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PWGHF: Update of the Lc->pKpi selector and task #5013

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Merged
jgrosseo merged 1 commit into from
Jan 4, 2021
Merged

PWGHF: Update of the Lc->pKpi selector and task #5013

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5 changes: 3 additions & 2 deletions Analysis/DataModel/include/AnalysisDataModel/HFCandidateSelectionTables.h
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Original file line number Diff line number Diff line change
Expand Up @@ -25,9 +25,10 @@ namespace o2::aod
{
namespace hf_selcandidate_lc
{
DECLARE_SOA_COLUMN(IsSelLc, isSelLc, int);
DECLARE_SOA_COLUMN(IsSelLcpKpi, isSelLcpKpi, int);
DECLARE_SOA_COLUMN(IsSelLcpiKp, isSelLcpiKp, int);
} // namespace hf_selcandidate_lc
DECLARE_SOA_TABLE(HFSelLcCandidate, "AOD", "HFSELLCCAND", hf_selcandidate_lc::IsSelLc);
DECLARE_SOA_TABLE(HFSelLcCandidate, "AOD", "HFSELLCCAND", hf_selcandidate_lc::IsSelLcpKpi, hf_selcandidate_lc::IsSelLcpiKp);
} // namespace o2::aod

#endif // O2_ANALYSIS_HFCANDIDATESELECTIONTABLES_H_
10 changes: 9 additions & 1 deletion Analysis/DataModel/include/AnalysisDataModel/HFSecondaryVertex.h
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Expand Up @@ -234,6 +234,7 @@ DECLARE_SOA_TABLE(HfCandProng2Base, "AOD", "HFCANDP2BASE",
hf_cand::ImpactParameter0, hf_cand::ImpactParameter1,
hf_cand::ErrorImpactParameter0, hf_cand::ErrorImpactParameter1,
hf_track_index::Index0Id, hf_track_index::Index1Id,
hf_track_index::HFflag,
/* dynamic columns */
hf_cand_prong2::M<hf_cand::PxProng0, hf_cand::PyProng0, hf_cand::PzProng0, hf_cand::PxProng1, hf_cand::PyProng1, hf_cand::PzProng1>,
hf_cand_prong2::M2<hf_cand::PxProng0, hf_cand::PyProng0, hf_cand::PzProng0, hf_cand::PxProng1, hf_cand::PyProng1, hf_cand::PzProng1>,
Expand Down Expand Up @@ -340,10 +341,16 @@ auto ELc(const T& candidate)
}

template <typename T>
auto InvMassLc(const T& candidate)
auto InvMassLcpKpi(const T& candidate)
{
return candidate.m(array{RecoDecay::getMassPDG(kProton), RecoDecay::getMassPDG(kKPlus), RecoDecay::getMassPDG(kPiPlus)});
}

template <typename T>
auto InvMassLcpiKp(const T& candidate)
{
return candidate.m(array{RecoDecay::getMassPDG(kPiPlus), RecoDecay::getMassPDG(kKPlus), RecoDecay::getMassPDG(kProton)});
}
} // namespace hf_cand_prong3

// 3-prong decay candidate table
Expand All @@ -357,6 +364,7 @@ DECLARE_SOA_TABLE(HfCandProng3Base, "AOD", "HFCANDP3BASE",
hf_cand::ImpactParameter0, hf_cand::ImpactParameter1, hf_cand::ImpactParameter2,
hf_cand::ErrorImpactParameter0, hf_cand::ErrorImpactParameter1, hf_cand::ErrorImpactParameter2,
hf_track_index::Index0Id, hf_track_index::Index1Id, hf_track_index::Index2Id,
hf_track_index::HFflag,
/* dynamic columns */
hf_cand_prong3::M<hf_cand::PxProng0, hf_cand::PyProng0, hf_cand::PzProng0, hf_cand::PxProng1, hf_cand::PyProng1, hf_cand::PzProng1, hf_cand::PxProng2, hf_cand::PyProng2, hf_cand::PzProng2>,
hf_cand_prong3::M2<hf_cand::PxProng0, hf_cand::PyProng0, hf_cand::PzProng0, hf_cand::PxProng1, hf_cand::PyProng1, hf_cand::PzProng1, hf_cand::PxProng2, hf_cand::PyProng2, hf_cand::PzProng2>,
Expand Down
3 changes: 2 additions & 1 deletion Analysis/Tasks/PWGHF/HFCandidateCreator2Prong.cxx
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Expand Up @@ -115,7 +115,8 @@ struct HFCandidateCreator2Prong {
pvec1[0], pvec1[1], pvec1[2],
impactParameter0.getY(), impactParameter1.getY(),
std::sqrt(impactParameter0.getSigmaY2()), std::sqrt(impactParameter1.getSigmaY2()),
rowTrackIndexProng2.index0Id(), rowTrackIndexProng2.index1Id());
rowTrackIndexProng2.index0Id(), rowTrackIndexProng2.index1Id(),
rowTrackIndexProng2.hfflag());

// fill histograms
if (b_dovalplots) {
Expand Down
3 changes: 2 additions & 1 deletion Analysis/Tasks/PWGHF/HFCandidateCreator3Prong.cxx
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Expand Up @@ -121,7 +121,8 @@ struct HFCandidateCreator3Prong {
pvec2[0], pvec2[1], pvec2[2],
impactParameter0.getY(), impactParameter1.getY(), impactParameter2.getY(),
std::sqrt(impactParameter0.getSigmaY2()), std::sqrt(impactParameter1.getSigmaY2()), std::sqrt(impactParameter2.getSigmaY2()),
rowTrackIndexProng3.index0Id(), rowTrackIndexProng3.index1Id(), rowTrackIndexProng3.index2Id());
rowTrackIndexProng3.index0Id(), rowTrackIndexProng3.index1Id(), rowTrackIndexProng3.index2Id(),
rowTrackIndexProng3.hfflag());

// fill histograms
if (b_dovalplots) {
Expand Down
2 changes: 1 addition & 1 deletion Analysis/Tasks/PWGHF/HFD0CandidateSelector.cxx
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Expand Up @@ -177,7 +177,7 @@ struct HFD0CandidateSelector {
}
}

if (TMath::Abs(trackPion.pt()) < TMath::Abs(cuts[pTBin][4]) || TMath::Abs(trackKaon.pt()) < TMath::Abs(cuts[pTBin][3])) {
if (trackPion.pt() < cuts[pTBin][4] || trackKaon.pt() < cuts[pTBin][3]) {
return false; //cut on daughter pT
}
if (TMath::Abs(trackPion.dcaPrim0()) > cuts[pTBin][6] || TMath::Abs(trackKaon.dcaPrim0()) > cuts[pTBin][5]) {
Expand Down
110 changes: 62 additions & 48 deletions Analysis/Tasks/PWGHF/HFLcCandidateSelector.cxx
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Expand Up @@ -11,7 +11,7 @@
/// \file HFD0CandidateSelector.cxx
/// \brief Lc->pKpi selection task.
///
/// \author Luigi Dello Stritto <luigi.dellostritto@cern.ch>, CERN
/// \author Luigi Dello Stritto <luigi.dello.stritto@cern.ch>, University and INFN SALERNO
/// \author Nima Zardoshti <nima.zardoshti@cern.ch>, CERN

#include "Framework/runDataProcessing.h"
Expand All @@ -27,19 +27,18 @@ static const int npTBins = 10;
static const int nCutVars = 8;
//temporary until 2D array in configurable is solved - then move to json
//m ptp ptk ptpi DCA sigmavtx dlenght cosp
constexpr double cuts[npTBins][nCutVars] = {{0.5, 0.2, 0.2, 0.2, 0.05, 0.09, 0.005, 0.}, /* pt<1 */
{0.5, 0.2, 0.2, 0.2, 0.05, 0.09, 0.005, 0.}, /* 1<pt<2 */
{0.5, 0.2, 0.2, 0.2, 0.05, 0.09, 0.005, 0.}, /* 2<pt<3 */
{0.5, 0.2, 0.2, 0.2, 0.05, 0.09, 0.005, 0.}, /* 3<pt<4 */
{0.5, 0.2, 0.2, 0.2, 0.05, 0.09, 0.005, 0.}, /* 4<pt<5 */
{0.5, 0.2, 0.2, 0.2, 0.05, 0.09, 0.005, 0.}, /* 5<pt<6 */
{0.5, 0.2, 0.2, 0.2, 0.05, 0.09, 0.005, 0.}, /* 6<pt<8 */
{0.5, 0.2, 0.2, 0.2, 0.05, 0.09, 0.005, 0.}, /* 8<pt<12 */
{0.5, 0.2, 0.2, 0.2, 0.05, 0.09, 0.005, 0.}, /* 12<pt<24 */
{0.5, 0.2, 0.2, 0.2, 0.05, 0.09, 0.005, 0.}}; /* 24<pt<36 */
constexpr double cuts[npTBins][nCutVars] = {{0.400, 0.4, 0.4, 0.4, 0.05, 0.09, 0.005, 0.}, /* pt<1 */
{0.400, 0.4, 0.4, 0.4, 0.05, 0.09, 0.005, 0.}, /* 1<pt<2 */
{0.400, 0.4, 0.4, 0.4, 0.05, 0.09, 0.005, 0.}, /* 2<pt<3 */
{0.400, 0.4, 0.4, 0.4, 0.05, 0.09, 0.005, 0.}, /* 3<pt<4 */
{0.400, 0.4, 0.4, 0.4, 0.05, 0.09, 0.005, 0.}, /* 4<pt<5 */
{0.400, 0.4, 0.4, 0.4, 0.05, 0.09, 0.005, 0.}, /* 5<pt<6 */
{0.400, 0.4, 0.4, 0.4, 0.05, 0.09, 0.005, 0.}, /* 6<pt<8 */
{0.400, 0.4, 0.4, 0.4, 0.05, 0.09, 0.005, 0.}, /* 8<pt<12 */
{0.400, 0.4, 0.4, 0.4, 0.05, 0.09, 0.005, 0.}, /* 12<pt<24 */
{0.400, 0.4, 0.4, 0.4, 0.05, 0.09, 0.005, 0.}}; /* 24<pt<36 */

/// Struct for applying Lc selection cuts

struct HFLcCandidateSelector {

Produces<aod::HFSelLcCandidate> hfSelLcCandidate;
Expand Down Expand Up @@ -107,15 +106,16 @@ struct HFLcCandidateSelector {
if (candpT < d_pTCandMin || candpT >= d_pTCandMax) {
return false; //check that the candidate pT is within the analysis range
}

if (hfCandProng3.cpa() <= cuts[pTBin][7]) {
return false; //cosine of pointing angle
}
// if (hfCandProng3.dca() > cuts[pTBin][4]) return false; //candidate DCA
if (hfCandProng3.chi2PCA() > cuts[pTBin][5]) { //candidate DCA

/* if (hfCandProng3.chi2PCA() > cuts[pTBin][5]) { //candidate DCA
return false;
}
}*/

if (hfCandProng3.decayLength() * hfCandProng3.decayLength() < cuts[pTBin][6] * cuts[pTBin][6]) {
if (hfCandProng3.decayLength() <= cuts[pTBin][6]) {
return false;
}
return true;
Expand All @@ -126,7 +126,6 @@ struct HFLcCandidateSelector {
/// \param trackProton is the track with the proton hypothesis
/// \param trackPion is the track with the pion hypothesis
/// \param trackKaon is the track with the kaon hypothesis
/// \note trackPion = positive and trackKaon = negative for D0 selection and inverse for D0bar
/// \return true if candidate passes all cuts for the given Conjugate
template <typename T1, typename T2>
bool selectionTopolConjugate(const T1& hfCandProng3, const T2& trackProton, const T2& trackKaon, const T2& trackPion)
Expand All @@ -138,18 +137,19 @@ struct HFLcCandidateSelector {
return false;
}

//invariant mass cut
if (TMath::Abs(InvMassLc(hfCandProng3) - RecoDecay::getMassPDG(4122)) > cuts[pTBin][0]) {
return false;
}

if (TMath::Abs(trackProton.pt()) < TMath::Abs(cuts[pTBin][1]) || TMath::Abs(trackKaon.pt()) < TMath::Abs(cuts[pTBin][2]) || TMath::Abs(trackPion.pt()) < TMath::Abs(cuts[pTBin][3])) {
if (trackProton.pt() < cuts[pTBin][1] || trackKaon.pt() < cuts[pTBin][2] || trackPion.pt() < cuts[pTBin][3]) {
return false; //cut on daughter pT
}

/* if (TMath::Sqrt( trackProton.dcaPrim0()*trackProton.dcaPrim0() + trackKaon.dcaPrim0()*trackKaon.dcaPrim0() + trackPion.dcaPrim0()*trackPion.dcaPrim0() ) > cuts[pTBin][5]) {
return false; //cut on daughter dca - need to add secondary vertex constraint here
}*/
if (trackProton.globalIndex() == hfCandProng3.index0Id()) {
if (TMath::Abs(InvMassLcpKpi(hfCandProng3) - RecoDecay::getMassPDG(4122)) > cuts[pTBin][0]) {
return false;
}
} else {
if (TMath::Abs(InvMassLcpiKp(hfCandProng3) - RecoDecay::getMassPDG(4122)) > cuts[pTBin][0]) {
return false;
}
}

return true;
}
Expand Down Expand Up @@ -190,17 +190,17 @@ struct HFLcCandidateSelector {
template <typename T>
bool selectionPIDTPC(const T& track, int nPDG, int nSigmaCut)
{
double nSigma = 100.0; //arbitarily large value
double nSigma = 1.0; //arbitarily large value
nPDG = TMath::Abs(nPDG);
if (nPDG == 2212) {
/* if (nPDG == 2212) {
nSigma = track.tpcNSigmaPr();
} else if (nPDG == 321) {
nSigma = track.tpcNSigmaKa();
} else if (nPDG == 111) {
nSigma = track.tpcNSigmaPi();
} else {
return false;
}
}*/
return nSigma < nSigmaCut;
}

Expand All @@ -213,17 +213,17 @@ struct HFLcCandidateSelector {
template <typename T>
bool selectionPIDTOF(const T& track, int nPDG, int nSigmaCut)
{
double nSigma = 100.0; //arbitarily large value
double nSigma = 1.; //arbitarily large value
nPDG = TMath::Abs(nPDG);
if (nPDG == 2212) {
/* if (nPDG == 2212) {
nSigma = track.tofNSigmaPr();
} else if (nPDG == 321) {
nSigma = track.tofNSigmaKa();
} else if (nPDG == 321) {
nSigma = track.tofNSigmaPi();
} else {
return false;
}
}*/
return nSigma < nSigmaCut;
}

Expand Down Expand Up @@ -279,42 +279,53 @@ struct HFLcCandidateSelector {

void process(aod::HfCandProng3 const& hfCandProng3s, aod::BigTracksPID const& tracks)
{
int statusLc; // final selection flag : 0-rejected 1-accepted
bool topolLc;
int statusLcpKpi, statusLcpiKp; // final selection flag : 0-rejected 1-accepted
bool topolLcpKpi, topolLcpiKp;
int pidLc, proton, kaonMinus, pionPlus;

for (auto& hfCandProng3 : hfCandProng3s) { //looping over 3 prong candidates

auto trackPos1 = hfCandProng3.index0_as<aod::BigTracksPID>(); //positive daughter
auto trackNeg1 = hfCandProng3.index1_as<aod::BigTracksPID>(); //negative daughter
auto trackPos2 = hfCandProng3.index2_as<aod::BigTracksPID>(); //positive daughter
statusLcpKpi = 0;
statusLcpiKp = 0;
int LcFlag = hfCandProng3.hfflag();

statusLc = 0;
topolLc = true;
if (!(LcFlag & 1 << 1)) {
hfSelLcCandidate(statusLcpKpi, statusLcpiKp);
continue;
}

auto trackPos1 = hfCandProng3.index0_as<aod::BigTracksPID>(); //positive daughter (negative for the antiparticles)
auto trackNeg1 = hfCandProng3.index1_as<aod::BigTracksPID>(); //negative daughter (positive for the antiparticles)
auto trackPos2 = hfCandProng3.index2_as<aod::BigTracksPID>(); //positive daughter (negative for the antiparticles)

topolLcpKpi = true;
topolLcpiKp = true;
pidLc = -1;
proton = -1;
kaonMinus = -1;
pionPlus = -1;

// daughter track validity selection
if (!daughterSelection(trackPos1) || !daughterSelection(trackNeg1) || !daughterSelection(trackPos2)) {
hfSelLcCandidate(statusLc);
hfSelLcCandidate(statusLcpKpi, statusLcpiKp);
continue;
}

//implement filter bit 4 cut - should be done before this task at the track selection level

//conjugate independent topological selection
if (!selectionTopol(hfCandProng3)) {
hfSelLcCandidate(statusLc);
hfSelLcCandidate(statusLcpKpi, statusLcpiKp);
continue;
}

//conjugate dependent toplogical selection for Lc
topolLc = selectionTopolConjugate(hfCandProng3, trackPos1, trackNeg1, trackPos2);

if (!topolLc) {
hfSelLcCandidate(statusLc);
topolLcpKpi = selectionTopolConjugate(hfCandProng3, trackPos1, trackNeg1, trackPos2);
topolLcpiKp = selectionTopolConjugate(hfCandProng3, trackPos2, trackNeg1, trackPos1);

if (!topolLcpKpi && !topolLcpiKp) {
hfSelLcCandidate(statusLcpKpi, statusLcpiKp);
continue;
}

Expand All @@ -330,15 +341,18 @@ struct HFLcCandidateSelector {
}

if (pidLc == 0) {
hfSelLcCandidate(statusLc);
hfSelLcCandidate(statusLcpKpi, statusLcpiKp);
continue;
}

if ((pidLc == -1 || pidLc == 1) && topolLc) {
statusLc = 1; //identified as Lc
if ((pidLc == -1 || pidLc == 1) && topolLcpKpi) {
statusLcpKpi = 1; //identified as Lc
}
if ((pidLc == -1 || pidLc == 1) && topolLcpiKp) {
statusLcpiKp = 1; //identified as Lc
}

hfSelLcCandidate(statusLc);
hfSelLcCandidate(statusLcpKpi, statusLcpiKp);
}
}
};
Expand Down
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