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[PWGEM,Photon] Add new QA histogram to monitor cluster angle dsitribu… #17834

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mhemmer-cern merged 1 commit into from
Sep 8, 2026
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[PWGEM,Photon] Add new QA histogram to monitor cluster angle dsitribu… #17834

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8 changes: 8 additions & 0 deletions PWGEM/PhotonMeson/Tasks/taskPi0FlowEMC.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -133,6 +133,7 @@ struct TaskPi0FlowEMC {
ConfigurableAxis thnConfigAxisCosDeltaPhi{"thnConfigAxisCosDeltaPhi", {8, -1., 1.}, "cos(delta phi) axis for the current event"};
ConfigurableAxis thnConfigAxisM02{"thnConfigAxisM02", {200, 0., 5.}, "M02 axis for the EMCal cluster"};
ConfigurableAxis thnConfigAxisEnergyCalib{"thnConfigAxisEnergyCalib", {200, 0., 20.}, "energy axis for the emcal clusters for the calibration process"};
ConfigurableAxis thConfigAxisEtaPhiAngle{"thConfigAxisEtaPhiAngle", {180, -o2::constants::math::PI, o2::constants::math::PI}, "atan2(#Delta#eta,#Delta#varphi) axis (deg)"};

EMPhotonEventCut fEMEventCut;
struct : ConfigurableGroup {
Expand Down Expand Up @@ -417,6 +418,7 @@ struct TaskPi0FlowEMC {
const AxisSpec thnAxisMixingVtx{mixingConfig.cfgVtxBins, "#it{z} (cm)"};
const AxisSpec thnAxisMixingCent{mixingConfig.cfgCentBins, "Centrality (%)"};
const AxisSpec thnAxisMixingEP{mixingConfig.cfgEPBins, Form("cos(%d#varphi)", harmonic.value)};
const AxisSpec thAxisEtaPhiAngle{thConfigAxisEtaPhiAngle, "atan2(#Delta#eta,#Delta#varphi) (rad)"};

if (!doprocessM02) {
registry.add("hSparsePi0Flow", "<v_n> vs m_{inv} vs p_T vs cent for same event", HistType::kTProfile3D, {thnAxisInvMass, thnAxisPt, thnAxisCent});
Expand Down Expand Up @@ -470,6 +472,8 @@ struct TaskPi0FlowEMC {
registry.add("mesonQA/hInvMassPtMixed", "Histo for inv pair mass vs pt for mixed event", HistType::kTH2D, {thnAxisInvMass, thnAxisPt});
registry.add("mesonQA/hTanThetaPhiMixed", "Histo for identification of conversion cluster for mixed event", HistType::kTH2D, {thnAxisInvMass, thAxisTanThetaPhi});
registry.add("mesonQA/hAlphaPtMixed", "Histo of meson asymmetry vs pT for mixed event", HistType::kTH2D, {thAxisAlpha, thnAxisPt});
registry.add("mesonQA/hEtaPhiAngleMassCent", "atan2(#Delta#eta,#Delta#varphi) vs m_{inv} vs cent, same event", HistType::kTH3D, {thAxisEtaPhiAngle, thnAxisInvMass, thnAxisCent});
registry.add("mesonQA/hEtaPhiAngleMassCentMixed", "atan2(#Delta#eta,#Delta#varphi) vs m_{inv} vs cent, mixed event", HistType::kTH3D, {thAxisEtaPhiAngle, thnAxisInvMass, thnAxisCent});
}

if (correctionConfig.doEMCalCalib.value) {
Expand Down Expand Up @@ -1066,6 +1070,7 @@ struct TaskPi0FlowEMC {

float dTheta = v1.Theta() - v2.Theta();
float dPhi = v1.Phi() - v2.Phi();
float dEta = v1.Eta() - v2.Eta();
float openingAngle = std::acos(v1.Vect().Dot(v2.Vect()) / (v1.P() * v2.P()));

registry.fill(HIST("hMesonCuts"), 1);
Expand All @@ -1088,6 +1093,7 @@ struct TaskPi0FlowEMC {
registry.fill(HIST("mesonQA/hInvMassPt"), vMeson.M(), vMeson.Pt());
registry.fill(HIST("mesonQA/hTanThetaPhi"), vMeson.M(), getAngleDegree(std::atan(dTheta / dPhi)));
registry.fill(HIST("mesonQA/hAlphaPt"), (v1.E() - v2.E()) / (v1.E() + v2.E()), vMeson.Pt());
registry.fill(HIST("mesonQA/hEtaPhiAngleMassCent"), RecoDecay::constrainAngle(std::atan2(dEta, dPhi), -o2::constants::math::PI), vMeson.M(), getCentrality(collision));
}
if (mesonConfig.enableTanThetadPhi.value && mesonConfig.minTanThetadPhi > std::fabs(getAngleDegree(std::atan(dTheta / dPhi)))) {
registry.fill(HIST("hMesonCuts"), 5);
Expand Down Expand Up @@ -1227,6 +1233,7 @@ struct TaskPi0FlowEMC {

float dTheta = v1.Theta() - v2.Theta();
float dPhi = v1.Phi() - v2.Phi();
float dEta = v1.Eta() - eta2;
float openingAngle = std::acos(v1.Vect().Dot(v2.Vect()) / (v1.P() * v2.P()));

registry.fill(HIST("hMesonCutsMixed"), 1);
Expand All @@ -1246,6 +1253,7 @@ struct TaskPi0FlowEMC {
registry.fill(HIST("mesonQA/hInvMassPtMixed"), vMeson.M(), vMeson.Pt());
registry.fill(HIST("mesonQA/hTanThetaPhiMixed"), vMeson.M(), getAngleDegree(std::atan(dTheta / dPhi)));
registry.fill(HIST("mesonQA/hAlphaPtMixed"), (v1.E() - v2.E()) / (v1.E() + v2.E()), vMeson.Pt());
registry.fill(HIST("mesonQA/hEtaPhiAngleMassCentMixed"), RecoDecay::constrainAngle(std::atan2(dEta, dPhi), -o2::constants::math::PI), vMeson.M(), getCentrality(c1));
}
if (mesonConfig.enableTanThetadPhi.value && mesonConfig.minTanThetadPhi > std::fabs(getAngleDegree(std::atan(dTheta / dPhi)))) {
registry.fill(HIST("hMesonCutsMixed"), 5);
Expand Down
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