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Fix for Loopers identified as primaries #15603

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Merged
sawenzel merged 1 commit into from
Jul 16, 2026
+8 −9
Merged

Fix for Loopers identified as primaries #15603

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17 changes: 8 additions & 9 deletions Generators/src/TPCLoopers.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -286,15 +286,14 @@ std::vector<TParticle> GenTPCLoopers::importParticles()
p_etot = TMath::Sqrt(px_p * px_p + py_p * py_p + pz_p * pz_p + mass_p * mass_p);
// Push the electron
TParticle electron(11, 1, -1, -1, -1, -1, px_e, py_e, pz_e, e_etot, vx, vy, vz, time / 1e9);
electron.SetStatusCode(o2::mcgenstatus::MCGenStatusEncoding(electron.GetStatusCode(), 0).fullEncoding);
electron.SetBit(ParticleStatus::kToBeDone, //
o2::mcgenstatus::getHepMCStatusCode(electron.GetStatusCode()) == 1);
// Setting HepMC status code != 1 to avoid detecting the loopers as physical primaries
electron.SetStatusCode(o2::mcgenstatus::MCGenStatusEncoding(2, 0).fullEncoding);
electron.SetBit(ParticleStatus::kToBeDone, true);
particles.push_back(electron);
// Push the positron
TParticle positron(-11, 1, -1, -1, -1, -1, px_p, py_p, pz_p, p_etot, vx, vy, vz, time / 1e9);
positron.SetStatusCode(o2::mcgenstatus::MCGenStatusEncoding(positron.GetStatusCode(), 0).fullEncoding);
positron.SetBit(ParticleStatus::kToBeDone, //
o2::mcgenstatus::getHepMCStatusCode(positron.GetStatusCode()) == 1);
positron.SetStatusCode(o2::mcgenstatus::MCGenStatusEncoding(2, 0).fullEncoding);
positron.SetBit(ParticleStatus::kToBeDone, true);
particles.push_back(positron);
}
// Get compton electrons from the event
Expand All @@ -312,9 +311,9 @@ std::vector<TParticle> GenTPCLoopers::importParticles()
etot = TMath::Sqrt(px * px + py * py + pz * pz + mass_e * mass_e);
// Push the electron
TParticle electron(11, 1, -1, -1, -1, -1, px, py, pz, etot, vx, vy, vz, time / 1e9);
electron.SetStatusCode(o2::mcgenstatus::MCGenStatusEncoding(electron.GetStatusCode(), 0).fullEncoding);
electron.SetBit(ParticleStatus::kToBeDone, //
o2::mcgenstatus::getHepMCStatusCode(electron.GetStatusCode()) == 1);
// Setting HepMC status code != 1 to avoid detecting the loopers as physical primaries
electron.SetStatusCode(o2::mcgenstatus::MCGenStatusEncoding(2, 0).fullEncoding);
electron.SetBit(ParticleStatus::kToBeDone, true);
particles.push_back(electron);
}

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