//
// Calculate the t0 distribution
- //
+ // selecting 15 tracks
// (primary particles reaching TOF)
- //
-
-
+ // NB: see the description of the analogous AliTOFT0 class
+ // NB II: apply this macro to a realistic Pb-Pb event (e.g. Hijing event)
+ // Use case
+ // - start root
+ // root [0] .L tzero15tracksopt.C
+ // // exec the macro with the default time resolution 120 ps
+ // root [1] tzero15tracksopt("hij25evCentralTOFv4T0Set10.04T.root")
+
+ // // exec the macro with 150 ps global time resolution
+ // // NB: time resolution has to be given in [s]
+ // root [1] tzero15tracksopt("hij25evCentralTOFv4T0Set10.04T.root", 1.5e-10))
+
+
// Dynamically link some shared libs
if (gClassTable->GetID("AliRun") < 0) {
gROOT->LoadMacro("loadlibs.C");
Bool_t isgoodpart=(abspdg==211 || abspdg==2212 || abspdg==321);
time*=1.e+9; // tof given in nanoseconds
- if (particle->GetFirstMother() < 0 && isgoodpart && mom<=1.7 && mom>=1.25){
+ if (particle->GetFirstMother() < 0 && isgoodpart && mom<=1.75 && mom>=1.25){
selected+=1;
istop=selected;
selected=0;
cout << "starting t0 calculation for current set" << endl;
for (Int_t i1=0; i1<3;i1++) {
+ beta[0]=momentum[0]/TMath::Sqrt(massarray[i1]*massarray[i1]+momentum[0]*momentum[0]);
for (Int_t i2=0; i2<3;i2++) {
+ beta[1]=momentum[1]/TMath::Sqrt(massarray[i2]*massarray[i2]+momentum[1]*momentum[1]);
for (Int_t i3=0; i3<3;i3++) {
+ beta[2]=momentum[2]/TMath::Sqrt(massarray[i3]*massarray[i3]+momentum[2]*momentum[2]);
for (Int_t i4=0; i4<3;i4++) {
+ beta[3]=momentum[3]/TMath::Sqrt(massarray[i4]*massarray[i4]+momentum[3]*momentum[3]);
for (Int_t i5=0; i5<3;i5++) {
+ beta[4]=momentum[4]/TMath::Sqrt(massarray[i5]*massarray[i5]+momentum[4]*momentum[4]);
for (Int_t i6=0; i6<3;i6++) {
+ beta[5]=momentum[5]/TMath::Sqrt(massarray[i6]*massarray[i6]+momentum[5]*momentum[5]);
for (Int_t i7=0; i7<3;i7++) {
+ beta[6]=momentum[6]/TMath::Sqrt(massarray[i7]*massarray[i7]+momentum[6]*momentum[6]);
for (Int_t i8=0; i8<3;i8++) {
+ beta[7]=momentum[7]/TMath::Sqrt(massarray[i8]*massarray[i8]+momentum[7]*momentum[7]);
for (Int_t i9=0; i9<3;i9++) {
+ beta[8]=momentum[8]/TMath::Sqrt(massarray[i9]*massarray[i9]+momentum[8]*momentum[8]);
for (Int_t i10=0; i10<3;i10++) {
+ beta[9]=momentum[9]/TMath::Sqrt(massarray[i10]*massarray[i10]+momentum[9]*momentum[9]);
for (Int_t i11=0; i11<3;i11++) {
+ beta[10]=momentum[10]/TMath::Sqrt(massarray[i11]*massarray[i11]+momentum[10]*momentum[10]);
for (Int_t i12=0; i12<3;i12++) {
+ beta[11]=momentum[11]/TMath::Sqrt(massarray[i12]*massarray[i12]+momentum[11]*momentum[11]);
for (Int_t i13=0; i13<3;i13++) {
+ beta[12]=momentum[12]/TMath::Sqrt(massarray[i13]*massarray[i13]+momentum[12]*momentum[12]);
for (Int_t i14=0; i14<3;i14++) {
- for (Int_t i15=0; i15<3;i15++) {
- beta[0]=momentum[0]/sqrt(massarray[i1]*massarray[i1]+momentum[0]*momentum[0]);
- beta[1]=momentum[1]/sqrt(massarray[i2]*massarray[i2]+momentum[1]*momentum[1]);
- beta[2]=momentum[2]/sqrt(massarray[i3]*massarray[i3]+momentum[2]*momentum[2]);
- beta[3]=momentum[3]/sqrt(massarray[i4]*massarray[i4]+momentum[3]*momentum[3]);
- beta[4]=momentum[4]/sqrt(massarray[i5]*massarray[i5]+momentum[4]*momentum[4]);
- beta[5]=momentum[5]/sqrt(massarray[i6]*massarray[i6]+momentum[5]*momentum[5]);
- beta[6]=momentum[6]/sqrt(massarray[i7]*massarray[i7]+momentum[6]*momentum[6]);
- beta[7]=momentum[7]/sqrt(massarray[i8]*massarray[i8]+momentum[7]*momentum[7]);
- beta[8]=momentum[8]/sqrt(massarray[i9]*massarray[i9]+momentum[8]*momentum[8]);
- beta[9]=momentum[9]/sqrt(massarray[i10]*massarray[i10]+momentum[9]*momentum[9]);
- beta[10]=momentum[10]/sqrt(massarray[i11]*massarray[i11]+momentum[10]*momentum[10]);
- beta[11]=momentum[11]/sqrt(massarray[i12]*massarray[i12]+momentum[11]*momentum[11]);
- beta[12]=momentum[12]/sqrt(massarray[i13]*massarray[i13]+momentum[12]*momentum[12]);
- beta[13]=momentum[13]/sqrt(massarray[i14]*massarray[i14]+momentum[13]*momentum[13]);
- beta[14]=momentum[14]/sqrt(massarray[i15]*massarray[i15]+momentum[14]*momentum[14]);
-
-
+ beta[13]=momentum[13]/TMath::Sqrt(massarray[i14]*massarray[i14]+momentum[13]*momentum[13]);
+ for (Int_t i15=0; i15<3;i15++) {
+ beta[14]=momentum[14]/TMath::Sqrt(massarray[i15]*massarray[i15]+momentum[14]*momentum[14]);
+
Float_t meantzero=0.;
Float_t sumAllweights=0.;
for (Int_t itz=0; itz<15;itz++) {
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
sqTrackError[itz]=(timeresolutioninns*timeresolutioninns+sqMomError[itz]); // total error for the current track
sumAllweights+=1./sqTrackError[itz];
- // redefining beta, it is useful in order to calculate t zero
- beta[itz]*=0.299792;
- timezero[itz]=(tracktoflen[itz]/beta[itz])-timeofflight[itz];
- weightedtimezero[itz]=((tracktoflen[itz]/beta[itz])-timeofflight[itz])/sqTrackError[itz];// weighted time zero for current track
+ timezero[itz]=(tracktoflen[itz]/(beta[itz]*0.299792))-timeofflight[itz];
+ weightedtimezero[itz]=((tracktoflen[itz]/(beta[itz]*0.299792))-timeofflight[itz])/sqTrackError[itz];// weighted time zero for current track
meantzero+=weightedtimezero[itz];
}
+
meantzero=meantzero/sumAllweights; // it is given in [ns]
Float_t dummychisquare=0.;
}
}
- 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;
- 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;
- 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;
+ 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[1
+2] << truparticle[13] << truparticle[14] <<endl;
+ 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[1
+2] << assparticle[13] << assparticle[14] << endl;
+ 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] && trupart
+icle[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;
if(truparticle[0]!=assparticle[0]) nmisidentified0+=1;
if(truparticle[1]!=assparticle[1]) nmisidentified1+=1;
if(truparticle[2]!=assparticle[2]) nmisidentified2+=1;
if(truparticle[13]!=assparticle[13]) nmisidentified13+=1;
if(truparticle[14]!=assparticle[14]) nmisidentified14+=1;
cout << "chisquare for current set" << chisquare << endl;
- //Float_t weight=1./chisquare;
- //htzerobest->Fill(t0best,weight);
htzerobest->Fill(t0best);
hchibest->Fill(chisquare);
Double_t dblechisquare=(Double_t)chisquare;
chisquare=999.;
t0best=999.;
- } // end for the current set. close if(istop==5)
+ } // end for the current set. close if(istop==15)
} // end condition on ipartold
}//end loop on events
- nmisidentified=(nmisidentified0+nmisidentified1+nmisidentified2+nmisidentified3+nmisidentified4+nmisidentified5+nmisidentified6+nmisidentified7+nmisidentified8+nmisidentified9+nmisidentified10+nmisidentified11+nmisidentified12+nmisidentified13+nmisidentified14);
+ nmisidentified=(nmisidentified0+nmisidentified1+nmisidentified2+nmisidentified3+nmisidentified4+nmisidentified5+nmisidentified6+nmisidentified7+nmisidentified8+nmisidentified9+nmisidentified10+nmisidentified11+nmisidentified12+nmisidentified13+nmisident
+ified14);
cout << "total misidentified " << nmisidentified << endl;
TFile *houtfile = new TFile(outFileName,"recreate");
houtfile->cd();
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff