]> 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
AliGenSTRANGElib.cxx first commit.
[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//
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
55cd883f 24 fTPCtrack = 0;
aecdf013 25 fC00=fC10=fC11=fC20=fC21=fC22=fC30=fC31=fC32=fC33=fC40=fC41=fC42=fC43=fC44=0.;
cf411bb5 26 flistCluster = 0;
aecdf013 27 fNumClustInTrack =0;
28 fChi2=-1;
29 flabel =0;
30 fVertex.ResizeTo(3);
31 fErrorVertex.ResizeTo(3);
32 fLayer = -1;
cf411bb5 33 fClusterInTrack = 0;
70a9314b 34 frtrack=0.;
35 fnoclust=0;
aecdf013 36 fd2.ResizeTo(6);
37 ftgl2.ResizeTo(6);
a3894645 38 fdtgl.ResizeTo(6);
61231d74 39 fMass=0.13956995; //a pion by default
a3894645 40
41//////////////////////////////////////// gets magnetic field factor ////////////////////////////////
42
43 AliMagF * fieldPointer = gAlice->Field();
44 fFieldFactor = (Double_t)fieldPointer->Factor();
45 //cout<< " field factor = "<<fFieldFactor<<"\n"; getchar();
46
47/////////////////////////////////////////////////////////////////////////////////////////////////////////
48
aecdf013 49}
50
51
52
53AliITSTrackV1::AliITSTrackV1(const AliITSTrackV1 &cobj) {
54//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
55// copy constructor
56
57 fClusterInTrack = new TMatrix(6,9);
b7a35fb7 58 Int_t i,j;
b7a35fb7 59 for(i=0; i<6; i++){
64ab0d55 60 for(j=0; j<9; j++) (*fClusterInTrack)(i,j)=-1.;
b7a35fb7 61 }
aecdf013 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;
61231d74 93 fMass=cobj.fMass;
94
aecdf013 95 for(i=0; i<cobj.flistCluster->GetSize(); i++)
96 flistCluster->AddLast(cobj.flistCluster->At(i));
97
98}
99
100AliITSTrackV1::AliITSTrackV1(AliTPCtrack &obj)
101{
102//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
103// special constructor to convert a TPC track into an ITS track
104
a3894645 105//////////////////////////////////////// gets magnetic field factor ////////////////////////////////
106
107 AliMagF * fieldPointer = gAlice->Field();
108 fFieldFactor = (Double_t)fieldPointer->Factor();
109 //cout<< " field factor = "<<fFieldFactor<<"\n"; getchar();
110
111/////////////////////////////////////////////////////////////////////////////////////////////////////////
112
113
aecdf013 114 fTPCtrack = &obj;
115 fVertex.ResizeTo(3);
116 fErrorVertex.ResizeTo(3);
117
118 fd2.ResizeTo(6);
119 ftgl2.ResizeTo(6);
120 fdtgl.ResizeTo(6);
121 AliGenerator *gener = gAlice->Generator();
122 Float_t vxg,vyg,vzg;
123 gener->GetOrigin(vxg,vyg,vzg);
124
125
126 fVertex(0)=(Double_t)vxg;
127 fVertex(1)=(Double_t)vyg;
128 fVertex(2)=(Double_t)vzg;
129
130 fLayer = 7;
aecdf013 131 fClusterInTrack = new TMatrix(6,9);
132
b7a35fb7 133 Int_t i,j;
b7a35fb7 134 for(i=0; i<6; i++){
64ab0d55 135 for(j=0; j<9; j++) (*fClusterInTrack)(i,j)=-1.;
b7a35fb7 136 }
aecdf013 137 flistCluster = new TObjArray;
70a9314b 138 fNumClustInTrack = 0;
139 fnoclust=0;
aecdf013 140 LmTPC();
141
142}
143
144
145AliITSTrackV1::~AliITSTrackV1() {
146//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
147//destructor
148
e73fe7f3 149 if(flistCluster) {
150 flistCluster->Delete();
151 delete flistCluster;
152 }
aecdf013 153 if(fClusterInTrack) delete fClusterInTrack;
154
155}
156
157void AliITSTrackV1::PutCElements(Double_t C00, Double_t C10, Double_t C11, Double_t C20, Double_t C21,
158Double_t C22, Double_t C30, Double_t C31, Double_t C32, Double_t C33, Double_t C40,
159Double_t C41, Double_t C42, Double_t C43, Double_t C44){
160//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
161// puts elements of covariance matrix
162
163 fC00=C00; fC10=C10; fC11=C11; fC20=C20; fC21=C21; fC22=C22; fC30=C30; fC31=C31; fC32=C32; fC33=C33;
164 fC40=C40; fC41=C41; fC42=C42; fC43=C43; fC44=C44;
165}
166
167void AliITSTrackV1::GetCElements(Double_t &C00, Double_t &C10, Double_t &C11, Double_t &C20, Double_t &C21,
168Double_t &C22, Double_t &C30, Double_t &C31, Double_t &C32, Double_t &C33, Double_t &C40,
169Double_t &C41, Double_t &C42, Double_t &C43, Double_t &C44) const {
170//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
171// gets elements of covariance matrix
172
173
174 C00=fC00; C10=fC10; C11=fC11; C20=fC20; C21=fC21; C22=fC22; C30=fC30; C31=fC31; C32=fC32; C33=fC33;
175 C40=fC40; C41=fC41; C42=fC42; C43=fC43; C44=fC44;
176
177}
178
179void AliITSTrackV1::GetXElements(Double_t &X0, Double_t &X1, Double_t &X2, Double_t &X3, Double_t &X4) const {
180//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
181// gets the elements of the state vector
182 X0=fX0; X1=fX1; X2=fX2; X3=fX3; X4=fX4;
183}
184
185void AliITSTrackV1::PutXElements(Double_t X0, Double_t X1, Double_t X2, Double_t X3, Double_t X4){
186//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
187// puts the elements of the state vector
188 fX0=X0; fX1=X1; fX2=X2; fX3=X3; fX4=X4;
189}
190
191void AliITSTrackV1::LmTPC() {
192//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
193// Transform the TPC state vector from TPC-local to master and build a new state vector ITS-type
194// The covariance matrix is also modified accordingly
195
196
197 Double_t alpha = fTPCtrack->GetAlpha();
198
199 //printf("LmTPC: alpha %f\n",alpha);
200
201 Double_t yTPC = fTPCtrack->GetY();
202 Double_t zTPC = fTPCtrack->GetZ();
203 Double_t cTPC = fTPCtrack->GetC();
204 Double_t etaTPC = fTPCtrack->GetEta();
205 Double_t tglTPC = fTPCtrack->GetTgl();
206
207
208 Double_t xm, ym, zm;
209 Double_t sina = TMath::Sin(alpha);
210 Double_t cosa = TMath::Cos(alpha);
211 Double_t xl= fTPCtrack->GetX();
212 xm = xl * cosa - yTPC*sina;
213 ym = xl * sina + yTPC*cosa;
214 zm = zTPC;
215 //cout<<" xl e alpha = "<<xl<<" "<<alpha<<"\n"; getchar();
216
217 Double_t x0m,y0m;
218
219 ///////////////////////////////////// determine yo //////////////////////////////////////////////////
220
221 Double_t vxl=fVertex(0)*cosa+fVertex(1)*sina;
222 Double_t vyl= -fVertex(0)*sina+fVertex(1)*cosa;
223 Double_t xo,yo, signy;
224 Double_t r = 1./cTPC;
225 xo = etaTPC / cTPC;
aecdf013 226 Double_t yo1, yo2, diffsq1, diffsq2;
227 yo1 = yTPC + TMath::Sqrt(r*r - (xl-xo)*(xl-xo));
228 yo2 = yTPC - TMath::Sqrt(r*r - (xl-xo)*(xl-xo));
229 diffsq1=TMath::Abs((yo1-vyl)*(yo1-vyl)+(xo-vxl)*(xo-vxl)-r*r);
230 diffsq2=TMath::Abs((yo2-vyl)*(yo2- vyl)+(xo-vxl)*(xo-vxl)-r*r);
231 if(diffsq1<diffsq2) {yo=yo1; signy=1.;} else {yo=yo2; signy=-1.;};
232
233 ////////////////////////////////////////////////////////////////////////////////////////////////////
234
235 x0m = xo * cosa - yo * sina;
236 y0m = xo * sina + yo * cosa;
237
238 frtrack=TMath::Sqrt(xm*xm+ym*ym);
70a9314b 239
61231d74 240 Double_t phi=TMath::ATan2(ym,xm); if(phi<0) phi=2.*TMath::Pi()+phi;
aecdf013 241
242 fX0=phi;
243 fX1=zm;
244 fX3=tglTPC;
245 fX4=cTPC;
246
247
248 Double_t dd=TMath::Sqrt((x0m-fVertex(0))*(x0m-fVertex(0))+(y0m-fVertex(1))*(y0m-fVertex(1)));
249 Double_t signdd;
250 if (r>0) signdd=1.; else signdd=-1.;
251 fX2=signdd*dd-r;
252 //cout<<" fvertex = "<<fVertex(0)<<" "<<fVertex(1)<<" "<<fVertex(2)<<"\n";
253
254 Double_t cov[15];
255 fTPCtrack->GetCovariance(cov);
256
257 Double_t dfidy, dDdy, dDdC, dDdeta;
258
259 dfidy=(xm*cosa+ym*sina)/(frtrack*frtrack);
260 dDdy=signdd*((y0m-fVertex(1))*cosa-(x0m-fVertex(0))*sina)/dd;
261 Double_t dyodr=signy*(r+(xl-xo)*etaTPC)/TMath::Sqrt(r*r-(xl-xo)*(xl-xo));
262 Double_t dyomdr=sina*etaTPC+cosa*dyodr;
263 Double_t dxomdr=cosa*etaTPC-sina*dyodr;
264 Double_t ddddR=((x0m-fVertex(0))*dxomdr+(y0m-fVertex(1))*dyomdr)/dd;
265 dDdC=-r*r*(signdd*ddddR-1.);
266 Double_t dyoldxol=signy*(xl-xo)/TMath::Sqrt(r*r-(xl-xo)*(xl-xo));
267 Double_t dxomdeta=r*(cosa-sina*dyoldxol);
268 Double_t dyomdeta=r*(sina+cosa*dyoldxol);
269 dDdeta=signdd*((x0m-fVertex(0))*dxomdeta+(y0m-fVertex(1))*dyomdeta)/dd;
270
271 Double_t f00=dfidy;
272 Double_t f20=dDdy;
273 Double_t f22=dDdC;
274 Double_t f23=dDdeta;
275
276 Double_t t00=cov[0]*f00;
277 Double_t t02=cov[0]*f20+cov[6]*f22+cov[3]*f23;
278 Double_t t20=cov[6]*f00;
279 Double_t t22=cov[6]*f20+cov[9]*f22+cov[8]*f23;
280
281 fC00=f00*t00;
282 fC10=cov[1]*f00;
283 fC11=cov[2];
284 fC20=f20*t00+f22*t20+f23*cov[3]*f00;
285 fC21=f20*cov[1]+f22*cov[7]+f23*cov[4];
286 fC22=f20*t02+f22*t22+f23*(cov[3]*f20+cov[8]*f22+cov[5]*f23);
287 fC30=cov[10]*f00;
288 fC31=cov[11];
289 fC32=cov[10]*f20+cov[13]*f22+cov[12]*f23;
290 fC33=cov[14];
291 fC40=t20;
292 fC41=cov[7];
293 fC42=t22;
294 fC43=cov[13];
295 fC44=cov[9];
296
aecdf013 297
298}
299
300
301AliITSTrackV1 &AliITSTrackV1::operator=(AliITSTrackV1 obj) {
302//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
303// assignement operator
304
e73fe7f3 305 if (flistCluster) {
306 flistCluster->Delete();
307 delete flistCluster;
308 }
aecdf013 309 delete fClusterInTrack;
310 fClusterInTrack = new TMatrix(6,9);
311 flistCluster = new TObjArray;
312 flabel = obj.flabel;
313 fTPCtrack = obj.fTPCtrack;
314 fNumClustInTrack = obj.fNumClustInTrack;
315 fChi2= obj.fChi2;
316 fVertex=obj.fVertex;
317 fErrorVertex=obj.fErrorVertex;
318 fX0=obj.fX0; fX1=obj.fX1; fX2=obj.fX2; fX3=obj.fX3; fX4=obj.fX4;
319 fLayer=obj.fLayer;
320 frtrack=obj.frtrack;
321 fDv=obj.fDv;
322 fZv=obj.fZv;
323 fsigmaDv=obj.fsigmaDv;
324 fsigmaZv=obj.fsigmaZv;
325 fd2=obj.fd2;
326 ftgl2=obj.ftgl2;
70a9314b 327 fdtgl=obj.fdtgl;
328 fnoclust=obj.fnoclust;
aecdf013 329
330 fC00=obj.fC00; fC10=obj.fC10; fC11=obj.fC11; fC20=obj.fC20; fC21=obj.fC21;
331 fC22=obj.fC22; fC30=obj.fC30; fC31=obj.fC31; fC32=obj.fC32; fC33=obj.fC33;
61231d74 332 fC40=obj.fC40; fC41=obj.fC41; fC42=obj.fC42; fC43=obj.fC43; fC44=obj.fC44;
333
334 fMass=obj.fMass;
aecdf013 335
336 *fClusterInTrack = *obj.fClusterInTrack;
337 Int_t i;
338 for(i=0; i<obj.flistCluster->GetSize(); i++) flistCluster->AddLast(obj.flistCluster->At(i));
339
340 return *this;
341
342}
343
344void AliITSTrackV1::PutCluster(Int_t layerc, TVector vecclust) {
345//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
346// put information for clusters
347
348 (*fClusterInTrack)(layerc,0) = vecclust(0);
349 (*fClusterInTrack)(layerc,1) = vecclust(1);
350 (*fClusterInTrack)(layerc,2) = vecclust(2);
351 (*fClusterInTrack)(layerc,3) = vecclust(3);
352 (*fClusterInTrack)(layerc,4) = vecclust(4);
353 (*fClusterInTrack)(layerc,5) = vecclust(5);
354 (*fClusterInTrack)(layerc,6) = vecclust(6);
355 (*fClusterInTrack)(layerc,7) = vecclust(7);
356 (*fClusterInTrack)(layerc,8) = vecclust(8);
357
358}
359
360
361void AliITSTrackV1::GetClusters() {
362//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
363// prints the clusters belonging to the current track
364
365 TMatrix a(*fClusterInTrack);
366 TMatrix b(6,3);
367 Int_t i;
368 for(i=0;i<6; i++){
369 b(i,0)=a(i,6); b(i,1)=a(i,7); b(i,2)=a(i,8);
370 }
371 a.Print();
372 // b.Print();
373
374}
375
376
377TVector AliITSTrackV1::GetLabTrack(Int_t lay) {
378//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
379// gets the label of the track
380
381 TVector vecLabel(3);
382 vecLabel(0)=( (Float_t) (*fClusterInTrack)(lay,6) );
383 vecLabel(1)=( (Float_t) (*fClusterInTrack)(lay,7) );
384 vecLabel(2)=( (Float_t) (*fClusterInTrack)(lay,8) );
385 return vecLabel;
386}
387
388void AliITSTrackV1::Search(TVector VecTotLabref, Long_t &labref, Int_t &freq){
389//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
390// define label
391
392 Int_t vecfreq[18];
393
394 Int_t i,j;
395 for(i=0; i<18; i++) vecfreq[i]=0;
396
397 for(i=0; i<18; i++) {
398 for(j=0; j<18; j++) {
399 // if(VecTotLabref(i) == 0.) VecTotLabref(i)=-3.; //commentato il 5-3-2001
400 if( (VecTotLabref(i)>=0.) && (VecTotLabref(i)==VecTotLabref(j)) ) vecfreq[i]++;
401 }
402 }
403 Int_t imax=-1000;
404 Long_t labdefault= (Long_t)1000000.;
405 freq=0;
406 for(i=0; i<18; i++) {
407 if(vecfreq[i]>freq) {freq=vecfreq[i]; imax=i;}
408 }
409 if(imax<0) labref=labdefault; else labref=(Long_t) VecTotLabref(imax);
410}
411
412
413void AliITSTrackV1::Propagation(Double_t rk) {
414//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
415//Propagation of track
416 Double_t duepi=2.*TMath::Pi();
417 Double_t rkm1=frtrack;
418//cout<<" rk e rkm1 dentro Propagation "<<rk<<" "<<rkm1<<"\n";
419
420 //
421 Double_t aAk=ArgA(rk), aAkm1=ArgA(rkm1);
422 Double_t ak=Arga(rk), akm1=Arga(rkm1);
423 fX0+=TMath::ASin(aAk)-TMath::ASin(aAkm1);
424
425 if(fX0>duepi) fX0-=duepi;
426 if(fX0<0.) fX0+=duepi;
427
428 Double_t tgl=fX3;
429 Double_t c=fX4;
430 Double_t d=fX2;
431 Double_t cy=c/2;
432 fX1+=tgl/cy*(TMath::ASin(ak)-TMath::ASin(akm1));
433 frtrack=rk;
434
435
436 Double_t bk=ArgB(rk), bkm1=ArgB(rkm1);
437 Double_t ck=ArgC(rk), ckm1=ArgC(rkm1);
438
439 Double_t f02=ck/TMath::Sqrt(1.-aAk*aAk) - ckm1/TMath::Sqrt(1.-aAkm1*aAkm1);
440 Double_t f04=bk/TMath::Sqrt(1.-aAk*aAk) - bkm1/TMath::Sqrt(1.-aAkm1*aAkm1);
441 Double_t f12=tgl*d*(1./rk - 1./rkm1);
442 Double_t f13=rk - rkm1;
443
444
445 Double_t c00=fC00;
446 Double_t c10=fC10;
447 Double_t c11=fC11;
448 Double_t c20=fC20;
449 Double_t c21=fC21;
450 Double_t c22=fC22;
451 Double_t c30=fC30;
452 Double_t c31=fC31;
453 Double_t c32=fC32;
454 Double_t c33=fC33;
455 Double_t c40=fC40;
456 Double_t c41=fC41;
457 Double_t c42=fC42;
458 Double_t c43=fC43;
459 Double_t c44=fC44;
460
461 Double_t r10=c10+c21*f02+c41*f04;
462 Double_t r20=c20+c22*f02+c42*f04;
463 Double_t r30=c30+c32*f02+c43*f04;
464 Double_t r40=c40+c42*f02+c44*f04;
465 Double_t r21=c21+c22*f12+c32*f13;
466 Double_t r31=c31+c32*f12+c33*f13;
467 Double_t r41=c41+c42*f12+c43*f13;
468
469 fC00=c00+c20*f02+c40*f04+f02*r20+f04*r40;
470 fC10=r10+f12*r20+f13*r30;
471 fC11=c11+c21*f12+c31*f13+f12*r21+f13*r31;
472 fC20=r20;
473 fC21=r21;
474 fC30=r30;
475 fC31=r31;
476 fC40=r40;
477 fC41=r41;
478
479}
480
481void AliITSTrackV1::AddEL(AliITSRad *rl, Double_t signdE, Bool_t flagtot, Double_t mass) {
482//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
483// add energy loss
484
61231d74 485 mass=fMass;
486
aecdf013 487 TVector s(6);
488 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;
489 //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;
490 //0.00277 is added in the first layer to take into account the energy loss in the beam pipe
491
492 //for(int k=0; k<6; k++) cout<<s(k)<<" "; cout<<"\n";
493 Int_t k;
70a9314b 494 //for(k=0; k<6; k++) s(k)=s(k)*1.6; //forint
495 for(k=0; k<6; k++) s(k)=s(k)*1.7; //forint
aecdf013 496
497 Double_t phi=fX0;
498
499 if(phi<0.174 ) s(5)=s(5)+0.012;
a3894645 500 if(phi>6.1 ) s(5)=s(5)+0.012; // to take into account rail
501 if(phi>2.96 && phi<3.31 ) s(5)=s(5)+0.012;
aecdf013 502
70a9314b 503 /*
aecdf013 504 Double_t tgl=fX3;
505 Double_t theta=((TMath::Pi())/2.)-TMath::ATan(tgl);
506 //phi*=180./TMath::Pi();
507 //theta*=180./TMath::Pi();
508 //Double_t rad90=(TMath::Pi())/2.;
509 Double_t rad40=(TMath::Pi())*40./180.;
510 Double_t rad100=(TMath::Pi())*100/180;
511 Double_t rad360=(TMath::Pi())*2.;
512 Int_t imax=rl->Getimax();
513 Int_t jmax=rl->Getjmax();
514 Int_t i=(Int_t) ( (theta-rad40)/rad100*imax);
515 Int_t j=(Int_t) ( phi/rad360*jmax );
516 //Int_t i=(Int_t)( ((theta-((TMath::Pi())/4.))/((TMath::Pi())/2.))*imax );
517 //Int_t j=(Int_t)( (phi/((TMath::Pi())*2.))*jmax );
518 if(i<0) i=0;
519 if(i>=imax) i=imax-1;
520 if(j<0) j=0;
521 if(j>=jmax) j=jmax-1;
70a9314b 522
aecdf013 523 s(0) = 0.0028/TMath::Sin(theta)+( rl->GetRadMatrix1() )(i,j); // 0.0028 takes into account the beam pipe
524 s(1) = ( rl->GetRadMatrix2() )(i,j);
525 s(2) = ( rl->GetRadMatrix3() )(i,j);
526 s(3) = ( rl->GetRadMatrix4() )(i,j);
527 s(4) = ( rl->GetRadMatrix5() )(i,j);
528 s(5) = ( rl->GetRadMatrix6() )(i,j);
529
530
531 */
532
533 //for(int k=0; k<6; k++) cout<<s(k)<<" "; getchar();
534
535 //if(phi>60) {cout<<" phi = "<<phi<<"\n"; getchar();}
536 //if(theta<45 || theta>135) {cout<<" theta = "<<theta<<"\n"; getchar();}
537 //cout<<" dentro AddEl: phi, theta = "<<phi<<" "<<theta<<"\n"; getchar();
538
70a9314b 539 Double_t cl=1.+fX3*fX3; // cl=1/(cosl)**2 = 1 + (tgl)**2
aecdf013 540 Double_t sqcl=TMath::Sqrt(cl);
541 Double_t pt=GetPt();
542
543 Double_t p2=pt*pt*cl;
544 Double_t e=TMath::Sqrt(p2+mass*mass);
545 Double_t beta2=p2/(p2+mass*mass);
546
547 Double_t dE;
548 if(flagtot) {
549 Double_t stot=s(0)+s(1)+s(2)+s(3)+s(4)+s(5);
550 dE=0.153/beta2*(log(5940*beta2/(1-beta2)) - beta2)*stot*21.82*sqcl;
551 } else {
552 dE=0.153/beta2*(log(5940*beta2/(1-beta2)) - beta2)*s(fLayer-1)*21.82*sqcl;
553 }
554 dE=signdE*dE/1000.;
555
556 e+=dE;
557 Double_t p=TMath::Sqrt(e*e-mass*mass);
558 Double_t sign=1.;
559 if(fX4 < 0.) sign=-1.;
560 pt=sign*p/sqcl;
a3894645 561 Double_t cc=(0.299792458*0.2*fFieldFactor)/(pt*100.);
aecdf013 562 fX4=cc;
563
564}
565
566void AliITSTrackV1::Correct(Double_t rk) {
567//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
568// correct track to take into account real geometry detector
569
570 Double_t duepi=2.*TMath::Pi();
571 Double_t rkm1=frtrack;
572 Double_t aAk=ArgA(rk), aAkm1=ArgA(rkm1);
573 Double_t ak=Arga(rk), akm1=Arga(rkm1);
574
575 fX0+=TMath::ASin(aAk)-TMath::ASin(aAkm1);
576 if(fX0>duepi) fX0-=duepi;
577 if(fX0<0.) fX0+=duepi;
578
579 Double_t tgl=fX3;
580 Double_t c=fX4;
581 Double_t cy=c/2;
582 fX1+=tgl/cy*(TMath::ASin(ak)-TMath::ASin(akm1));
583 frtrack=rk;
584
585}
586
70a9314b 587void AliITSTrackV1::AddMS(AliITSRad *rl, Double_t mass) {
aecdf013 588//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
589////////// Modification of the covariance matrix to take into account multiple scattering ///////////
590
61231d74 591 mass=fMass;
592
aecdf013 593 TVector s(6);
594
595 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;
596 // 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;
597//0.00277 is added in the first layer to take into account the energy loss in the beam pipe
598
599 Int_t k;
70a9314b 600 //for(k=0; k<6; k++) s(k)=s(k)*1.6; // forint
601 for(k=0; k<6; k++) s(k)=s(k)*1.7; // forint
aecdf013 602
603 Double_t phi=fX0;
604 if(phi<0.174 ) s(5)=s(5)+0.012; //aggiunta provvisoria
605 if(phi>6.1 ) s(5)=s(5)+0.012; //aggiunta provvisoria
606 if(phi>2.96 && phi< 3.31) s(5)=s(5)+0.012; //aggiunta provvisoria
70a9314b 607
aecdf013 608
609 Double_t tgl=fX3;
70a9314b 610 /*
aecdf013 611 Double_t theta=((TMath::Pi())/2.)-TMath::ATan(tgl);
612 Double_t rad40=(TMath::Pi())*40./180.; // rivedere
613 Double_t rad100=(TMath::Pi())*100/180;
614 Double_t rad360=(TMath::Pi())*2.;
615 Int_t imax=rl->Getimax();
616 Int_t jmax=rl->Getjmax();
617 Int_t i=(Int_t) ( (theta-rad40)/rad100*imax);
618 Int_t j=(Int_t) ( phi/rad360*jmax);
619
620 if(i<0) i=0;
621 if(i>=imax) i=imax-1;
622 if(j<0) j=0;
623 if(j>=jmax) j=jmax-1;
70a9314b 624
aecdf013 625 s(0) = 0.0028/TMath::Sin(theta)+( rl->GetRadMatrix1() )(i,j); // 0.0028 takes into account the beam pipe
626 s(1) = ( rl->GetRadMatrix2() )(i,j);
627 s(2) = ( rl->GetRadMatrix3() )(i,j);
628 s(3) = ( rl->GetRadMatrix4() )(i,j);
629 s(4) = ( rl->GetRadMatrix5() )(i,j);
630 s(5) = ( rl->GetRadMatrix6() )(i,j);
631 */
70a9314b 632 //Double_t mass=0.1396;
aecdf013 633 Int_t layer=(Int_t)GetLayer();
634
635 Double_t cosl=TMath::Cos(TMath::ATan(tgl));
636 Double_t d=fX2;
637 Double_t c=fX4;
638 Double_t cy=c/2.;
639 Double_t q20=1./(cosl*cosl);
640 Double_t q30=c*tgl;
641
642 Double_t q40=cy*(frtrack*frtrack-d*d)/(1.+ 2.*cy*d);
643 Double_t dd=d+cy*d*d-cy*frtrack*frtrack;
644 Double_t dprova=frtrack*frtrack - dd*dd;
645 Double_t q41=0.;
646 if(dprova>0.) q41=-1./cosl*TMath::Sqrt(dprova)/(1.+ 2.*cy*d);
647
648 Double_t p2=(GetPt()*GetPt())/(cosl*cosl);
649 Double_t beta2=p2/(p2+mass*mass);
61231d74 650 // Double_t theta2=14.1*14.1/(beta2*p2*1.e6)*(s(layer-1)/cosl);
651 Double_t theta2=14.1*14.1/(beta2*p2*1.e6)*(s(layer-1)/TMath::Abs(cosl));
aecdf013 652
653 fC22+=theta2*(q40*q40+q41*q41);
654 fC32+=theta2*q20*q40;
655 fC33+=theta2*q20*q20;
656 fC42+=theta2*q30*q40;
657 fC43+=theta2*q30*q20;
658 fC44+=theta2*q30*q30;
659
660}
661void AliITSTrackV1::PrimaryTrack(AliITSRad *rl) {
662//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
663// calculation of part of covariance matrix for vertex constraint
664
665 Double_t rlayer[6];
666
667 rlayer[0]=4.; rlayer[1]=7.; rlayer[2]=14.9; rlayer[3]=23.8;
668 rlayer[4]=39.1; rlayer[5]=43.6;
669
670 Double_t cy=fX4/2.;
671 Double_t tgl=(fX1-fZv)*cy/TMath::ASin(cy*frtrack);
672 Double_t frtrack=1.;
673 fX0=0.;
674 fX1=frtrack*tgl;
675 fX2=fDv;
676 fX3=tgl;
677
678 fC00=fC10=fC11=fC20=fC21=fC22=fC30=fC31=fC32=fC33=fC40=fC41=fC42=fC43=0.;
679
680 AddEL(rl,1.,1);
681 fLayer=0;
682 Int_t i;
683 for (i=0; i<6; i++) {
684 Propagation(rlayer[i]);
685 fLayer++;
686 fd2(i)=fC22;
687 ftgl2(i)=fC33;
688 fdtgl(i)=fC32;
689 AddMS(rl);
690 AddEL(rl,-1,0);
691 }
692}
693
694
695Int_t AliITSTrackV1::DoNotCross(Double_t rk) const{
696//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
697// determine if the track cross a layer
698
699 Double_t c=fX4;
700 Double_t d=fX2;
701 Double_t cy=c/2.;
702 return (TMath::Abs((cy*rk+(1.+cy*d)*d/rk)/(1.+2.*cy*d))>=1.)?1:0;
703}
704
705
706Double_t AliITSTrackV1::ArgA(Double_t rk) const {
707//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
708// quantity usefull in Propagation
709 Double_t c=fX4;
710 Double_t d=fX2;
711 Double_t cy=c/2.;
712 Double_t arg=(cy*rk + (1 + cy*d)*d/rk)/(1.+ 2.*cy*d);
713 if (TMath::Abs(arg) < 1.) return arg;
714 //cout<<"class AliITSTrack: ArgA out of range !\n";/* getchar();*/
715 return (arg>0) ? 0.99999999999 : -0.9999999999;
716}
717
718Double_t AliITSTrackV1::Arga(Double_t rk) const {
719//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
720// quantity usefull in Propagation
721 Double_t c=fX4;
722 Double_t d=fX2;
723 Double_t cy=c/2.;
724 Double_t arg=(rk*rk - d*d)/(1.+ 2.*cy*d);
725 if (arg<0.) {/*cout<<"class AliITSTrack: Arga out of range !\n";*/ arg=0.;}
726 return cy*TMath::Sqrt(arg);
727}
728
729Double_t AliITSTrackV1::ArgB(Double_t rk) const {
730//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
731// quantity usefull in Propagation
732 Double_t c=fX4;
733 Double_t d=fX2;
734 Double_t cy=c/2.;
735 return (rk*rk - d*d)/(rk*(1.+ 2.*cy*d)*(1.+ 2.*cy*d));
736}
737
738Double_t AliITSTrackV1::ArgC(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 return (1./rk - 2.*cy*ArgA(rk)/(1.+ 2.*cy*d));
745}
746
747
70a9314b 748Double_t AliITSTrackV1::GetPredChi2(Double_t m[2], Double_t sigma[2] ) const {
749//Origin A. Badala' and G.S. Pappalardo: e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
750// This function calculates a predicted chi2 increment.
64ab0d55 751
70a9314b 752 Double_t r00=sigma[0], r01=0., r11=sigma[1];
753 r00+=fC00; r01+=fC10; r11+=fC11;
754 Double_t det=r00*r11-r01*r01;
755 if(TMath::Abs(det) < 1.e-15) {cout<<" Problems on matrix in GetPredChi2 "<<det<<"\n";
756 return 1e10;}
757 Double_t tmp=r00; r00=r11; r11=tmp; r01=-r01;
758 Double_t dphi=m[0]-fX0;
759 Double_t dz=m[1]-fX1;
760 Double_t chi2 = (dphi*r00*dphi +2.*r01*dphi*dz + dz*r11*dz)/det;
761 return chi2;
762
70a9314b 763}