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vkucera merged 1 commit into from
Sep 20, 2021
Merged

PWGHF: Add primary-vertex selection in skimming #94

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124 changes: 104 additions & 20 deletions PWGHF/TableProducer/HFTrackIndexSkimsCreator.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -44,6 +44,17 @@ enum CandidateType {
NCandidateTypes
};

// event rejection types
enum EventRejection {
Trigger = 0,
PositionX,
PositionY,
PositionZ,
NContrib,
Chi2,
NEventRejection
};

static const double massPi = RecoDecay::getMassPDG(kPiPlus);
static const double massK = RecoDecay::getMassPDG(kKPlus);
static const double massProton = RecoDecay::getMassPDG(kProton);
Expand All @@ -52,8 +63,8 @@ static const double massMuon = RecoDecay::getMassPDG(kMuonPlus);

void customize(std::vector<o2::framework::ConfigParamSpec>& workflowOptions)
{
ConfigParamSpec optionDoMC{"do-LcK0Sp", VariantType::Bool, false, {"Skim also Lc --> K0S+p"}};
ConfigParamSpec optionEvSel{"doEvSel", VariantType::Bool, false, {"Apply event selection"}};
ConfigParamSpec optionDoMC{"doCascades", VariantType::Bool, false, {"Skim also Λc -> K0S p"}};
ConfigParamSpec optionEvSel{"doTrigSel", VariantType::Bool, false, {"Apply trigger selection"}};
workflowOptions.push_back(optionDoMC);
workflowOptions.push_back(optionEvSel);
}
Expand All @@ -80,37 +91,102 @@ struct HfTagSelCollisions {
Produces<aod::HFSelCollision> rowSelectedCollision;

Configurable<bool> fillHistograms{"fillHistograms", true, "fill histograms"};
Configurable<double> xVertexMin{"xVertexMin", -100., "min. x of primary vertex [cm]"};
Configurable<double> xVertexMax{"xVertexMax", 100., "max. x of primary vertex [cm]"};
Configurable<double> yVertexMin{"yVertexMin", -100., "min. y of primary vertex [cm]"};
Configurable<double> yVertexMax{"yVertexMax", 100., "max. y of primary vertex [cm]"};
Configurable<double> zVertexMin{"zVertexMin", -100., "min. z of primary vertex [cm]"};
Configurable<double> zVertexMax{"zVertexMax", 100., "max. z of primary vertex [cm]"};
Configurable<int> nContribMin{"nContribMin", 0, "min. number of contributors to primary-vertex reconstruction"};
Configurable<double> chi2Max{"chi2Max", 0., "max. chi^2 of primary-vertex reconstruction"};
Configurable<std::string> triggerClassName{"triggerClassName", "kINT7", "trigger class"};
int triggerClass = std::distance(aliasLabels, std::find(aliasLabels, aliasLabels + kNaliases, triggerClassName.value.data()));

HistogramRegistry registry{
"registry",
{{"hEvents", "Events;;entries", {HistType::kTH1F, {{3, 0.5, 3.5}}}}}};
HistogramRegistry registry{"registry", {}};

void init(InitContext const&)
{
std::string labels[3] = {"processed collisions", "selected collisions", "rej. trigger class"};
for (int iBin = 0; iBin < 3; iBin++) {
const int nBinsEvents = 2 + EventRejection::NEventRejection;
std::string labels[nBinsEvents];
labels[0] = "processed";
labels[1] = "selected";
labels[2 + EventRejection::Trigger] = "rej. trigger";
labels[2 + EventRejection::PositionX] = "rej. #it{x}";
labels[2 + EventRejection::PositionY] = "rej. #it{y}";
labels[2 + EventRejection::PositionZ] = "rej. #it{z}";
labels[2 + EventRejection::NContrib] = "rej. # of contributors";
labels[2 + EventRejection::Chi2] = "rej. #it{#chi}^{2}";
AxisSpec axisEvents = {nBinsEvents, 0.5, nBinsEvents + 0.5, ""};
registry.add("hEvents", "Events;;entries", HistType::kTH1F, {axisEvents});
for (int iBin = 0; iBin < nBinsEvents; iBin++) {
registry.get<TH1>(HIST("hEvents"))->GetXaxis()->SetBinLabel(iBin + 1, labels[iBin].data());
}
}

// event selection
void processEvSel(soa::Join<aod::Collisions, aod::EvSels>::iterator const& collision)
/// Primary-vertex selection
/// \param collision collision table row
/// \param statusCollision bit map with rejection results
template <typename Col>
void selectVertex(const Col& collision, int& statusCollision)
{
// x position
if (collision.posX() < xVertexMin || collision.posX() > xVertexMax) {
SETBIT(statusCollision, EventRejection::PositionX);
if (fillHistograms) {
registry.get<TH1>(HIST("hEvents"))->Fill(3 + EventRejection::PositionX);
}
}
// y position
if (collision.posY() < yVertexMin || collision.posY() > yVertexMax) {
SETBIT(statusCollision, EventRejection::PositionY);
if (fillHistograms) {
registry.get<TH1>(HIST("hEvents"))->Fill(3 + EventRejection::PositionY);
}
}
// z position
if (collision.posZ() < zVertexMin || collision.posZ() > zVertexMax) {
SETBIT(statusCollision, EventRejection::PositionZ);
if (fillHistograms) {
registry.get<TH1>(HIST("hEvents"))->Fill(3 + EventRejection::PositionZ);
}
}
// number of contributors
if (collision.numContrib() < nContribMin) {
SETBIT(statusCollision, EventRejection::NContrib);
if (fillHistograms) {
registry.get<TH1>(HIST("hEvents"))->Fill(3 + EventRejection::NContrib);
}
}
// chi^2
if (chi2Max > 0. && collision.chi2() > chi2Max) {
SETBIT(statusCollision, EventRejection::Chi2);
if (fillHistograms) {
registry.get<TH1>(HIST("hEvents"))->Fill(3 + EventRejection::Chi2);
}
}
}

/// Event selection with trigger selection
void processTrigSel(soa::Join<aod::Collisions, aod::EvSels>::iterator const& collision)
{
int statusCollision = 0;

// processed events
if (fillHistograms) {
registry.get<TH1>(HIST("hEvents"))->Fill(1);
}

// trigger selection
if (!collision.alias()[triggerClass]) {
statusCollision |= BIT(0);
SETBIT(statusCollision, EventRejection::Trigger);
if (fillHistograms) {
registry.get<TH1>(HIST("hEvents"))->Fill(3);
registry.get<TH1>(HIST("hEvents"))->Fill(3 + EventRejection::Trigger);
}
}

// vertex selection
selectVertex(collision, statusCollision);

//TODO: add more event selection criteria

// selected events
Expand All @@ -122,23 +198,31 @@ struct HfTagSelCollisions {
rowSelectedCollision(statusCollision);
};

PROCESS_SWITCH(HfTagSelCollisions, processEvSel, "Use event selection", true);
PROCESS_SWITCH(HfTagSelCollisions, processTrigSel, "Use trigger selection", true);

// no event selection in case of no event-selection task attached
void processNoEvSel(aod::Collision const&)
/// Event selection without trigger selection
void processNoTrigSel(aod::Collision const& collision)
{
int statusCollision = 0;

// processed events
if (fillHistograms) {
registry.get<TH1>(HIST("hEvents"))->Fill(1);
}

// vertex selection
selectVertex(collision, statusCollision);

// selected events
if (fillHistograms && statusCollision == 0) {
registry.get<TH1>(HIST("hEvents"))->Fill(2);
}

// fill table row
rowSelectedCollision(statusCollision);
};

PROCESS_SWITCH(HfTagSelCollisions, processNoEvSel, "Do not use event selection", false);
PROCESS_SWITCH(HfTagSelCollisions, processNoTrigSel, "Do not use trigger selection", false);
};

/// Track selection
Expand Down Expand Up @@ -1474,18 +1558,18 @@ WorkflowSpec defineDataProcessing(ConfigContext const& cfgc)
{
WorkflowSpec workflow{};

const bool doEvSel = cfgc.options().get<bool>("doEvSel");
if (doEvSel) {
const bool doTrigSel = cfgc.options().get<bool>("doTrigSel");
if (doTrigSel) {
workflow.push_back(adaptAnalysisTask<HfTagSelCollisions>(cfgc));
} else {
workflow.push_back(adaptAnalysisTask<HfTagSelCollisions>(cfgc, SetDefaultProcesses{{{"processEvSel", false}, {"processNoEvSel", true}}}));
workflow.push_back(adaptAnalysisTask<HfTagSelCollisions>(cfgc, SetDefaultProcesses{{{"processTrigSel", false}, {"processNoTrigSel", true}}}));
}

workflow.push_back(adaptAnalysisTask<HfTagSelTracks>(cfgc));
workflow.push_back(adaptAnalysisTask<HfTrackIndexSkimsCreator>(cfgc));

const bool doLcK0Sp = cfgc.options().get<bool>("do-LcK0Sp");
if (doLcK0Sp) {
const bool doCascades = cfgc.options().get<bool>("doCascades");
if (doCascades) {
workflow.push_back(adaptAnalysisTask<HfTrackIndexSkimsCreatorCascades>(cfgc));
}

Expand Down