void Lund_Interface::FillOutgoingParticlesInBlob(Blob *blob)
{
Flavour flav;
Vec4D momentum;
Particle * particle;
int n_q(0), n_g(0); Particle_Vector partons;
for (int j=hepevt.jdahep[0][0]-1;j<hepevt.jdahep[0][1];j++) {
int idhep = hepevt.idhep[j];
flav=IdhepToSherpa(idhep);
momentum=Vec4D(hepevt.phep[j][3],hepevt.phep[j][0],
hepevt.phep[j][1],hepevt.phep[j][2]);
// don't fill blob position vector here, because decay is in CMS until boosting back
particle = new Particle(-1,flav,momentum);
particle->SetNumber(0);
particle->SetStatus(part_status::active);
particle->SetInfo('D');
particle->SetFinalMass(hepevt.phep[j][4]);
blob->AddToOutParticles(particle);
if(abs(idhep)>0 && abs(idhep)<7) {
n_q++;
partons.push_back(particle);
}
else if(abs(idhep)==21) {
n_g++;
partons.push_back(particle);
}
}
size_t n=partons.size();
if(n>0) blob->SetStatus(blob_status::needs_showers);
if(n_q==2 && n_g==0 && n==2) {
if(partons[0]->Flav().IsAnti()) {
partons[0]->SetFlow(2,-1);
partons[1]->SetFlow(1,partons[0]->GetFlow(2));
}
else {
partons[0]->SetFlow(1,-1);
partons[1]->SetFlow(2,partons[0]->GetFlow(1));
}
}
else if(n_q==0 && n_g==2 && n==2) {
partons[0]->SetFlow(2,-1);
partons[0]->SetFlow(1,-1);
partons[1]->SetFlow(2,partons[0]->GetFlow(1));
partons[1]->SetFlow(1,partons[0]->GetFlow(2));
}
else if(n_q==0 && n_g==3 && n==3) {
partons[0]->SetFlow(2,-1);
partons[0]->SetFlow(1,-1);
partons[1]->SetFlow(2,partons[0]->GetFlow(1));
partons[1]->SetFlow(1,-1);
partons[2]->SetFlow(2,partons[1]->GetFlow(1));
partons[2]->SetFlow(1,partons[0]->GetFlow(2));
}
else if(n>0) {
msg_Error()<<METHOD<<" wasn't able to set the color flow for"<<endl<<*blob<<endl;
}
}
void Lund_Interface::FillFragmentationBlob(Blob *blob)
{
Particle *particle;
Flavour flav;
Vec4D momentum, position;
for (int i=0;i<hepevt.nhep;++i) {
if ((hepevt.isthep[i]!=2)&&(hepevt.isthep[i]!=1)&&(hepevt.isthep[i]!=149)) continue;
if (hepevt.idhep[i]==93) flav=Flavour(kf_cluster);
else flav=IdhepToSherpa(hepevt.idhep[i]);
if (flav==Flavour(kf_string) ||
flav==Flavour(kf_cluster)) {
for (int j=hepevt.jdahep[i][0]-1;j<hepevt.jdahep[i][1];j++) {
flav=IdhepToSherpa(hepevt.idhep[j]);
momentum=Vec4D(hepevt.phep[j][3],hepevt.phep[j][0],
hepevt.phep[j][1],hepevt.phep[j][2]);
position=Vec4D(hepevt.vhep[j][3],hepevt.vhep[j][0],
hepevt.vhep[j][1],hepevt.vhep[j][2]);
particle = new Particle(-1,flav,momentum);
particle->SetNumber(0);
particle->SetStatus(part_status::active);
particle->SetInfo('P');
particle->SetFinalMass(hepevt.phep[j][4]);
blob->SetPosition(position);
blob->AddToOutParticles(particle);
}
}
}
blob->SetStatus(blob_status::needs_hadrondecays);
}
