[PWGLF] Updates in sigma0 tasks (#14078)

Co-authored-by: ALICE Action Bot <alibuild@cern.ch>

Author: gianniliveraro

PWGLF/DataModel/LFSigmaTables.h

@@ -35,6 +35,13 @@ using std::array;
 namespace o2::aod
 {
 
+// Indexing
+namespace sigma0Core
+{
+DECLARE_SOA_INDEX_COLUMN_FULL(PhotonV0, photonV0, int, V0Cores, "_PhotonV0"); //!
+DECLARE_SOA_INDEX_COLUMN_FULL(LambdaV0, lambdaV0, int, V0Cores, "_LambdaV0"); //!
+} // namespace sigma0Core
+
 // for real data
 namespace sigma0Core
 {
@@ -429,6 +436,7 @@ DECLARE_SOA_DYNAMIC_COLUMN(LambdaMCPhi, lambdaMCPhi, //! Phi in the range [0, 2p
 } // namespace sigma0MCCore
 
 DECLARE_SOA_TABLE(Sigma0MCCores, "AOD", "SIGMA0MCCORES",
+
                   // Basic properties
                   sigma0MCCore::MCradius, sigma0MCCore::PDGCode, sigma0MCCore::PDGCodeMother, sigma0MCCore::MCprocess, sigma0MCCore::IsProducedByGenerator,
 
@@ -465,6 +473,10 @@ DECLARE_SOA_TABLE(Sigma0MCCores, "AOD", "SIGMA0MCCORES",
                   sigma0MCCore::LambdaMCY<sigma0MCCore::LambdaMCPx, sigma0MCCore::LambdaMCPy, sigma0MCCore::LambdaMCPz>,
                   sigma0MCCore::LambdaMCPhi<sigma0MCCore::LambdaMCPx, sigma0MCCore::LambdaMCPy>);
 
+namespace sigma0MCCore
+{
+DECLARE_SOA_INDEX_COLUMN(McParticle, mcParticle); //! MC particle for Sigma0
+}
 namespace sigma0Gen
 {
 DECLARE_SOA_COLUMN(IsSigma0, isSigma0, bool); // true: sigma0, false: antisigma0
@@ -481,6 +493,12 @@ DECLARE_SOA_TABLE(Sigma0Gens, "AOD", "SIGMA0GENS",
 DECLARE_SOA_TABLE(SigmaCollRef, "AOD", "SIGMACOLLREF", //! optional table to refer back to a collision
                   o2::soa::Index<>, v0data::StraCollisionId);
 
+DECLARE_SOA_TABLE(SigmaIndices, "AOD", "SIGMAINDEX", //! index table when using AO2Ds
+                  o2::soa::Index<>, sigma0Core::PhotonV0Id, sigma0Core::LambdaV0Id, o2::soa::Marker<1>);
+
+DECLARE_SOA_TABLE(SigmaMCLabels, "AOD", "SIGMAMCLABEL", //! optional table to refer to mcparticles
+                  o2::soa::Index<>, sigma0MCCore::McParticleId);
+
 DECLARE_SOA_TABLE(SigmaGenCollRef, "AOD", "SIGMAGENCOLLREF", //! optional table to refer back to a collision
                   o2::soa::Index<>, v0data::StraMCCollisionId);