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[PWGUD] MUON efficiency producer: add simple luminosity counters #18652

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Merged
ekryshen merged 1 commit into from
Nov 8, 2026
Merged

[PWGUD] MUON efficiency producer: add simple luminosity counters #18652

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81 changes: 75 additions & 6 deletions PWGUD/TableProducer/muonEfficiencyProducer.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -13,8 +13,13 @@
/// \brief Compact forward-muon skim for offline MCH and MCH-MID efficiency studies
/// \author Nazar Burmasov (JINR)

#include "Common/CCDB/EventSelectionParams.h"

#include <CCDB/BasicCCDBManager.h>
#include <CommonConstants/LHCConstants.h>
#include <DataFormatsFT0/Digit.h>
#include <DataFormatsParameters/AggregatedRunInfo.h>
#include <DataFormatsParameters/GRPLHCIFData.h>
#include <DataFormatsParameters/GRPMagField.h>
#include <DetectorsBase/GeometryManager.h>
#include <DetectorsBase/Propagator.h>
Expand All @@ -24,8 +29,11 @@
#include <Framework/AnalysisTask.h>
#include <Framework/Configurable.h>
#include <Framework/DataTypes.h>
#include <Framework/HistogramRegistry.h>
#include <Framework/HistogramSpec.h>
#include <Framework/InitContext.h>
#include <Framework/Logger.h>
#include <Framework/OutputObjHeader.h>
#include <Framework/runDataProcessing.h>
#include <GlobalTracking/MatchGlobalFwd.h>
#include <MCHTracking/TrackExtrap.h>
Expand All @@ -34,9 +42,13 @@
#include <Math/MatrixRepresentationsStatic.h>
#include <Math/SMatrix.h>
#include <TGeoManager.h>
#include <TH1.h>
#include <TH2.h>

#include <array>
#include <bitset>
#include <cstdint>
#include <string>
#include <vector>

using namespace o2;
Expand Down Expand Up @@ -98,16 +110,21 @@ struct MuonEfficiencyProducer {
static constexpr float MaxEta = -2.5f;
static constexpr float NoAmplitude = -1.f;
static constexpr float MaxFITTime = 30.f;
static constexpr int BCsPerOrbit = constants::lhc::LHCMaxBunches;

using Tracks = soa::Join<aod::FwdTracks, aod::FwdTracksCov>;
using Matrix55 = ROOT::Math::SMatrix<double, 5, 5, ROOT::Math::MatRepSym<double, 5>>;
using Vector5 = ROOT::Math::SVector<double, 5>;

Produces<aod::MchEffBCs> outputBCs;
Produces<aod::MchEffSkims> output;
HistogramRegistry histos{"Histos", {}, OutputObjHandlingPolicy::AnalysisObject};
Service<ccdb::BasicCCDBManager> ccdb{};
globaltracking::MatchGlobalFwd matcher;
int cachedFieldRun = -1;
bool conditionsInitialized = false;
std::bitset<BCsPerOrbit> collidingBCs;
float zncBBLower = 0.f;
float zncBBUpper = 0.f;

Configurable<float> minPt{"minPt", 0.4f, "Minimum track pT (Gev/c)"};
Configurable<float> minRAbs{"minRAbs", 17.6f, "Minimum absorber-end radius (cm)"};
Expand All @@ -118,11 +135,19 @@ struct MuonEfficiencyProducer {
void init(InitContext&)
{
ccdb->setLocalObjectValidityChecking();
const AxisSpec runAxis{1, 0.5, 1.5, "Run"};
const AxisSpec bcAxis{BCsPerOrbit, -0.5, BCsPerOrbit - 0.5, "BC in orbit"};
histos.add("hCounterTVX", "TVX;Run;BC in orbit;Counts", HistType::kTH2D, {runAxis, bcAxis});
histos.add("hCounterTCE", "TCE;Run;BC in orbit;Counts", HistType::kTH2D, {runAxis, bcAxis});
histos.add("hCounterZNC", "ZNC;Run;BC in orbit;Counts", HistType::kTH2D, {runAxis, bcAxis});
histos.get<TH2>(HIST("hCounterTVX"))->SetCanExtend(TH1::kXaxis);
histos.get<TH2>(HIST("hCounterTCE"))->SetCanExtend(TH1::kXaxis);
histos.get<TH2>(HIST("hCounterZNC"))->SetCanExtend(TH1::kXaxis);
}

void setField(int run)
void initRunConditions(int run)
{
if (cachedFieldRun == run) {
if (conditionsInitialized) {
return;
}
const auto runInfo = parameters::AggregatedRunInfo::buildAggregatedRunInfo(ccdb->instance(), run);
Expand All @@ -136,7 +161,21 @@ struct MuonEfficiencyProducer {
ccdb->get<TGeoManager>("GLO/Config/GeometryAligned");
}
mch::TrackExtrap::setField();
cachedFieldRun = run;
if (!runInfo.grpLHC) {
LOGF(fatal, "GRPLHCIFData not found for run %d", run);
}
collidingBCs = runInfo.grpLHC->getBunchFilling().getBCPattern();
auto* params = ccdb->getForTimeStamp<EventSelectionParams>("EventSelection/EventSelectionParams", ts);
if (!params) {
LOGF(fatal, "EventSelectionParams not found for run %d", run);
}
zncBBLower = params->fZNCBBlower;
zncBBUpper = params->fZNCBBupper;
const auto label = std::to_string(run);
histos.get<TH2>(HIST("hCounterTVX"))->GetXaxis()->SetBinLabel(1, label.c_str());
histos.get<TH2>(HIST("hCounterTCE"))->GetXaxis()->SetBinLabel(1, label.c_str());
histos.get<TH2>(HIST("hCounterZNC"))->GetXaxis()->SetBinLabel(1, label.c_str());
conditionsInitialized = true;
}

struct Kinematics {
Expand Down Expand Up @@ -165,19 +204,23 @@ struct MuonEfficiencyProducer {
}

void process(aod::BCs const& bcs, aod::FT0s const& ft0s, aod::FV0As const& fv0as,
aod::Zdcs const& zdcs,
Tracks const& tracks, aod::Collisions const& collisions,
aod::AmbiguousFwdTracks const& ambiguous)
{
if (bcs.size() == 0) {
return;
}
const int run = bcs.begin().runNumber();

initRunConditions(run);
std::vector<uint8_t> ft0TriggersByBC(bcs.size(), 0);
std::vector<uint8_t> zncIsBBByBC(bcs.size(), 0);
std::vector<float> ft0aByBC(bcs.size(), NoAmplitude);
std::vector<float> ft0cByBC(bcs.size(), NoAmplitude);
std::vector<float> fv0aByBC(bcs.size(), NoAmplitude);
std::vector<int32_t> skimBCIds(bcs.size(), -1);
for (const auto& ft0 : ft0s) {
ft0TriggersByBC[ft0.bcId()] |= ft0.triggerMask();
if (ft0.timeA() < MaxFITTime) {
ft0aByBC[ft0.bcId()] = ft0.sumAmpA();
}
Expand All @@ -198,6 +241,33 @@ struct MuonEfficiencyProducer {
fv0aByBC[fv0.bcId()] = amplitude;
}

for (const auto& zdc : zdcs) {
if (zdc.timeZNC() > zncBBLower && zdc.timeZNC() < zncBBUpper) {
zncIsBBByBC[zdc.bcId()] = 1;
}
}

auto hTVX = histos.get<TH2>(HIST("hCounterTVX"));
auto hTCE = histos.get<TH2>(HIST("hCounterTCE"));
auto hZNC = histos.get<TH2>(HIST("hCounterZNC"));
for (const auto& bc : bcs) {
const auto slot = bc.globalBC() % BCsPerOrbit;
if (!collidingBCs[slot]) {
continue;
}
const auto mask = ft0TriggersByBC[bc.globalIndex()];
const bool tvx = (mask & (1u << o2::ft0::Triggers::bitVertex)) != 0;
if (tvx) {
hTVX->Fill(1., static_cast<double>(slot));
if ((mask & (1u << o2::ft0::Triggers::bitCen)) != 0) {
hTCE->Fill(1., static_cast<double>(slot));
}
}
if (zncIsBBByBC[bc.globalIndex()] != 0u) {
hZNC->Fill(1., static_cast<double>(slot));
}
}

std::vector<int32_t> ambiguousBCIds(tracks.size(), -1);
for (const auto& entry : ambiguous) {
const auto& ids = entry.bcIds();
Expand Down Expand Up @@ -226,7 +296,6 @@ struct MuonEfficiencyProducer {
vtxCov = {col.covXX(), col.covYY()};
referenceBCId = col.bcId();
}
setField(run);
if (!propagateMCH(t, vtx, vtxCov, k)) {
continue;
}
Expand Down
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