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[PWGEM] Add configurable for minimum Minv a photon pair has to have i… #18581

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Merged
jokonig merged 1 commit into from
Nov 4, 2026
Merged

[PWGEM] Add configurable for minimum Minv a photon pair has to have i… #18581

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24 changes: 14 additions & 10 deletions PWGEM/PhotonMeson/TableProducer/photonconversionbuilder.h
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Original file line number Diff line number Diff line change
Expand Up @@ -283,7 +283,8 @@ struct PhotonConversionBuilder {
struct : ConfigurableGroup {
std::string prefix = "skim_group";
Configurable<int> minNv0PerCollision{"minNv0PerCollision", -1, "store V0 photons only for collisions with at least this many surviving candidates (event-level skim for derived data). negative = store all"};
Configurable<float> maxMinvPairPerCollision{"maxMinvPairPerCollision", -1.f, "store a collision's photons only if at least one photon pair has qinv below this (GeV/c^2). negative = disabled"};
Configurable<float> minMinvPairPerCollision{"minMinvPairPerCollision", -1.f, "store a collision's photons only if at least one photon pair has qinv (minv) above this (GeV/c^2). negative = disabled"};
Configurable<float> maxMinvPairPerCollision{"maxMinvPairPerCollision", -1.f, "store a collision's photons only if at least one photon pair has qinv (minv) below this (GeV/c^2). negative = disabled"};
} skim;

// single track cuts
Expand Down Expand Up @@ -420,8 +421,8 @@ struct PhotonConversionBuilder {
}
LOGF(info, "photon-conversion-builder: deduplicationMode = %d (%s), score weight = %.2f",
dedup.deduplicationMode.value, DedupNames[dedup.deduplicationMode.value], dedup.deduplicationScoreWeight.value);
LOGF(info, "photon-conversion-builder: minNv0PerCollision = %d, maxMinvPairPerCollision = %f",
skim.minNv0PerCollision.value, skim.maxMinvPairPerCollision.value);
LOGF(info, "photon-conversion-builder: minNv0PerCollision = %d, minMinvPairPerCollision = %f, maxMinvPairPerCollision = %f",
skim.minNv0PerCollision.value, skim.minMinvPairPerCollision.value, skim.maxMinvPairPerCollision.value);

ccdb->setURL(ccdburl);
ccdb->setCaching(true);
Expand Down Expand Up @@ -1991,7 +1992,7 @@ struct PhotonConversionBuilder {
}

std::set<int64_t> skimRejected;
if (skim.minNv0PerCollision > 0 || skim.maxMinvPairPerCollision > 0.f) {
if (skim.minNv0PerCollision > 0 || skim.maxMinvPairPerCollision > 0.f || skim.minMinvPairPerCollision > 0.f) { // o2-linter: disable=magic-number (check if configurable is enabled)
const std::set<CandKey> storedSetSkim(stored_fullv0Ids.begin(), stored_fullv0Ids.end());
std::unordered_map<int64_t, std::vector<const V0CandidateHelper*>> candsPerColl;
for (const auto& c : vecV0Dedup) {
Expand All @@ -2004,19 +2005,22 @@ struct PhotonConversionBuilder {
skimRejected.insert(colId);
continue;
}
if (skim.maxMinvPairPerCollision > 0.f) {
bool hasLowMPair = false;
for (size_t i = 0; i < cands.size() && !hasLowMPair; ++i) {
if (skim.maxMinvPairPerCollision > 0.f || skim.minMinvPairPerCollision > 0.f) { // o2-linter: disable=magic-number (check if configurable is enabled)
bool hasPairOfInterest = false;
const float minMinv = skim.minMinvPairPerCollision > 0.f ? skim.minMinvPairPerCollision.value : 0.f;
const float maxMinv = skim.maxMinvPairPerCollision > 0.f ? skim.maxMinvPairPerCollision.value : std::numeric_limits<float>::max();
for (size_t i = 0; i < cands.size() && !hasPairOfInterest; ++i) {
for (size_t j = i + 1; j < cands.size(); ++j) {
ROOT::Math::PxPyPzMVector v1(cands[i]->pxAtPV, cands[i]->pyAtPV, cands[i]->pzAtPV, 0.f);
ROOT::Math::PxPyPzMVector v2(cands[j]->pxAtPV, cands[j]->pyAtPV, cands[j]->pzAtPV, 0.f);
if ((v1 + v2).M() < skim.maxMinvPairPerCollision) {
hasLowMPair = true;
const double massPair = (v1 + v2).M();
if (massPair > minMinv && massPair < maxMinv) {
hasPairOfInterest = true;
break;
}
}
}
if (!hasLowMPair) {
if (!hasPairOfInterest) {
skimRejected.insert(colId);
}
}
Expand Down
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