PWGHF: fix bug in rejection of particles from bkg (embedding) (#6993)

* Properly rebase

* Fix typo

Author: fgrosa

PWGHF/TableProducer/candidateCreator2Prong.cxx

@@ -710,15 +710,20 @@ struct HfCandidateCreator2ProngExpressions {
 
       // Check whether the particle is from background events. If so, reject it.
       if (rejectBackground) {
+        bool fromBkg{false};
         for (const auto& daughter : arrayDaughters) {
           if (daughter.has_mcParticle()) {
             auto mcParticle = daughter.mcParticle();
             if (mcParticle.fromBackgroundEvent()) {
-              rowMcMatchRec(flag, origin, -1.f, 0);
-              continue;
+              fromBkg = true;
+              break;
             }
           }
         }
+        if (fromBkg) {
+          rowMcMatchRec(flag, origin, -1.f, 0);
+          continue;
+        }
       }
       std::vector<int> idxBhadMothers{};
 

PWGHF/TableProducer/candidateCreator3Prong.cxx

@@ -545,15 +545,20 @@ struct HfCandidateCreator3ProngExpressions {
 
       // Check whether the particle is from background events. If so, reject it.
       if (rejectBackground) {
+        bool fromBkg{false};
         for (const auto& daughter : arrayDaughters) {
           if (daughter.has_mcParticle()) {
             auto mcParticle = daughter.mcParticle();
             if (mcParticle.fromBackgroundEvent()) {
-              rowMcMatchRec(flag, origin, swapping, channel, -1.f, 0);
-              continue;
+              fromBkg = true;
+              break;
             }
           }
         }
+        if (fromBkg) {
+          rowMcMatchRec(flag, origin, swapping, channel, -1.f, 0);
+          continue;
+        }
       }
 
       // D± → π± K∓ π±

PWGHF/TableProducer/candidateCreatorCascade.cxx

@@ -492,16 +492,20 @@ struct HfCandidateCreatorCascadeMc {
       auto arrayDaughtersLc = std::array{bach, trackV0DaughPos, trackV0DaughNeg};
       // Check whether the particle is from background events. If so, reject it.
       if (rejectBackground) {
-        auto arrayDaughers = std::array{bach, trackV0DaughPos, trackV0DaughNeg};
-        for (const auto& daughter : arrayDaughers) {
+        bool fromBkg{false};
+        for (const auto& daughter : arrayDaughtersLc) {
           if (daughter.has_mcParticle()) {
             auto mcParticle = daughter.mcParticle();
             if (mcParticle.fromBackgroundEvent()) {
-              rowMcMatchRec(sign, origin, -1.f, 0);
-              continue;
+              fromBkg = true;
+              break;
             }
           }
         }
+        if (fromBkg) {
+          rowMcMatchRec(sign, origin, -1.f, 0);
+          continue;
+        }
       }
 
       RecoDecay::getMatchedMCRec(mcParticles, arrayDaughtersV0, kK0Short, std::array{+kPiPlus, -kPiPlus}, false, &sign, 1);

PWGHF/TableProducer/candidateCreatorDstar.cxx

@@ -569,15 +569,20 @@ struct HfCandidateCreatorDstarExpressions {
 
       // Check whether the particle is from background events. If so, reject it.
       if (rejectBackground) {
+        bool fromBkg{false};
         for (const auto& daughter : arrayDaughtersDstar) {
           if (daughter.has_mcParticle()) {
             auto mcParticle = daughter.mcParticle();
             if (mcParticle.fromBackgroundEvent()) {
-              rowsMcMatchRecDstar(flagDstar, originDstar, -1.f, 0);
-              continue;
+              fromBkg = true;
+              break;
             }
           }
         }
+        if (fromBkg) {
+          rowsMcMatchRecDstar(flagDstar, originDstar, -1.f, 0);
+          continue;
+        }
       }
 
       // D*± → D0(bar) π±

PWGHF/TableProducer/candidateCreatorXic0Omegac0.cxx

@@ -760,15 +760,20 @@ struct HfCandidateCreatorXic0Omegac0Mc {
 
       // Check whether the particle is from background events. If so, reject it.
       if (rejectBackground) {
+        bool fromBkg{false};
         for (const auto& daughter : arrayDaughters) {
           if (daughter.has_mcParticle()) {
             auto mcParticle = daughter.mcParticle();
             if (mcParticle.fromBackgroundEvent()) {
-              rowMCMatchRecXicToXiPi(flag, debug, origin, collisionMatched, -1.f, 0);
-              continue;
+              fromBkg = true;
+              break;
             }
           }
         }
+        if (fromBkg) {
+          rowMCMatchRecXicToXiPi(flag, debug, origin, collisionMatched, -1.f, 0);
+          continue;
+        }
       }
 
       // Xic0 -> xi pi matching