#include <TError.h>
#include <TMath.h>
#include <TObjString.h>
#include <TObjArray.h>
#include <TVectorD.h>
#include <TF1.h>
#include <TRandom.h>
#include <TProfile.h>
#include <AliVEvent.h>
#include <AliVParticle.h>
#include <AliKFParticle.h>
#include <AliESDtrackCuts.h>
#include <AliESDEvent.h>
#include <AliMCEvent.h>
#include <AliAODEvent.h>
#include <AliAODTracklets.h>
#include <AliMultiplicity.h>
#include <AliStack.h>
#include "AliDielectronVarCuts.h"
#include "AliDielectronTrackCuts.h"
#include "AliDielectronVarManager.h"
#include "AliDielectronHelper.h"
TVectorD* AliDielectronHelper::MakeLogBinning(Int_t nbinsX, Double_t xmin, Double_t xmax)
{
if (xmin<1e-20 || xmax<1e-20){
Error("AliDielectronHelper::MakeLogBinning","For Log binning xmin and xmax must be > 1e-20. Using linear binning instead!");
return AliDielectronHelper::MakeLinBinning(nbinsX, xmin, xmax);
}
if (xmax<xmin){
Double_t tmp=xmin;
xmin=xmax;
xmax=tmp;
}
TVectorD *binLim=new TVectorD(nbinsX+1);
Double_t first=xmin;
Double_t last=xmax;
Double_t expMax=TMath::Log(last/first);
for (Int_t i=0; i<nbinsX+1; ++i){
(*binLim)[i]=first*TMath::Exp(expMax/nbinsX*(Double_t)i);
}
return binLim;
}
TVectorD* AliDielectronHelper::MakeLinBinning(Int_t nbinsX, Double_t xmin, Double_t xmax)
{
if (xmax<xmin){
Double_t tmp=xmin;
xmin=xmax;
xmax=tmp;
}
TVectorD *binLim=new TVectorD(nbinsX+1);
Double_t first=xmin;
Double_t last=xmax;
Double_t binWidth=(last-first)/nbinsX;
for (Int_t i=0; i<nbinsX+1; ++i){
(*binLim)[i]=first+binWidth*(Double_t)i;
}
return binLim;
}
TVectorD* AliDielectronHelper::MakeArbitraryBinning(const char* bins)
{
TString limits(bins);
if (limits.IsNull()){
Error("AliDielectronHelper::MakeArbitraryBinning","Bin Limit string is empty, cannot add the variable");
return 0x0;
}
TObjArray *arr=limits.Tokenize(",");
Int_t nLimits=arr->GetEntries();
if (nLimits<2){
Error("AliDielectronHelper::MakeArbitraryBinning","Need at leas 2 bin limits, cannot add the variable");
delete arr;
return 0x0;
}
TVectorD *binLimits=new TVectorD(nLimits);
for (Int_t iLim=0; iLim<nLimits; ++iLim){
(*binLimits)[iLim]=(static_cast<TObjString*>(arr->At(iLim)))->GetString().Atof();
}
delete arr;
return binLimits;
}
void AliDielectronHelper::GetMaxPtAndPhi(const AliVEvent *ev, Double_t &ptMax, Double_t &phiOfptMax){
for(Int_t itrk=0; itrk<ev->GetNumberOfTracks(); itrk++) {
AliVParticle *part= ev->GetTrack(itrk);
if(part && part->Pt() > ptMax) {
ptMax = part->Pt();
phiOfptMax = part->Phi();
}
}
}
Int_t AliDielectronHelper::GetNch(const AliMCEvent *ev, Double_t etaRange){
if (!ev || ev->IsA()!=AliMCEvent::Class()) return -1;
AliStack *stack = ((AliMCEvent*)ev)->Stack();
if (!stack) return -1;
Int_t nParticles = stack->GetNtrack();
Int_t nCh = 0;
for (Int_t iMc = 0; iMc < nParticles; ++iMc) {
if (!stack->IsPhysicalPrimary(iMc)) continue;
TParticle* particle = stack->Particle(iMc);
if (!particle) continue;
if (particle->GetPDG()->Charge() == 0) continue;
Float_t eta = particle->Eta();
if (TMath::Abs(eta) < TMath::Abs(etaRange)) nCh++;
}
return nCh;
}
Int_t AliDielectronHelper::GetNaccTrcklts(const AliVEvent *ev, Double_t etaRange){
if (!ev) return -1;
Int_t nTracklets = 0;
Int_t nAcc = 0;
if (ev->IsA() == AliAODEvent::Class()) {
AliAODTracklets *tracklets = ((AliAODEvent*)ev)->GetTracklets();
if (!tracklets) return -1;
nTracklets = tracklets->GetNumberOfTracklets();
for (Int_t nn = 0; nn < nTracklets; nn++) {
Double_t theta = tracklets->GetTheta(nn);
Double_t eta = -TMath::Log(TMath::Tan(theta/2.0));
if (TMath::Abs(eta) < etaRange) nAcc++;
}
} else if (ev->IsA() == AliESDEvent::Class()) {
nTracklets = ((AliESDEvent*)ev)->GetMultiplicity()->GetNumberOfTracklets();
for (Int_t nn = 0; nn < nTracklets; nn++) {
Double_t eta = ((AliESDEvent*)ev)->GetMultiplicity()->GetEta(nn);
if (TMath::Abs(eta) < etaRange) nAcc++;
}
} else return -1;
return nAcc;
}
Double_t AliDielectronHelper::GetNaccTrckltsCorrected(const AliVEvent *event, Double_t uncorrectedNacc, Double_t vtxZ, Int_t type) {
Int_t runNo = event->GetRunNumber();
Int_t period = -1;
Double_t refMult = 0.0;
if(runNo>114930 && runNo<117223) period = 0;
if(runNo>119158 && runNo<120830) period = 1;
if(runNo>122373 && runNo<126438) period = 2;
if(runNo>127711 && runNo<130841) period = 3;
if(period<0 || period>3) return uncorrectedNacc;
if(type<0 || type>8) return uncorrectedNacc;
if(type == 0) refMult = 5.0;
if(type == 1) refMult = 9.5;
if(type == 2) refMult = 13.0;
if(type == 3) refMult = 6.0;
if(type == 4) refMult = 12.0;
if(type == 5) refMult = 16.0;
if(type == 6) refMult = 6.0;
if(type == 7) refMult = 12.0;
if(type == 8) refMult = 15.0;
if(TMath::Abs(vtxZ)>10.0) return uncorrectedNacc;
TProfile* estimatorAvg = AliDielectronVarManager::GetEstimatorHistogram(period, type);
if(!estimatorAvg) return uncorrectedNacc;
Double_t localAvg = estimatorAvg->GetBinContent(estimatorAvg->FindBin(vtxZ));
Double_t deltaM = uncorrectedNacc*(refMult/localAvg - 1);
Double_t correctedNacc = uncorrectedNacc + (deltaM>0 ? 1 : -1) * gRandom->Poisson(TMath::Abs(deltaM));
return correctedNacc;
}
Int_t AliDielectronHelper::GetNacc(const AliVEvent *ev){
if (!ev) return -1;
AliDielectronVarCuts varCuts;
varCuts.AddCut(AliDielectronVarManager::kImpactParXY, -1.0, 1.0);
varCuts.AddCut(AliDielectronVarManager::kImpactParZ, -3.0, 3.0);
varCuts.AddCut(AliDielectronVarManager::kEta, -0.9, 0.9);
varCuts.AddCut(AliDielectronVarManager::kTPCchi2Cl, 0.0, 4.0);
varCuts.AddCut(AliDielectronVarManager::kNclsTPC, 70.0, 160.0);
varCuts.AddCut(AliDielectronVarManager::kKinkIndex0, -0.5, 0.5);
AliDielectronTrackCuts trkCuts;
trkCuts.SetClusterRequirementITS(AliDielectronTrackCuts::kSPD, AliDielectronTrackCuts::kAny);
trkCuts.SetRequireITSRefit(kTRUE);
trkCuts.SetRequireTPCRefit(kTRUE);
Int_t nRecoTracks = ev->GetNumberOfTracks();
Int_t nAcc = 0;
for (Int_t iTrack = 0; iTrack < nRecoTracks; iTrack++) {
AliVTrack *track = static_cast<AliVTrack*>(ev->GetTrack(iTrack));
if (!track) continue;
if (!trkCuts.IsSelected(track)) continue;
if (!varCuts.IsSelected(track)) continue;
nAcc++;
}
return nAcc;
}
Double_t AliDielectronHelper::GetITSTPCMatchEff(const AliVEvent *ev){
if (!ev) return -1;
AliDielectronVarCuts varCutsTPC;
varCutsTPC.AddCut(AliDielectronVarManager::kImpactParXY, -1.0, 1.0);
varCutsTPC.AddCut(AliDielectronVarManager::kImpactParZ, -3.0, 3.0);
varCutsTPC.AddCut(AliDielectronVarManager::kEta, -0.9, 0.9);
varCutsTPC.AddCut(AliDielectronVarManager::kTPCchi2Cl, 0.0, 4.0);
varCutsTPC.AddCut(AliDielectronVarManager::kNclsTPC, 50.0, 160.0);
AliDielectronTrackCuts trkCutsTPC;
trkCutsTPC.SetRequireTPCRefit(kTRUE);
AliDielectronVarCuts varCutsITS;
varCutsITS.AddCut(AliDielectronVarManager::kEta, -0.9, 0.9);
AliDielectronTrackCuts trkCutsITS;
trkCutsITS.SetClusterRequirementITS(AliDielectronTrackCuts::kSPD, AliDielectronTrackCuts::kAny);
trkCutsITS.SetRequireITSRefit(kTRUE);
Int_t nRecoTracks = ev->GetNumberOfTracks();
Double_t nTPC = 0, nITS = 0;
for (Int_t iTrack = 0; iTrack < nRecoTracks; iTrack++) {
AliVTrack *track = static_cast<AliVTrack*>(ev->GetTrack(iTrack));
if (!track) continue;
if(!trkCutsITS.IsSelected(track)) continue;
if(!varCutsITS.IsSelected(track)) continue;
nITS+=1.;
if(!trkCutsTPC.IsSelected(track)) continue;
if(!varCutsTPC.IsSelected(track)) continue;
nTPC+=1.;
}
return (nITS>0. ? nTPC/nITS : -1);
}
void AliDielectronHelper::RotateKFParticle(AliKFParticle * kfParticle,Double_t angle, const AliVEvent * const ev){
if (!kfParticle) return;
Double_t dx = 0.;
Double_t dy = 0.;
Double_t dz = 0.;
if (ev){
dx = ev->GetPrimaryVertex()->GetX()-0.;
dy = ev->GetPrimaryVertex()->GetY()-0.;
dz = ev->GetPrimaryVertex()->GetZ()-0.;
}
kfParticle->X() = kfParticle->GetX() - dx;
kfParticle->Y() = kfParticle->GetY() - dy;
kfParticle->Z() = kfParticle->GetZ() - dz;
Double_t c = cos(angle);
Double_t s = sin(angle);
Double_t mA[8][ 8];
for( Int_t i=0; i<8; i++ ){
for( Int_t j=0; j<8; j++){
mA[i][j] = 0;
}
}
for( int i=0; i<8; i++ ){
mA[i][i] = 1;
}
mA[0][0] = c; mA[0][1] = s;
mA[1][0] = -s; mA[1][1] = c;
mA[3][3] = c; mA[3][4] = s;
mA[4][3] = -s; mA[4][4] = c;
Double_t mAC[8][8];
Double_t mAp[8];
for( Int_t i=0; i<8; i++ ){
mAp[i] = 0;
for( Int_t k=0; k<8; k++){
mAp[i]+=mA[i][k] * kfParticle->GetParameter(k);
}
}
for( Int_t i=0; i<8; i++){
kfParticle->Parameter(i) = mAp[i];
}
for( Int_t i=0; i<8; i++ ){
for( Int_t j=0; j<8; j++ ){
mAC[i][j] = 0;
for( Int_t k=0; k<8; k++ ){
mAC[i][j]+= mA[i][k] * kfParticle->GetCovariance(k,j);
}
}
}
for( Int_t i=0; i<8; i++ ){
for( Int_t j=0; j<=i; j++ ){
Double_t xx = 0;
for( Int_t k=0; k<8; k++){
xx+= mAC[i][k]*mA[j][k];
}
kfParticle->Covariance(i,j) = xx;
}
}
kfParticle->X() = kfParticle->GetX() + dx;
kfParticle->Y() = kfParticle->GetY() + dy;
kfParticle->Z() = kfParticle->GetZ() + dz;
}
Int_t AliDielectronHelper::GetNMothers(const AliMCEvent *ev, Double_t etaRange, Int_t pdgMother, Int_t pdgDaughter, Int_t prim){
if (!ev || ev->IsA()!=AliMCEvent::Class()) return -1;
AliStack *stack = ((AliMCEvent*)ev)->Stack();
if (!stack) return -1;
Int_t nParticles = stack->GetNtrack();
Int_t nMothers = 0;
for (Int_t iMc = 0; iMc < nParticles; ++iMc) {
TParticle* particle = stack->Particle(iMc);
if (!particle) continue;
if (particle->GetPdgCode() != pdgMother) continue;
if (TMath::Abs(particle->Eta()) > TMath::Abs(etaRange)) continue;
if (particle->GetNDaughters() != 2) continue;
if (particle->GetFirstDaughter()>=nParticles ||
particle->GetFirstDaughter()<0 ) continue;
TParticle* dau1 = stack->Particle(particle->GetFirstDaughter());
if (TMath::Abs(dau1->GetPdgCode()) != pdgDaughter) continue;
if (TMath::Abs(dau1->Eta()) > TMath::Abs(etaRange)) continue;
if (particle->GetLastDaughter()>=nParticles ||
particle->GetLastDaughter()<0 ) continue;
TParticle* dau2 = stack->Particle(particle->GetLastDaughter());
if (TMath::Abs(dau2->GetPdgCode()) != pdgDaughter) continue;
if (TMath::Abs(dau2->Eta()) > TMath::Abs(etaRange)) continue;
if (prim != -1) {
if(particle->IsPrimary() != prim) continue;
}
nMothers++;
}
return nMothers;
}
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