message: add invariant mass of pair
diff: @@ -133,6 +133,14 @@ void AliFemtoDreamZVtxMultContainer::PairParticlesSE(
  bool is_newpcrm = part1.IsRemovedByNewPC() || part2.IsRemovedByNewPC();
  bool is_crosspcrm = part1.IsRemovedByCrossPC() || part2.IsRemovedByCrossPC();
  + // auto p1 = TLorentzVector(part1.GetMomentum(), TMath::Sqrt(part1.GetInvMass() * part1.GetInvMass() + part1.GetMomentum().Mag2()));
  + // auto p2 = TLorentzVector(part2.GetMomentum(), TMath::Sqrt(part2.GetInvMass() * part2.GetInvMass() + part2.GetMomentum().Mag2()));
  + // float inv_mass = (p1 + p2).Mag();
  +
  + // auto p1pdg = TLorentzVector(part1.GetMomentum(), TMath::Sqrt(0.139 * 0.139 + part1.GetMomentum().Mag2()));
  + // auto p2pdg = TLorentzVector(part2.GetMomentum(), TMath::Sqrt(2.010 * 2.010 + part2.GetMomentum().Mag2()));
  + // float inv_masspdg = (p1pdg + p2pdg).Mag();
  +
  // load dmeson info
  int heavy_mult = part2.GetParticleMult();
  float heavy_invmass = part2.GetInvMass();
  @@ -171,6 +179,8 @@ void AliFemtoDreamZVtxMultContainer::PairParticlesSE(
  if (tree->FindBranch("is_oldpcrm")) tree->SetBranchAddress("is_oldpcrm", &is_oldpcrm);
  if (tree->FindBranch("is_newpcrm")) tree->SetBranchAddress("is_newpcrm", &is_newpcrm);
  if (tree->FindBranch("is_crosspcrm")) tree->SetBranchAddress("is_crosspcrm", &is_crosspcrm);
  + // if (tree->FindBranch("inv_mass")) tree->SetBranchAddress("inv_mass", &inv_mass);
  + // if (tree->FindBranch("inv_masspdg")) tree->SetBranchAddress("inv_masspdg", &inv_masspdg);
  // heavy particle
  @@ -323,6 +333,8 @@ void AliFemtoDreamZVtxMultContainer::PairParticlesME(
  if (tree->FindBranch("is_oldpcrm")) tree->SetBranchAddress("is_oldpcrm", &is_oldpcrm);
  if (tree->FindBranch("is_newpcrm")) tree->SetBranchAddress("is_newpcrm", &is_newpcrm);
  if (tree->FindBranch("is_crosspcrm")) tree->SetBranchAddress("is_crosspcrm", &is_crosspcrm);
  + // if (tree->FindBranch("inv_mass")) tree->SetBranchAddress("inv_mass", &inv_mass);
  + // if (tree->FindBranch("inv_masspdg")) tree->SetBranchAddress("inv_masspdg", &inv_masspdg);
  // heavy particle
  if (tree->FindBranch("heavy_mult")) tree->SetBranchAddress("heavy_mult", &heavy_mult);
  