Skip to content

[PWGHF] implement event-mixing approach for 3 prong creator and cd task #17926

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Draft
zhangbiao-phy wants to merge 5 commits into
base: master
Choose a base branch
from
+287 −3
Draft

[PWGHF] implement event-mixing approach for 3 prong creator and cd task #17926

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
5 commits
Select commit Hold shift + click to select a range
37a9123
Implement candidate mixing configuration and processing
zhangbiao-phy Sep 15, 2026
014c9b0
Implement mixed-event configuration and handling
zhangbiao-phy Sep 15, 2026
351fab3
Please consider the following formatting changes
alibuild Sep 15, 2026
87adc80
Merge pull request #84 from alibuild/alibot-cleanup-17926
zhangbiao-phy Sep 16, 2026
f68f413
Add default initializers to HfMixed3ProngSeed
zhangbiao-phy Sep 16, 2026
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
56 changes: 56 additions & 0 deletions PWGHF/D2H/Tasks/taskCd.cxx
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -257,6 +257,12 @@ struct HfTaskCd {
using CollisionsWithEvSelFT0M = soa::Join<aod::Collisions, aod::EvSels, aod::PVMults, aod::CentFT0Ms>;
using CollisionsMcWithEvSelFT0M = soa::Join<aod::Collisions, aod::McCollisionLabels, aod::EvSels, aod::PVMults, aod::CentFT0Ms>;

struct : ConfigurableGroup {
std::string prefix = "mixing";
Configurable<bool> enabled{"enabled", false, "Analyze mixed-event input in a separate run"};
Configurable<int> type{"type", 0, "QA label matching builder mixing.type: 0 d, 1 K, 2 pion"};
} mixing;

using CdCandidates = soa::Filtered<soa::Join<aod::HfCand3Prong, aod::HfSelCd, aod::HfCand3ProngWPidPiKaDe>>;
using CdCandidatesMc = soa::Filtered<soa::Join<aod::HfCand3Prong, aod::HfSelCd, aod::HfCand3ProngWPidPiKaDe, aod::HfCand3ProngMcRec>>;
using McParticles3ProngMatched = soa::Join<aod::McParticles, aod::HfCand3ProngMcGen>;
Expand Down Expand Up @@ -327,6 +333,30 @@ struct HfTaskCd {
}
const bool isData = doprocessDataStd || doprocessDataStdWithFT0C || doprocessDataStdWithFT0M;

if (mixing.enabled) {
constexpr int LastMixingType{2};
if (!isData || mixing.type < 0 || mixing.type > LastMixingType) {
LOGP(fatal, "Mixed-event taskCd requires a data process and a valid mixing.type.");
}
registry.add("Mixed/hMassVsPtVsType", "Mixed candidates after selector;M(dK#pi);p_{T};mixing type", HistType::kTH3F,
{{400, 2.4, 4.4}, {binsPt, "p_{T}"}, {3, -0.5, 2.5}});
}
if (isData && (fillCandLiteTree || fillCandFullTree)) {
registry.add("Data/hTreeCutFlow", "Cumulative write preselection per mass hypothesis;Stage;Hypothesis", HistType::kTH2D, {{4, -0.5, 3.5}, {2, -0.5, 1.5}});
registry.add("Data/hDeuteronTofStatus", "TOF status before write preselection;Status;Hypothesis", HistType::kTH2D, {{5, -0.5, 4.5}, {2, -0.5, 1.5}});
const std::array<std::string, 4> cutLabels{"Before tree cuts", "After TOF (or disabled)", "After minimum d DCA", "After DCA ordering (or disabled)"};
const std::array<std::string, 5> tofLabels{"No TOF match", "Nonfinite nSigma", "Missing nSigma sentinel", "Finite nSigma within cut", "Finite nSigma outside cut"};
for (size_t i = 0; i < cutLabels.size(); ++i) {
registry.get<TH2>(HIST("Data/hTreeCutFlow"))->GetXaxis()->SetBinLabel(i + 1, cutLabels[i].c_str());
}
for (size_t i = 0; i < tofLabels.size(); ++i) {
registry.get<TH2>(HIST("Data/hDeuteronTofStatus"))->GetXaxis()->SetBinLabel(i + 1, tofLabels[i].c_str());
}
for (const auto& histogram : {registry.get<TH2>(HIST("Data/hTreeCutFlow")), registry.get<TH2>(HIST("Data/hDeuteronTofStatus"))}) {
histogram->GetYaxis()->SetBinLabel(1, "DeKPi");
histogram->GetYaxis()->SetBinLabel(2, "PiKDe");
}
}
auto addHistogramsRec = [&](const std::string& histoName, const std::string& xAxisTitle, const std::string& yAxisTitle, const HistogramConfigSpec& configSpec) {
if (!isData) {
registry.add(("MC/reconstructed/signal/" + histoName + "RecSig").c_str(), ("3-prong candidates (matched);" + xAxisTitle + ";" + yAxisTitle).c_str(), configSpec);
Expand Down Expand Up @@ -768,6 +798,14 @@ struct HfTaskCd {
const auto chi2PCA = candidate.chi2PCA();
const auto cpa = candidate.cpa();
const auto cpaXY = candidate.cpaXY();
if (mixing.enabled) {
if (candidate.isSelCdToDeKPi() >= selectionFlagCd) {
registry.fill(HIST("Mixed/hMassVsPtVsType"), HfHelper::invMassCdToDeKPi(candidate), candidate.pt(), mixing.type.value);
}
if (candidate.isSelCdToPiKDe() >= selectionFlagCd) {
registry.fill(HIST("Mixed/hMassVsPtVsType"), HfHelper::invMassCdToPiKDe(candidate), candidate.pt(), mixing.type.value);
}
}
if (candidate.isSelCdToDeKPi() >= selectionFlagCd) {
registry.fill(HIST("Data/hMass"), HfHelper::invMassCdToDeKPi(candidate));
registry.fill(HIST("Data/hMassVsPtVsNPvContributors"), HfHelper::invMassCdToDeKPi(candidate), pt, numPvContributors);
Expand Down Expand Up @@ -874,16 +912,34 @@ struct HfTaskCd {
registry.fill(HIST("Data/hNsigmaTPCKaVsP"), prong1.tpcInnerParam() * prong1.sign(), nSigmaTpcKa);
registry.fill(HIST("Data/hNsigmaTOFKaVsP"), prong1.tpcInnerParam() * prong1.sign(), nSigmaTofKa);

// Diagnostic categories only: preserve the existing selection predicates below.
enum TofStatus { NoMatch,
Nonfinite,
Missing,
WithinCut,
OutsideCut };
constexpr float MissingTofNSigma{-999.f};
const int hypothesis = isDeKPi ? 0 : 1;
const int tofStatus = !deuteronProng.hasTOF() ? NoMatch : !std::isfinite(nSigmaTofDe) ? Nonfinite
: nSigmaTofDe <= MissingTofNSigma ? Missing
: std::abs(nSigmaTofDe) <= cfgMaxDeuteronTofPidPreselection ? WithinCut
: OutsideCut;
registry.fill(HIST("Data/hDeuteronTofStatus"), tofStatus, hypothesis);
registry.fill(HIST("Data/hTreeCutFlow"), 0, hypothesis);
if (cfgUseTofPidForDeuteron && std::abs(nSigmaTofDe) > cfgMaxDeuteronTofPidPreselection) {
return;
}
registry.fill(HIST("Data/hTreeCutFlow"), 1, hypothesis);
if (std::abs(dcaDeuteron) < cfgMinDeuteronDcaPreselection) {
return;
}
registry.fill(HIST("Data/hTreeCutFlow"), 2, hypothesis);
if (cfgCutOnDeuteronDcaOrdering && (std::abs(dcaDeuteron) > std::abs(dcaKaon) || std::abs(dcaDeuteron) > std::abs(dcaPion))) {
return;
}

registry.fill(HIST("Data/hTreeCutFlow"), 3, hypothesis);

if (fillCandLiteTree) {
rowCandCdLite(
invMassCd, invMassLc, pt, eta, phi, ptProng0, ptProng1, ptProng2,
Expand Down
Loading
Loading