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[PWGLF] UPC timing QA/cuts in derived UPC analysis and clean up cascade QA/postprocessing in pp #15585

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Merged
lhusova merged 3 commits into from
Mar 30, 2026
+280 −90
Merged

[PWGLF] UPC timing QA/cuts in derived UPC analysis and clean up cascade QA/postprocessing in pp #15585

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3c42af7
PWGLF: extend UPC timing QA and cuts
nepeivodaRS Mar 30, 2026
23b310e
PWGLF: update cascade analysis
nepeivodaRS Mar 30, 2026
2697ac5
PWGLF: fix cpplint issues
nepeivodaRS Mar 30, 2026
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128 changes: 57 additions & 71 deletions PWGLF/TableProducer/Strangeness/cascqaanalysis.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -34,7 +34,9 @@
#include <TPDGCode.h>

#include <algorithm>
#include <cmath>
#include <string>
#include <utility>
#include <vector>

using namespace o2;
Expand Down Expand Up @@ -122,14 +124,49 @@ struct Cascqaanalysis {
SliceCache cache;

// Random number generator for event scaling
TRandom2* fRand = new TRandom2();
TRandom2 fRand;

// Struct to select on event type
typedef struct CollisionIndexAndType {
int64_t index;
uint8_t typeFlag;
} CollisionIndexAndType;

template <typename TTrack>
static int countITSHits(TTrack const& track)
{
int nHits = 0;
for (unsigned int i = 0; i < 7; ++i) {
if (track.itsClusterMap() & (1 << i)) {
++nHits;
}
}
return nHits;
}

template <typename TCollision>
static uint8_t buildRecoEventFlags(TCollision const& collision)
{
uint8_t evFlag = o2::aod::mycascades::EvFlags::EvINEL;
if (collision.isInelGt0()) {
evFlag |= o2::aod::mycascades::EvFlags::EvINELgt0;
}
if (collision.isInelGt1()) {
evFlag |= o2::aod::mycascades::EvFlags::EvINELgt1;
}
return evFlag;
}

template <typename TCascade, typename TCollision>
static std::pair<float, float> computeCascadeCtau(TCascade const& casc, TCollision const& collision)
{
const float decayLength = std::hypot(casc.x() - collision.posX(), casc.y() - collision.posY(), casc.z() - collision.posZ());
const float totalMomentum = std::hypot(casc.px(), casc.py(), casc.pz());
const float invMomentum = 1.f / (totalMomentum + 1.e-13f);
return {o2::constants::physics::MassXiMinus * decayLength * invMomentum,
o2::constants::physics::MassOmegaMinus * decayLength * invMomentum};
}

void init(InitContext const&)
{
TString hCandidateCounterLabels[4] = {"All candidates", "passed topo cuts", "has associated MC particle", "associated with Xi(Omega)"};
Expand Down Expand Up @@ -210,17 +247,13 @@ struct Cascqaanalysis {
auto bachelor = cascCand.template bachelor_as<TCascTracksTo>();

// Basic set of selections
if (cascCand.cascradius() > cascradius &&
cascCand.v0radius() > v0radius &&
cascCand.casccosPA(pvx, pvy, pvz) > casccospa &&
cascCand.v0cosPA(pvx, pvy, pvz) > v0cospa &&
std::fabs(posdau.eta()) < etadau &&
std::fabs(negdau.eta()) < etadau &&
std::fabs(bachelor.eta()) < etadau) {
return true;
} else {
return false;
}
return cascCand.cascradius() > cascradius &&
cascCand.v0radius() > v0radius &&
cascCand.casccosPA(pvx, pvy, pvz) > casccospa &&
cascCand.v0cosPA(pvx, pvy, pvz) > v0cospa &&
std::fabs(posdau.eta()) < etadau &&
std::fabs(negdau.eta()) < etadau &&
std::fabs(bachelor.eta()) < etadau;
}

template <typename TMcParticles>
Expand Down Expand Up @@ -419,39 +452,16 @@ struct Cascqaanalysis {
registry.fill(HIST("hCandidateCounter"), 1.5); // passed topo cuts
nCandSel++;
// Fill table
if (fRand->Rndm() < lEventScale) {
if (fRand.Rndm() < lEventScale) {
auto posdau = casc.posTrack_as<DauTracks>();
auto negdau = casc.negTrack_as<DauTracks>();
auto bachelor = casc.bachelor_as<DauTracks>();

// ITS N hits
int posITSNhits = 0, negITSNhits = 0, bachITSNhits = 0;
for (unsigned int i = 0; i < 7; i++) {
if (posdau.itsClusterMap() & (1 << i)) {
posITSNhits++;
}
if (negdau.itsClusterMap() & (1 << i)) {
negITSNhits++;
}
if (bachelor.itsClusterMap() & (1 << i)) {
bachITSNhits++;
}
}

uint8_t evFlag = 0;
evFlag |= o2::aod::mycascades::EvFlags::EvINEL;
if (collision.multNTracksPVeta1() > 0) {
evFlag |= o2::aod::mycascades::EvFlags::EvINELgt0;
}
if (collision.multNTracksPVeta1() > 1) {
evFlag |= o2::aod::mycascades::EvFlags::EvINELgt1;
}

// c x tau
float cascpos = std::hypot(casc.x() - collision.posX(), casc.y() - collision.posY(), casc.z() - collision.posZ());
float cascptotmom = std::hypot(casc.px(), casc.py(), casc.pz());
float ctauXi = o2::constants::physics::MassXiMinus * cascpos / (cascptotmom + 1e-13);
float ctauOmega = o2::constants::physics::MassOmegaMinus * cascpos / (cascptotmom + 1e-13);
const int posITSNhits = countITSHits(posdau);
const int negITSNhits = countITSHits(negdau);
const int bachITSNhits = countITSHits(bachelor);
const uint8_t evFlag = buildRecoEventFlags(collision);
const auto [ctauXi, ctauOmega] = computeCascadeCtau(casc, collision);

mycascades(collision.posZ(),
collision.centFT0M(), collision.centFV0A(),
Expand Down Expand Up @@ -563,41 +573,17 @@ struct Cascqaanalysis {
genY = cascmc.y();
}
}
if (fRand->Rndm() < lEventScale) {
if (fRand.Rndm() < lEventScale) {
// Fill table
auto posdau = casc.posTrack_as<DauTracks>();
auto negdau = casc.negTrack_as<DauTracks>();
auto bachelor = casc.bachelor_as<DauTracks>();

// ITS N hits
int posITSNhits = 0, negITSNhits = 0, bachITSNhits = 0;
for (unsigned int i = 0; i < 7; i++) {
if (posdau.itsClusterMap() & (1 << i)) {
posITSNhits++;
}
if (negdau.itsClusterMap() & (1 << i)) {
negITSNhits++;
}
if (bachelor.itsClusterMap() & (1 << i)) {
bachITSNhits++;
}
}

// Event type flag
uint8_t evFlag = 0;
evFlag |= o2::aod::mycascades::EvFlags::EvINEL;
if (collision.multNTracksPVeta1() > 0) {
evFlag |= o2::aod::mycascades::EvFlags::EvINELgt0;
}
if (collision.multNTracksPVeta1() > 1) {
evFlag |= o2::aod::mycascades::EvFlags::EvINELgt1;
}

// c x tau
float cascpos = std::hypot(casc.x() - collision.posX(), casc.y() - collision.posY(), casc.z() - collision.posZ());
float cascptotmom = std::hypot(casc.px(), casc.py(), casc.pz());
float ctauXi = o2::constants::physics::MassXiMinus * cascpos / (cascptotmom + 1e-13);
float ctauOmega = o2::constants::physics::MassOmegaMinus * cascpos / (cascptotmom + 1e-13);
const int posITSNhits = countITSHits(posdau);
const int negITSNhits = countITSHits(negdau);
const int bachITSNhits = countITSHits(bachelor);
const uint8_t evFlag = buildRecoEventFlags(collision);
const auto [ctauXi, ctauOmega] = computeCascadeCtau(casc, collision);

mycascades(collision.posZ(),
mcCollision.centFT0M(), 0, // mcCollision.centFV0A() to be added
Expand Down
2 changes: 2 additions & 0 deletions PWGLF/Tasks/Strangeness/cascpostprocessing.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -243,6 +243,8 @@ struct cascpostprocessing {
bool isCorrectlyRec = 0;

for (auto& candidate : mycascades) {
isCandidate = false;
isCorrectlyRec = false;

switch (evSelFlag) {
case 1: {
Expand Down
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