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[PWGHF] Fix KFParticle reconstruction in Xic0/Omegac0 candidate creator #18047

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Merged
fcatalan92 merged 1 commit into from
Sep 26, 2026
+5 −5
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[PWGHF] Fix KFParticle reconstruction in Xic0/Omegac0 candidate creator #18047

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10 changes: 5 additions & 5 deletions PWGHF/TableProducer/candidateCreatorXic0Omegac0.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -880,7 +880,7 @@ struct HfCandidateCreatorXic0Omegac0 {
KFParticle kfV0MassConstrained = kfV0;
kfV0MassConstrained.SetNonlinearMassConstraint(o2::constants::physics::MassLambda); // set mass constrain to Lambda
if (kfUseV0MassConstraint) {
KFParticle const kfV0 = kfV0MassConstrained;
kfV0 = kfV0MassConstrained;
}
kfV0.TransportToDecayVertex();

Expand Down Expand Up @@ -921,7 +921,7 @@ struct HfCandidateCreatorXic0Omegac0 {
kfOmegaMassConstrained.SetNonlinearMassConstraint(o2::constants::physics::MassOmegaMinus); // set mass constrain to OmegaMinus
if (kfUseCascadeMassConstraint) {
// set mass constraint if requested
KFParticle const kfOmega = kfOmegaMassConstrained;
kfOmega = kfOmegaMassConstrained;
}
registry.fill(HIST("hInvMassOmegaMinus"), massCasc);
kfOmega.TransportToDecayVertex();
Expand All @@ -931,7 +931,7 @@ struct HfCandidateCreatorXic0Omegac0 {
//*>~<* step 3 : reconstruc Omegac0 with KF
// Create KF charm bach Pion from track
KFPTrack const kfTrackBachPion = createKFPTrackFromTrack(trackCharmBachelor);
KFParticle const kfBachPion(kfTrackBachPion, kPiPlus);
KFParticle const kfBachPion(kfTrackBachPion, bachCharge < 0 ? kPiPlus : kPiMinus);
const KFParticle* omegaC0Daugthers[2] = {&kfBachPion, &kfOmega};

// construct OmegaC0
Expand Down Expand Up @@ -1414,7 +1414,7 @@ struct HfCandidateCreatorXic0Omegac0 {
kfXiMassConstrained.SetNonlinearMassConstraint(o2::constants::physics::MassXiMinus); // set mass constrain to XiMinus
if (kfUseCascadeMassConstraint) {
// set mass constraint if requested
KFParticle const kfXi = kfXiMassConstrained;
kfXi = kfXiMassConstrained;
}
registry.fill(HIST("hInvMassXiMinus"), massCasc);
kfXi.TransportToDecayVertex();
Expand Down Expand Up @@ -1848,7 +1848,7 @@ struct HfCandidateCreatorXic0Omegac0 {
}
registry.fill(HIST("hInvMassXiMinus_rej"), massCascrej); // rej: Add competing rejection to minimize misidentified Xi impact. Reject if kfBachPionRej is Pion and the constructed cascade has Xi's invariant mass.
KFParticle kfOmegaMassConstrained = kfOmega;
kfOmegaMassConstrained.SetNonlinearMassConstraint(o2::constants::physics::MassOmegaMinus); // set mass constrain to XiMinus
kfOmegaMassConstrained.SetNonlinearMassConstraint(o2::constants::physics::MassOmegaMinus); // set mass constrain to OmegaMinus
if (kfUseCascadeMassConstraint) {
// set mass constraint if requested
kfOmega = kfOmegaMassConstrained;
Expand Down
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