diff --git a/PWGCF/FemtoUniverse/Tasks/femtoUniversePairTaskTrackPhi.cxx b/PWGCF/FemtoUniverse/Tasks/femtoUniversePairTaskTrackPhi.cxx
index 8b5948e5472..7aa4e4bc2c4 100644
--- a/PWGCF/FemtoUniverse/Tasks/femtoUniversePairTaskTrackPhi.cxx
+++ b/PWGCF/FemtoUniverse/Tasks/femtoUniversePairTaskTrackPhi.cxx
@@ -138,12 +138,12 @@ struct FemtoUniversePairTaskTrackPhi {
   Configurable<bool> confTrackUseRun3PIDforKaons{"confTrackUseRun3PIDforKaons", true, "Use Run3 PID for kaons from Veronika Barbasova's AN (https://alice-notes.web.cern.ch/node/1758). If this is on the other PID methods are ignored for kaons."};
 
   /// Partitions for the track (particle 1)
-  Partition<FilteredFemtoFullParticles> partsTrack = (aod::femtouniverseparticle::partType == uint8_t(aod::femtouniverseparticle::ParticleType::kTrack)) &&
+  Partition<FilteredFemtoFullParticles> partsTrack = (aod::femtouniverseparticle::partType == static_cast<uint8_t>(aod::femtouniverseparticle::ParticleType::kTrack)) &&
                                                      (aod::femtouniverseparticle::sign == confTrackSign) &&
                                                      (aod::femtouniverseparticle::pt > confTrackPtLow) &&
                                                      (aod::femtouniverseparticle::pt < confTrackPtHigh);
 
-  Partition<FemtoRecoParticles> partsTrackMCReco = (aod::femtouniverseparticle::partType == uint8_t(aod::femtouniverseparticle::ParticleType::kTrack)) &&
+  Partition<FemtoRecoParticles> partsTrackMCReco = (aod::femtouniverseparticle::partType == static_cast<uint8_t>(aod::femtouniverseparticle::ParticleType::kTrack)) &&
                                                    (aod::femtouniverseparticle::sign == confTrackSign) &&
                                                    (aod::femtouniverseparticle::pt > confTrackPtLow) &&
                                                    (aod::femtouniverseparticle::pt < confTrackPtHigh);
@@ -154,27 +154,30 @@ struct FemtoUniversePairTaskTrackPhi {
   Configurable<float> confInvMassLowLimitPhi{"confInvMassLowLimitPhi", 1.011, "Lower limit of the Phi invariant mass"}; // change that to do invariant mass cut
   Configurable<float> confInvMassUpLimitPhi{"confInvMassUpLimitPhi", 1.027, "Upper limit of the Phi invariant mass"};
   Configurable<bool> confFillMinvBackground{"confFillMinvBackground", false, "Fill background histograms for Phi invariant mass."};
+  Configurable<bool> confFillMinvBackgroundKpKm{"confFillMinvBackgroundKpKm", false, "Fill background histograms for K+K- invariant mass."};
+  Configurable<bool> confFillMinvBackgroundKpKp{"confFillMinvBackgroundKpKp", false, "Fill background histograms for K+K+ invariant mass."};
+  Configurable<bool> confFillMinvBackgroundKmKm{"confFillMinvBackgroundKmKm", false, "Fill background histograms for K-K- invariant mass."};
 
   /// Partitions for the Phi meson (particle 2)
-  Partition<FilteredFemtoFullParticles> partsPhi = (aod::femtouniverseparticle::partType == uint8_t(aod::femtouniverseparticle::ParticleType::kPhi)) &&
+  Partition<FilteredFemtoFullParticles> partsPhi = (aod::femtouniverseparticle::partType == static_cast<uint8_t>(aod::femtouniverseparticle::ParticleType::kPhi)) &&
                                                    (aod::femtouniverseparticle::pt > confPhiPtLow) &&
                                                    (aod::femtouniverseparticle::pt < confPhiPtHigh) &&
                                                    (aod::femtouniverseparticle::tempFitVar > confInvMassLowLimitPhi) &&
                                                    (aod::femtouniverseparticle::tempFitVar < confInvMassUpLimitPhi);
 
-  Partition<FemtoRecoParticles> partsPhiMCReco = (aod::femtouniverseparticle::partType == uint8_t(aod::femtouniverseparticle::ParticleType::kPhi)) &&
+  Partition<FemtoRecoParticles> partsPhiMCReco = (aod::femtouniverseparticle::partType == static_cast<uint8_t>(aod::femtouniverseparticle::ParticleType::kPhi)) &&
                                                  (aod::femtouniverseparticle::pt > confPhiPtLow) &&
                                                  (aod::femtouniverseparticle::pt < confPhiPtHigh) &&
                                                  (aod::femtouniverseparticle::tempFitVar > confInvMassLowLimitPhi) &&
                                                  (aod::femtouniverseparticle::tempFitVar < confInvMassUpLimitPhi);
 
   /// Partitions  for Phi daughters kPhiChild
-  Partition<FilteredFemtoFullParticles> partsPhiDaugh = (aod::femtouniverseparticle::partType == uint8_t(aod::femtouniverseparticle::ParticleType::kPhiChild));
-  Partition<soa::Join<FilteredFemtoFullParticles, aod::FDMCLabels>> partsPhiDaughMC = (aod::femtouniverseparticle::partType == uint8_t(aod::femtouniverseparticle::ParticleType::kPhiChild));
+  Partition<FilteredFemtoFullParticles> partsPhiDaugh = (aod::femtouniverseparticle::partType == static_cast<uint8_t>(aod::femtouniverseparticle::ParticleType::kPhiChild));
+  Partition<soa::Join<FilteredFemtoFullParticles, aod::FDMCLabels>> partsPhiDaughMC = (aod::femtouniverseparticle::partType == static_cast<uint8_t>(aod::femtouniverseparticle::ParticleType::kPhiChild));
 
   // Partition for K+K- minv
-  Partition<FilteredFemtoFullParticles> partsKaons = (aod::femtouniverseparticle::partType == uint8_t(aod::femtouniverseparticle::ParticleType::kTrack));
-  Partition<soa::Join<FilteredFemtoFullParticles, aod::FDMCLabels>> partsKaonsMC = (aod::femtouniverseparticle::partType == uint8_t(aod::femtouniverseparticle::ParticleType::kTrack));
+  Partition<FilteredFemtoFullParticles> partsKaons = (aod::femtouniverseparticle::partType == static_cast<uint8_t>(aod::femtouniverseparticle::ParticleType::kTrack));
+  Partition<soa::Join<FilteredFemtoFullParticles, aod::FDMCLabels>> partsKaonsMC = (aod::femtouniverseparticle::partType == static_cast<uint8_t>(aod::femtouniverseparticle::ParticleType::kTrack));
 
   /// Histogramming for particle 1
   FemtoUniverseParticleHisto<aod::femtouniverseparticle::ParticleType::kTrack, 1> trackHistoPartTrack;
@@ -562,14 +565,14 @@ struct FemtoUniversePairTaskTrackPhi {
       float mMassTwo = o2::constants::physics::MassKMinus;
 
       for (auto const& [kaon1, kaon2] : combinations(CombinationsStrictlyUpperIndexPolicy(partsKaons, partsKaons))) {
-        if ((kaon1.mAntiLambda() == 1) && (kaon2.mAntiLambda() == 1)) {
+        if ((confFillMinvBackgroundKpKp) && (kaon1.mAntiLambda() == 1) && (kaon2.mAntiLambda() == 1)) {
           part1Vec.SetPtEtaPhiM(kaon1.pt(), kaon1.eta(), kaon1.phi(), mMassOne);
           part2Vec.SetPtEtaPhiM(kaon2.pt(), kaon2.eta(), kaon2.phi(), mMassOne);
           TLorentzVector sumVec(part1Vec);
           sumVec += part2Vec;
           registryPhiMinvBackground.fill(HIST("InvariantMassKpKp"), sumVec.M());
         }
-        if ((kaon1.mAntiLambda() == -1) && (kaon2.mAntiLambda() == -1)) {
+        if ((confFillMinvBackgroundKmKm) && (kaon1.mAntiLambda() == -1) && (kaon2.mAntiLambda() == -1)) {
           part1Vec.SetPtEtaPhiM(kaon1.pt(), kaon1.eta(), kaon1.phi(), mMassTwo);
           part2Vec.SetPtEtaPhiM(kaon2.pt(), kaon2.eta(), kaon2.phi(), mMassTwo);
 
@@ -577,7 +580,7 @@ struct FemtoUniversePairTaskTrackPhi {
           sumVec += part2Vec;
           registryPhiMinvBackground.fill(HIST("InvariantMassKmKm"), sumVec.M());
         }
-        if ((kaon1.mAntiLambda() == 1) && (kaon2.mAntiLambda() == -1)) {
+        if ((confFillMinvBackgroundKpKm) && (kaon1.mAntiLambda() == 1) && (kaon2.mAntiLambda() == -1)) {
           part1Vec.SetPtEtaPhiM(kaon1.pt(), kaon1.eta(), kaon1.phi(), mMassOne);
           part2Vec.SetPtEtaPhiM(kaon2.pt(), kaon2.eta(), kaon2.phi(), mMassTwo);
 
@@ -681,7 +684,7 @@ struct FemtoUniversePairTaskTrackPhi {
   void processMCTruth(aod::FDParticles const& parts)
   {
     for (auto const& part : parts) {
-      if (part.partType() != uint8_t(aod::femtouniverseparticle::ParticleType::kMCTruthTrack)) {
+      if (part.partType() != static_cast<uint8_t>(aod::femtouniverseparticle::ParticleType::kMCTruthTrack)) {
         continue;
       }