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[PWGHF,Trigger] Separate proton pt threshold for LcRes and ThetaC #10947

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fgrosa merged 3 commits into from
Apr 23, 2025
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[PWGHF,Trigger] Separate proton pt threshold for LcRes and ThetaC #10947

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a2ebb82
[PWGHF,Trigger] Separate pt Cuts for Lc resonanaces and ThetaC
apalasciano Apr 23, 2025
abad8eb
fix
apalasciano Apr 23, 2025
8b1e631
fix
apalasciano Apr 23, 2025
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13 changes: 10 additions & 3 deletions EventFiltering/PWGHF/HFFilter.cxx
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Original file line number Diff line number Diff line change
@@ -1,3 +1,3 @@
// Copyright 2019-2020 CERN and copyright holders of ALICE O2.
// See https://alice-o2.web.cern.ch/copyright for details of the copyright holders.
// All rights not expressly granted are reserved.
Expand Down Expand Up @@ -75,7 +75,7 @@
// nsigma PID (except for V0 and cascades)
Configurable<LabeledArray<float>> nSigmaPidCuts{"nSigmaPidCuts", {cutsNsigma[0], 4, 8, labelsRowsNsigma, labelsColumnsNsigma}, "Nsigma cuts for ITS/TPC/TOF PID (except for V0 and cascades)"};
// min and max pts for tracks and bachelors (except for V0 and cascades)
Configurable<LabeledArray<float>> ptCuts{"ptCuts", {cutsPt[0], 2, 9, labelsRowsCutsPt, labelsColumnsCutsPt}, "minimum and maximum pT for bachelor tracks (except for V0 and cascades)"};
Configurable<LabeledArray<float>> ptCuts{"ptCuts", {cutsPt[0], 2, 10, labelsRowsCutsPt, labelsColumnsCutsPt}, "minimum and maximum pT for bachelor tracks (except for V0 and cascades)"};

// parameters for high-pT triggers
Configurable<LabeledArray<float>> ptThresholds{"ptThresholds", {cutsHighPtThresholds[0], 1, 2, labelsEmpty, labelsColumnsHighPtThresholds}, "pT treshold for high pT charm hadron candidates for kHighPt triggers in GeV/c"};
Expand Down Expand Up @@ -136,8 +136,8 @@

// CCDB configuration
o2::ccdb::CcdbApi ccdbApi;
Service<o2::ccdb::BasicCCDBManager> ccdb;

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[pwghf/struct-member-order] 

HfFilter: Service< appears too early (before end of Configurable<).
Configurable<std::string> url{"ccdb-url", "http://alice-ccdb.cern.ch", "url of the ccdb repository"};

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[name/configurable] 

Use lowerCamelCase for names of configurables and use the same name for the struct member as for the JSON string. (Declare the type and names on the same line.)
int currentRun{0}; // needed to detect if the run changed and trigger update of calibrations etc.

// TPC PID calibrations
Expand Down Expand Up @@ -167,7 +167,7 @@
o2::vertexing::DCAFitterN<3> dfBtoDstar; // fitter for Beauty Hadron to D* vertex (3-prong vertex fitter)
o2::vertexing::DCAFitterN<2> dfStrangeness; // fitter for V0s and cascades (2-prong vertex fitter)

HistogramRegistry registry{"registry"};

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[pwghf/struct-member-order] 

HfFilter: HistogramRegistry appears too early (before end of PresliceUnsorted<).
std::shared_ptr<TH1> hProcessedEvents;

// QA histos
Expand Down Expand Up @@ -208,6 +208,7 @@
helper.setPtLimitsDeuteronForFemto(ptCuts->get(0u, 6u), ptCuts->get(1u, 6u));
helper.setPtLimitsCharmBaryonBachelor(ptCuts->get(0u, 3u), ptCuts->get(1u, 3u));
helper.setPtLimitsLcResonanceBachelor(ptCuts->get(0u, 8u), ptCuts->get(1u, 8u));
helper.setPtLimitsThetaCBachelor(ptCuts->get(0u, 9u), ptCuts->get(1u, 9u));
helper.setCutsSingleTrackBeauty(cutsTrackBeauty3Prong, cutsTrackBeauty4Prong, cutsTrackBeauty4Prong);
helper.setCutsSingleTrackCharmBaryonBachelor(cutsTrackCharmBaryonBachelor);
helper.setCutsBhadrons(cutsBtoHadrons.cutsBplus, cutsBtoHadrons.cutsBzeroToDstar, cutsBtoHadrons.cutsBc, cutsBtoHadrons.cutsBzero, cutsBtoHadrons.cutsBs, cutsBtoHadrons.cutsLb, cutsBtoHadrons.cutsXib);
Expand Down Expand Up @@ -241,7 +242,7 @@

hProcessedEvents = registry.add<TH1>("fProcessedEvents", "HF - event filtered;;counts", HistType::kTH1D, {{kNtriggersHF + 2, -0.5, +kNtriggersHF + 1.5}});
for (auto iBin = 0; iBin < kNtriggersHF + 2; ++iBin) {
if (iBin < 2)

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[magic-number] 

Avoid magic numbers in expressions. Assign the value to a clearly named variable or constant.
hProcessedEvents->GetXaxis()->SetBinLabel(iBin + 1, eventTitles[iBin].data());
else
hProcessedEvents->GetXaxis()->SetBinLabel(iBin + 1, hfTriggerNames[iBin - 2].data());
Expand Down Expand Up @@ -388,7 +389,7 @@
for (const auto& collision : collisions) {

bool keepEvent[kNtriggersHF]{false};
if (!collision.sel8() || std::fabs(collision.posZ()) > 11.f) { // safety margin for Zvtx

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[magic-number] 

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tags(keepEvent[kHighPt2P], keepEvent[kHighPt3P], keepEvent[kBeauty3P], keepEvent[kBeauty4P], keepEvent[kFemto2P], keepEvent[kFemto3P], keepEvent[kDoubleCharm2P], keepEvent[kDoubleCharm3P], keepEvent[kDoubleCharmMix], keepEvent[kV0Charm2P], keepEvent[kV0Charm3P], keepEvent[kCharmBarToXiBach], keepEvent[kSigmaCPPK], keepEvent[kSigmaC0K0], keepEvent[kPhotonCharm2P], keepEvent[kPhotonCharm3P], keepEvent[kSingleCharm2P], keepEvent[kSingleCharm3P], keepEvent[kSingleNonPromptCharm2P], keepEvent[kSingleNonPromptCharm3P], keepEvent[kCharmBarToXi2Bach], keepEvent[kPrCharm2P], keepEvent[kBtoJPsiKa], keepEvent[kBtoJPsiKstar], keepEvent[kBtoJPsiPhi], keepEvent[kBtoJPsiPrKa], keepEvent[kBtoJPsiPi]);
continue;
}
Expand Down Expand Up @@ -467,7 +468,7 @@
std::vector<float> scores{};
if (preselD0) {
scores.insert(scores.end(), cand2Prong.mlProbSkimD0ToKPi().begin(), cand2Prong.mlProbSkimD0ToKPi().end());
if (scores.size() != 3) {

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Avoid magic numbers in expressions. Assign the value to a clearly named variable or constant.
scores.resize(3);
scores[0] = 2.;
scores[1] = -1.;
Expand Down Expand Up @@ -977,11 +978,14 @@
o2::base::Propagator::Instance()->propagateToDCABxByBz({collision.posX(), collision.posY(), collision.posZ()}, trackParBachelorProton, 2.f, noMatCorr, &dcaInfoBachProton);
}
std::array<float, 3> pVecProton = trackProton.pVector();
bool isSelProton = helper.isSelectedProtonFromLcReso(trackProton);
if (isSelProton) {
bool isSelPIDProton = helper.isSelectedProton4CharmOrBeautyBaryons<false>(trackProton);
if (isSelPIDProton) {
if (!keepEvent[kPrCharm2P]) {
// we first look for a D*+
for (const auto& trackBachelorId : trackIdsThisCollision) { // start loop over tracks to find bachelor pion
if (!helper.isSelectedProtonFromLcResoOrThetaC<true>(trackProton)) {
continue;
} // stop here if proton below pT threshold for thetaC to avoid computational losses
auto trackBachelor = tracks.rawIteratorAt(trackBachelorId.trackId());
if (trackBachelor.globalIndex() == trackPos.globalIndex() || trackBachelor.globalIndex() == trackNeg.globalIndex() || trackBachelor.globalIndex() == trackProton.globalIndex()) {
continue;
Expand Down Expand Up @@ -1064,6 +1068,9 @@
if (pt2Prong < cutsPtDeltaMassCharmReso->get(3u, 11u)) {
continue;
}
if (!helper.isSelectedProtonFromLcResoOrThetaC(trackProton)) {
continue;
}
float massLcStarCand{-999.}, massLcStarBarCand{-999.};
float massDiffLcStarCand{-999.}, massDiffLcStarBarCand{-999.};
bool isRightSignLcStar{false}, isRightSignLcStarBar{false};
Expand Down Expand Up @@ -1180,7 +1187,7 @@
continue;
}

if (scores[iCharmPart].size() != 3) {

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[magic-number] 

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scores[iCharmPart].resize(3);
scores[iCharmPart][0] = 2.;
scores[iCharmPart][1] = -1.;
Expand Down Expand Up @@ -1407,7 +1414,7 @@
// check the candidate SigmaC++ charge
std::array<int, 4> chargesSc = {trackFirst.sign(), trackSecond.sign(), trackThird.sign(), trackSoftPi.sign()};
int chargeSc = std::accumulate(chargesSc.begin(), chargesSc.end(), 0); // SIGNED electric charge of SigmaC candidate
if (std::abs(chargeSc) != 2) {

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continue;
}

Expand Down Expand Up @@ -1729,7 +1736,7 @@
gpu::gpustd::array<float, 2> dcaInfo;
o2::track::TrackParCov trackParCasc;
o2::track::TrackParCov trackParCascTrack;
if (requireStrangenessTrackingAny < 2) { // needed for at least one of the two

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trackParCasc = o2::track::TrackParCov(cascCand.vtx, cascCand.mom, cascCand.cov, cascCand.sign, true);
trackParCasc.setPID(o2::track::PID::XiMinus);
trackParCasc.setAbsCharge(1); // to be sure
Expand Down
34 changes: 22 additions & 12 deletions EventFiltering/PWGHF/HFFilterHelpers.h
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Expand Up @@ -298,9 +298,9 @@ constexpr float cutsPtThresholdsForFemto[1][2] = {{8., 1.4}}; // proton, deutero
static const std::vector<std::string> labelsColumnsPtThresholdsForFemto = {"Proton", "Deuteron"};

// min and max pT for all tracks combined (except for V0 and cascades)
constexpr float cutsPt[2][9] = {{1., 0.1, 0.8, 0.5, 0.1, 0.2, 0.4, 0.5, 0.3},
{100000., 100000., 5., 100000., 100000., 100000., 100000., 100000., 100000.}}; // beauty, D*, femto, SigmaC, Xic*+ -> SigmaC++K-, beauty to JPsi, Lc*->D0p
static const std::vector<std::string> labelsColumnsCutsPt = {"Beauty", "DstarPlus", "PrForFemto", "CharmBaryon", "SoftPiSigmaC", "SoftKaonXicResoToSigmaC", "DeForFemto", "BeautyToJPsi", "PrForLcReso"};
constexpr float cutsPt[2][10] = {{1., 0.1, 0.8, 0.5, 0.1, 0.2, 0.4, 0.5, 0.3, 0.3},
{100000., 100000., 5., 100000., 100000., 100000., 100000., 100000., 100000., 100000.}}; // beauty, D*, femto, SigmaC, Xic*+ -> SigmaC++K-, beauty to JPsi, Lc*->D0p
static const std::vector<std::string> labelsColumnsCutsPt = {"Beauty", "DstarPlus", "PrForFemto", "CharmBaryon", "SoftPiSigmaC", "SoftKaonXicResoToSigmaC", "DeForFemto", "BeautyToJPsi", "PrForLcReso", "PrForThetaC"};
static const std::vector<std::string> labelsRowsCutsPt = {"Minimum", "Maximum"};

// PID cuts
Expand Down Expand Up @@ -481,6 +481,11 @@ class HfFilterHelper
mPtMinLcResonanceBachelor = minPt;
mPtMaxLcResonanceBachelor = maxPt;
}
void setPtLimitsThetaCBachelor(float minPt, float maxPt)
{
mPtMinThetaCBachelor = minPt;
mPtMaxThetaCBachelor = maxPt;
}

void setNsigmaProtonCutsForFemto(std::array<float, 4> nSigmaCuts) { mNSigmaPrCutsForFemto = nSigmaCuts; }
void setNsigmaDeuteronCutsForFemto(std::array<float, 4> nSigmaCuts) { mNSigmaDeCutsForFemto = nSigmaCuts; }
Expand Down Expand Up @@ -628,8 +633,8 @@ class HfFilterHelper
bool isSelectedXiBach(T const& trackParCasc, T const& trackParBachelor, int8_t isSelBachelor, C const& collision, o2::vertexing::DCAFitterN<2>& dcaFitter, const int& activateQA, H2 hMassVsPtXiPi, H2 hMassVsPtXiKa);
template <int Nprongs, typename T, typename C, typename H2>
bool isSelectedXiBachBach(T const& trackParCasc, std::array<T, 2> const& trackParBachelor, C const& collision, o2::vertexing::DCAFitterN<Nprongs>& dcaFitter, const int& activateQA, H2 hMassVsPtXiPiPi);
template <typename T>
bool isSelectedProtonFromLcReso(const T& track);
template <bool is4ThetaC = false, typename T>
bool isSelectedProtonFromLcResoOrThetaC(const T& track);
// helpers
template <typename T>
T computeRelativeMomentum(const std::array<T, 3>& pTrack, const std::array<T, 3>& CharmCandMomentum, const T& CharmMass);
Expand Down Expand Up @@ -682,13 +687,15 @@ class HfFilterHelper
float mPtMinDeuteronForFemto{0.8}; // minimum pt for the deuteron for femto
float mPtMinCharmBaryonBachelor{0.5}; // minimum pt for the bachelor pion from Xic/Omegac decays
float mPtMinLcResonanceBachelor{0.3}; // minimum pt for the bachelor proton from Lc resonance decays
float mPtMinThetaCBachelor{0.3}; // minimum pt for the bachelor proton from ThetaC decays
float mPtMaxSoftPionForDstar{2.}; // maximum pt for the D*+ soft pion
float mPtMaxBeautyBachelor{100000.}; // maximum pt for the b-hadron pion daughter
float mPtMaxBeautyToJPsiBachelor{100000.}; // maximum pt for the b-hadron -> JPsi X daughters (not the muons)
float mPtMaxProtonForFemto{5.0}; // maximum pt for the proton for femto
float mPtMaxDeuteronForFemto{5.0}; // maximum pt for the deuteron for femto
float mPtMaxCharmBaryonBachelor{100000.}; // maximum pt for the bachelor pion from Xic/Omegac decays
float mPtMaxLcResonanceBachelor{100000.}; // maximum pt for the bachelor proton from Lc resonance decays
float mPtMaxThetaCBachelor{100000.}; // maximum pt for the bachelor proton from ThetaC decays
float mPtThresholdProtonForFemto{8.}; // pt threshold to change strategy for proton PID for femto
float mPtThresholdDeuteronForFemto{1.4}; // pt threshold to change strategy for deuteron PID for femto
float mPtMinSigmaCZero{0.f}; // pt min SigmaC0 candidate
Expand Down Expand Up @@ -1945,19 +1952,22 @@ inline bool HfFilterHelper::isSelectedKaon4Charm3ProngOrBeautyToJPsi(const T& tr
/// Basic selection of proton candidates forLc and ThetaC decays
/// \param track is a track
/// \return true if track passes all cuts
template <typename T>
inline bool HfFilterHelper::isSelectedProtonFromLcReso(const T& track)
template <bool is4ThetaC, typename T>
inline bool HfFilterHelper::isSelectedProtonFromLcResoOrThetaC(const T& track)
{

// pt selections
float pt = track.pt();
if (pt < mPtMinLcResonanceBachelor || pt > mPtMaxLcResonanceBachelor) {
return false;
if constexpr (is4ThetaC) {
if (pt < mPtMinThetaCBachelor || pt > mPtMaxThetaCBachelor) {
return false;
}
} else {
if (pt < mPtMinLcResonanceBachelor || pt > mPtMaxLcResonanceBachelor) {
return false;
}
}

/// PID selection
return isSelectedProton4CharmOrBeautyBaryons<false>(track);

return true;
}

Expand Down
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