#include <Riostream.h>
#include <TCanvas.h>
#include <TClonesArray.h>
#include <TDatabasePDG.h>
#include <TFile.h>
#include <TH2F.h>
#include <TLorentzVector.h>
#include <TMath.h>
#include <TParticle.h>
#include <TParticlePDG.h>
#include <TROOT.h>
#include <TRandom.h>
#include <TTree.h>
#include <TVirtualMC.h>
#include <TVector3.h>
#include "AliGenCorrHF.h"
#include "AliLog.h"
#include "AliConst.h"
#include "AliDecayer.h"
#include "AliMC.h"
#include "AliRun.h"
#include "AliGenEventHeader.h"
ClassImp(AliGenCorrHF)
/*
<img src="picts/AliGenCorrHF.gif">
*/
//End_Html
Double_t AliGenCorrHF::fgdph[19] = {0, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140, 150, 160, 170, 180};
Double_t AliGenCorrHF::fgy[31] = {-10,-7, -6.5, -6, -5.5, -5, -4.5, -4, -3.5, -3, -2.5, -2,- 1.5, -1, -0.5, 0, 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 10};
Double_t AliGenCorrHF::fgpt[51] = {0, 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.6, 7.2, 7.8, 8.4, 9, 9.6, 10.3, 11.1, 12, 13, 14, 15, 16, 17, 18, 19, 20.1, 21.5, 23, 24.5, 26, 27.5, 29.1, 31, 33, 35, 37, 39.2, 42, 45, 48, 51, 55.2, 60, 65, 71, 81, 100};
Int_t AliGenCorrHF::fgnptbins = 12;
Double_t AliGenCorrHF::fgptbmin[12] = {0, 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 7, 9};
Double_t AliGenCorrHF::fgptbmax[12] = {0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 7, 9, 100};
AliGenCorrHF::AliGenCorrHF():
fFileName(0),
fFile(0),
fQuark(0),
fEnergy(0),
fBias(0.),
fTrials(0),
fSelectAll(kFALSE),
fDecayer(0),
fgIntegral(0)
{
}
AliGenCorrHF::AliGenCorrHF(Int_t npart, Int_t idquark, Int_t energy):
AliGenMC(npart),
fFileName(0),
fFile(0),
fQuark(idquark),
fEnergy(energy),
fBias(0.),
fTrials(0),
fSelectAll(kFALSE),
fDecayer(0),
fgIntegral(0)
{
if (fQuark == 5) {
if (fEnergy == 7)
fFileName = "$ALICE_ROOT/EVGEN/dataCorrHF/BeautyPP7PythiaMNRwmi.root";
else if (fEnergy == 8)
fFileName = "$ALICE_ROOT/EVGEN/dataCorrHF/BeautyPP8PythiaMNRwmi.root";
else if (fEnergy == 10)
fFileName = "$ALICE_ROOT/EVGEN/dataCorrHF/BeautyPP10PythiaMNRwmi.root";
else if (fEnergy == 14)
fFileName = "$ALICE_ROOT/EVGEN/dataCorrHF/BeautyPP14PythiaMNRwmi.root";
else if (fEnergy == 2)
fFileName = "$ALICE_ROOT/EVGEN/dataCorrHF/BeautyPP276PythiaMNRwmi.root";
else if (fEnergy == 3)
fFileName = "$ALICE_ROOT/EVGEN/dataCorrHF/BeautyPbPb276PythiaMNR.root";
else if (fEnergy == 4)
fFileName = "$ALICE_ROOT/EVGEN/dataCorrHF/BeautyPbPb394PythiaMNR.root";
else if (fEnergy == 5 || fEnergy == -5)
fFileName = "$ALICE_ROOT/EVGEN/dataCorrHF/BeautyPPb5PythiaMNR.root";
else if (fEnergy == 9 || fEnergy == -9)
fFileName = "$ALICE_ROOT/EVGEN/dataCorrHF/BeautyPPb88PythiaMNR.root";
else fFileName = "$ALICE_ROOT/EVGEN/dataCorrHF/BeautyPbPb394PythiaMNR.root";
}
else {
fQuark = 4;
if (fEnergy == 7)
fFileName = "$ALICE_ROOT/EVGEN/dataCorrHF/CharmPP7PythiaMNRwmi.root";
else if (fEnergy == 8)
fFileName = "$ALICE_ROOT/EVGEN/dataCorrHF/CharmPP8PythiaMNRwmi.root";
else if (fEnergy == 10)
fFileName = "$ALICE_ROOT/EVGEN/dataCorrHF/CharmPP10PythiaMNRwmi.root";
else if (fEnergy == 14)
fFileName = "$ALICE_ROOT/EVGEN/dataCorrHF/CharmPP14PythiaMNRwmi.root";
else if (fEnergy == 2)
fFileName = "$ALICE_ROOT/EVGEN/dataCorrHF/CharmPP276PythiaMNRwmi.root";
else if (fEnergy == 3)
fFileName = "$ALICE_ROOT/EVGEN/dataCorrHF/CharmPbPb276PythiaMNR.root";
else if (fEnergy == 4)
fFileName = "$ALICE_ROOT/EVGEN/dataCorrHF/CharmPbPb394PythiaMNR.root";
else if (fEnergy == 5 || fEnergy == -5)
fFileName = "$ALICE_ROOT/EVGEN/dataCorrHF/CharmPPb5PythiaMNR.root";
else if (fEnergy == 9 || fEnergy == -9)
fFileName = "$ALICE_ROOT/EVGEN/dataCorrHF/CharmPPb88PythiaMNR.root";
else fFileName = "$ALICE_ROOT/EVGEN/dataCorrHF/CharmPbPb394PythiaMNR.root";
}
fName = "Default";
fTitle= "Generator for correlated pairs of HF hadrons";
fChildSelect.Set(5);
for (Int_t i=0; i<5; i++) fChildSelect[i]=0;
SetForceDecay();
SetCutOnChild();
SetChildMomentumRange();
SetChildPtRange();
SetChildPhiRange();
SetChildThetaRange();
}
AliGenCorrHF::AliGenCorrHF(char* tname, Int_t npart, Int_t idquark, Int_t energy):
AliGenMC(npart),
fFileName(tname),
fFile(0),
fQuark(idquark),
fEnergy(energy),
fBias(0.),
fTrials(0),
fSelectAll(kFALSE),
fDecayer(0),
fgIntegral(0)
{
if (fQuark != 5) fQuark = 4;
fName = "UserDefined";
fTitle= "Generator for correlated pairs of HF hadrons";
fChildSelect.Set(5);
for (Int_t i=0; i<5; i++) fChildSelect[i]=0;
SetForceDecay();
SetCutOnChild();
SetChildMomentumRange();
SetChildPtRange();
SetChildPhiRange();
SetChildThetaRange();
}
AliGenCorrHF::~AliGenCorrHF()
{
delete fFile;
}
void AliGenCorrHF::Init()
{
AliInfo(Form("Number of HF-hadron pairs = %d",fNpart));
AliInfo(Form(" QQbar kinematics and fragm. functions from: %s",fFileName.Data() ));
fFile = TFile::Open(fFileName.Data());
if(!fFile->IsOpen()){
AliError(Form("Could not open file %s",fFileName.Data() ));
}
ComputeIntegral(fFile);
fParentWeight = 1./fNpart;
if (TVirtualMC::GetMC()) fDecayer = TVirtualMC::GetMC()->GetDecayer();
fDecayer->SetForceDecay(fForceDecay);
fDecayer->Init();
AliGenMC::Init();
}
void AliGenCorrHF::Generate()
{
fDecayer->SetForceDecay(fForceDecay);
fDecayer->Init();
Float_t polar[2][3];
Float_t origin0[2][3];
Float_t pt, pl, ptot;
Float_t phi, theta;
Float_t p[2][3];
Int_t nt, i, j, ihad, ipa, ipa0, ipa1, ihadron[2], iquark[2];
Float_t wgtp[2], wgtch[2], random[6];
Float_t pq[2][3], pc[3];
Double_t tanhy2, qm = 0;
Int_t np[2];
Double_t dphi=0, ptq[2], yq[2], pth[2], plh[2], ph[2], phih[2], phiq[2];
Int_t ncsel[2];
Int_t** pSelected = new Int_t* [2];
Int_t** trackIt = new Int_t* [2];
for (i=0; i<2; i++) {
ptq[i] =0;
yq[i] =0;
pth[i] =0;
plh[i] =0;
phih[i] =0;
phiq[i] =0;
ihadron[i] =0;
iquark[i] =0;
for (j=0; j<3; j++) polar[i][j]=0;
}
if (fQuark == 4) qm = 1.20;
else qm = 4.75;
TClonesArray *particleshad1 = new TClonesArray("TParticle",1000);
TClonesArray *particleshad2 = new TClonesArray("TParticle",1000);
TList *particleslist = new TList();
particleslist->Add(particleshad1);
particleslist->Add(particleshad2);
TDatabasePDG *pDataBase = TDatabasePDG::Instance();
if (fVertexSmear==kPerEvent) {
Vertex();
for (i=0;i<2;i++){
for (j=0;j<3;j++) origin0[i][j]=fVertex[j];
}
}
else {
for (i=0;i<2;i++){
for (j=0;j<3;j++) origin0[i][j]=fOrigin[j];
}
}
ipa = 0;
ipa1 = 0;
ipa0 = 0;
fNprimaries = 0;
while (ipa<2*fNpart) {
GetQuarkPair(fFile, fgIntegral, yq[0], yq[1], ptq[0], ptq[1], dphi);
GetHadronPair(fFile, fQuark, yq[0], yq[1], ptq[0], ptq[1], ihadron[0], ihadron[1], plh[0], plh[1], pth[0], pth[1]);
if (fEnergy == 5 || fEnergy == -5 || fEnergy == 9 || fEnergy == -9) {
Double_t dyBoost = 0.47;
Double_t beta = TMath::TanH(dyBoost);
Double_t gamma = 1./TMath::Sqrt((1.-beta)*(1.+beta));
Double_t gb = gamma * beta;
yq[0] += dyBoost;
yq[1] += dyBoost;
plh[0] = gb * TMath::Sqrt(plh[0]*plh[0] + pth[0]*pth[0]) + gamma * plh[0];
plh[1] = gb * TMath::Sqrt(plh[1]*plh[1] + pth[1]*pth[1]) + gamma * plh[1];
if (fEnergy == 5 || fEnergy == 9) {
yq[0] *= -1;
yq[1] *= -1;
plh[0] *= -1;
plh[1] *= -1;
}
}
theta=TMath::ATan2(pth[0],plh[0]);
if (theta<fThetaMin || theta>fThetaMax) continue;
theta=TMath::ATan2(pth[1],plh[1]);
if (theta<fThetaMin || theta>fThetaMax) continue;
ph[0]=TMath::Sqrt(pth[0]*pth[0]+plh[0]*plh[0]);
if (ph[0]<fPMin || ph[0]>fPMax) continue;
ph[1]=TMath::Sqrt(pth[1]*pth[1]+plh[1]*plh[1]);
if (ph[1]<fPMin || ph[1]>fPMax) continue;
phiq[0] = Rndm()*k2PI;
if (Rndm() < 0.5) {
phiq[1] = phiq[0] + dphi*kDegrad;
} else {
phiq[1] = phiq[0] - dphi*kDegrad;
}
if (phiq[1] > k2PI) phiq[1] -= k2PI;
if (phiq[1] < 0 ) phiq[1] += k2PI;
iquark[0] = +fQuark;
iquark[1] = -fQuark;
TVector2 qvect1 = TVector2();
TVector2 qvect2 = TVector2();
qvect1.SetMagPhi(ptq[0],phiq[0]);
qvect2.SetMagPhi(ptq[1],phiq[1]);
pq[0][0] = qvect1.Px();
pq[0][1] = qvect1.Py();
pq[1][0] = qvect2.Px();
pq[1][1] = qvect2.Py();
tanhy2 = TMath::TanH(yq[0]);
tanhy2 *= tanhy2;
pq[0][2] = TMath::Sqrt((ptq[0]*ptq[0]+qm*qm)*tanhy2/(1-tanhy2));
pq[0][2] = TMath::Sign((Double_t)pq[0][2],yq[0]);
tanhy2 = TMath::TanH(yq[1]);
tanhy2 *= tanhy2;
pq[1][2] = TMath::Sqrt((ptq[1]*ptq[1]+qm*qm)*tanhy2/(1-tanhy2));
pq[1][2] = TMath::Sign((Double_t)pq[1][2],yq[1]);
phih[0] = phiq[0];
phih[1] = phiq[1];
ipa1 = 0;
for (ihad = 0; ihad < 2; ihad++) {
while(1) {
ipa0=ipa1;
fChildWeight=(fDecayer->GetPartialBranchingRatio(ihadron[ihad]))*fParentWeight;
wgtp[ihad]=fParentWeight;
wgtch[ihad]=fChildWeight;
TParticlePDG *particle = pDataBase->GetParticle(ihadron[ihad]);
Float_t am = particle->Mass();
phi = phih[ihad];
pt = pth[ihad];
pl = plh[ihad];
ptot=TMath::Sqrt(pt*pt+pl*pl);
p[ihad][0]=pt*TMath::Cos(phi);
p[ihad][1]=pt*TMath::Sin(phi);
p[ihad][2]=pl;
if(fVertexSmear==kPerTrack) {
Rndm(random,6);
for (j=0;j<3;j++) {
origin0[ihad][j]=
fOrigin[j]+fOsigma[j]*TMath::Cos(2*random[2*j]*TMath::Pi())*
TMath::Sqrt(-2*TMath::Log(random[2*j+1]));
}
}
if (fForceDecay != kNoDecay) {
Float_t energy=TMath::Sqrt(ptot*ptot+am*am);
TLorentzVector pmom(p[ihad][0], p[ihad][1], p[ihad][2], energy);
fDecayer->Decay(ihadron[ihad],&pmom);
np[ihad]=fDecayer->ImportParticles((TClonesArray *)particleslist->At(ihad));
if (fGeometryAcceptance)
if (!CheckAcceptanceGeometry(np[ihad],(TClonesArray*)particleslist->At(ihad))) continue;
trackIt[ihad] = new Int_t [np[ihad]];
pSelected[ihad] = new Int_t [np[ihad]];
Int_t* pFlag = new Int_t [np[ihad]];
for (i=0; i<np[ihad]; i++) {
pFlag[i] = 0;
pSelected[ihad][i] = 0;
}
if (np[ihad] >1) {
TParticle* iparticle = 0;
Int_t ipF, ipL;
for (i = 1; i<np[ihad] ; i++) {
trackIt[ihad][i] = 1;
iparticle =
(TParticle *) ((TClonesArray *) particleslist->At(ihad))->At(i);
Int_t kf = iparticle->GetPdgCode();
Int_t ks = iparticle->GetStatusCode();
if (pFlag[i] == 1) {
ipF = iparticle->GetFirstDaughter();
ipL = iparticle->GetLastDaughter();
if (ipF > 0) for (j=ipF-1; j<ipL; j++) pFlag[j]=1;
continue;
}
if (ks != 1) {
Double_t lifeTime = fDecayer->GetLifetime(kf);
if (lifeTime > (Double_t) fMaxLifeTime) {
ipF = iparticle->GetFirstDaughter();
ipL = iparticle->GetLastDaughter();
if (ipF > 0) for (j=ipF-1; j<ipL; j++) pFlag[j]=1;
} else {
trackIt[ihad][i] = 0;
pSelected[ihad][i] = 1;
}
}
if ((ChildSelected(TMath::Abs(kf)) || fForceDecay == kAll || fSelectAll) && trackIt[ihad][i])
{
if (fCutOnChild) {
pc[0]=iparticle->Px();
pc[1]=iparticle->Py();
pc[2]=iparticle->Pz();
Bool_t childok = KinematicSelection(iparticle, 1);
if(childok) {
pSelected[ihad][i] = 1;
ncsel[ihad]++;
} else {
ncsel[ihad]=-1;
break;
}
} else {
pSelected[ihad][i] = 1;
ncsel[ihad]++;
}
}
}
}
if ((fCutOnChild && ncsel[ihad] >0) || !fCutOnChild) ipa1++;
if (pFlag) delete[] pFlag;
}
else
{
gAlice->GetMCApp()->
PushTrack(fTrackIt,-1,ihadron[ihad],p[ihad],origin0[ihad],polar[ihad],0,kPPrimary,nt,wgtp[ihad]);
ipa1++;
fNprimaries++;
}
break;
}
if (ipa1<ipa0+1){
ipa1=0;
if (pSelected[ihad]) delete pSelected[ihad];
if (trackIt[ihad]) delete trackIt[ihad];
particleshad1->Clear();
particleshad2->Clear();
break;
}
}
if(ipa1==2){
ipa=ipa+ipa1;
if(fForceDecay != kNoDecay){
for(ihad=0;ihad<2;ihad++){
LoadTracks(iquark[ihad],pq[ihad],ihadron[ihad],p[ihad],np[ihad],
(TClonesArray *)particleslist->At(ihad),origin0[ihad],
polar[ihad],wgtp[ihad],wgtch[ihad],nt,ncsel[ihad],
pSelected[ihad],trackIt[ihad]);
if (pSelected[ihad]) delete pSelected[ihad];
if (trackIt[ihad]) delete trackIt[ihad];
}
particleshad1->Clear();
particleshad2->Clear();
}
}
}
SetHighWaterMark(nt);
AliGenEventHeader* header = new AliGenEventHeader("CorrHF");
header->SetPrimaryVertex(fVertex);
header->SetNProduced(fNprimaries);
AddHeader(header);
delete particleshad1;
delete particleshad2;
delete particleslist;
delete[] pSelected;
delete[] trackIt;
}
void AliGenCorrHF::IpCharm(TH2F *hProbHH, Int_t &pdg3, Int_t &pdg4)
{
Int_t pdgH[] = {411, 421, 431, 4122, 4132, 4232, 4332};
Double_t id3, id4;
hProbHH->GetRandom2(id3, id4);
pdg3 = pdgH[(Int_t)TMath::Floor(id3)];
pdg4 = -1*pdgH[(Int_t)TMath::Floor(id4)];
return;
}
void AliGenCorrHF::IpBeauty(TH2F *hProbHH, Int_t &pdg3, Int_t &pdg4)
{
Int_t pdgH[] = {511, 521, 531, 5122, 5132, 5232, 5332};
Double_t id3, id4;
hProbHH->GetRandom2(id3, id4);
pdg3 = pdgH[(Int_t)TMath::Floor(id3)];
pdg4 = -1*pdgH[(Int_t)TMath::Floor(id4)];
if ( (pdg3== 511) || (pdg3== 521) || (pdg3== 531) ) pdg3 *= -1;
if ( (pdg4==-511) || (pdg4==-521) || (pdg4==-531) ) pdg4 *= -1;
return;
}
Double_t AliGenCorrHF::ComputeIntegral(TFile* fG)
{
Int_t cell[6];
TTree* tG = (TTree*) fG->Get("tGqq");
tG->GetBranch("cell")->SetAddress(&cell);
Int_t nbins = tG->GetEntries();
if(fgIntegral) delete [] fgIntegral;
fgIntegral = new Double_t[nbins+1];
fgIntegral[0] = 0;
Int_t bin;
for(bin=0;bin<nbins;bin++) {
tG->GetEvent(bin);
fgIntegral[bin+1] = fgIntegral[bin] + cell[0];
}
if (fgIntegral[nbins] == 0 ) {
return 0;
}
for (bin=1;bin<=nbins;bin++) fgIntegral[bin] /= fgIntegral[nbins];
return fgIntegral[nbins];
}
void AliGenCorrHF::GetQuarkPair(TFile* fG, Double_t* fInt, Double_t &y1, Double_t &y2, Double_t &pt1, Double_t &pt2, Double_t &dphi)
{
Int_t cell[6];
TTree* tG = (TTree*) fG->Get("tGqq");
tG->GetBranch("cell")->SetAddress(&cell);
Int_t nbins = tG->GetEntries();
Double_t rand[6];
gRandom->RndmArray(6,rand);
Int_t ibin = TMath::BinarySearch(nbins,fInt,rand[0]);
tG->GetEvent(ibin);
y1 = fgy[cell[1]] + (fgy[cell[1]+1]-fgy[cell[1]])*rand[1];
y2 = fgy[cell[2]] + (fgy[cell[2]+1]-fgy[cell[2]])*rand[2];
pt1 = fgpt[cell[3]] + (fgpt[cell[3]+1]-fgpt[cell[3]])*rand[3];
pt2 = fgpt[cell[4]] + (fgpt[cell[4]+1]-fgpt[cell[4]])*rand[4];
dphi = fgdph[cell[5]]+ (fgdph[cell[5]+1]-fgdph[cell[5]])*rand[5];
}
void AliGenCorrHF::GetHadronPair(TFile* fG, Int_t idq, Double_t y1, Double_t y2, Double_t pt1, Double_t pt2, Int_t &id3, Int_t &id4, Double_t &pz3, Double_t &pz4, Double_t &pt3, Double_t &pt4)
{
void (*fIpParaFunc)(TH2F *, Int_t &, Int_t &);
fIpParaFunc = IpCharm;
Double_t mq = 1.2;
if (idq == 5) {
fIpParaFunc = IpBeauty;
mq = 4.75;
}
Double_t z11 = 0.;
Double_t z12 = 0.;
Double_t z21 = 0.;
Double_t z22 = 0.;
Double_t pz1, pz2, e1, e2, mh, ptemp, rand[2];
char tag[100];
TH2F *h2h[12], *h2s[12], *hProbHH;
for (Int_t ipt = 0; ipt<fgnptbins; ipt++) {
snprintf(tag,100, "h2h_pt%d",ipt);
h2h[ipt] = (TH2F*) fG->Get(tag);
snprintf(tag,100, "h2s_pt%d",ipt);
h2s[ipt] = (TH2F*) fG->Get(tag);
}
if (y1*y2 < 0) {
for (Int_t ipt = 0; ipt<fgnptbins; ipt++) {
if(pt1 >= fgptbmin[ipt] && pt1 < fgptbmax[ipt])
h2h[ipt]->GetRandom2(z11, z21);
if(pt2 >= fgptbmin[ipt] && pt2 < fgptbmax[ipt])
h2h[ipt]->GetRandom2(z12, z22);
}
}
else {
if (TMath::Abs(y1) > TMath::Abs(y2)) {
for (Int_t ipt = 0; ipt<fgnptbins; ipt++) {
if(pt1 >= fgptbmin[ipt] && pt1 < fgptbmax[ipt])
h2h[ipt]->GetRandom2(z11, z21);
if(pt2 >= fgptbmin[ipt] && pt2 < fgptbmax[ipt])
h2s[ipt]->GetRandom2(z12, z22);
}
}
else {
for (Int_t ipt = 0; ipt<fgnptbins; ipt++) {
if(pt1 >= fgptbmin[ipt] && pt1 < fgptbmax[ipt])
h2s[ipt]->GetRandom2(z11, z21);
if(pt2 >= fgptbmin[ipt] && pt2 < fgptbmax[ipt])
h2h[ipt]->GetRandom2(z12, z22);
}
}
}
gRandom->RndmArray(2,rand);
ptemp = TMath::Sqrt(pt1*pt1 + mq*mq);
pz1 = ptemp*TMath::SinH(y1);
e1 = ptemp*TMath::CosH(y1);
ptemp = TMath::Sqrt(pt2*pt2 + mq*mq);
pz2 = ptemp*TMath::SinH(y2);
e2 = ptemp*TMath::CosH(y2);
hProbHH = (TH2F*)fG->Get("hProbHH");
fIpParaFunc(hProbHH, id3, id4);
mh = TDatabasePDG::Instance()->GetParticle(id3)->Mass();
ptemp = z11*z21*(e1*e1-pz1*pz1) - mh*mh;
if (idq==5) pt3 = pt1;
else pt3 = rand[0];
if (ptemp > 0) pt3 = TMath::Sqrt(ptemp);
if (pz1 > 0) pz3 = (z11*(e1 + pz1) - z21*(e1 - pz1)) / 2;
else pz3 = (z21*(e1 + pz1) - z11*(e1 - pz1)) / 2;
e1 = TMath::Sqrt(pz3*pz3 + pt3*pt3 + mh*mh);
mh = TDatabasePDG::Instance()->GetParticle(id4)->Mass();
ptemp = z12*z22*(e2*e2-pz2*pz2) - mh*mh;
if (idq==5) pt4 = pt2;
else pt4 = rand[1];
if (ptemp > 0) pt4 = TMath::Sqrt(ptemp);
if (pz2 > 0) pz4 = (z12*(e2 + pz2) - z22*(e2 - pz2)) / 2;
else pz4 = (z22*(e2 + pz2) - z12*(e2 - pz2)) / 2;
e2 = TMath::Sqrt(pz4*pz4 + pt4*pt4 + mh*mh);
Float_t ycorr = 0.2, y3, y4;
gRandom->RndmArray(2,rand);
y3 = 0.5 * TMath::Log((e1 + pz3 + 1.e-13)/(e1 - pz3 + 1.e-13));
y4 = 0.5 * TMath::Log((e2 + pz4 + 1.e-13)/(e2 - pz4 + 1.e-13));
if(TMath::Abs(y3)<ycorr && TMath::Abs(y4)<ycorr && rand[0]>0.5) {
ptemp = TMath::Sqrt((e1-pz3)*(e1+pz3));
y3 = 4*(1 - 2*rand[1]);
pz3 = ptemp*TMath::SinH(y3);
pz4 = pz3;
}
}
void AliGenCorrHF::LoadTracks(Int_t iquark, Float_t *pq,
Int_t iPart, Float_t *p,
Int_t np, TClonesArray *particles,
Float_t *origin0, Float_t *polar,
Float_t wgtp, Float_t wgtch,
Int_t &nt, Int_t ncsel, Int_t *pSelected,
Int_t *trackIt){
Int_t i;
Int_t ntq=-1;
Int_t* pParent = new Int_t[np];
Float_t pc[3], och[3];
Int_t iparent;
for(i=0;i<np;i++) pParent[i]=-1;
if ((fCutOnChild && ncsel >0) || !fCutOnChild){
PushTrack(0, -1, iquark, pq, origin0, polar, 0, kPPrimary, nt, wgtp);
KeepTrack(nt);
ntq = nt;
PushTrack(0, ntq, iPart, p, origin0, polar, 0, kPDecay, nt, wgtp);
pParent[0] = nt;
KeepTrack(nt);
fNprimaries++;
for (i = 1; i < np; i++) {
if (pSelected[i]) {
TParticle* iparticle = (TParticle *) particles->At(i);
Int_t kf = iparticle->GetPdgCode();
Int_t jpa = iparticle->GetFirstMother()-1;
Int_t ksc = iparticle->GetStatusCode();
och[0] = origin0[0]+iparticle->Vx();
och[1] = origin0[1]+iparticle->Vy();
och[2] = origin0[2]+iparticle->Vz();
pc[0] = iparticle->Px();
pc[1] = iparticle->Py();
pc[2] = iparticle->Pz();
if (jpa > -1) {
iparent = pParent[jpa];
} else {
iparent = -1;
}
PushTrack(fTrackIt*trackIt[i], iparent, kf,
pc, och, polar,
0, kPDecay, nt, wgtch,ksc);
pParent[i] = nt;
KeepTrack(nt);
fNprimaries++;
}
}
}
if (pParent) delete[] pParent;
return;
}