New classes for event summary data, track summary data, and vertex summary data
[u/mrichter/AliRoot.git] / TOF / tzero15tracks.C
CommitLineData
bcb56cb9 1void tzero15tracks(const char* datafile, Float_t globalTimeRes=1.2e-10)
2{
3
4 //
5 // Calculate the t0 distribution
6 //
7 // (primary particles reaching TOF)
8 //
9
10
11 // Dynamically link some shared libs
12 if (gClassTable->GetID("AliRun") < 0) {
13 gROOT->LoadMacro("loadlibs.C");
14 loadlibs();
15 }
16
17 // Connect the Root Galice file containing Geometry, Kine and Hits
18 Int_t ngood;
19 Int_t nmisidentified=0;
20 Int_t nmisidentified0=0;
21 Int_t nmisidentified1=0;
22 Int_t nmisidentified2=0;
23 Int_t nmisidentified3=0;
24 Int_t nmisidentified4=0;
25 Int_t nmisidentified5=0;
26 Int_t nmisidentified6=0;
27 Int_t nmisidentified7=0;
28 Int_t nmisidentified8=0;
29 Int_t nmisidentified9=0;
30 Int_t nmisidentified10=0;
31 Int_t nmisidentified11=0;
32 Int_t nmisidentified12=0;
33 Int_t nmisidentified13=0;
34 Int_t nmisidentified14=0;
35 Int_t nbytes = 0;
36 Int_t ipartold = -1;
37 Int_t dblehit = 0;
38 Int_t j,hit,ipart;
39 Int_t nhits;
40 Int_t selected=0;
41 Int_t istop=0;
42 const Float_t timeresolution=globalTimeRes; // in [s]
43 Float_t timeresolutioninns=timeresolution*(1.e+9); // convert in [ns]
44 cout << "Global Time Resolution " << timeresolutioninns << " ns" << endl; //
45
46 // output (histos!) filename
47 char outFileName[100];
48 strcpy(outFileName,"ht015tr");
49 strcat(outFileName,datafile);
50
51 gBenchmark->Start("TOFT0");
52
53 TH1F* htzerobest= new TH1F("htzerobest","T0 for best assignment",200,-1.,1.);
54 TH1F* hchibest = new TH1F("hchibest","ChiSquare Min Distribution",80,0.,40.);
55 TH1F* hchibestconflevel = new TH1F("hchibestconflevel","ChiSquare Min Confidence Level",10,0.,1.);
56
57 Float_t t0best=999.;
58 Int_t assparticle[15]={3,3,3,3,3,3,3,3,3,3,3,3,3,3,3};
59 Int_t truparticle[15]={3,3,3,3,3,3,3,3,3,3,3,3,3,3,3};
60 Float_t timeofflight[15]={0.,0.,0.,0.,0.,0.,0.,0.,0.,0.,0.,0.,0.,0.,0.};
61 Float_t momentum[15]={0.,0.,0.,0.,0.,0.,0.,0.,0.,0.,0.,0.,0.,0.,0.};
62 Float_t timezero[15];
63 Float_t weightedtimezero[15];
64 Float_t beta[15]={0.,0.,0.,0.,0.,0.,0.,0.,0.,0.,0.,0.,0.,0.,0.};
65 Float_t sqMomError[15]={0.,0.,0.,0.,0.,0.,0.,0.,0.,0.,0.,0.,0.,0.,0.};
66 Float_t sqTrackError[15]={0.,0.,0.,0.,0.,0.,0.,0.,0.,0.,0.,0.,0.,0.,0.};
67 Float_t massarray[3]={0.13957,0.493677,0.9382723};
68 Float_t chisquare=999.;
69 Float_t tracktoflen[15]={0.,0.,0.,0.,0.,0.,0.,0.,0.,0.,0.,0.,0.,0.,0.};
70 TRandom* rnd = new TRandom();
71 TParticle *particle;
72 AliTOFhitT0 *tofHit;
73
74 TFile *file = TFile::Open(datafile,"old");
75
76 // Get AliRun object from file or create it if not on file
77 gAlice = (AliRun*)file->Get("gAlice");
78
79 // Import the Kine and Hits Trees for the event evNumber in the file
80
81 Int_t nallevents = (Int_t) gAlice->TreeE()->GetEntries();
82
83 for (Int_t nev=0; nev<nallevents;nev++) {
84
85 Int_t nparticles = gAlice->GetEvent(nev);
86 if (nparticles <= 0) return;
87 // ngood=0;
88 // Get pointers to Alice detectors and Hits containers
89
90 AliDetector *TOF = gAlice->GetDetector("TOF");
91 TObjArray *Particles = gAlice->Particles();
92
93 if (TOF) TClonesArray *TOFhits = TOF->Hits();
94
95 TTree *TH = gAlice->TreeH();
96 Int_t ntracks = TH->GetEntries();
97
98
99 // Start loop on primary tracks in the hits containers
100 Int_t lasttrack=-1;
101 Int_t nset=0;
102 for (Int_t track=lasttrack+1; track<ntracks;track++) {
103
104 if(nset>=3) break; // check on the number of set analyzed
105
106 gAlice->ResetHits();
107 nbytes += TH->GetEvent(track);
108
109 // =======>Histogram TOF
110 if (TOF) {
111 nhits = TOFhits->GetEntriesFast();
112
113 for (hit=0;hit<nhits;hit++) {
114
115 tofHit = (AliTOFhitT0*)TOFhits->UncheckedAt(hit);
116 ipart = tofHit->GetTrack();
117
118 // check to discard the case when the same particle is selected more than one
119 // time
120
121 if (ipart != ipartold){
122
123 particle = (TParticle*)gAlice->Particle(ipart);
124
125 Float_t idealtime=tofHit->GetTof();
126 // Float_t time=idealtime;
127 Float_t time = rnd->Gaus(idealtime, timeresolution);
128 Float_t toflen=tofHit->GetLen();
129 toflen=toflen/100.; // toflen given in m because GEANT gives cm!
130 Int_t pdg = particle->GetPdgCode();
131 Int_t abspdg =TMath::Abs(pdg);
132 Float_t idealmom = particle->P();
133 Float_t momres=idealmom*0.025; // 2.5% res token into account for all momenta
134 //Float_t mom =idealmom+2.*(rnd->Rndm()-0.5)*momres;
135 Float_t mom =rnd->Gaus(idealmom,momres);
136 Bool_t isgoodpart=(abspdg==211 || abspdg==2212 || abspdg==321);
137
138 time*=1.e+9; // tof given in nanoseconds
139 if (particle->GetFirstMother() < 0 && isgoodpart && mom<=1.7 && mom>=1.25){
140
141 selected+=1;
142 istop=selected;
143 if(istop>15) break;
144 Int_t index=selected-1;
145 timeofflight[index]=time;
146 tracktoflen[index]=toflen;
147 momentum[index]=mom;
148 switch (abspdg) {
149 case 211:
150 truparticle[index]=0;
151 break ;
152 case 321:
153 truparticle[index]=1;
154 break ;
155 case 2212:
156 truparticle[index]=2;
157 break ;
158 }
159
160 }
161 ipartold = ipart;
162
163 if(istop==15){ // start analysis on current set
164 nset+=1;
165 lasttrack=track;
166 istop=0;
167 selected=0;
168 cout << "starting t0 calculation for current set" << endl;
169 for (Int_t i1=0; i1<3;i1++) {
170 for (Int_t i2=0; i2<3;i2++) {
171 for (Int_t i3=0; i3<3;i3++) {
172 for (Int_t i4=0; i4<3;i4++) {
173 for (Int_t i5=0; i5<3;i5++) {
174 for (Int_t i6=0; i6<3;i6++) {
175 for (Int_t i7=0; i7<3;i7++) {
176 for (Int_t i8=0; i8<3;i8++) {
177 for (Int_t i9=0; i9<3;i9++) {
178 for (Int_t i10=0; i10<3;i10++) {
179 for (Int_t i11=0; i11<3;i11++) {
180 for (Int_t i12=0; i12<3;i12++) {
181 for (Int_t i13=0; i13<3;i13++) {
182 for (Int_t i14=0; i14<3;i14++) {
183 for (Int_t i15=0; i15<3;i15++) {
184 beta[0]=momentum[0]/sqrt(massarray[i1]*massarray[i1]+momentum[0]*momentum[0]);
185 beta[1]=momentum[1]/sqrt(massarray[i2]*massarray[i2]+momentum[1]*momentum[1]);
186 beta[2]=momentum[2]/sqrt(massarray[i3]*massarray[i3]+momentum[2]*momentum[2]);
187 beta[3]=momentum[3]/sqrt(massarray[i4]*massarray[i4]+momentum[3]*momentum[3]);
188 beta[4]=momentum[4]/sqrt(massarray[i5]*massarray[i5]+momentum[4]*momentum[4]);
189 beta[5]=momentum[5]/sqrt(massarray[i6]*massarray[i6]+momentum[5]*momentum[5]);
190 beta[6]=momentum[6]/sqrt(massarray[i7]*massarray[i7]+momentum[6]*momentum[6]);
191 beta[7]=momentum[7]/sqrt(massarray[i8]*massarray[i8]+momentum[7]*momentum[7]);
192 beta[8]=momentum[8]/sqrt(massarray[i9]*massarray[i9]+momentum[8]*momentum[8]);
193 beta[9]=momentum[9]/sqrt(massarray[i10]*massarray[i10]+momentum[9]*momentum[9]);
194 beta[10]=momentum[10]/sqrt(massarray[i11]*massarray[i11]+momentum[10]*momentum[10]);
195 beta[11]=momentum[11]/sqrt(massarray[i12]*massarray[i12]+momentum[11]*momentum[11]);
196 beta[12]=momentum[12]/sqrt(massarray[i13]*massarray[i13]+momentum[12]*momentum[12]);
197 beta[13]=momentum[13]/sqrt(massarray[i14]*massarray[i14]+momentum[13]*momentum[13]);
198 beta[14]=momentum[14]/sqrt(massarray[i15]*massarray[i15]+momentum[14]*momentum[14]);
199
200
201 Float_t meantzero=0.;
202 Float_t sumAllweights=0.;
203 for (Int_t itz=0; itz<15;itz++) {
204 sqMomError[itz]=((1.-beta[itz]*beta[itz])*0.025)*((1.-beta[itz]*beta[itz])*0.025)*(tracktoflen[itz]/(0.299792*beta[itz]))*(tracktoflen[itz]/(0.299792*beta[itz])); // this gives the square of the momentum error in nanoseconds
205 sqTrackError[itz]=(timeresolutioninns*timeresolutioninns+sqMomError[itz]); // total error for the current track
206 sumAllweights+=1./sqTrackError[itz];
207 // redefining beta, it is useful in order to calculate t zero
208 beta[itz]*=0.299792;
209 timezero[itz]=(tracktoflen[itz]/beta[itz])-timeofflight[itz];
210 weightedtimezero[itz]=((tracktoflen[itz]/beta[itz])-timeofflight[itz])/sqTrackError[itz];// weighted time zero for current track
211 meantzero+=weightedtimezero[itz];
212 }
213 meantzero=meantzero/sumAllweights; // it is given in [ns]
214
215 Float_t dummychisquare=0.;
216 // calculate the chisquare for the current assignment
217 for (Int_t itz=0; itz<15;itz++) {
218 dummychisquare+=(timezero[itz]-meantzero)*(timezero[itz]-meantzero)/sqTrackError[itz];
219 }
220
221
222 if(dummychisquare<=chisquare){
223 assparticle[0]=i1;
224 assparticle[1]=i2;
225 assparticle[2]=i3;
226 assparticle[3]=i4;
227 assparticle[4]=i5;
228 assparticle[5]=i6;
229 assparticle[6]=i7;
230 assparticle[7]=i8;
231 assparticle[8]=i9;
232 assparticle[9]=i10;
233 assparticle[10]=i11;
234 assparticle[11]=i12;
235 assparticle[12]=i13;
236 assparticle[13]=i14;
237 assparticle[14]=i15;
238 chisquare=dummychisquare;
239 t0best=meantzero;
240 }
241 }
242 }
243 }
244 }
245 }
246 }
247 }
248 }
249 }
250 }
251
252 }
253 }
254 }
255 }
256 }
257
258 cout << "true" << truparticle[0] << truparticle[1] << truparticle[2] << truparticle[3] << truparticle[4] << truparticle[5] << truparticle[6] << truparticle[7] << truparticle[8] << truparticle[9] <<truparticle[10] << truparticle[11] << truparticle[12] << truparticle[13] << truparticle[14] <<endl;
259 cout << "best" << assparticle[0] << assparticle[1] << assparticle[2] << assparticle[3] << assparticle[4] << assparticle[5] << assparticle[6] << assparticle[7] << assparticle[8] << assparticle[9] <<assparticle[10] << assparticle[11] << assparticle[12] << assparticle[13] << assparticle[14] << endl;
260 if(truparticle[0]==assparticle[0] && truparticle[1]==assparticle[1] && truparticle[2]==assparticle[2] && truparticle[3]==assparticle[3] && truparticle[4]==assparticle[4]&& truparticle[5]==assparticle[5] && truparticle[6]==assparticle[6] && truparticle[7]==assparticle[7] && truparticle[8]==assparticle[8] && truparticle[9]==assparticle[9] &&truparticle[10]==assparticle[10] && truparticle[11]==assparticle[11] && truparticle[12]==assparticle[12] && truparticle[13]==assparticle[13] && truparticle[14]==assparticle[14]) ngood+=1;
261 if(truparticle[0]!=assparticle[0]) nmisidentified0+=1;
262 if(truparticle[1]!=assparticle[1]) nmisidentified1+=1;
263 if(truparticle[2]!=assparticle[2]) nmisidentified2+=1;
264 if(truparticle[3]!=assparticle[3]) nmisidentified3+=1;
265 if(truparticle[4]!=assparticle[4]) nmisidentified4+=1;
266 if(truparticle[5]!=assparticle[5]) nmisidentified5+=1;
267 if(truparticle[6]!=assparticle[6]) nmisidentified6+=1;
268 if(truparticle[7]!=assparticle[7]) nmisidentified7+=1;
269 if(truparticle[8]!=assparticle[8]) nmisidentified8+=1;
270 if(truparticle[9]!=assparticle[9]) nmisidentified9+=1;
271 if(truparticle[10]!=assparticle[10]) nmisidentified10+=1;
272 if(truparticle[11]!=assparticle[11]) nmisidentified11+=1;
273 if(truparticle[12]!=assparticle[12]) nmisidentified12+=1;
274 if(truparticle[13]!=assparticle[13]) nmisidentified13+=1;
275 if(truparticle[14]!=assparticle[14]) nmisidentified14+=1;
276 cout << "chisquare for current set" << chisquare << endl;
277 //Float_t weight=1./chisquare;
278 //htzerobest->Fill(t0best,weight);
279 htzerobest->Fill(t0best);
280 hchibest->Fill(chisquare);
281 Double_t dblechisquare=(Double_t)chisquare;
282 Float_t confLevel=(Float_t)TMath::Prob(dblechisquare,14);
283 cout << "conf level " << confLevel << endl;
284 hchibestconflevel->Fill(confLevel);
285 chisquare=999.;
286 t0best=999.;
287
288 } // end for the current set. close if(istop==5)
289
290
291 } // end condition on ipartold
292
293
294 }// end loop on hits for the current track
295 }// end TOF
296 if(istop>=15) break;
297 }// end loop on Tracks
298 cout << "ngood for current event " << ngood << endl;
299
300
301 }//end loop on events
302
303 nmisidentified=(nmisidentified0+nmisidentified1+nmisidentified2+nmisidentified3+nmisidentified4+nmisidentified5+nmisidentified6+nmisidentified7+nmisidentified8+nmisidentified9+nmisidentified10+nmisidentified11+nmisidentified12+nmisidentified13+nmisidentified14);
304 cout << "total misidentified " << nmisidentified << endl;
305 TFile *houtfile = new TFile(outFileName,"recreate");
306 houtfile->cd();
307
308 htzerobest->Write();
309 hchibest->Write();
310 hchibestconflevel->Write();
311 houtfile->Close();
312
313 gBenchmark->Stop("TOFT0");
314 cout << "15 tracks:" << endl ;
315 cout << " took " << gBenchmark->GetCpuTime("TOFT0") << " seconds in order to calculate T0 "
316 << gBenchmark->GetCpuTime("TOFT0")/nallevents << " seconds per event " << endl ;
317 cout << endl ;
318
319}
320
321