))/((TMath::Pi())/2.))*imax );
537 //Int_t j=(Int_t)( (phi/((TMath::Pi())*2.))*jmax );
538 if(i<0) i=0;
539 if(i>=imax) i=imax-1;
540 if(j<0) j=0;
541 if(j>=jmax) j=jmax-1;
70a9314b 542
aecdf013 543 s(0) = 0.0028/TMath::Sin(theta)+( rl->GetRadMatrix1() )(i,j); // 0.0028 takes into account the beam pipe
544 s(1) = ( rl->GetRadMatrix2() )(i,j);
545 s(2) = ( rl->GetRadMatrix3() )(i,j);
546 s(3) = ( rl->GetRadMatrix4() )(i,j);
547 s(4) = ( rl->GetRadMatrix5() )(i,j);
548 s(5) = ( rl->GetRadMatrix6() )(i,j);
549
550
551 */
552
553 //for(int k=0; k<6; k++) cout<<s(k)<<" "; getchar();
554
555 //if(phi>60) {cout<<" phi = "<<phi<<"\n"; getchar();}
556 //if(theta<45 || theta>135) {cout<<" theta = "<<theta<<"\n"; getchar();}
557 //cout<<" dentro AddEl: phi, theta = "<<phi<<" "<<theta<<"\n"; getchar();
558
70a9314b 559 Double_t cl=1.+fX3*fX3; // cl=1/(cosl)**2 = 1 + (tgl)**2
aecdf013 560 Double_t sqcl=TMath::Sqrt(cl);
561 Double_t pt=GetPt();
562
563 Double_t p2=pt*pt*cl;
564 Double_t e=TMath::Sqrt(p2+mass*mass);
565 Double_t beta2=p2/(p2+mass*mass);
566
567 Double_t dE;
568 if(flagtot) {
569 Double_t stot=s(0)+s(1)+s(2)+s(3)+s(4)+s(5);
570 dE=0.153/beta2*(log(5940*beta2/(1-beta2)) - beta2)*stot*21.82*sqcl;
571 } else {
572 dE=0.153/beta2*(log(5940*beta2/(1-beta2)) - beta2)*s(fLayer-1)*21.82*sqcl;
573 }
574 dE=signdE*dE/1000.;
575
576 e+=dE;
577 Double_t p=TMath::Sqrt(e*e-mass*mass);
578 Double_t sign=1.;
579 if(fX4 < 0.) sign=-1.;
580 pt=sign*p/sqcl;
a3894645 581 Double_t cc=(0.299792458*0.2*fFieldFactor)/(pt*100.);
aecdf013 582 fX4=cc;
583
584}
585
586void AliITSTrackV1::Correct(Double_t rk) {
587//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
588// correct track to take into account real geometry detector
589
590 Double_t duepi=2.*TMath::Pi();
591 Double_t rkm1=frtrack;
592 Double_t aAk=ArgA(rk), aAkm1=ArgA(rkm1);
593 Double_t ak=Arga(rk), akm1=Arga(rkm1);
594
595 fX0+=TMath::ASin(aAk)-TMath::ASin(aAkm1);
596 if(fX0>duepi) fX0-=duepi;
597 if(fX0<0.) fX0+=duepi;
598
599 Double_t tgl=fX3;
600 Double_t c=fX4;
601 Double_t cy=c/2;
602 fX1+=tgl/cy*(TMath::ASin(ak)-TMath::ASin(akm1));
603 frtrack=rk;
604
605}
606
70a9314b 607void AliITSTrackV1::AddMS(AliITSRad *rl, Double_t mass) {
aecdf013 608//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
609////////// Modification of the covariance matrix to take into account multiple scattering ///////////
610
61231d74 611 mass=fMass;
612
aecdf013 613 TVector s(6);
614
615 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;
616 // 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;
617//0.00277 is added in the first layer to take into account the energy loss in the beam pipe
618
619 Int_t k;
70a9314b 620 //for(k=0; k<6; k++) s(k)=s(k)*1.6; // forint
621 for(k=0; k<6; k++) s(k)=s(k)*1.7; // forint
aecdf013 622
623 Double_t phi=fX0;
624 if(phi<0.174 ) s(5)=s(5)+0.012; //aggiunta provvisoria
625 if(phi>6.1 ) s(5)=s(5)+0.012; //aggiunta provvisoria
626 if(phi>2.96 && phi< 3.31) s(5)=s(5)+0.012; //aggiunta provvisoria
70a9314b 627
aecdf013 628
629 Double_t tgl=fX3;
70a9314b 630 /*
aecdf013 631 Double_t theta=((TMath::Pi())/2.)-TMath::ATan(tgl);
632 Double_t rad40=(TMath::Pi())*40./180.; // rivedere
633 Double_t rad100=(TMath::Pi())*100/180;
634 Double_t rad360=(TMath::Pi())*2.;
635 Int_t imax=rl->Getimax();
636 Int_t jmax=rl->Getjmax();
637 Int_t i=(Int_t) ( (theta-rad40)/rad100*imax);
638 Int_t j=(Int_t) ( phi/rad360*jmax);
639
640 if(i<0) i=0;
641 if(i>=imax) i=imax-1;
642 if(j<0) j=0;
643 if(j>=jmax) j=jmax-1;
70a9314b 644
aecdf013 645 s(0) = 0.0028/TMath::Sin(theta)+( rl->GetRadMatrix1() )(i,j); // 0.0028 takes into account the beam pipe
646 s(1) = ( rl->GetRadMatrix2() )(i,j);
647 s(2) = ( rl->GetRadMatrix3() )(i,j);
648 s(3) = ( rl->GetRadMatrix4() )(i,j);
649 s(4) = ( rl->GetRadMatrix5() )(i,j);
650 s(5) = ( rl->GetRadMatrix6() )(i,j);
651 */
70a9314b 652 //Double_t mass=0.1396;
aecdf013 653 Int_t layer=(Int_t)GetLayer();
654
655 Double_t cosl=TMath::Cos(TMath::ATan(tgl));
656 Double_t d=fX2;
657 Double_t c=fX4;
658 Double_t cy=c/2.;
659 Double_t q20=1./(cosl*cosl);
660 Double_t q30=c*tgl;
661
662 Double_t q40=cy*(frtrack*frtrack-d*d)/(1.+ 2.*cy*d);
663 Double_t dd=d+cy*d*d-cy*frtrack*frtrack;
664 Double_t dprova=frtrack*frtrack - dd*dd;
665 Double_t q41=0.;
666 if(dprova>0.) q41=-1./cosl*TMath::Sqrt(dprova)/(1.+ 2.*cy*d);
667
668 Double_t p2=(GetPt()*GetPt())/(cosl*cosl);
669 Double_t beta2=p2/(p2+mass*mass);
61231d74 670 // Double_t theta2=14.1*14.1/(beta2*p2*1.e6)*(s(layer-1)/cosl);
671 Double_t theta2=14.1*14.1/(beta2*p2*1.e6)*(s(layer-1)/TMath::Abs(cosl));
aecdf013 672
673 fC22+=theta2*(q40*q40+q41*q41);
674 fC32+=theta2*q20*q40;
675 fC33+=theta2*q20*q20;
676 fC42+=theta2*q30*q40;
677 fC43+=theta2*q30*q20;
678 fC44+=theta2*q30*q30;
679
680}
681void AliITSTrackV1::PrimaryTrack(AliITSRad *rl) {
682//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
683// calculation of part of covariance matrix for vertex constraint
684
685 Double_t rlayer[6];
686
687 rlayer[0]=4.; rlayer[1]=7.; rlayer[2]=14.9; rlayer[3]=23.8;
688 rlayer[4]=39.1; rlayer[5]=43.6;
689
690 Double_t cy=fX4/2.;
691 Double_t tgl=(fX1-fZv)*cy/TMath::ASin(cy*frtrack);
692 Double_t frtrack=1.;
693 fX0=0.;
694 fX1=frtrack*tgl;
695 fX2=fDv;
696 fX3=tgl;
697
698 fC00=fC10=fC11=fC20=fC21=fC22=fC30=fC31=fC32=fC33=fC40=fC41=fC42=fC43=0.;
699
700 AddEL(rl,1.,1);
701 fLayer=0;
702 Int_t i;
703 for (i=0; i<6; i++) {
704 Propagation(rlayer[i]);
705 fLayer++;
706 fd2(i)=fC22;
707 ftgl2(i)=fC33;
708 fdtgl(i)=fC32;
709 AddMS(rl);
710 AddEL(rl,-1,0);
711 }
712}
713
714
715Int_t AliITSTrackV1::DoNotCross(Double_t rk) const{
716//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
717// determine if the track cross a layer
718
719 Double_t c=fX4;
720 Double_t d=fX2;
721 Double_t cy=c/2.;
722 return (TMath::Abs((cy*rk+(1.+cy*d)*d/rk)/(1.+2.*cy*d))>=1.)?1:0;
723}
724
725
726Double_t AliITSTrackV1::ArgA(Double_t rk) const {
727//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
728// quantity usefull in Propagation
729 Double_t c=fX4;
730 Double_t d=fX2;
731 Double_t cy=c/2.;
732 Double_t arg=(cy*rk + (1 + cy*d)*d/rk)/(1.+ 2.*cy*d);
733 if (TMath::Abs(arg) < 1.) return arg;
734 //cout<<"class AliITSTrack: ArgA out of range !\n";/* getchar();*/
735 return (arg>0) ? 0.99999999999 : -0.9999999999;
736}
737
738Double_t AliITSTrackV1::Arga(Double_t rk) const {
739//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
740// quantity usefull in Propagation
741 Double_t c=fX4;
742 Double_t d=fX2;
743 Double_t cy=c/2.;
744 Double_t arg=(rk*rk - d*d)/(1.+ 2.*cy*d);
745 if (arg<0.) {/*cout<<"class AliITSTrack: Arga out of range !\n";*/ arg=0.;}
746 return cy*TMath::Sqrt(arg);
747}
748
749Double_t AliITSTrackV1::ArgB(Double_t rk) const {
750//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
751// quantity usefull in Propagation
752 Double_t c=fX4;
753 Double_t d=fX2;
754 Double_t cy=c/2.;
755 return (rk*rk - d*d)/(rk*(1.+ 2.*cy*d)*(1.+ 2.*cy*d));
756}
757
758Double_t AliITSTrackV1::ArgC(Double_t rk) const {
759//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
760// quantity usefull in Propagation
761 Double_t c=fX4;
762 Double_t d=fX2;
763 Double_t cy=c/2.;
764 return (1./rk - 2.*cy*ArgA(rk)/(1.+ 2.*cy*d));
765}
766
767
70a9314b 768Double_t AliITSTrackV1::GetPredChi2(Double_t m[2], Double_t sigma[2] ) const {
769//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
770// This function calculates a predicted chi2 increment.
64ab0d55 771
70a9314b 772 Double_t r00=sigma[0], r01=0., r11=sigma[1];
773 r00+=fC00; r01+=fC10; r11+=fC11;
774 Double_t det=r00*r11-r01*r01;
775 if(TMath::Abs(det) < 1.e-15) {cout<<" Problems on matrix in GetPredChi2 "<<det<<"\n";
776 return 1e10;}
777 Double_t tmp=r00; r00=r11; r11=tmp; r01=-r01;
778 Double_t dphi=m[0]-fX0;
779 Double_t dz=m[1]-fX1;
780 Double_t chi2 = (dphi*r00*dphi +2.*r01*dphi*dz + dz*r11*dz)/det;
781 return chi2;
782
70a9314b 783}