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[PWGHF] taskCharmPolarisation: Stop using the iterator at collisions for PbPb collision process #11946

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Merged
fgrosa merged 2 commits into from
Jul 7, 2025
Merged

[PWGHF] taskCharmPolarisation: Stop using the iterator at collisions for PbPb collision process #11946

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e74de17
Fix the slice bug
Mingze129 Jul 7, 2025
e956708
Use Coll instead CollsWithQVec
Mingze129 Jul 7, 2025
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75 changes: 40 additions & 35 deletions PWGHF/D2H/Tasks/taskCharmPolarisation.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -1474,7 +1474,8 @@ struct HfTaskCharmPolarisation {

/// Get the Q vector
/// \param collision is the collision with the Q vector information
std::vector<float> getQVec(CollsWithQVecs::iterator const& collision)
template <typename Coll>
std::vector<float> getQVec(Coll const& collision)
{
float xQVec = -999.;
float yQVec = -999.;
Expand Down Expand Up @@ -2303,59 +2304,63 @@ struct HfTaskCharmPolarisation {
}
PROCESS_SWITCH(HfTaskCharmPolarisation, processDstarMcWithMl, "Process Dstar candidates in MC with ML", false);

void processDstarInPbPb(CollsWithQVecs::iterator const& collision,
void processDstarInPbPb(CollsWithQVecs const& collisions,
FilteredCandDstarWSelFlag const& dstarCandidates,
TracksWithExtra const& tracks)
{
float centrality = {-1.f};
centrality = o2::hf_centrality::getCentralityColl(collision, centEstimator);
if (centrality < centralityMin || centrality > centralityMax) {
return; // skip this collision if outside of the centrality range
}
registry.fill(HIST("hCentrality"), centrality);
for (const auto& collision : collisions) {
float centrality = {-1.f};
centrality = o2::hf_centrality::getCentralityColl(collision, centEstimator);
if (centrality < centralityMin || centrality > centralityMax) {
return; // skip this collision if outside of the centrality range
}
registry.fill(HIST("hCentrality"), centrality);

auto thisCollId = collision.globalIndex();
int numPvContributors = collision.numContrib();
auto groupedDstarCandidates = dstarCandidates.sliceBy(dstarPerCollision, thisCollId);
int nCands{0}, nCandsInSignalRegion{0};
auto thisCollId = collision.globalIndex();
int numPvContributors = collision.numContrib();
auto groupedDstarCandidates = dstarCandidates.sliceBy(dstarPerCollision, thisCollId);
int nCands{0}, nCandsInSignalRegion{0};

std::vector<float> qVecs = getQVec(collision);
std::vector<float> qVecs = getQVec(collision);

for (const auto& dstarCandidate : groupedDstarCandidates) {
nCands++;
if (runPolarisationAnalysis<charm_polarisation::DecayChannel::DstarToDzeroPi, false, false, false, true>(dstarCandidate, 0, numPvContributors, -1 /*MC particles*/, tracks, &qVecs)) {
nCandsInSignalRegion++;
for (const auto& dstarCandidate : groupedDstarCandidates) {
nCands++;
if (runPolarisationAnalysis<charm_polarisation::DecayChannel::DstarToDzeroPi, false, false, false, true>(dstarCandidate, 0, numPvContributors, -1 /*MC particles*/, tracks, &qVecs)) {
nCandsInSignalRegion++;
}
}
fillMultHistos(numPvContributors, nCands, nCandsInSignalRegion);
}
fillMultHistos(numPvContributors, nCands, nCandsInSignalRegion);
}
PROCESS_SWITCH(HfTaskCharmPolarisation, processDstarInPbPb, "Process Dstar candidates in PbPb collisions", false);

void processDstarWithMlInPbPb(CollsWithQVecs::iterator const& collision,
void processDstarWithMlInPbPb(CollsWithQVecs const& collisions,
FilteredCandDstarWSelFlagAndMl const& dstarCandidates,
TracksWithExtra const& tracks)
{
float centrality = {-1.f};
centrality = o2::hf_centrality::getCentralityColl(collision, centEstimator);
if (centrality < centralityMin || centrality > centralityMax) {
return; // skip this collision if outside of the centrality range
}
registry.fill(HIST("hCentrality"), centrality);
for (const auto& collision : collisions) {
float centrality = {-1.f};
centrality = o2::hf_centrality::getCentralityColl(collision, centEstimator);
if (centrality < centralityMin || centrality > centralityMax) {
return; // skip this collision if outside of the centrality range
}
registry.fill(HIST("hCentrality"), centrality);

auto thisCollId = collision.globalIndex();
int numPvContributors = collision.numContrib();
auto groupedDstarCandidates = dstarCandidates.sliceBy(dstarWithMlPerCollision, thisCollId);
int nCands{0}, nCandsInSignalRegion{0};
auto thisCollId = collision.globalIndex();
int numPvContributors = collision.numContrib();
auto groupedDstarCandidates = dstarCandidates.sliceBy(dstarWithMlPerCollision, thisCollId);
int nCands{0}, nCandsInSignalRegion{0};

std::vector<float> qVecs = getQVec(collision);
std::vector<float> qVecs = getQVec(collision);

for (const auto& dstarCandidate : groupedDstarCandidates) {
nCands++;
if (runPolarisationAnalysis<charm_polarisation::DecayChannel::DstarToDzeroPi, true, false, false, true>(dstarCandidate, 0, numPvContributors, -1 /*MC particles*/, tracks, &qVecs)) {
nCandsInSignalRegion++;
for (const auto& dstarCandidate : groupedDstarCandidates) {
nCands++;
if (runPolarisationAnalysis<charm_polarisation::DecayChannel::DstarToDzeroPi, true, false, false, true>(dstarCandidate, 0, numPvContributors, -1 /*MC particles*/, tracks, &qVecs)) {
nCandsInSignalRegion++;
}
}
fillMultHistos(numPvContributors, nCands, nCandsInSignalRegion);
}
fillMultHistos(numPvContributors, nCands, nCandsInSignalRegion);
}
PROCESS_SWITCH(HfTaskCharmPolarisation, processDstarWithMlInPbPb, "Process Dstar candidates with ML in PbPb collisions", false);

Expand Down
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