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[PWGCF] Add eta gap scan for cascades flow #16014

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jaelpark merged 3 commits into from
Apr 29, 2026
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[PWGCF] Add eta gap scan for cascades flow #16014

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fuchuncui Apr 29, 2026
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105 changes: 69 additions & 36 deletions PWGCF/Flow/Tasks/flowGfwOmegaXi.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -118,6 +118,8 @@ struct FlowGfwOmegaXi {
O2_DEFINE_CONFIGURABLE(cfgv0_ArmPodocut, float, 0.2f, "Armenteros Podolski cut for K0")
O2_DEFINE_CONFIGURABLE(cfgv0_compmassrejLambda, float, 0.01f, "competing mass rejection of lambda")
O2_DEFINE_CONFIGURABLE(cfgv0_compmassrejK0s, float, 0.005f, "competing mass rejection of K0s")
O2_DEFINE_CONFIGURABLE(cfgv0_ctauK0s, float, 20, "Max ctau cut of K0s")
O2_DEFINE_CONFIGURABLE(cfgv0_ctauLambda, float, 30, "Max ctau cut of Lambda")
} v0BuilderOpts;

struct : ConfigurableGroup {
Expand Down Expand Up @@ -158,7 +160,8 @@ struct FlowGfwOmegaXi {
O2_DEFINE_CONFIGURABLE(cfgCutPtPIDbachMin, float, 0.15f, "Minimal pT for daughter PID")
O2_DEFINE_CONFIGURABLE(cfgCutPtPIDdauLaPrMin, float, 0.15f, "Minimal pT for daughter PID")
O2_DEFINE_CONFIGURABLE(cfgCutPtPIDdauLaPiMin, float, 0.15f, "Minimal pT for daughter PID")
O2_DEFINE_CONFIGURABLE(cfgCutDCAz, float, 2.0f, "Minimal pT for daughter PID")
O2_DEFINE_CONFIGURABLE(cfgCutDCAz, float, 2.0f, "Maximal DCAz for tracks")
O2_DEFINE_CONFIGURABLE(cfgCutDCAxy, float, 0.1f, "Maximal DCAxy for tracks")
// track quality selections for daughter track
O2_DEFINE_CONFIGURABLE(cfgITSNCls, int, 3, "check minimum number of ITS clusters")
O2_DEFINE_CONFIGURABLE(cfgChITSNCls, int, 5, "check minimum number of ITS clusters")
Expand Down Expand Up @@ -194,6 +197,7 @@ struct FlowGfwOmegaXi {
O2_DEFINE_CONFIGURABLE(cfgLocDenParaK0s, std::vector<double>, (std::vector<double>{-0.00043057, -3.2435, -0.000385085, -2.97687, -0.000350298, -2.81502, -0.000326159, -2.71091, -0.000299563, -2.65448, -0.000294284, -2.60865, -0.000277938, -2.589, -0.000277091, -2.56983, -0.000272783, -2.56825, -0.000252706, -2.58996, -0.000247834, -2.63158, -0.00024379, -2.76976, -0.000286468, -2.92484, -0.000310149, -3.27746}), "Local density efficiency function parameter for K0s, exp(Ax + B)")
O2_DEFINE_CONFIGURABLE(cfgLocDenParaLambda, std::vector<double>, (std::vector<double>{-0.000510948, -4.4846, -0.000460629, -4.14465, -0.000433729, -3.94173, -0.000412751, -3.81839, -0.000411211, -3.72502, -0.000401511, -3.68426, -0.000407461, -3.67005, -0.000379371, -3.71153, -0.000392828, -3.73214, -0.000403996, -3.80717, -0.000403376, -3.90917, -0.000354624, -4.34629, -0.000477606, -4.66307, -0.000541139, -4.61364}), "Local density efficiency function parameter for Lambda, exp(Ax + B)")
O2_DEFINE_CONFIGURABLE(cfgRunNumbers, std::vector<int>, (std::vector<int>{544095, 544098, 544116, 544121, 544122, 544123, 544124}), "Preconfigured run numbers")
O2_DEFINE_CONFIGURABLE(cfgEtagapEdge, std::vector<double>, (std::vector<double>{-0.8, -0.4, 0.4, 0.8}), "sub-event eta range A: ([0], [1]) and C: ([2], [3])")
// switch
O2_DEFINE_CONFIGURABLE(cfgDoAccEffCorr, bool, false, "do acc and eff corr")
O2_DEFINE_CONFIGURABLE(cfgDoLocDenCorr, bool, false, "do local density corr")
Expand Down Expand Up @@ -225,7 +229,7 @@ struct FlowGfwOmegaXi {
AxisSpec axisMultiplicity{{0, 5, 10, 20, 30, 40, 50, 60, 70, 80, 90}, "Centrality (%)"};

Filter collisionFilter = nabs(aod::collision::posZ) < cfgCutVertex;
Filter trackFilter = (nabs(aod::track::eta) < trkQualityOpts.cfgCutEta.value) && (aod::track::pt > trkQualityOpts.cfgCutPtPOIMin.value) && (aod::track::pt < trkQualityOpts.cfgCutPtPOIMax.value) && ((requireGlobalTrackInFilter()) || (aod::track::isGlobalTrackSDD == (uint8_t)true)) && (aod::track::tpcChi2NCl < cfgCutChi2prTPCcls) && (nabs(aod::track::dcaZ) < trkQualityOpts.cfgCutDCAz.value);
Filter trackFilter = (nabs(aod::track::eta) < trkQualityOpts.cfgCutEta.value) && (aod::track::pt > trkQualityOpts.cfgCutPtPOIMin.value) && (aod::track::pt < trkQualityOpts.cfgCutPtPOIMax.value) && ((requireGlobalTrackInFilter()) || (aod::track::isGlobalTrackSDD == (uint8_t)true)) && (aod::track::tpcChi2NCl < cfgCutChi2prTPCcls) && (nabs(aod::track::dcaZ) < trkQualityOpts.cfgCutDCAz.value) && (nabs(aod::track::dcaXY) < trkQualityOpts.cfgCutDCAxy.value);

using TracksPID = soa::Join<aod::pidTPCPi, aod::pidTPCKa, aod::pidTPCPr, aod::pidTOFPi, aod::pidTOFKa, aod::pidTOFPr>;
using AodTracks = soa::Filtered<soa::Join<aod::Tracks, aod::TrackSelection, o2::aod::TrackSelectionExtension, aod::TracksExtra, TracksPID, aod::TracksIU, aod::TracksDCA>>; // tracks filter
Expand Down Expand Up @@ -255,6 +259,7 @@ struct FlowGfwOmegaXi {
std::vector<float> cfgMultPVCutPara;
std::vector<int> cfgmassbins;
std::vector<int> runNumbers;
std::vector<double> EtagapEdge;
std::map<int, std::vector<std::shared_ptr<TH1>>> th1sList;
std::map<int, std::vector<std::shared_ptr<TH3>>> th3sList;
enum OutputTH1Names {
Expand Down Expand Up @@ -327,6 +332,7 @@ struct FlowGfwOmegaXi {
cfgNSigma = cfgNSigmapid;
cfgmassbins = cfgMassBins;
cfgMultPVCutPara = evtSeleOpts.cfgMultPVCut;
EtagapEdge = cfgEtagapEdge;

// Set the pt, mult and phi Axis;
o2::framework::AxisSpec axisPt = cfgaxisPt;
Expand Down Expand Up @@ -541,7 +547,7 @@ struct FlowGfwOmegaXi {
registry.add("K0sc22dpt", ";pt ; C_{2}{2} ", {HistType::kTProfile3D, {cfgaxisPtK0s, cfgaxisK0sMassforflow, axisMultiplicity}});
registry.add("Lambdac22dpt", ";pt ; C_{2}{2} ", {HistType::kTProfile3D, {cfgaxisPtLambda, cfgaxisLambdaMassforflow, axisMultiplicity}});
registry.add("K0sc24dpt", ";pt ; C_{2}{4} ", {HistType::kTProfile3D, {cfgaxisPtK0s, cfgaxisK0sMassforflow, axisMultiplicity}});
registry.add("Lambdac24dpt", ";pt ; C_{2}{4} ", {HistType::kTProfile3D, {cfgaxisPtK0s, cfgaxisLambdaMassforflow, axisMultiplicity}});
registry.add("Lambdac24dpt", ";pt ; C_{2}{4} ", {HistType::kTProfile3D, {cfgaxisPtLambda, cfgaxisLambdaMassforflow, axisMultiplicity}});
registry.add("K0sc22Fulldpt", ";pt ; C_{2}{2} ", {HistType::kTProfile3D, {cfgaxisPtK0s, cfgaxisK0sMassforflow, axisMultiplicity}});
registry.add("Lambdac22Fulldpt", ";pt ; C_{2}{2} ", {HistType::kTProfile3D, {cfgaxisPtLambda, cfgaxisLambdaMassforflow, axisMultiplicity}});
// v3
Expand Down Expand Up @@ -625,42 +631,46 @@ struct FlowGfwOmegaXi {
}

// Data
fGFW->AddRegion("reffull", -0.8, 0.8, 1, 1); // ("name", etamin, etamax, ptbinnum, bitmask)eta region -0.8 to 0.8
fGFW->AddRegion("refN10", -0.8, -0.4, 1, 1);
fGFW->AddRegion("refP10", 0.4, 0.8, 1, 1);
// POI
fGFW->AddRegion("poiN10dpt", -0.8, -0.4, nPtBins, 32);
fGFW->AddRegion("poiP10dpt", 0.4, 0.8, nPtBins, 32);
fGFW->AddRegion("poifulldpt", -0.8, 0.8, nPtBins, 32);
fGFW->AddRegion("poioldpt", -0.8, 0.8, nPtBins, 1);

int nXiptMassBins = nXiPtBins * cfgmassbins[2];
fGFW->AddRegion("poiXiPdpt", 0.4, 0.8, nXiptMassBins, 2);
fGFW->AddRegion("poiXiNdpt", -0.8, -0.4, nXiptMassBins, 2);
fGFW->AddRegion("poiXifulldpt", -0.8, 0.8, nXiptMassBins, 2);
int nOmegaptMassBins = nXiPtBins * cfgmassbins[3];
fGFW->AddRegion("poiOmegaPdpt", 0.4, 0.8, nOmegaptMassBins, 4);
fGFW->AddRegion("poiOmegaNdpt", -0.8, -0.4, nOmegaptMassBins, 4);
fGFW->AddRegion("poiOmegafulldpt", -0.8, 0.8, nOmegaptMassBins, 4);
fGFW->AddRegion("reffull", EtagapEdge[0], EtagapEdge[3], 1, 1); // ("name", etamin, etamax, ptbinnum, bitmask)eta region -0.8 to 0.8
int nK0sptMassBins = nK0sPtBins * cfgmassbins[0];
fGFW->AddRegion("poiK0sPdpt", 0.4, 0.8, nK0sptMassBins, 8);
fGFW->AddRegion("poiK0sNdpt", -0.8, -0.4, nK0sptMassBins, 8);
fGFW->AddRegion("poiK0sfulldpt", -0.8, 0.8, nK0sptMassBins, 8);
int nLambdaptMassBins = nLambdaPtBins * cfgmassbins[1];
fGFW->AddRegion("poiLambdaPdpt", 0.4, 0.8, nLambdaptMassBins, 16);
fGFW->AddRegion("poiLambdaNdpt", -0.8, -0.4, nLambdaptMassBins, 16);
fGFW->AddRegion("poiLambdafulldpt", -0.8, 0.8, nLambdaptMassBins, 16);
int nXiptMassBins = nXiPtBins * cfgmassbins[2];
int nOmegaptMassBins = nXiPtBins * cfgmassbins[3];

fGFW->AddRegion("refN10", EtagapEdge[0], EtagapEdge[1], 1, 1);
fGFW->AddRegion("refP10", EtagapEdge[2], EtagapEdge[3], 1, 1);

fGFW->AddRegion("poiN10dpt", EtagapEdge[0], EtagapEdge[1], nPtBins, 32);
fGFW->AddRegion("poiP10dpt", EtagapEdge[2], EtagapEdge[3], nPtBins, 32);
fGFW->AddRegion("poifulldpt", EtagapEdge[0], EtagapEdge[3], nPtBins, 32);
fGFW->AddRegion("poioldpt", EtagapEdge[0], EtagapEdge[3], nPtBins, 1);

fGFW->AddRegion("poiXiPdpt", EtagapEdge[2], EtagapEdge[3], nXiptMassBins, 2);
fGFW->AddRegion("poiXiNdpt", EtagapEdge[0], EtagapEdge[1], nXiptMassBins, 2);
fGFW->AddRegion("poiXifulldpt", EtagapEdge[0], EtagapEdge[3], nXiptMassBins, 2);

fGFW->AddRegion("poiOmegaPdpt", EtagapEdge[2], EtagapEdge[3], nOmegaptMassBins, 4);
fGFW->AddRegion("poiOmegaNdpt", EtagapEdge[0], EtagapEdge[1], nOmegaptMassBins, 4);
fGFW->AddRegion("poiOmegafulldpt", EtagapEdge[0], EtagapEdge[3], nOmegaptMassBins, 4);

fGFW->AddRegion("poiK0sPdpt", EtagapEdge[2], EtagapEdge[3], nK0sptMassBins, 8);
fGFW->AddRegion("poiK0sNdpt", EtagapEdge[0], EtagapEdge[1], nK0sptMassBins, 8);
fGFW->AddRegion("poiK0sfulldpt", EtagapEdge[0], EtagapEdge[3], nK0sptMassBins, 8);

fGFW->AddRegion("poiLambdaPdpt", EtagapEdge[2], EtagapEdge[3], nLambdaptMassBins, 16);
fGFW->AddRegion("poiLambdaNdpt", EtagapEdge[0], EtagapEdge[1], nLambdaptMassBins, 16);
fGFW->AddRegion("poiLambdafulldpt", EtagapEdge[0], EtagapEdge[3], nLambdaptMassBins, 16);
// MC
fGFW->AddRegion("refN10MC", -0.8, -0.4, 1, 64);
fGFW->AddRegion("refP10MC", 0.4, 0.8, 1, 64);
fGFW->AddRegion("poiXiPdptMC", 0.4, 0.8, nXiptMassBins, 128);
fGFW->AddRegion("poiXiNdptMC", -0.8, -0.4, nXiptMassBins, 128);
fGFW->AddRegion("poiOmegaPdptMC", 0.4, 0.8, nOmegaptMassBins, 256);
fGFW->AddRegion("poiOmegaNdptMC", -0.8, -0.4, nOmegaptMassBins, 256);
fGFW->AddRegion("poiK0sPdptMC", 0.4, 0.8, nK0sptMassBins, 512);
fGFW->AddRegion("poiK0sNdptMC", -0.8, -0.4, nK0sptMassBins, 512);
fGFW->AddRegion("poiLambdaPdptMC", 0.4, 0.8, nLambdaptMassBins, 1024);
fGFW->AddRegion("poiLambdaNdptMC", -0.8, -0.4, nLambdaptMassBins, 1024);
fGFW->AddRegion("refN10MC", EtagapEdge[0], EtagapEdge[1], 1, 64);
fGFW->AddRegion("refP10MC", EtagapEdge[2], EtagapEdge[3], 1, 64);
fGFW->AddRegion("poiXiPdptMC", EtagapEdge[2], EtagapEdge[3], nXiptMassBins, 128);
fGFW->AddRegion("poiXiNdptMC", EtagapEdge[0], EtagapEdge[1], nXiptMassBins, 128);
fGFW->AddRegion("poiOmegaPdptMC", EtagapEdge[2], EtagapEdge[3], nOmegaptMassBins, 256);
fGFW->AddRegion("poiOmegaNdptMC", EtagapEdge[0], EtagapEdge[1], nOmegaptMassBins, 256);
fGFW->AddRegion("poiK0sPdptMC", EtagapEdge[2], EtagapEdge[3], nK0sptMassBins, 512);
fGFW->AddRegion("poiK0sNdptMC", EtagapEdge[0], EtagapEdge[1], nK0sptMassBins, 512);
fGFW->AddRegion("poiLambdaPdptMC", EtagapEdge[2], EtagapEdge[3], nLambdaptMassBins, 1024);
fGFW->AddRegion("poiLambdaNdptMC", EtagapEdge[0], EtagapEdge[1], nLambdaptMassBins, 1024);
// pushback
// Data
// v2
Expand Down Expand Up @@ -1156,6 +1166,10 @@ struct FlowGfwOmegaXi {
continue;
if (v0negdau.pt() < trkQualityOpts.cfgCutPtDauMin.value || v0negdau.pt() > trkQualityOpts.cfgCutPtDauMax.value)
continue;
if (v0posdau.eta() < trkQualityOpts.cfgCutEta.value || v0posdau.eta() > trkQualityOpts.cfgCutEta.value)
continue;
if (v0negdau.eta() < trkQualityOpts.cfgCutEta.value || v0negdau.eta() > trkQualityOpts.cfgCutEta.value)
continue;

// fill QA
if (cfgOutputQA) {
Expand Down Expand Up @@ -1238,6 +1252,19 @@ struct FlowGfwOmegaXi {
if (!v0negdau.hasTPC() || !v0negdau.hasITS())
continue;
}
float ctau = 0;
if (isK0s) {
ctau = v0.distovertotmom(collision.posX(), collision.posY(), collision.posZ()) * o2::constants::physics::MassK0Short;
if (ctau < v0BuilderOpts.cfgv0_ctauK0s.value)
isK0s = false;
}
if (isLambda || isALambda) {
ctau = v0.distovertotmom(collision.posX(), collision.posY(), collision.posZ()) * o2::constants::physics::MassLambda0;
if (ctau < v0BuilderOpts.cfgv0_ctauLambda.value) {
isLambda = false;
isALambda = false;
}
}
// // topological cut
if (v0.v0radius() < v0BuilderOpts.cfgv0_radius.value)
continue;
Expand Down Expand Up @@ -1367,6 +1394,12 @@ struct FlowGfwOmegaXi {
continue;
if (negdau.pt() < trkQualityOpts.cfgCutPtDauMin.value || negdau.pt() > trkQualityOpts.cfgCutPtDauMax.value)
continue;
if (std::fabs(bachelor.eta()) < trkQualityOpts.cfgCutEta.value)
continue;
if (std::fabs(posdau.eta()) < trkQualityOpts.cfgCutEta.value)
continue;
if (std::fabs(negdau.eta()) < trkQualityOpts.cfgCutEta.value)
continue;

// Omega and antiOmega
if (casc.pt() > trkQualityOpts.cfgCutPtOmegaMin.value && casc.pt() < trkQualityOpts.cfgCutPtOmegaMax.value) {
Expand Down
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