[PWGCF] adding configurable for occupancy selection range (AliceO2Group#8657)

Co-authored-by: junleekim <[email protected]>

Author: jikim1290

PWGCF/TableProducer/filterCorrelations.cxx

@@ -60,6 +60,8 @@ struct FilterCF {
   O2_DEFINE_CONFIGURABLE(cfgCutMCEta, float, 0.8f, "Eta range for particles")
   O2_DEFINE_CONFIGURABLE(cfgVerbosity, int, 1, "Verbosity level (0 = major, 1 = per collision)")
   O2_DEFINE_CONFIGURABLE(cfgTrigger, int, 7, "Trigger choice: (0 = none, 7 = sel7, 8 = sel8, 9 = sel8 + kNoSameBunchPileup + kIsGoodZvtxFT0vsPV, 10 = sel8 before April, 2024, 11 = sel8 for MC, 12 = sel8 with low occupancy cut)")
+  O2_DEFINE_CONFIGURABLE(cfgMinOcc, int, 0, "minimum occupancy selection")
+  O2_DEFINE_CONFIGURABLE(cfgMaxOcc, int, 3000, "maximum occupancy selection")
   O2_DEFINE_CONFIGURABLE(cfgCollisionFlags, uint16_t, aod::collision::CollisionFlagsRun2::Run2VertexerTracks, "Request collision flags if non-zero (0 = off, 1 = Run2VertexerTracks)")
   O2_DEFINE_CONFIGURABLE(cfgTransientTables, bool, false, "Output transient tables for collision and track IDs")
   O2_DEFINE_CONFIGURABLE(cfgTrackSelection, int, 0, "Type of track selection (0 = Run 2/3 without systematics | 1 = Run 3 with systematics)")
@@ -111,7 +113,7 @@ struct FilterCF {
       return isMultSelected && collision.selection_bit(aod::evsel::kIsTriggerTVX) && collision.selection_bit(aod::evsel::kNoTimeFrameBorder);
     } else if (cfgTrigger == 12) { // relevant only for Pb-Pb with occupancy cuts and rejection of the collisions which have other events nearby
       int occupancy = collision.trackOccupancyInTimeRange();
-      if (occupancy >= 0 && occupancy < 500)
+      if (occupancy >= cfgMinOcc && occupancy < cfgMaxOcc)
         return isMultSelected && collision.sel8() && collision.selection_bit(aod::evsel::kNoSameBunchPileup) && collision.selection_bit(aod::evsel::kIsGoodZvtxFT0vsPV) && collision.selection_bit(aod::evsel::kNoCollInTimeRangeStandard);
       else
         return false;