PseudoVertexFitterModule.cc

/**************************************************************************
 * basf2 (Belle II Analysis Software Framework)                           *
 * Author: The Belle II Collaboration                                     *
 *                                                                        *
 * See git log for contributors and copyright holders.                    *
 * This file is licensed under LGPL-3.0, see LICENSE.md.                  *
 **************************************************************************/
 
#include <analysis/modules/PseudoVertexFitter/PseudoVertexFitterModule.h>
#include <analysis/dataobjects/Particle.h>
#include <analysis/dataobjects/ParticleList.h>
#include <framework/database/DBObjPtr.h>
 
using namespace std;
using namespace Belle2;
 
//-----------------------------------------------------------------
//                 Register module
//-----------------------------------------------------------------
 
REG_MODULE(PseudoVertexFitter);
 
//-----------------------------------------------------------------
//                 Implementation
//-----------------------------------------------------------------
 
PseudoVertexFitterModule::PseudoVertexFitterModule() : Module()
{
  // set module description (e.g. insert text)
  setDescription("Pseudo fitter adds a covariance matrix which is sum of the daughter covariance matrices.");
  setPropertyFlags(c_ParallelProcessingCertified);
 
  // Add parameters
  addParam("listName", m_listName, "name of particle list", string(""));
}
 
void PseudoVertexFitterModule::initialize()
{
  if (m_listName == "") {
    B2ERROR("No list name specified! Please enter the list name of the particle you want to add a covariance matrix to.");
    return;
  }
  B2INFO("PseudoVertexFitter: adding covariance matrix to " << m_listName);
 
}
 
void PseudoVertexFitterModule::event()
{
  StoreObjPtr<ParticleList> plist(m_listName);
  if (!plist) {
    B2ERROR("ParticleList " << m_listName << " not found");
    return;
  }
 
  unsigned int n = plist->getListSize();
  for (unsigned i = 0; i < n; i++) {
    Particle* particle = plist->getParticle(i);
 
    bool ok = add_matrix(particle);
 
    if (!ok) particle->setPValue(-1);
  }
}
 
bool PseudoVertexFitterModule::add_matrix(Particle* mother)
{
  // steering starts here
  if (mother->getNDaughters() < 2) return false;
 
  bool ok = false;
 
  const std::vector<Particle*> daughters = mother->getDaughters();
  std::vector<TMatrixFSym> daughter_matrices;
  daughter_matrices.reserve(daughters.size());
  for (auto daughter : daughters) {
    daughter_matrices.push_back(daughter->getMomentumVertexErrorMatrix());
  }
 
  TMatrixFSym mother_errMatrix(7);
  for (int i = 0; i < 7; i++) {
    for (int j = 0; j < 7; j++) {
      for (unsigned int k = 0; k < daughters.size(); k++) {
        mother_errMatrix[i][j] += daughter_matrices[k][i][j];
      }
    }
  }
 
  mother->setMomentumVertexErrorMatrix(mother_errMatrix);
  if (mother->getMomentumVertexErrorMatrix() == mother_errMatrix) {
    ok = true;
  }
  if (!ok) return false;
  return true;
}