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[PWGLF] Added QA plots for phi #18248

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Merged
dmallick2 merged 1 commit into from
Oct 12, 2026
Merged

[PWGLF] Added QA plots for phi #18248

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16 changes: 16 additions & 0 deletions PWGLF/Tasks/Resonances/kstarqa.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -375,6 +375,10 @@ struct Kstarqa {
hShift.add("h2D_dpy_vs_py_Phi", "Pion from Phi: dpy vs py", kTH2F, {{subAxis}, {ptAxis}});
hShift.add("h2D_dpz_vs_pz_Phi", "Pion from Phi: dpz vs pz", kTH2F, {{subAxis}, {ptAxis}});
hShift.add("h2D_dpt_vs_pt_Phi", "Pion from Phi: dpt vs pt", kTH2F, {{subAxis}, {ptAxis}});

hShift.add("h1D_MassPhiGen", "Invariant mass of generated Phi meson", kTH1F, {{300, 1.0, 1.06}});
hShift.add("h1D_MassPhiRec", "Invariant mass of reconstructed Phi meson", kTH1F, {{300, 1.0, 1.06}});
hShift.add("h2D_pt_massShiftPhi", "pT vs mass shift of Phi meson", kTH2F, {{ptAxis}, {300, -0.1, 0.1}});
}

// Signal Loss & Event Loss in Light Ion Collisions
Expand Down Expand Up @@ -3192,7 +3196,19 @@ struct Kstarqa {
if (track1.sign() * track2.sign() < 0) {
daughter1 = ROOT::Math::PxPyPzMVector(track1.px(), track1.py(), track1.pz(), massKa);
daughter2 = ROOT::Math::PxPyPzMVector(track2.px(), track2.py(), track2.pz(), massKa);

genDaughter1 = ROOT::Math::PxPyPzMVector(mctrack1.px(), mctrack1.py(), mctrack1.pz(), massKa);
genDaughter2 = ROOT::Math::PxPyPzMVector(mctrack2.px(), mctrack2.py(), mctrack2.pz(), massKa);

mother = daughter1 + daughter2; // Phi meson
genMother = genDaughter1 + genDaughter2; // Phi meson

recMass = mother.M();
genMass = genMother.M();

hShift.fill(HIST("h1D_MassPhiGen"), genMass);
hShift.fill(HIST("h1D_MassPhiRec"), recMass);
hShift.fill(HIST("h2D_pt_massShiftPhi"), mother.pt(), genMass - recMass);

auto genpTPhi = mothertrack1.pt();
auto genEtaPhi = mothertrack1.eta();
Expand Down
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