Blob_List* GenerateEvent()
{
Blob_List* blobs = new Blob_List();
Particle* mother_part = new Particle( 1,mother_flav,Vec4D(mother_flav.HadMass(),0.,0.,0.) );
mother_part->SetTime();
mother_part->SetFinalMass(mother_flav.HadMass());
Blob* blob = blobs->AddBlob(btp::Hadron_Decay);
blob->SetStatus(blob_status::needs_hadrondecays);
blob->AddToInParticles(mother_part);
try {
hadrons->FillOnshellDecay(blob, NULL);
} catch (Return_Value::code ret) {
msg_Error()<<METHOD<<" Something went wrong for event: "<<*blobs
<<endl;
return blobs;
}
hadrons->CleanUp();
msg_Events()<<*blobs<<std::endl;
return blobs;
}
bool Amisic::GenerateHardEvent(ATOOLS::Blob_List *blobs)
{
p_hardbase->Reset();
while (true) {
Blob *newblob = new Blob();
if (GenerateHardProcess(newblob)) {
newblob->SetType(btp::Hard_Collision);
newblob->SetStatus(blob_status::needs_showers &
blob_status::needs_beams &
blob_status::needs_hadronization);
newblob->SetId();
blobs->push_back(newblob);
}
else {
delete newblob;
if (MI_Base::StopGeneration(MI_Base::HardEvent)) return true;
msg_Tracking()<<"Amisic::GenerateHardEvent(): "
<<"Cannot create hard underlying event."<<std::endl
<<" Abort attempt."<<std::endl;
return false;
}
}
return true;
}
Return_Value::code Signal_Process_FS_QED_Correction::Treat
(Blob_List * bloblist, double & weight)
{
if (!m_on) return Return_Value::Nothing;
if (bloblist->empty()) {
msg_Error()<<"Signal_Process_FS_QED_Correction::Treat"
<<"("<<bloblist<<","<<weight<<"): "<<endl
<<" Blob list contains "<<bloblist->size()<<" entries."<<endl
<<" Continue and hope for the best."<<endl;
return Return_Value::Error;
}
// look for QCD corrected hard process in need for QED
Blob * sigblob(bloblist->FindLast(btp::Shower));
if (!sigblob) return Return_Value::Nothing;
// if already treated -> nothing to do
if (sigblob->TypeSpec()=="YFS-type_QED_Corrections_to_ME")
return Return_Value::Nothing;
if (sigblob->TypeSpec()=="setting_leptons_on-shell")
return Return_Value::Nothing;
// extract FS leptons
// two vectors -> the ones from the blob and the ones to be massive
DEBUG_FUNC(m_qed);
Particle_Vector fslep(sigblob->GetOutParticles());
Particle_Vector mfslep;
for (Particle_Vector::iterator it=fslep.begin();it!=fslep.end();) {
if ((*it)->Flav().Strong() || (*it)->Flav().IsDiQuark() ||
(*it)->DecayBlob()!=NULL) {
fslep.erase(it);
}
else {
mfslep.push_back(new Particle(-1,(*it)->Flav(),(*it)->Momentum(),'F'));
(*mfslep.rbegin())->SetNumber(0);
(*mfslep.rbegin())->SetOriginalPart(*it);
(*mfslep.rbegin())->SetFinalMass((*it)->FinalMass());
++it;
}
}
// if no leptons, nothing to do
// if only one lepton, cannot do anything
if (fslep.size()<2) {
sigblob->UnsetStatus(blob_status::needs_extraQED);
for (Particle_Vector::iterator it=mfslep.begin();it!=mfslep.end();++it)
delete *it;
return Return_Value::Nothing;
}
// if switched off or no need for QED stop here and build a blob
if (!m_qed || !sigblob->Has(blob_status::needs_extraQED)) {
Blob * onshellblob = bloblist->AddBlob(btp::QED_Radiation);
onshellblob->SetTypeSpec("setting_leptons_on-shell");
if (sigblob->Has(blob_status::needs_extraQED))
sigblob->UnsetStatus(blob_status::needs_extraQED);
for (Particle_Vector::iterator it=fslep.begin();it!=fslep.end();++it) {
(*it)->SetInfo('H');
(*it)->SetStatus(part_status::decayed);
onshellblob->AddToInParticles(*it);
}
for (Particle_Vector::iterator it=mfslep.begin();it!=mfslep.end();++it) {
onshellblob->AddToOutParticles(*it);
}
onshellblob->SetStatus(blob_status::needs_hadronization);
return Return_Value::Success;
}
// put them on-shell (spoils consistency of pertubative calculation,
// but necessary for YFS)
if (!PutOnMassShell(mfslep)) {
msg_Error()<<"Signal_Process_FS_QED_Correction::Treat("
<<bloblist<<","<<weight<<"): \n"
<<" Leptons could not be put on their mass shell.\n"
<<" Trying new event.\n"
<<" The event contained a ";
for (Particle_Vector::iterator it=mfslep.begin();it!=mfslep.end();++it)
msg_Error()<<(*it)->Flav().ShellName()<<"-";
if (mfslep.size()==2) msg_Error()<<"pair";
else msg_Error()<<"set";
msg_Error()<<" of too little invariant mass to be put\n"
<<" on their mass shell. If you are sensitive to this specific"
<<" signature consider\n to set the respective particles"
<<" massive in the perturbative calculation using\n"
<<" 'MASSIVE[<id>]=1' to avoid this problem.\n";
for (Particle_Vector::iterator it=mfslep.begin();it!=mfslep.end();++it)
delete *it;
return Return_Value::New_Event;
}
// build effective verteces for resonant production
// use subprocess infos if possible
Blob_Vector blobs = BuildResonantBlobs(mfslep);
// add radiation
for (Blob_Vector::iterator it=blobs.begin();it!=blobs.end();++it) {
// do nothing if no resonance determined
if ((*it)->InParticle(0)->Flav().Kfcode()!=kf_none) {
(*it)->SetStatus(blob_status::needs_extraQED);
if (!p_sphotons->AddRadiation(*it)) {
msg_Error()<<"Signal_Process_FS_QED_Correction::Treat("<<bloblist
<<","<<weight<<"): "<<endl
<<" Higher order QED corrections failed."<<endl
<<" Retrying event."<<endl;
for (Particle_Vector::iterator it=mfslep.begin();it!=mfslep.end();++it)
delete *it;
for (Blob_Vector::iterator it=blobs.begin();it!=blobs.end();++it)
delete *it;
return Return_Value::Retry_Event;
}
}
}
for (Blob_Vector::iterator it=blobs.begin();it!=blobs.end();++it) {
msg_Debugging()<<**it<<endl;
(*it)->DeleteInParticles();
}
sigblob->UnsetStatus(blob_status::needs_extraQED);
// build new QED radiation blob
Blob * QEDblob = bloblist->AddBlob(btp::QED_Radiation);
QEDblob->SetTypeSpec("YFS-type_QED_Corrections_to_ME");
for (Particle_Vector::iterator it=fslep.begin();it!=fslep.end();++it) {
// set info back to hard process, otherwise
// check for momentum conservation does not work
(*it)->SetInfo('H');
(*it)->SetStatus(part_status::decayed);
QEDblob->AddToInParticles(*it);
}
// first fill in all LO particles
for (Blob_Vector::iterator it=blobs.begin();it!=blobs.end();++it) {
while ((*it)->NOutP() && (*it)->OutParticle(0)->Info()!='S') {
Particle * part((*it)->RemoveOutParticle(0,true));
QEDblob->AddToOutParticles(part);
}
}
// then append all photons
for (Blob_Vector::iterator it=blobs.begin();it!=blobs.end();++it) {
while ((*it)->NOutP()) {
Particle * part((*it)->RemoveOutParticle(0,true));
QEDblob->AddToOutParticles(part);
}
}
QEDblob->SetStatus(blob_status::needs_hadronization);
for (size_t i=0;i<blobs.size();++i) {
delete blobs[i];
blobs[i]=NULL;
}
return Return_Value::Success;
}