double PFReconstructor::nsigmaHcal(const Cluster& cluster) const {
/*'WARNING CMS SPECIFIC!
//http://cmslxr.fnal.gov/source/RecoParticleFlow/PFProducer/src/PFAlgo.cc#3365
'''*/
return 1. + exp(-cluster.energy() / 100.);
}
bool CMSHCAL::acceptance(const Cluster& cluster) const {
double energy = cluster.energy();
double eta = fabs(cluster.eta());
bool accept = false;
auto& pars = m_acceptanceParameters;
if (eta < m_etaCrack) {
if (energy > pars[0])
accept = rootrandom::Random::uniform(0, 1) < (pars[1] / (1 + exp((energy + pars[2]) / (pars[3]))));
} else if (eta < pars[4]) {
if (energy > pars[5]) {
if (energy < pars[6])
accept = rootrandom::Random::uniform(0, 1) < (pars[7] + pars[8] * energy + pars[9] * (pow(energy, 2)));
else
accept = rootrandom::Random::uniform(0, 1) < (pars[10] / (1 + exp((energy + pars[11]) / pars[12])));
}
} else if (eta < pars[13] && energy > pars[14])
accept = true;
/*if (eta < m_etaCrack) {
if (energy > 1.) accept = rootrandom::Random::uniform(0, 1) < (1 / (1 + exp((energy - 1.93816) / (-1.75330))));
} else if (eta < 3.) {
if (energy > 1.1) {
if (energy < 10.)
accept = rootrandom::Random::uniform(0, 1) < (1.05634 - 1.66943e-01 * energy + 1.05997e-02 * (pow(energy, 2)));
else
accept = rootrandom::Random::uniform(0, 1) < (8.09522e-01 / (1 + exp((energy - 9.90855) / -5.30366)));
}
} else if (eta < 5. && energy > 7)
accept = true;*/
return accept;
}
bool ClicECAL::acceptance(const Cluster& cluster) const {
double energy = cluster.energy();
double eta = fabs(cluster.eta());
if (eta < volumeCylinder().inner().etaJunction())
return (energy > m_emin[0]); // barrel
else if (eta < m_etaAcceptance)
return energy > m_emin[1]; // endcap
else
return false;
}
bool CMSECAL::acceptance(const Cluster& cluster) const {
double energy = cluster.energy();
double eta = fabs(cluster.eta());
if (eta < m_etaCrack)
return energy > m_emin[kBarrel];
else if (eta < m_etaAcceptanceThreshold) // 2.93)
return ((energy > m_emin[kEndCap]) & (cluster.pt() > m_ptAcceptanceThreshold)); // 0.2));
else
return false;
}
SimParticle PFReconstructor::reconstructCluster(const Cluster& cluster, papas::Layer layer, double energy,
const TVector3& vertex) {
// construct a photon if it is an ecal
// construct a neutral hadron if it is an hcal
int pdgId = 0;
if (energy < 0) {
energy = cluster.energy();
}
// double charge = ParticlePData::particleCharge(pdgId);
if (layer == papas::Layer::kEcal) {
pdgId = 22; // photon
} else if (layer == papas::Layer::kHcal) {
pdgId = 130; // K0
} else {
// TODO raise ValueError('layer must be equal to ecal_in or hcal_in')
}
// assert(pdg_id)
double mass = ParticlePData::particleMass(pdgId);
if (energy < mass) // null particle
return SimParticle();
double momentum;
if (mass == 0) {
momentum = energy;
} //#avoid sqrt for zero mass
else {
momentum = sqrt(pow(energy, 2) - pow(mass, 2));
}
TVector3 p3 = cluster.position().Unit() * momentum;
TLorentzVector p4 = TLorentzVector(p3.Px(), p3.Py(), p3.Pz(), energy); // mass is not accurate here
IdType newid = Id::makeRecParticleId();
SimParticle particle{newid, pdgId, 0., p4, vertex};
// TODO discuss with Colin
particle.path()->addPoint(papas::Position::kEcalIn, cluster.position());
if (layer == papas::Layer::kHcal) { // alice not sure
particle.path()->addPoint(papas::Position::kHcalIn, cluster.position());
}
// alice: Colin this may be a bit strange
// because we can make a photon with a
// path where the point is actually that
// of the hcal?
// nb this only is problem if the cluster and the assigned layer are different
// particle.setPath(path);
// particle.clusters[layer] = cluster # not sure about this either when hcal is used to make an ecal cluster?
m_locked[cluster.id()] = true; // alice : just OK but not nice if hcal used to make ecal.
// TODO make more flexible and able to detect what type of cluster
PDebug::write("Made Reconstructed{} from Merged{}", particle, cluster);
return particle;
}
double PFReconstructor::neutralHadronEnergyResolution(const Cluster& hcal) const {
/*WARNING CMS SPECIFIC!
//http://cmslxr.fnal.gov/source/RecoParticleFlow/PFProducer/src/PFAlgo.cc#3350
*/
double energy = fmax(hcal.energy(), 1.);
double stoch = 1.02;
double kconst = 0.065;
if (fabs(hcal.position().Eta()) > 1.48) {
stoch = 1.2;
kconst = 0.028;
}
double resol = sqrt(pow(stoch, 2) / energy + pow(kconst, 2));
return resol;
}
/* Decides whether a cluster will be seen by a detector
@param cluster the cluster to be analysed
@return true is cluster is detected, false it if is too small to be seen
*/
bool CMSHCAL::acceptance(const Cluster& cluster) const {
double energy = cluster.energy();
double eta = fabs(cluster.eta());
bool accept = false;
auto rUniform = randomgen::RandUniform(0, 1);
if (eta < m_etaCrack) {
if (energy > 1.) accept = rUniform.next() < (1 / (1 + exp((energy - 1.93816) / (-1.75330))));
} else if (eta < 3.) {
if (energy > 1.1) {
if (energy < 10.)
accept = rUniform.next() < (1.05634 - 1.66943e-01 * energy + 1.05997e-02 * (pow(energy, 2)));
else
accept = rUniform.next() < (8.09522e-01 / (1 + exp((energy - 9.90855) / -5.30366)));
}
} else if (eta < 5. && energy > 7)
accept = true;
return accept;
}
