use pdg code directly

Author: BongHwi

PWGLF/Tasks/Resonances/xi1820Analysis.cxx

@@ -103,8 +103,6 @@ struct Xi1820Analysis {
 
   // Constants
   static constexpr float SmallMomentumDenominator = 1e-10f; // Small value to avoid division by zero
-  static constexpr int PdgChargedXi1820 = Pdg::kXi1820Minus;
-  static constexpr int PdgXi1820Zero = Pdg::kXi1820Zero;
   static constexpr int ExpectedDaughters = 2;               // Expected number of daughters for two-body decay
 
   // Axes
@@ -1116,7 +1114,7 @@ struct Xi1820Analysis {
               }
 
               if constexpr (IsMC) { // Calculate Acceptance x efficiency for "the particle" channel
-                if (v0.motherPDG() != -PdgChargedXi1820 || kaon.motherPDG() != v0.motherPDG()) {
+                if (v0.motherPDG() != -Pdg::kXi1820Minus || kaon.motherPDG() != v0.motherPDG()) {
                   continue;
                 }
                 if (kaon.pdgCode() != PDG_t::kKPlus || v0.pdgCode() != PDG_t::kLambda0Bar) {
@@ -1193,7 +1191,7 @@ struct Xi1820Analysis {
                 }
               }
               if constexpr (IsMC) { // Calculate Acceptance x efficiency for "the particle" channel
-                if (v0.motherPDG() != PdgChargedXi1820 || kaon.motherPDG() != v0.motherPDG()) {
+                if (v0.motherPDG() != Pdg::kXi1820Minus || kaon.motherPDG() != v0.motherPDG()) {
                   continue;
                 }
                 if (kaon.pdgCode() != PDG_t::kKMinus || v0.pdgCode() != PDG_t::kLambda0) {
@@ -1398,7 +1396,7 @@ struct Xi1820Analysis {
               }
 
               if constexpr (IsMC) { // Calculate Acceptance x efficiency
-                if (lambda.motherPDG() != PdgXi1820Zero || k0s.motherPDG() != lambda.motherPDG()) {
+                if (lambda.motherPDG() != Pdg::kXi1820Zero || k0s.motherPDG() != lambda.motherPDG()) {
                   continue;
                 }
                 if (std::abs(k0s.pdgCode()) != PDG_t::kK0Short || lambda.pdgCode() != PDG_t::kLambda0) {
@@ -1468,7 +1466,7 @@ struct Xi1820Analysis {
               }
 
               if constexpr (IsMC) { // Calculate Acceptance x efficiency
-                if (lambda.motherPDG() != -PdgXi1820Zero || k0s.motherPDG() != lambda.motherPDG()) {
+                if (lambda.motherPDG() != -Pdg::kXi1820Zero || k0s.motherPDG() != lambda.motherPDG()) {
                   continue;
                 }
                 if (std::abs(k0s.pdgCode()) != PDG_t::kK0Short || lambda.pdgCode() != PDG_t::kLambda0Bar) {
@@ -1770,7 +1768,7 @@ struct Xi1820Analysis {
     histos.fill(HIST("multQA/h2MultCentMC"), inCent, multiplicity);
     for (const auto& part : resoParents) { // loop over all pre-filtered Gen particle on selected events
       auto pdgMother = part.pdgCode();
-      if (std::abs(pdgMother) != PdgChargedXi1820 && std::abs(pdgMother) != PdgXi1820Zero) {
+      if (std::abs(pdgMother) != Pdg::kXi1820Minus && std::abs(pdgMother) != Pdg::kXi1820Zero) {
         continue;
       }
       if (!passesRapidity(part.y())) {
@@ -1780,7 +1778,7 @@ struct Xi1820Analysis {
       auto daughter1PDG = part.daughterPDG1();
       auto daughter2PDG = part.daughterPDG2();
 
-      if (std::abs(pdgMother) == PdgChargedXi1820) { // Explicity check for the safety.
+      if (std::abs(pdgMother) == Pdg::kXi1820Minus) { // Explicity check for the safety.
         // K- + Anti-Lambda,  K+ + Anti-Lambda
         if ((daughter1PDG == PDG_t::kKMinus && daughter2PDG == PDG_t::kLambda0) ||
             (daughter1PDG == PDG_t::kLambda0 && daughter2PDG == PDG_t::kKMinus)) {
@@ -1813,7 +1811,7 @@ struct Xi1820Analysis {
       int pdg = mcParticle.pdgCode();
 
       // Select only the configured charged and neutral Xi(1820) states.
-      if (std::abs(pdg) != PdgChargedXi1820 && std::abs(pdg) != PdgXi1820Zero) {
+      if (std::abs(pdg) != Pdg::kXi1820Minus && std::abs(pdg) != Pdg::kXi1820Zero) {
         continue;
       }