[PWGHF] Change default value of minimum centrality cut in HF event selection (#12789)

Author: fcatalan92

PWGHF/Core/CentralityEstimation.h

@@ -107,7 +107,7 @@ float getCentralityColl(const TCollision& collision)
 template <typename TCollision>
 float getCentralityColl(const TCollision&)
 {
-  return 105.0f;
+  return -1.f;
 }
 
 /// Get the centrality
@@ -146,7 +146,7 @@ float getCentralityColl(const TCollision& collision, const int centEstimator)
       LOG(fatal) << "Centrality estimator not valid. See CentralityEstimator for valid values.";
       break;
   }
-  return -999.f;
+  return -1.f;
 }
 
 /// \brief Function to get MC collision centrality
@@ -155,11 +155,10 @@ float getCentralityColl(const TCollision& collision, const int centEstimator)
 template <typename TCollisions>
 float getCentralityGenColl(TCollisions const& collSlice)
 {
-  using TMult = uint16_t; // type of numContrib
+  uint16_t multiplicity{}; // type of numContrib
   float centrality{-1.f};
-  TMult multiplicity{};
   for (const auto& collision : collSlice) {
-    const TMult collMult = collision.numContrib();
+    const uint16_t collMult = collision.numContrib();
     if (collMult > multiplicity) {
       centrality = getCentralityColl(collision);
       multiplicity = collMult;
@@ -175,11 +174,10 @@ float getCentralityGenColl(TCollisions const& collSlice)
 template <typename TCollisions>
 float getCentralityGenColl(TCollisions const& collSlice, const int centEstimator)
 {
-  using TMult = uint16_t; // type of numContrib
+  uint16_t multiplicity{}; // type of numContrib
   float centrality{-1.f};
-  TMult multiplicity{};
   for (const auto& collision : collSlice) {
-    const TMult collMult = collision.numContrib();
+    const uint16_t collMult = collision.numContrib();
     if (collMult > multiplicity) {
       centrality = getCentralityColl(collision, centEstimator);
       multiplicity = collMult;

PWGHF/Utils/utilsEvSelHf.h

@@ -150,7 +150,7 @@ void setEventRejectionLabels(Histo& hRejection, std::string const& softwareTrigg
 struct HfEventSelection : o2::framework::ConfigurableGroup {
   std::string prefix = "hfEvSel"; // JSON group name
   // event selection parameters (in chronological order of application)
-  o2::framework::Configurable<float> centralityMin{"centralityMin", 0.f, "Minimum centrality"};
+  o2::framework::Configurable<float> centralityMin{"centralityMin", -10.f, "Minimum centrality (0 rejects gen. collisions with no reco. collision)"};
   o2::framework::Configurable<float> centralityMax{"centralityMax", 100.f, "Maximum centrality"};
   o2::framework::Configurable<bool> useSel8Trigger{"useSel8Trigger", true, "Apply the sel8 event selection"};
   o2::framework::Configurable<int> triggerClass{"triggerClass", -1, "Trigger class different from sel8 (e.g. kINT7 for Run2) used only if useSel8Trigger is false"};
@@ -432,7 +432,7 @@ struct HfEventSelectionMc {
   bool useItsRofBorderCut{false};             // Apply the ITS RO frame border cut
   float zPvPosMin{-1000.f};                   // Minimum PV posZ (cm)
   float zPvPosMax{1000.f};                    // Maximum PV posZ (cm)
-  float centralityMin{0.f};                   // Minimum centrality
+  float centralityMin{-10.f};                 // Minimum centrality
   float centralityMax{100.f};                 // Maximum centrality
   bool requireGoodRct{false};                 // Apply RCT selection
   std::string rctLabel{""};                   // RCT selection flag