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Merged
fmazzasc merged 6 commits into from
Sep 18, 2025
Merged

[PWGLF] add kstar function #13015

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6ab462a
add kstar function
blacwovie Sep 17, 2025
4692070
Please consider the following formatting changes
alibuild Sep 17, 2025
9ca8625
Merge pull request #31 from alibuild/alibot-cleanup-13015
blacwovie Sep 17, 2025
a2e9a28
Update he3HadronFemto.cxx
blacwovie Sep 18, 2025
21c8972
Please consider the following formatting changes
alibuild Sep 18, 2025
0553dd9
Merge pull request #33 from alibuild/alibot-cleanup-13015
blacwovie Sep 18, 2025
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97 changes: 95 additions & 2 deletions PWGLF/TableProducer/Nuspex/he3HadronFemto.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -15,6 +15,7 @@
/// \author Your Name (your.email@cern.ch)
/// \since April 2025

#include "PWGCF/FemtoWorld/Core/FemtoWorldMath.h"
#include "PWGLF/DataModel/EPCalibrationTables.h"
#include "PWGLF/DataModel/LFhe3HadronTables.h"
#include "PWGLF/Utils/svPoolCreator.h"
Expand Down Expand Up @@ -48,7 +49,7 @@
#include "Framework/runDataProcessing.h"
#include "ReconstructionDataFormats/Track.h"

#include <TDatabasePDG.h>

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[pdg/database] 

Do not use TDatabasePDG directly. Use o2::constants::physics::Mass... or Service<o2::framework::O2DatabasePDG> instead.
#include <TDirectory.h>
#include <TFile.h>
#include <TH1F.h>
Expand Down Expand Up @@ -181,6 +182,8 @@

// collision information
int32_t collisionID = 0;

float kstarfem = 1.f;
};

struct he3HadronFemto {
Expand All @@ -195,10 +198,12 @@
Configurable<float> settingCutRigidityMinHe3{"settingCutRigidityMinHe3", 0.8f, "Minimum rigidity for He3"};
Configurable<float> settingCutEta{"settingCutEta", 0.9f, "Eta cut on daughter track"};
Configurable<float> settingCutDCAxy{"settingCutDCAxy", 2.0f, "DCAxy range for tracks"};
Configurable<float> settingCutDCAz{"settingCutDCAz", 2.0f, "DCAz range for tracks"};
Configurable<float> settingCutDCAz{"settingCutDCAz", 3.0f, "DCAz range for tracks"};
Configurable<float> settingCutChi2tpcLow{"settingCutChi2tpcLow", 0.5f, "Low cut on TPC chi2"};
Configurable<float> settingCutInvMass{"settingCutInvMass", 0.0f, "Invariant mass upper limit"};
Configurable<float> settingCutPtMinhe3Had{"settingCutPtMinhe3Had", 0.0f, "Minimum PT cut on he3Had4"};
Configurable<float> settingCutPtMinHad{"settingCutPtMinHad", 0.0f, "Minimum PT cut on Hadron"};
Configurable<float> settingCutPtMaxHad{"settingCutPtMaxHad", 0.0f, "Maximum PT cut on Hadron"};
Configurable<float> settingCutClSizeItsHe3{"settingCutClSizeItsHe3", 4.0f, "Minimum ITS cluster size for He3"};
Configurable<float> settingCutNCls{"settingCutNCls", 5.0f, "Minimum ITS Ncluster for tracks"};
Configurable<float> settingCutChi2NClITS{"settingCutChi2NClITS", 36.f, "Maximum ITS Chi2 for tracks"};
Expand Down Expand Up @@ -287,6 +292,14 @@
{"h2NsigmaHadronTPC_preselection", "NsigmaHe3 TPC distribution; #it{p}_{T} (GeV/#it{c}); n#sigma_{TPC}(had)", {HistType::kTH2F, {{100, -5.0f, 5.0f}, {400, -10.0f, 10.0f}}}},
{"h2NsigmaHadronTOF", "NsigmaHadron TOF distribution; #it{p}_{T} (GeV/#it{c}); n#sigma_{TOF}(had)", {HistType::kTH2F, {{20, -5.0f, 5.0f}, {200, -5.0f, 5.0f}}}},
{"h2NsigmaHadronTOF_preselection", "NsigmaHadron TOF distribution; #it{p}_{T} (GeV/#it{c}); n#sigma_{TOF}(had)", {HistType::kTH2F, {{100, -5.0f, 5.0f}, {400, -10.0f, 10.0f}}}},
{"hKstarLSmatter", ";kStar (GeV/c)", {HistType::kTH1F, {{300, 0.0f, 3.0f}}}},
{"hKstarLSantimatter", ";kStar (GeV/c)", {HistType::kTH1F, {{300, 0.0f, 3.0f}}}},
{"hKstarUSmatter", ";kStar (GeV/c)", {HistType::kTH1F, {{300, 0.0f, 3.0f}}}},
{"hKstarUSantimatter", ";kStar (GeV/c)", {HistType::kTH1F, {{300, 0.0f, 3.0f}}}},
{"hKstarLSmatter_femto", ";kStar (GeV/c)", {HistType::kTH1F, {{300, 0.0f, 3.0f}}}},
{"hKstarLSantimatter_femto", ";kStar (GeV/c)", {HistType::kTH1F, {{300, 0.0f, 3.0f}}}},
{"hKstarUSmatter_femto", ";kStar (GeV/c)", {HistType::kTH1F, {{300, 0.0f, 3.0f}}}},
{"hKstarUSantimatter_femto", ";kStar (GeV/c)", {HistType::kTH1F, {{300, 0.0f, 3.0f}}}},
},
OutputObjHandlingPolicy::AnalysisObject,
false,
Expand Down Expand Up @@ -427,7 +440,8 @@
candidate.tpcNClsCrossedRows() < crossedRowsToFindableRatio * candidate.tpcNClsFindable() ||
candidate.tpcChi2NCl() > maxChi2NCl ||
candidate.tpcChi2NCl() < settingCutChi2tpcLow ||
candidate.itsChi2NCl() > settingCutChi2NClITS) {
candidate.itsChi2NCl() > settingCutChi2NClITS || candidate.dcaXY() > settingCutDCAxy ||
candidate.dcaZ() > settingCutDCAz) {
return false;
}

Expand Down Expand Up @@ -566,7 +580,7 @@
std::array<float, 3> collisionVertex = getCollisionVertex(collisions, collIdx);
const auto& pca = mFitter.getPCACandidate();
float distance = defaultTodistance;
for (int i = 0; i < 3; i++) {

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[magic-number] 

Avoid magic numbers in expressions. Assign the value to a clearly named variable or constant.
distance += (pca[i] - collisionVertex[i]) * (pca[i] - collisionVertex[i]);
}
if (distanceMin < 0 || distance < distanceMin) {
Expand All @@ -588,7 +602,7 @@
std::array<float, 3> collisionVertex = getCollisionVertex(collisions, he3Hadcand.collisionID);

he3Hadcand.momHe3 = std::array{trackHe3.px(), trackHe3.py(), trackHe3.pz()};
for (int i = 0; i < 3; i++)

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[magic-number] 

Avoid magic numbers in expressions. Assign the value to a clearly named variable or constant.
he3Hadcand.momHe3[i] = he3Hadcand.momHe3[i] * 2;
he3Hadcand.momHad = std::array{trackHad.px(), trackHad.py(), trackHad.pz()};
float invMass = CommonInite;
Expand All @@ -608,6 +622,9 @@
return false;
}

if (he3Hadcand.recoPtHad() < settingCutPtMinHad || he3Hadcand.recoPtHad() > settingCutPtMaxHad)
return false;

he3Hadcand.signHe3 = trackHe3.sign();
he3Hadcand.signHad = trackHad.sign();
if (!settingEnableDCAfitter) {
Expand Down Expand Up @@ -676,6 +693,7 @@
beta = std::min(1.f - 1.e-6f, std::max(1.e-4f, beta)); /// sometimes beta > 1 or < 0, to be checked
he3Hadcand.massTOFHad = trackHad.tpcInnerParam() * std::sqrt(1.f / (beta * beta) - 1.f);
}
he3Hadcand.kstarfem = o2::analysis::femtoWorld::FemtoWorldMath::getkstar(trackHad, o2::constants::physics::MassPiPlus, trackHe3, o2::constants::physics::MassHelium3);

return true;
}
Expand Down Expand Up @@ -839,6 +857,80 @@
}

// ==================================================================================================================
double computePrTPCnsig(double InnerParamTPCHad, double SignalTPCHad)
{
double m_BBparamsProton[6] = {-54.42066571222577, 0.2857381250239097, 1.247140602468868, 0.6297483918147729, 2.985438833884555, 0.09};

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[name/function-variable] 

Use lowerCamelCase for names of functions and variables.

float TPCinnerParam = InnerParamTPCHad;
float expTPCSignal = o2::tpc::BetheBlochAleph((TPCinnerParam / 0.9382721), m_BBparamsProton[0], m_BBparamsProton[1], m_BBparamsProton[2], m_BBparamsProton[3], m_BBparamsProton[4]);

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[pdg/explicit-mass] 

Avoid hard-coded particle masses. Use o2::constants::physics::Mass... instead.
double resoTPC{expTPCSignal * m_BBparamsProton[5]};
return ((SignalTPCHad - expTPCSignal) / resoTPC);
}

double tofNSigmaCalculation(double MassTOFHad, double ptHad)
{
double fExpTOFMassHad = 0.9487; // Proton mass in TOF
const float kp0 = 1.22204e-02;
const float kp1 = 7.48467e-01;

double fSigmaTOFMassHad = (kp0 * TMath::Exp(kp1 * TMath::Abs(ptHad))) * fExpTOFMassHad;

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[root/entity] 

Replace ROOT entities with equivalents from standard C++ or from O2.
double fNSigmaTOFHad = (MassTOFHad - fExpTOFMassHad) / fSigmaTOFMassHad;
return fNSigmaTOFHad;
}

static float computeKstar(const He3HadCandidate& he3Hadcand)
{
const float massHe = o2::constants::physics::MassHelium3;
const float massHad = o2::constants::physics::MassPiPlus;

const ROOT::Math::PtEtaPhiMVector He(std::abs(he3Hadcand.recoPtHe3()), he3Hadcand.recoEtaHe3(), he3Hadcand.recoPhiHe3(), massHe);
const ROOT::Math::PtEtaPhiMVector Had(std::abs(he3Hadcand.recoPtHad()), he3Hadcand.recoEtaHad(), he3Hadcand.recoPhiHad(), massHad);
const ROOT::Math::PtEtaPhiMVector trackSum = He + Had;

const float beta = trackSum.Beta();
const float betax = beta * std::cos(trackSum.Phi()) * std::sin(trackSum.Theta());
const float betay = beta * std::sin(trackSum.Phi()) * std::sin(trackSum.Theta());
const float betaz = beta * std::cos(trackSum.Theta());

ROOT::Math::PxPyPzMVector HeCMS(He);
ROOT::Math::PxPyPzMVector HadCMS(Had);

const ROOT::Math::Boost boostPRF = ROOT::Math::Boost(-betax, -betay, -betaz);
HeCMS = boostPRF(HeCMS);
HadCMS = boostPRF(HadCMS);

const ROOT::Math::PxPyPzMVector RelKstar = HeCMS - HadCMS;
return 0.5 * RelKstar.P();
}

void fillKstar(const He3HadCandidate& he3Hadcand)
{
double PrTPCnsigma = computePrTPCnsig(he3Hadcand.momHadTPC, he3Hadcand.tpcSignalHad);
double PrTOFnsigma = tofNSigmaCalculation(he3Hadcand.massTOFHad, he3Hadcand.recoPtHad());
if (abs(PrTPCnsigma) < 3)

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[std-prefix] 

Use std:: prefix for names from the std namespace.
return;
if (abs(PrTOFnsigma) < 3)

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[std-prefix] 

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return;

float kstar = computeKstar(he3Hadcand);
if (he3Hadcand.isBkgUS == 0) {
if (he3Hadcand.recoPtHe3() > 0) {
mQaRegistry.fill(HIST("hKstarLSmatter"), kstar);
mQaRegistry.fill(HIST("hKstarLSmatter_femto"), he3Hadcand.kstarfem);
} else {
mQaRegistry.fill(HIST("hKstarLSantimatter"), kstar);
mQaRegistry.fill(HIST("hKstarLSantimatter_femto"), he3Hadcand.kstarfem);
}
} else {
if (he3Hadcand.recoPtHe3() > 0) {
mQaRegistry.fill(HIST("hKstarUSmatter"), kstar);
mQaRegistry.fill(HIST("hKstarUSmatter_femto"), he3Hadcand.kstarfem);
} else {
mQaRegistry.fill(HIST("hKstarUSantimatter"), kstar);
mQaRegistry.fill(HIST("hKstarUSantimatter_femto"), he3Hadcand.kstarfem);
}
}
}

template <typename Tcollisions, typename Ttracks>
void fillPairs(const Tcollisions& collisions, const Ttracks& tracks, const bool isMixedEvent)
Expand All @@ -853,6 +945,7 @@
if (!fillCandidateInfo(heTrack, hadTrack, collBracket, collisions, he3Hadcand, tracks, isMixedEvent)) {
continue;
}
fillKstar(he3Hadcand);
fillHistograms(he3Hadcand);
auto collision = collisions.rawIteratorAt(he3Hadcand.collisionID);
fillTable(he3Hadcand, collision, /*isMC*/ false);
Expand Down
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