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[ALICE3] Add Xi0 and charged Sigma to otf decayer #17184

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Merged
jesgum merged 3 commits into from
Jul 23, 2026
+20 −7
Merged

[ALICE3] Add Xi0 and charged Sigma to otf decayer #17184

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a7ef9ba
Add Xi0, Sigma+, and Sigma- to otf decayer
jesgum Jul 23, 2026
f5a222a
Add Xi0bar
jesgum Jul 23, 2026
3480fcf
indludes
jesgum Jul 23, 2026
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27 changes: 20 additions & 7 deletions ALICE3/TableProducer/OTF/onTheFlyDecayer.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -20,6 +20,7 @@
#include "ALICE3/Core/TrackUtilities.h"
#include "ALICE3/DataModel/tracksAlice3.h"

#include <CommonConstants/PhysicsConstants.h>
#include <Framework/AnalysisDataModel.h>
#include <Framework/AnalysisHelpers.h>
#include <Framework/AnalysisTask.h>
Expand Down Expand Up @@ -47,13 +48,19 @@
using namespace o2;
using namespace o2::framework;

static constexpr int NumDecays = 7;
static constexpr int NumDecays = 13;
static constexpr int NumParameters = 1;
static constexpr int DefaultParameters[NumDecays][NumParameters]{{1}, {1}, {1}, {1}, {1}, {1}, {1}};
static constexpr std::array<std::array<int, NumParameters>, NumDecays> DefaultParameters{{{1}, {1}, {1}, {1}, {1}, {1}, {1}, {1}, {1}, {1}, {1}, {1}, {1}}};
static const std::vector<std::string> parameterNames{"enable"};
static const std::vector<std::string> particleNames{"K0s",
"Lambda",
"Anti-Lambda",
"SigmaPlus",
"Anti-SigmaPlus",
"SigmaMinus",
"Anti-SigmaMinus",
"Xi0",
"Anti-Xi0",
"Xi",
"Anti-Xi",
"Omega",
Expand All @@ -62,6 +69,12 @@
static const std::vector<int> pdgCodes{PDG_t::kK0Short,
PDG_t::kLambda0,
PDG_t::kLambda0Bar,
PDG_t::kSigmaPlus,
PDG_t::kSigmaBarMinus,
PDG_t::kSigmaMinus,
PDG_t::kSigmaBarPlus,
o2::constants::physics::kXi0,
-o2::constants::physics::kXi0,
PDG_t::kXiMinus,
PDG_t::kXiPlusBar,
PDG_t::kOmegaMinus,
Expand All @@ -78,13 +91,13 @@
Produces<aod::OTFDecayerBits> tableOTFDecayerBits;

o2::upgrade::Decayer decayer;
Service<o2::framework::O2DatabasePDG> pdgDB;
Service<o2::framework::O2DatabasePDG> pdgDB{};
HistogramRegistry histos{"histos", {}, OutputObjHandlingPolicy::AnalysisObject};

Configurable<int> seed{"seed", 0, "Set seed for particle decayer"};
Configurable<float> magneticField{"magneticField", 20., "Magnetic field (kG)"};
Configurable<LabeledArray<int>> enabledDecays{"enabledDecays",
{DefaultParameters[0], NumDecays, NumParameters, particleNames, parameterNames},
{DefaultParameters[0].data(), NumDecays, NumParameters, particleNames, parameterNames},
"Enable option for particle to be decayed: 0 - no, 1 - yes"};

std::size_t indexOffset = 0;
Expand All @@ -99,7 +112,7 @@
decayer.setSeed(seed);
decayer.setBField(magneticField);
for (int i = 0; i < NumDecays; ++i) {
if (enabledDecays->get(particleNames[i].c_str(), "enable")) {
if (enabledDecays->get(particleNames[i].c_str(), "enable") != 0) {
LOG(info) << " --- Decay enabled: " << pdgCodes[i];
mEnabledDecays.push_back(pdgCodes[i]);
}
Expand Down Expand Up @@ -146,9 +159,9 @@

const float decayRadius = decayer.getDecayRadius();
const float trackVelocity = o2::upgrade::computeParticleVelocity(particle.p(), pdgDB->GetParticle(particle.pdgCode())->Mass());
const int charge = pdgDB->GetParticle(particle.pdgCode())->Charge() / 3;
const int charge = static_cast<int>(pdgDB->GetParticle(particle.pdgCode())->Charge() / 3);
float trackLength{-1.f};
if (!charge) {
if (charge == 0) {
const float dx = particle.vx() - decayer.getSecondaryVertexX();
const float dy = particle.vy() - decayer.getSecondaryVertexY();
const float dz = particle.vz() - decayer.getSecondaryVertexZ();
Expand All @@ -161,7 +174,7 @@

const float trackTimeNS = trackLength / trackVelocity * PicoToNano;
particle.setIndicesDaughter(particlesInDataframe - indexOffset + allParticles.size(), particlesInDataframe - indexOffset + allParticles.size() + (decayStack.size() - 1));
for (auto& daughter : decayStack) {

Check failure on line 177 in ALICE3/TableProducer/OTF/onTheFlyDecayer.cxx

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[const-ref-in-for-loop] 

Use constant references for non-modified iterators in range-based for loops.
daughter.setIndicesMother(particlesInDataframe - indexOffset + i, particlesInDataframe - indexOffset + i);
daughter.setCollisionId(particle.collisionId());
daughter.setBitOn(o2::upgrade::DecayerBits::ProducedByDecayer);
Expand Down Expand Up @@ -199,7 +212,7 @@
decayParticles(0, allParticles.size());

// Fill output table
for (auto& otfParticle : allParticles) {

Check failure on line 215 in ALICE3/TableProducer/OTF/onTheFlyDecayer.cxx

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[const-ref-in-for-loop] 

Use constant references for non-modified iterators in range-based for loops.
otfParticle.setIndexOffset(indexOffset);
if (otfParticle.hasNaN()) {
histos.fill(HIST("hNaNBookkeeping"), 1);
Expand Down
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