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);
}
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;
}
}
bool Soft_Cluster_Handler::
AttachHadronsToBlob(Cluster_List * clin,Blob * blob)
{
Cluster_Iterator cit(clin->begin());
Particle * part;
Cluster * cluster;
while (cit!=clin->end()) {
cluster = (*cit);
switch (cluster->size()) {
case 1:
part = cluster->GetSelf();
part->SetFinalMass();
blob->AddToOutParticles(part);
msg_Tracking()<<"$$ attach one hadron ("<<part->Flav()<<", "
<<part->Momentum()<<", "
<<"pt = "<<part->Momentum().PPerp()<<", "
<<"y = "<<part->Momentum().Y()<<") "
<<"from cluster "<<cluster->Number()<<", "
<<"m = "<<cluster->Mass()<<".\n";
delete cluster->GetTrip();
delete cluster->GetAnti();
delete cluster;
cit = clin->erase(cit);
break;
case 2:
FixHHDecay(cluster,blob,(*cluster)[0],(*cluster)[1]);
delete cluster->GetTrip();
delete cluster->GetAnti();
delete cluster;
cit = clin->erase(cit);
break;
case 0:
cit++;
break;
default:
cit++;
break;
}
}
return true;
}
bool Hadron_Remnant::DecomposeHadron()
{
bool success=true;
double Eb(p_beam->Energy());
for (Particle_List::iterator pit=m_extracted.begin();
pit!=m_extracted.end();++pit) {
if ((*pit)->Momentum()[0]>Eb || (*pit)->Momentum()[0]<0.0) {
msg_Error()<<"Hadron_Remnant::DecomposeHadron(): "
<<"Constituent energy out of range. \n E_"
<<(*pit)->Flav()<<" = "<<(*pit)->Momentum()[0]
<<"."<<std::endl;
success=false;
}
for (size_t j=0;j<m_constit.size();++j) {
if ((*pit)->Flav()==m_constit[j]) {
//std::cout<<METHOD<<" "<<success<<":"<<(*pit)->Flav()
// <<" ("<<ValenceQuark(*pit)<<")"<<std::endl;
if (success && ValenceQuark(*pit)) {
p_start = new Color_Dipole(*pit,&m_companions);
p_start->Begin(ANTI((*pit)->Flav().IsAnti()))->
SetFlav(Opposite((*pit)->Flav()));
return success;
}
}
}
}
Flavour flav = m_constit[(size_t)(ran->Get()*3.)];
Particle * part = new Particle(-1,flav);
part->SetStatus(part_status::active);
part->SetFinalMass(flav.Mass());
part->SetFlow(COLOR((qri::type)(flav.IsAnti())),Flow::Counter());
//std::cout<<METHOD<<":"<<flav<<std::endl
// <<" "<<(*part)<<std::endl;
p_start = new Color_Dipole(part,&m_companions);
p_start->Begin(ANTI(flav.IsAnti()))->SetFlav(Opposite(flav));
m_companions.push_back(part);
return success;
}
