StatusCode EDMToHepMCConverter::execute() {
const fcc::MCParticleCollection* particles = m_genphandle.get();
// ownership of event given to data service at the end of execute
HepMC::GenEvent* event = new HepMC::GenEvent;
// conversion of units to EDM standard units:
// First cover the case that hepMC file is not in expected units and then convert to EDM default
double hepmc2EdmLength = conversion_factor(event->length_unit(), gen::hepmcdefault::length) * gen::hepmc2edm::length;
double hepmc2EdmEnergy =
conversion_factor(event->momentum_unit(), gen::hepmcdefault::energy) * gen::hepmc2edm::energy;
for (auto p : *(particles)) {
if (p.status() == 1) { // only final state particles
GenParticle* pHepMC =
new GenParticle(HepMC::FourVector(p.p4().px, p.p4().py, p.p4().pz, p.p4().mass / hepmc2EdmEnergy),
p.pdgId(),
p.status()); // hepmc status code for final state particle
fcc::ConstGenVertex vStart = p.startVertex();
if (p.startVertex().isAvailable()) {
HepMC::GenVertex* v =
new HepMC::GenVertex(HepMC::FourVector(vStart.position().x / hepmc2EdmLength,
vStart.position().y / hepmc2EdmLength,
vStart.position().z / hepmc2EdmLength,
vStart.ctau() / Gaudi::Units::c_light / hepmc2EdmLength));
v->add_particle_out(pHepMC);
event->add_vertex(v);
}
}
}
m_hepmchandle.put(event);
return StatusCode::SUCCESS;
}
StatusCode ConstPtParticleGun::getNextEvent(HepMC::GenEvent& theEvent) {
Gaudi::LorentzVector theFourMomentum;
Gaudi::LorentzVector origin;
// note: pgdid is set in function generateParticle
int thePdgId;
generateParticle(theFourMomentum, origin, thePdgId);
// create HepMC Vertex --
// by calling add_vertex(), the hepmc event is given ownership of the vertex
HepMC::GenVertex* v = new HepMC::GenVertex(HepMC::FourVector(origin.X(), origin.Y(), origin.Z(), origin.T()));
// create HepMC particle --
// by calling add_particle_out(), the hepmc vertex is given ownership of the particle
HepMC::GenParticle* p = new HepMC::GenParticle(
HepMC::FourVector(theFourMomentum.Px(), theFourMomentum.Py(), theFourMomentum.Pz(), theFourMomentum.E()),
thePdgId,
1); // hepmc status code for final state particle
v->add_particle_out(p);
theEvent.add_vertex(v);
theEvent.set_signal_process_vertex(v);
return StatusCode::SUCCESS;
}
int PHSartre::process_event(PHCompositeNode *topNode) {
if (verbosity > 1) cout << "PHSartre::process_event - event: " << _eventcount << endl;
bool passedTrigger = false;
Event *event = NULL;
TLorentzVector *eIn = NULL;
TLorentzVector *pIn = NULL;
TLorentzVector *eOut = NULL;
TLorentzVector *gamma = NULL;
TLorentzVector *vm = NULL;
TLorentzVector *PomOut = NULL;
TLorentzVector *pOut = NULL;
TLorentzVector *vmDecay1 = NULL;
TLorentzVector *vmDecay2 = NULL;
unsigned int preVMDecaySize = 0;
while (!passedTrigger) {
++_gencount;
// Generate a Sartre event
event = _sartre->generateEvent();
//
// If Sartre is run in UPC mode, half of the events needs to be
// rotated around and axis perpendicular to z:
// (only for symmetric events)
//
if(settings->UPC() and settings->A()==settings->UPCA()){
randomlyReverseBeams(event);
}
// for sPHENIX/RHIC p+Au
// (see comments in ReverseBeams)
// reverse when the proton emits the virtual photon
if(settings->UPC() and settings->A()==197){
ReverseBeams(event);
}
// Set pointers to the parts of the event we will need:
eIn = &event->particles[0].p;
pIn = &event->particles[1].p;
eOut = &event->particles[2].p;
gamma = &event->particles[3].p;
vm = &event->particles[4].p;
PomOut = &event->particles[5].p;
pOut = &event->particles[6].p;
// To allow the triggering to work properly, we need to decay the vector meson here
preVMDecaySize = event->particles.size();
if(doPerformDecay) {
if( decay->SetDecay(*vm, 2, daughterMasses) ){
double weight = decay->Generate(); // weight is always 1 here
if ( (weight-1) > FLT_EPSILON) {
cout << "PHSartre: Warning decay weight != 1, weight = " << weight << endl;
}
TLorentzVector *vmDaughter1 = decay->GetDecay(0);
TLorentzVector *vmDaughter2 = decay->GetDecay(1);
event->particles[4].status = 2; // set VM status
Particle vmDC1;
vmDC1.index = event->particles.size();
vmDC1.pdgId = daughterID;
vmDC1.status = 1; // final state
vmDC1.p = *vmDaughter1;
vmDC1.parents.push_back(4);
event->particles.push_back(vmDC1);
vmDecay1 = &event->particles[event->particles.size()-1].p;
Particle vmDC2;
vmDC2.index = event->particles.size();
vmDC2.pdgId = -daughterID;
vmDC2.status = 1; // final state
vmDC2.p = *vmDaughter2;
vmDC2.parents.push_back(4);
event->particles.push_back(vmDC2);
vmDecay2 = &event->particles[event->particles.size()-1].p;
}
else {
cout << "PHSartre: WARNING: Kinematics of Vector Meson does not allow decay!" << endl;
}
}
// test trigger logic
bool andScoreKeeper = true;
if (verbosity > 2) {
cout << "PHSartre::process_event - triggersize: " << _registeredTriggers.size() << endl;
}
for (unsigned int tr = 0; tr < _registeredTriggers.size(); tr++) {
bool trigResult = _registeredTriggers[tr]->Apply(event);
if (verbosity > 2) {
cout << "PHSartre::process_event trigger: "
<< _registeredTriggers[tr]->GetName() << " " << trigResult << endl;
}
if (_triggersOR && trigResult) {
passedTrigger = true;
break;
} else if (_triggersAND) {
andScoreKeeper &= trigResult;
}
if (verbosity > 2 && !passedTrigger) {
cout << "PHSartre::process_event - failed trigger: "
<< _registeredTriggers[tr]->GetName() << endl;
}
}
if ((andScoreKeeper && _triggersAND) || (_registeredTriggers.size() == 0)) {
passedTrigger = true;
}
}
// fill HepMC object with event
HepMC::GenEvent *genevent = new HepMC::GenEvent(HepMC::Units::GEV, HepMC::Units::MM);
// add some information to the event
genevent->set_event_number(_eventcount);
// Set the PDF information
HepMC::PdfInfo pdfinfo;
pdfinfo.set_scalePDF(event->Q2);
genevent->set_pdf_info(pdfinfo);
// We would also like to save:
//
// event->t;
// event->x;
// event->y;
// event->s;
// event->W;
// event->xpom;
// (event->polarization == transverse ? 0 : 1);
// (event->diffractiveMode == coherent ? 0 : 1);
//
// but there doesn't seem to be a good place to do so
// within the HepMC event information?
//
// t, W and Q^2 form a minial set of good variables for diffractive events
// Maybe what I do is record the input particles to the event at the HepMC
// vertices and reconstruct the kinematics from there?
// Create HepMC vertices and add final state particles to them
// First, the emitter(electron)-virtual photon vertex:
HepMC::GenVertex* egammavtx = new HepMC::GenVertex(CLHEP::HepLorentzVector(0.0,0.0,0.0,0.0));
genevent->add_vertex(egammavtx);
egammavtx->add_particle_in(
new HepMC::GenParticle( CLHEP::HepLorentzVector(eIn->Px(),
eIn->Py(),
eIn->Pz(),
eIn->E()),
event->particles[0].pdgId,
3 )
);
HepMC::GenParticle *hgamma = new HepMC::GenParticle( CLHEP::HepLorentzVector(gamma->Px(),
gamma->Py(),
gamma->Pz(),
gamma->E()),
event->particles[3].pdgId,
3 );
egammavtx->add_particle_out(hgamma);
egammavtx->add_particle_out(
new HepMC::GenParticle( CLHEP::HepLorentzVector(eOut->Px(),
eOut->Py(),
eOut->Pz(),
eOut->E()),
event->particles[2].pdgId,
1 )
);
// Next, the hadron-pomeron vertex:
HepMC::GenVertex* ppomvtx = new HepMC::GenVertex(CLHEP::HepLorentzVector(0.0,0.0,0.0,0.0));
genevent->add_vertex(ppomvtx);
ppomvtx->add_particle_in(
new HepMC::GenParticle( CLHEP::HepLorentzVector(pIn->Px(),
pIn->Py(),
pIn->Pz(),
pIn->E()),
event->particles[1].pdgId,
3 )
);
HepMC::GenParticle *hPomOut = new HepMC::GenParticle( CLHEP::HepLorentzVector(PomOut->Px(),
PomOut->Py(),
PomOut->Pz(),
PomOut->E()),
event->particles[5].pdgId,
3 );
ppomvtx->add_particle_out(hPomOut);
// If this is a nuclear breakup, add in the nuclear fragments
// Otherwise, add in the outgoing hadron
//If the event is incoherent, and nuclear breakup is enabled, fill the remnants to the tree
if(settings->enableNuclearBreakup() and event->diffractiveMode == incoherent){
for(unsigned int iParticle=7; iParticle < preVMDecaySize; iParticle++){
if(event->particles[iParticle].status == 1) { // Final-state particle
const Particle& particle = event->particles[iParticle];
ppomvtx->add_particle_out(
new HepMC::GenParticle( CLHEP::HepLorentzVector(particle.p.Px(),
particle.p.Py(),
particle.p.Pz(),
particle.p.E()),
particle.pdgId,
1 )
);
}
}
}
else{
ppomvtx->add_particle_out(
new HepMC::GenParticle( CLHEP::HepLorentzVector(pOut->Px(),
pOut->Py(),
pOut->Pz(),
pOut->E()),
event->particles[6].pdgId,
1 )
);
}
// The Pomeron-Photon vertex
HepMC::GenVertex* gammapomvtx = new HepMC::GenVertex(CLHEP::HepLorentzVector(0.0,0.0,0.0,0.0));
genevent->add_vertex(gammapomvtx);
gammapomvtx->add_particle_in(hgamma);
gammapomvtx->add_particle_in(hPomOut);
int isVMFinal = 1;
if(doPerformDecay) isVMFinal = 2;
HepMC::GenParticle *hvm = new HepMC::GenParticle( CLHEP::HepLorentzVector(vm->Px(),
vm->Py(),
vm->Pz(),
vm->E()),
event->particles[4].pdgId,
isVMFinal ) ;
gammapomvtx->add_particle_out( hvm );
// Add the VM decay to the event
if(doPerformDecay) {
if(vmDecay1 && vmDecay2){
HepMC::GenVertex* fvtx = new HepMC::GenVertex(CLHEP::HepLorentzVector(0.0,0.0,0.0,0.0));
genevent->add_vertex(fvtx);
fvtx->add_particle_in( hvm );
fvtx->add_particle_out(
new HepMC::GenParticle( CLHEP::HepLorentzVector(vmDecay1->Px(),
vmDecay1->Py(),
vmDecay1->Pz(),
vmDecay1->E()),
daughterID,
1 )
);
fvtx->add_particle_out(
new HepMC::GenParticle( CLHEP::HepLorentzVector(vmDecay2->Px(),
vmDecay2->Py(),
vmDecay2->Pz(),
vmDecay2->E()),
-daughterID,
1 )
);
}
else {
cout << "PHSartre: WARNING: Kinematics of Vector Meson does not allow decay!" << endl;
}
}
// pass HepMC to PHNode
PHHepMCGenEvent * success = hepmc_helper . insert_event(genevent);
if (!success) {
cout << "PHSartre::process_event - Failed to add event to HepMC record!" << endl;
return Fun4AllReturnCodes::ABORTRUN;
}
// print outs
if (verbosity > 2) cout << "PHSartre::process_event - FINISHED WHOLE EVENT" << endl;
++_eventcount;
return Fun4AllReturnCodes::EVENT_OK;
}
bool HepMC2_Interface::Sherpa2HepMC(ATOOLS::Blob_List *const blobs,
HepMC::GenEvent& event, double weight)
{
#ifdef USING__HEPMC2__UNITS
event.use_units(HepMC::Units::GEV,
HepMC::Units::MM);
#endif
event.set_event_number(ATOOLS::rpa->gen.NumberOfGeneratedEvents());
size_t decid(11);
std::map<size_t,size_t> decids;
Blob *sp(blobs->FindFirst(btp::Signal_Process));
if (sp) {
Blob_Data_Base *info((*sp)["Decay_Info"]);
if (info) {
DecayInfo_Vector decs(info->Get<DecayInfo_Vector>());
for (size_t i(0);i<decs.size();++i) decids[decs[i]->m_id]=++decid;
}
}
m_blob2genvertex.clear();
m_particle2genparticle.clear();
HepMC::GenVertex * vertex;
std::vector<HepMC::GenParticle*> beamparticles;
for (ATOOLS::Blob_List::iterator blit=blobs->begin();
blit!=blobs->end();++blit) {
if (Sherpa2HepMC(*(blit),vertex,decids)) {
event.add_vertex(vertex);
if ((*blit)->Type()==ATOOLS::btp::Signal_Process) {
if ((**blit)["NLO_subeventlist"]) {
THROW(fatal_error,"Events containing correlated subtraction events"
+std::string(" cannot be translated into the full HepMC event")
+std::string(" format.\n")
+std::string(" Try 'EVENT_OUTPUT=HepMC_Short' instead."));
}
event.set_signal_process_vertex(vertex);
if((*blit)->NInP()==2) {
kf_code fl1=(*blit)->InParticle(0)->Flav().HepEvt();
kf_code fl2=(*blit)->InParticle(1)->Flav().HepEvt();
double x1=(*blit)->InParticle(0)->Momentum()[0]/rpa->gen.PBeam(0)[0];
double x2=(*blit)->InParticle(1)->Momentum()[0]/rpa->gen.PBeam(1)[0];
double q(0.0), p1(0.0), p2(0.0);
Blob_Data_Base *facscale((**blit)["Factorisation_Scale"]);
if (facscale) q=sqrt(facscale->Get<double>());
Blob_Data_Base *xf1((**blit)["XF1"]);
Blob_Data_Base *xf2((**blit)["XF2"]);
if (xf1) p1=xf1->Get<double>();
if (xf2) p2=xf2->Get<double>();
HepMC::PdfInfo pdfinfo(fl1, fl2, x1, x2, q, p1, p2);
event.set_pdf_info(pdfinfo);
}
}
else if ((*blit)->Type()==ATOOLS::btp::Beam ||
(*blit)->Type()==ATOOLS::btp::Bunch) {
for (HepMC::GenVertex::particles_in_const_iterator
pit=vertex->particles_in_const_begin();
pit!=vertex->particles_in_const_end(); ++pit) {
if ((*pit)->production_vertex()==NULL) {
beamparticles.push_back(*pit);
}
}
}
}
}
if (beamparticles.size()==2) {
event.set_beam_particles(beamparticles[0],beamparticles[1]);
}
std::vector<double> weights;
weights.push_back(weight);
if (sp) {
Blob_Data_Base *info((*sp)["MEWeight"]);
if (!info) THROW(fatal_error,"Missing weight info.");
double meweight(info->Get<double>());
weights.push_back(meweight);
Blob_Data_Base *ofni((*sp)["Weight_Norm"]);
if (!ofni) THROW(fatal_error,"Missing weight normalisation.");
double weightnorm(ofni->Get<double>());
weights.push_back(weightnorm);
ofni=(*sp)["Trials"];
if (!ofni) THROW(fatal_error,"Missing nof trials.");
double trials(ofni->Get<double>());
weights.push_back(trials);
}
event.weights()=weights;
return true;
}
bool HepMC2_Interface::Sherpa2ShortHepMC(ATOOLS::Blob_List *const blobs,
HepMC::GenEvent& event, double weight)
{
#ifdef USING__HEPMC2__UNITS
event.use_units(HepMC::Units::GEV,
HepMC::Units::MM);
#endif
event.set_event_number(ATOOLS::rpa->gen.NumberOfGeneratedEvents());
HepMC::GenVertex * vertex=new HepMC::GenVertex();
std::vector<HepMC::GenParticle*> beamparticles;
std::vector<std::pair<HepMC::FourVector,int> > beamparts,
remnantparts1, remnantparts2;
Blob *sp(blobs->FindFirst(btp::Signal_Process));
NLO_subevtlist* subevtlist(NULL);
ME_wgtinfo* wgtinfo(0);
if (sp) {
Blob_Data_Base* seinfo=(*sp)["ME_wgtinfo"];
if (seinfo) wgtinfo=seinfo->Get<ME_wgtinfo*>();
Blob_Data_Base * bdb((*sp)["NLO_subeventlist"]);
if (bdb) subevtlist=bdb->Get<NLO_subevtlist*>();
}
for (ATOOLS::Blob_List::iterator blit=blobs->begin();
blit!=blobs->end();++blit) {
Blob* blob=*blit;
for (int i=0;i<blob->NInP();i++) {
if (blob->InParticle(i)->ProductionBlob()==NULL) {
Particle* parton=blob->InParticle(i);
ATOOLS::Vec4D mom = parton->Momentum();
HepMC::FourVector momentum(mom[1],mom[2],mom[3],mom[0]);
HepMC::GenParticle* inpart =
new HepMC::GenParticle(momentum,parton->Flav().HepEvt(),2);
vertex->add_particle_in(inpart);
// distinct because SHRIMPS has no bunches for some reason
if (blob->Type()==btp::Beam || blob->Type()==btp::Bunch) {
beamparticles.push_back(inpart);
beamparts.push_back(std::make_pair(momentum,parton->Flav().HepEvt()));
}
}
}
for (int i=0;i<blob->NOutP();i++) {
if (blob->OutParticle(i)->DecayBlob()==NULL) {
Particle* parton=blob->OutParticle(i);
ATOOLS::Vec4D mom = parton->Momentum();
HepMC::FourVector momentum(mom[1],mom[2],mom[3],mom[0]);
HepMC::GenParticle* outpart =
new HepMC::GenParticle(momentum,parton->Flav().HepEvt(),1);
vertex->add_particle_out(outpart);
if (blob->Type()==btp::Beam) {
if (mom[3]>0)
remnantparts1.push_back(std::make_pair(momentum,
parton->Flav().HepEvt()));
else if (mom[3]<0)
remnantparts2.push_back(std::make_pair(momentum,
parton->Flav().HepEvt()));
else THROW(fatal_error,"Ill defined beam remnants.");
}
}
}
if ((*blit)->Type()==ATOOLS::btp::Signal_Process) {
if((*blit)->NInP()==2) {
kf_code fl1=(*blit)->InParticle(0)->Flav().HepEvt();
kf_code fl2=(*blit)->InParticle(1)->Flav().HepEvt();
double x1=(*blit)->InParticle(0)->Momentum()[0]/rpa->gen.PBeam(0)[0];
double x2=(*blit)->InParticle(1)->Momentum()[0]/rpa->gen.PBeam(1)[0];
double q(0.0), p1(0.0), p2(0.0);
Blob_Data_Base *facscale((**blit)["Factorisation_Scale"]);
if (facscale) q=sqrt(facscale->Get<double>());
Blob_Data_Base *xf1((**blit)["XF1"]);
Blob_Data_Base *xf2((**blit)["XF2"]);
if (xf1) p1=xf1->Get<double>();
if (xf2) p2=xf2->Get<double>();
HepMC::PdfInfo pdfinfo(fl1, fl2, x1, x2, q, p1, p2);
event.set_pdf_info(pdfinfo);
}
}
}
event.add_vertex(vertex);
if (beamparticles.size()==2) {
event.set_beam_particles(beamparticles[0],beamparticles[1]);
}
std::vector<double> weights; weights.push_back(weight);
if (sp && !subevtlist) {
Blob_Data_Base *info;
info=((*sp)["MEWeight"]);
if (!info) THROW(fatal_error,"Missing weight info.");
double meweight(info->Get<double>());
weights.push_back(meweight);
info=((*sp)["Weight_Norm"]);
if (!info) THROW(fatal_error,"Missing weight normalisation.");
double weightnorm(info->Get<double>());
weights.push_back(weightnorm);
info=(*sp)["Trials"];
if (!info) THROW(fatal_error,"Missing nof trials.");
double trials(info->Get<double>());
weights.push_back(trials);
//alphaS value && power
double rscale2 = (*sp)["Renormalization_Scale"]->Get<double>();
double alphaS = MODEL::s_model->ScalarFunction("alpha_S",rscale2);
event.set_alphaQCD(alphaS);
double aSpower = ((*sp)["OQCD"])->Get<int>();
weights.push_back(aSpower);
if (wgtinfo) {
//dump weight_0
weights.push_back(wgtinfo->m_w0);
//dump number of usr weights
weights.push_back(wgtinfo->m_nx);
//store xprimes
weights.push_back(wgtinfo->m_y1);
weights.push_back(wgtinfo->m_y2);
//fill in usr weights
for (int i=0;i<wgtinfo->m_nx;i++) {
weights.push_back(wgtinfo->p_wx[i]);
}
}
}
event.weights()=weights;
if (subevtlist) {
// build GenEvent for all subevts (where only the signal is available)
// use stored beam & remnant particles from above
// sub->m_flip==1 -> momenta need to be inverted for analyses
for (size_t i(0);i<subevtlist->size();++i) {
NLO_subevt * sub((*subevtlist)[i]);
if (sub->m_result==0.) continue;
HepMC::GenVertex * subvertex(new HepMC::GenVertex());
HepMC::GenEvent * subevent(new HepMC::GenEvent());
// assume that only 2->(n-2) processes
HepMC::GenParticle *beam[2];
if (beamparts.size()==2) {
for (size_t j(0);j<beamparts.size();++j) {
beam[j] = new HepMC::GenParticle(beamparts[j].first,
beamparts[j].second,2);
subvertex->add_particle_in(beam[j]);
}
}
else {
const ATOOLS::Vec4D *mom(sub->p_mom);
const ATOOLS::Flavour *fl(sub->p_fl);
for (size_t j(0);j<2;++j) {
HepMC::FourVector momentum;
momentum.set( mom[j][1], mom[j][2], mom[j][3],mom[j][0]);
ATOOLS::Flavour flc(fl[j]);
HepMC::GenParticle* inpart
= new HepMC::GenParticle(momentum,flc.HepEvt(),2);
subvertex->add_particle_in(inpart);
}
}
const ATOOLS::Vec4D *mom(sub->p_mom);
const ATOOLS::Flavour *fl(sub->p_fl);
for (size_t j(2);j<(*subevtlist)[i]->m_n;++j) {
HepMC::FourVector momentum;
momentum.set( mom[j][1], mom[j][2], mom[j][3],mom[j][0]);
ATOOLS::Flavour flc(fl[j]);
HepMC::GenParticle* outpart
= new HepMC::GenParticle(momentum,flc.HepEvt(),1);
subvertex->add_particle_out(outpart);
}
// if beamremnants are present:
// scale beam remnants of real event for energy momentum conservation :
// flavours might not add up properly for sub events,
// but who cares. they go down the beam pipe.
// also assume they are all massless :
// this will give momentum conservation violations
// which are collider dependent only
//
// for real event (as constructed in BRH) :
//
// P = p + \sum r_i with P^2 = m^2 and r_i^2 = p^2 = 0
//
// further P = ( P^0 , 0 , 0 , P^z )
// p = ( p , 0 , 0 , p )
// r_i = ( r_i , 0 , 0 , r_i )
//
// => P^0 = p + \sum r_i
// P^z = \sqrt{(P^0)^2 - m^2} < p + \sum r_i
//
// in a mass-symmetric collider, the excess is the same for both beams
// ensuring momentum conservation
//
// for sub event (constructed here):
//
// P = p~ + \sum r_i~ = p~ + \sum u*r_i
//
// where u = ( P^0 - p^0~ ) / \sum r_i^0
//
// again, the r_i~ = u*r_i are constructed such that
//
// => P^0 = p~ + \sum u*r_i
// P^z = \sqrt{(P^0)^2 - m^2} < p~ + \sum u*r_i = p + \sum r_i
//
// leading to the same momentum conservation violations per beam
//
if (remnantparts1.size()!=0 && remnantparts2.size()!=0) {
double res1(0.),res2(0.);
for (size_t j(0);j<remnantparts1.size();++j) {
res1+=remnantparts1[j].first.e();
}
for (size_t j(0);j<remnantparts2.size();++j) {
res2+=remnantparts2[j].first.e();
}
ATOOLS::Vec4D hardparton[2];
for (size_t j(0);j<2;++j) {
hardparton[j]=ATOOLS::Vec4D(mom[j][0],Vec3D( mom[j]));
}
// incoming partons might need to be flipped due to particle sorting
bool flip(hardparton[0][3]<0);
double u1((beamparts[0].first.e()-hardparton[flip?1:0][0])/res1);
double u2((beamparts[1].first.e()-hardparton[flip?0:1][0])/res2);
// filling
for (size_t j(0);j<remnantparts1.size();++j) {
HepMC::FourVector momentum(u1*remnantparts1[j].first.px(),
u1*remnantparts1[j].first.py(),
u1*remnantparts1[j].first.pz(),
u1*remnantparts1[j].first.e());
HepMC::GenParticle* outpart
= new HepMC::GenParticle(momentum,remnantparts1[j].second,1);
subvertex->add_particle_out(outpart);
}
for (size_t j(0);j<remnantparts2.size();++j) {
HepMC::FourVector momentum(u2*remnantparts2[j].first.px(),
u2*remnantparts2[j].first.py(),
u2*remnantparts2[j].first.pz(),
u2*remnantparts2[j].first.e());
HepMC::GenParticle* outpart
= new HepMC::GenParticle(momentum,remnantparts2[j].second,1);
subvertex->add_particle_out(outpart);
}
if (beamparticles.size()==2) {
subevent->set_beam_particles(beam[0],beam[1]);
}
}
subevent->add_vertex(subvertex);
// not enough info in subevents to set PDFInfo properly,
// so set only flavours, x1, x2, and q from the Signal_Process
HepMC::PdfInfo subpdfinfo(*event.pdf_info());
double q = sqrt(sub->m_mu2[stp::fac]);
if (q!=0. && q != subpdfinfo.scalePDF())
subpdfinfo.set_scalePDF(q);
if (sub->m_xf1) subpdfinfo.set_pdf1(sub->m_xf1);
if (sub->m_xf2) subpdfinfo.set_pdf2(sub->m_xf2);
subevent->set_pdf_info(subpdfinfo);
// add weight
std::vector<double> subweight; subweight.push_back(sub->m_result);
Blob_Data_Base *info;
info=((*sp)["MEWeight"]);
if (!info) THROW(fatal_error,"Missing weight info.");
double meweight(info->Get<double>());
subweight.push_back(meweight);
info=((*sp)["Weight_Norm"]);
if (!info) THROW(fatal_error,"Missing weight normalisation.");
double weightnorm(info->Get<double>());
subweight.push_back(weightnorm);
info=(*sp)["Trials"];
if (!info) THROW(fatal_error,"Missing nof trials.");
double trials(info->Get<double>());
subweight.push_back(trials);
//alphaS value && power
double alphaS = MODEL::s_model->ScalarFunction("alpha_S",sub->m_mu2[stp::ren]);
subevent->set_alphaQCD(alphaS);
double aSpower = ((*sp)["OQCD"])->Get<int>();
subweight.push_back(aSpower);
subweight.push_back(sub->m_mewgt);
if (wgtinfo) {
//dump number of usr weights
subweight.push_back(wgtinfo->m_nx);
//store xprimes
subweight.push_back(wgtinfo->m_y1);
subweight.push_back(wgtinfo->m_y2);
//fill in usr weights
for (int i=0;i<wgtinfo->m_nx;i++) {
subweight.push_back(wgtinfo->p_wx[i]);
}
}
//
subevent->weights()=subweight;
// set the event number (could be used to identify correlated events)
subevent->set_event_number(ATOOLS::rpa->gen.NumberOfGeneratedEvents());
m_subeventlist.push_back(subevent);
}
}
return true;
}