void Colour_Generator::FinalColours() {
// msg_Out()<<METHOD<<":\n";
size_t flow(0),col(0);
Particle * part;
Flavour flav;
for (size_t beam=0;beam<2;beam++) {
size_t length(m_hadrons[1-beam]->Size());
/* msg_Out()<<" Trips["<<beam<<"]:";
for (set<int>::iterator cit=m_col[beam][0].begin();
cit!=m_col[beam][0].end();cit++) msg_Out()<<" "<<(*cit);
msg_Out()<<"\n";
msg_Out()<<" Antis["<<beam<<"]:";
for (set<int>::iterator cit=m_col[beam][1].begin();
cit!=m_col[beam][1].end();cit++) msg_Out()<<" "<<(*cit);
msg_Out()<<"\n";*/
for (size_t i=length-2;i<length;i++) {
part = m_hadrons[1-beam]->GetParticle(i);
flav = part->Flav();
if (flav.IsQuark() || flav.IsDiQuark()) {
if ((flav.IsQuark() && !flav.IsAnti()) ||
(flav.IsDiQuark() && flav.IsAnti())) flow=0;
if ((flav.IsQuark() && flav.IsAnti()) ||
(flav.IsDiQuark() && !flav.IsAnti())) flow=1;
if (m_col[beam][flow].size()>0) {
col = (*m_col[beam][flow].begin());
part->SetFlow(flow+1,col);
m_col[beam][flow].erase(m_col[beam][flow].begin());
}
else {
part->SetFlow(flow+1,-1);
m_col[beam][1-flow].insert(part->GetFlow(flow+1));
}
}
else if (flav.IsGluon()) {
for (flow=0;flow<2;flow++) {
if (m_col[beam][flow].size()>0) {
col = (*m_col[beam][flow].begin());
part->SetFlow(flow+1,col);
m_col[beam][flow].erase(m_col[beam][flow].begin());
}
else {
part->SetFlow(flow+1,-1);
m_col[beam][1-flow].insert(part->GetFlow(flow+1));
}
}
}
// msg_Out()<<(*part)<<"\n";
}
}
}
bool Simple_String::CreateMomenta()
{
m_filledblob=false;
if (p_remnants[0]==NULL || p_remnants[1]==NULL) {
msg_Error()<<"Simple_String::CreateMomenta(): "
<<"No remnant found."<<std::endl;
return false;
}
m_reggeons[0]->Fit(m_start[0]*m_start[0],m_start[2]);
m_start[1]=sqrt(m_reggeons[0]->GetT(0.0,m_start[0]*m_start[0],ran->Get()));
const unsigned int flow=Flow::Counter();
for (short unsigned int i=0;i<2;++i) {
PDF::Hadron_Remnant *hadron=
dynamic_cast<PDF::Hadron_Remnant*>(p_remnants[i]);
if (hadron==NULL) {
msg_Error()<<"Simple_String::CreateMomenta(): "
<<"Incoming particle is no hadron."<<std::endl;
return false;
}
const std::vector<Flavour> &constit=
hadron->GetConstituents(kf_none);
double pz=0.0, phi=ran->Get()*2.0*M_PI;
for (size_t j=0;j<constit.size();++j) {
if (constit[j].IsQuark() && constit[j].IsAnti()==i) {
Particle *particle = new Particle(0,constit[j]);
do {
double E=hadron->GetBeam()->Energy()*
hadron->GetXPDF(constit[j],m_start[0]*m_start[0]);
pz=sqrt(E*E-sqr(constit[j].Mass())-m_start[1]*m_start[1]);
if (i==1) pz*=-1.0;
particle->SetMomentum(Vec4D(E,(i==0?1.0:-1.0)*m_start[1]*cos(phi),
(i==0?1.0:-1.0)*m_start[1]*sin(phi),pz));
} while (!(dabs(pz)>0.0));
particle->SetFlow(1+constit[j].IsAnti(),flow);
particle->SetFlow(2-constit[j].IsAnti(),0);
particle->SetStatus(part_status::active);
m_inparticles.push_back(particle);
m_outparticles.push_back(particle);
break;
}
}
}
m_filledblob=true;
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;
}
size_t Colour_Generator::
SelectColourReplacement(Particle * part1,Particle * part2) {
bool dir(ran->Get()>=0.5),found(false);
size_t beam,index,col,col1,idcol;
for (size_t i=0;i<2;i++) {
beam = dir?i:1-i;
for (index = 1;index<3;index++) {
col = (beam==1?part2:part1)->GetFlow(index);
for (set<int>::iterator cit=m_col[beam][2-index].begin();
cit!=m_col[beam][2-index].end();cit++) {
if (col==(*cit)) {
col1 = (beam==1?part1:part2)->GetFlow(3-index);
if (col1!=0) {
found = false;
for (int i=0;i<m_hadrons[1-beam]->GetParticles().size();i++){
if (m_hadrons[1-beam]->GetParticles()[i]->GetFlow(index)==col &&
m_hadrons[1-beam]->GetParticles()[i]->GetFlow(3-index)!=col1){
found = true;
idcol = m_hadrons[1-beam]->GetParticles()[i]->GetFlow(3-index);
break;
}
}
break;
}
}
}
if (found) break;
}
if (found) break;
}
if (!found) return 0;
p_compensator = new Blob(p_ladder->Position()*rpa->hBar()*rpa->c());
p_compensator->SetId();
p_compensator->SetType(btp::Soft_Collision);
p_compensator->SetTypeSpec("ColourCompensation");
p_compensator->SetStatus(blob_status::inactive);
p_compensator->AddToInParticles((beam==1?part2:part1));
(beam==1?part2:part1)->SetStatus(part_status::decayed);
Particle * gluon = new Particle(-1,Flavour(kf_gluon),Vec4D(0.,0.,0.,0.),'R');
gluon->SetNumber();
gluon->SetFlow(index,col1);
gluon->SetFlow(3-index,col);
if (col1==0 || col1==0)
msg_Error()<<"Error with colours here (4).\n";
gluon->SetStatus(part_status::decayed);
p_compensator->AddToInParticles(gluon);
p_blob->AddToOutParticles(gluon);
Particle * part= new Particle(*((beam==1?part2:part1)));
part->SetNumber();
part->SetFlow(index,col1);
if ((part->Flav().IsGluon() && col1==0) ||
(part->Flav().IsQuark() && part->Flav().IsAnti() &&
index==2 && col1==0) ||
(part->Flav().IsQuark() && !part->Flav().IsAnti() &&
index==1 && col1==0))
msg_Error()<<"Error with colours here (5).\n";
(beam==1?p_ladder->GetIn2():p_ladder->GetIn1())->m_flow.SetCode(index,col1);
(beam==1?p_ladder->GetIn2():p_ladder->GetIn1())->p_part = part;
for (int i=0;i<p_blob->NInP();i++) {
part = p_blob->InParticle(i);
if (part->GetFlow(index)==col && part->GetFlow(3-index)==idcol &&
part->Beam()==(1-beam)){
part->SetFlow(index,col1);
break;
}
if ((part->Flav().IsGluon() && col1==0) ||
(part->Flav().IsQuark() && part->Flav().IsAnti() &&
index==2 && col1==0) ||
(part->Flav().IsQuark() && !part->Flav().IsAnti() &&
index==1 && col1==0))
msg_Error()<<"Error with colours here (6).\n";
}
m_col[beam][2-index].erase(col);
m_col[beam][2-index].insert(col1);
return (beam==1?3-index:index);
}
