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#include "GeneratorInterface/GenFilters/plugins/PythiaDauVFilterMatchID.h"
#include "SimDataFormats/GeneratorProducts/interface/HepMCProduct.h"
#include <iostream>
#include <memory>
#include <vector>
using namespace edm;
using namespace std;
using namespace Pythia8;
PythiaDauVFilterMatchID::PythiaDauVFilterMatchID(const edm::ParameterSet& iConfig)
: fVerbose(iConfig.getUntrackedParameter("verbose", 0)),
token_(consumes<edm::HepMCProduct>(
edm::InputTag(iConfig.getUntrackedParameter("moduleLabel", std::string("generator")), "unsmeared"))),
particleID(iConfig.getUntrackedParameter("ParticleID", 0)),
motherID(iConfig.getUntrackedParameter("MotherID", 0)),
chargeconju(iConfig.getUntrackedParameter("ChargeConjugation", true)),
ndaughters(iConfig.getUntrackedParameter("NumberDaughters", 0)),
maxptcut(iConfig.getUntrackedParameter("MaxPt", 14000.)) {
//now do what ever initialization is needed
vector<int> defdauID;
defdauID.push_back(0);
dauIDs = iConfig.getUntrackedParameter<vector<int> >("DaughterIDs", defdauID);
vector<double> defminptcut;
defminptcut.push_back(0.);
minptcut = iConfig.getUntrackedParameter<vector<double> >("MinPt", defminptcut);
vector<double> defminetacut;
defminetacut.push_back(-10.);
minetacut = iConfig.getUntrackedParameter<vector<double> >("MinEta", defminetacut);
vector<double> defmaxetacut;
defmaxetacut.push_back(10.);
maxetacut = iConfig.getUntrackedParameter<vector<double> >("MaxEta", defmaxetacut);
edm::LogInfo("PythiaDauVFilterMatchID")
<< "----------------------------------------------------------------------" << endl;
edm::LogInfo("PythiaDauVFilterMatchID") << "--- PythiaDauVFilterMatchID" << endl;
for (unsigned int i = 0; i < dauIDs.size(); ++i) {
edm::LogInfo("PythiaDauVFilterMatchID")
<< "ID: " << dauIDs[i] << " pT > " << minptcut[i] << " " << minetacut[i] << " eta < " << maxetacut[i] << endl;
}
edm::LogInfo("PythiaDauVFilterMatchID") << "maxptcut = " << maxptcut << endl;
edm::LogInfo("PythiaDauVFilterMatchID") << "particleID = " << particleID << endl;
edm::LogInfo("PythiaDauVFilterMatchID") << "motherID = " << motherID << endl;
// create pythia8 instance to access particle data
edm::LogInfo("PythiaDauVFilterMatchID") << "Creating pythia8 instance for particle properties" << endl;
if (!fLookupGen.get())
fLookupGen = std::make_unique<Pythia>();
}
PythiaDauVFilterMatchID::~PythiaDauVFilterMatchID() {
// do anything here that needs to be done at desctruction time
// (e.g. close files, deallocate resources etc.)
}
//
// member functions
//
// ------------ method called to produce the data ------------
bool PythiaDauVFilterMatchID::filter(edm::StreamID, edm::Event& iEvent, const edm::EventSetup& iSetup) const {
using namespace edm;
bool accepted = false;
Handle<HepMCProduct> evt;
iEvent.getByToken(token_, evt);
int OK(1);
vector<int> vparticles;
HepMC::GenEvent* myGenEvent = new HepMC::GenEvent(*(evt->GetEvent()));
if (fVerbose > 5) {
edm::LogInfo("PythiaDauVFilterMatchID") << "looking for " << particleID << endl;
}
for (HepMC::GenEvent::particle_iterator p = myGenEvent->particles_begin(); p != myGenEvent->particles_end(); ++p) {
if ((*p)->pdg_id() != particleID)
continue;
// -- Check for mother of this particle
if (0 != motherID) {
OK = 0;
for (HepMC::GenVertex::particles_in_const_iterator des = (*p)->production_vertex()->particles_in_const_begin();
des != (*p)->production_vertex()->particles_in_const_end();
++des) {
if (fVerbose > 10) {
edm::LogInfo("PythiaDauVFilterMatchID")
<< "mother: " << (*des)->pdg_id() << " pT: " << (*des)->momentum().perp()
<< " eta: " << (*des)->momentum().eta() << endl;
}
if (abs(motherID) == abs((*des)->pdg_id())) {
OK = 1;
break;
}
}
}
if (0 == OK)
continue;
//generate targets
std::vector<decayTarget> targets;
for (unsigned int i = 0; i < dauIDs.size(); i++) {
decayTarget target;
target.pdgID = dauIDs[i];
target.minPt = minptcut[i];
target.maxPt = maxptcut;
target.minEta = minetacut[i];
target.maxEta = maxetacut[i];
targets.push_back(target);
}
if (fVerbose > 10) {
edm::LogInfo("PythiaDauVFilterMatchID") << "created target: ";
for (unsigned int i = 0; i < targets.size(); i++) {
edm::LogInfo("PythiaDauVFilterMatchID") << targets[i].pdgID << " ";
}
edm::LogInfo("PythiaDauVFilterMatchID") << endl;
}
// -- check for daugthers
int ndau = 0;
if (fVerbose > 5) {
edm::LogInfo("PythiaDauVFilterMatchID") << "found ID: " << (*p)->pdg_id() << " pT: " << (*p)->momentum().perp()
<< " eta: " << (*p)->momentum().eta() << endl;
}
vparticles.push_back((*p)->pdg_id());
if ((*p)->end_vertex()) {
for (HepMC::GenVertex::particle_iterator des = (*p)->end_vertex()->particles_begin(HepMC::children);
des != (*p)->end_vertex()->particles_end(HepMC::children);
++des) {
if (TMath::Abs((*des)->pdg_id()) == 22) {
continue;
}
++ndau;
if (fVerbose > 5) {
edm::LogInfo("PythiaDauVFilterMatchID") << "ID: " << (*des)->pdg_id() << " pT: " << (*des)->momentum().perp()
<< " eta: " << (*des)->momentum().eta() << endl;
}
{ // protect matchedIdx
int matchedIdx = -1;
for (unsigned int i = 0; i < targets.size(); i++) {
if ((*des)->pdg_id() != targets[i].pdgID) {
continue;
}
if (fVerbose > 5) {
edm::LogInfo("PythiaDauVFilterMatchID") << "i = " << i << " pT = " << (*des)->momentum().perp()
<< " eta = " << (*des)->momentum().eta() << endl;
}
if ((*des)->momentum().perp() > targets[i].minPt && (*des)->momentum().perp() < targets[i].maxPt &&
(*des)->momentum().eta() > targets[i].minEta && (*des)->momentum().eta() < targets[i].maxEta) {
vparticles.push_back((*des)->pdg_id());
if (fVerbose > 2) {
edm::LogInfo("PythiaDauVFilterMatchID")
<< " accepted this particle " << (*des)->pdg_id() << " pT = " << (*des)->momentum().perp()
<< " eta = " << (*des)->momentum().eta() << endl;
}
matchedIdx = i;
break;
}
}
if (matchedIdx > -1) {
targets.erase(targets.begin() + matchedIdx);
}
if (fVerbose > 10) {
edm::LogInfo("PythiaDauVFilterMatchID") << "remaining targets: ";
for (unsigned int i = 0; i < targets.size(); i++) {
edm::LogInfo("PythiaDauVFilterMatchID") << targets[i].pdgID << " ";
}
edm::LogInfo("PythiaDauVFilterMatchID") << endl;
}
}
}
}
if (ndau == ndaughters && targets.empty()) {
accepted = true;
if (fVerbose > 0) {
edm::LogInfo("PythiaDauVFilterMatchID") << " accepted this decay: ";
for (unsigned int iv = 0; iv < vparticles.size(); ++iv)
edm::LogInfo("PythiaDauVFilterMatchID") << vparticles[iv] << " ";
edm::LogInfo("PythiaDauVFilterMatchID") << " from mother = " << motherID << endl;
}
break;
}
}
int anti_particleID = -particleID;
if (!(fLookupGen->particleData.isParticle(anti_particleID))) {
anti_particleID = 0;
if (fVerbose > 5)
edm::LogInfo("PythiaDauVFilterMatchID")
<< "Particle " << particleID << " is its own anti-particle, skipping further testing " << endl;
}
if (!accepted && chargeconju && anti_particleID) {
OK = 1;
for (HepMC::GenEvent::particle_iterator p = myGenEvent->particles_begin(); p != myGenEvent->particles_end(); ++p) {
if ((*p)->pdg_id() != anti_particleID)
continue;
// -- Check for mother of this particle
if (0 != motherID) {
OK = 0;
for (HepMC::GenVertex::particles_in_const_iterator des = (*p)->production_vertex()->particles_in_const_begin();
des != (*p)->production_vertex()->particles_in_const_end();
++des) {
if (fVerbose > 10) {
edm::LogInfo("PythiaDauVFilterMatchID")
<< "mother: " << (*des)->pdg_id() << " pT: " << (*des)->momentum().perp()
<< " eta: " << (*des)->momentum().eta() << endl;
}
if (abs(motherID) == abs((*des)->pdg_id())) {
OK = 1;
break;
}
}
}
if (0 == OK)
continue;
//generate anti targets
std::vector<decayTarget> targets;
for (unsigned int i = 0; i < dauIDs.size(); i++) {
decayTarget target;
int IDanti = -dauIDs[i];
if (!(fLookupGen->particleData.isParticle(IDanti)))
IDanti = dauIDs[i];
target.pdgID = IDanti;
target.minPt = minptcut[i];
target.maxPt = maxptcut;
target.minEta = minetacut[i];
target.maxEta = maxetacut[i];
targets.push_back(target);
}
if (fVerbose > 10) {
edm::LogInfo("PythiaDauVFilterMatchID") << "created anti target: ";
for (unsigned int i = 0; i < targets.size(); i++) {
edm::LogInfo("PythiaDauVFilterMatchID") << targets[i].pdgID << " ";
}
edm::LogInfo("PythiaDauVFilterMatchID") << endl;
}
if (fVerbose > 5) {
edm::LogInfo("PythiaDauVFilterMatchID") << "found ID: " << (*p)->pdg_id() << " pT: " << (*p)->momentum().perp()
<< " eta: " << (*p)->momentum().eta() << endl;
}
vparticles.push_back((*p)->pdg_id());
int ndau = 0;
if ((*p)->end_vertex()) {
for (HepMC::GenVertex::particle_iterator des = (*p)->end_vertex()->particles_begin(HepMC::children);
des != (*p)->end_vertex()->particles_end(HepMC::children);
++des) {
if (TMath::Abs((*des)->pdg_id()) == 22) {
continue;
}
++ndau;
if (fVerbose > 5) {
edm::LogInfo("PythiaDauVFilterMatchID")
<< "ID: " << (*des)->pdg_id() << " pT: " << (*des)->momentum().perp()
<< " eta: " << (*des)->momentum().eta() << endl;
}
{ // protect matchedIdx
int matchedIdx = -1;
for (unsigned int i = 0; i < targets.size(); i++) {
if ((*des)->pdg_id() != targets[i].pdgID) {
continue;
}
if (fVerbose > 5) {
edm::LogInfo("PythiaDauVFilterMatchID") << "i = " << i << " pT = " << (*des)->momentum().perp()
<< " eta = " << (*des)->momentum().eta() << endl;
}
if ((*des)->momentum().perp() > targets[i].minPt && (*des)->momentum().perp() < targets[i].maxPt &&
(*des)->momentum().eta() > targets[i].minEta && (*des)->momentum().eta() < targets[i].maxEta) {
vparticles.push_back((*des)->pdg_id());
if (fVerbose > 2) {
edm::LogInfo("PythiaDauVFilterMatchID")
<< " accepted this particle " << (*des)->pdg_id() << " pT = " << (*des)->momentum().perp()
<< " eta = " << (*des)->momentum().eta() << endl;
}
matchedIdx = i;
break;
}
}
if (matchedIdx > -1) {
targets.erase(targets.begin() + matchedIdx);
}
if (fVerbose > 10) {
edm::LogInfo("PythiaDauVFilterMatchID") << "remaining targets: ";
for (unsigned int i = 0; i < targets.size(); i++) {
edm::LogInfo("PythiaDauVFilterMatchID") << targets[i].pdgID << " ";
}
edm::LogInfo("PythiaDauVFilterMatchID") << endl;
}
}
}
}
if (ndau == ndaughters && targets.empty()) {
accepted = true;
if (fVerbose > 0) {
edm::LogInfo("PythiaDauVFilterMatchID") << " accepted this decay: ";
for (unsigned int iv = 0; iv < vparticles.size(); ++iv)
edm::LogInfo("PythiaDauVFilterMatchID") << vparticles[iv] << " ";
edm::LogInfo("PythiaDauVFilterMatchID") << " from mother = " << motherID << endl;
}
break;
}
}
}
delete myGenEvent;
return accepted;
}
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