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dsekihatdsekihat
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[PWGEM/Dilepton] remove fabs from polarization (#13152)
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-158
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2 files changed

+167
-158
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‎PWGEM/Dilepton/Core/Dilepton.h‎

Lines changed: 14 additions & 11 deletions
Original file line numberDiff line numberDiff line change
@@ -131,8 +131,9 @@ struct Dilepton {
131131
// ConfigurableAxis ConfMmumuBins{"ConfMmumuBins", {VARIABLE_WIDTH, 0.20, 0.21, 0.22, 0.23, 0.24, 0.25, 0.26, 0.27, 0.28, 0.29, 0.30, 0.31, 0.32, 0.33, 0.34, 0.35, 0.36, 0.37, 0.38, 0.39, 0.40, 0.41, 0.42, 0.43, 0.44, 0.45, 0.46, 0.47, 0.48, 0.49, 0.50, 0.51, 0.52, 0.53, 0.54, 0.55, 0.56, 0.57, 0.58, 0.59, 0.60, 0.61, 0.62, 0.63, 0.64, 0.65, 0.66, 0.67, 0.68, 0.69, 0.70, 0.71, 0.72, 0.73, 0.74, 0.75, 0.76, 0.77, 0.78, 0.79, 0.80, 0.81, 0.82, 0.83, 0.84, 0.85, 0.86, 0.87, 0.88, 0.89, 0.90, 0.91, 0.92, 0.93, 0.94, 0.95, 0.96, 0.97, 0.98, 0.99, 1.00, 1.01, 1.02, 1.03, 1.04, 1.05, 1.06, 1.07, 1.08, 1.09, 1.10, 1.11,1.12,1.13,1.14,1.15,1.16,1.17,1.18,1.19, 1.20, 1.30, 1.40, 1.50, 1.60, 1.70, 1.80, 1.90, 2.00, 2.10, 2.20, 2.30, 2.40, 2.50, 2.60, 2.70, 2.75, 2.80, 2.85, 2.90, 2.95, 3.00, 3.05, 3.10, 3.15, 3.20, 3.25, 3.30, 3.35, 3.40, 3.45, 3.50, 3.55, 3.60, 3.65, 3.70, 3.75, 3.80, 3.85, 3.90, 3.95, 4.00, 4.10, 4.20, 4.30, 4.40, 4.50, 4.60, 4.70, 4.80, 4.90, 5.00, 5.10, 5.20, 5.30, 5.40, 5.50, 5.60, 5.70, 5.80, 5.90, 6.00, 6.10, 6.20, 6.30, 6.40, 6.50, 6.60, 6.70, 6.80, 6.90, 7.00, 7.10, 7.20, 7.30, 7.40, 7.50, 7.60, 7.70, 7.80, 7.90, 8.00, 8.10, 8.20, 8.30, 8.40, 8.50, 8.60, 8.70, 8.80, 8.90, 9.00, 9.10, 9.20, 9.30, 9.40, 9.50, 9.60, 9.70, 9.80, 9.90, 10.00, 10.10, 10.20, 10.30, 10.40, 10.50, 10.60, 10.70, 10.80, 10.90, 11.00, 11.50, 12.00}, "mmumu bins for output histograms"}; // for dimuon. one can copy bins here to hyperloop page.
132132

133133
ConfigurableAxis ConfSPBins{"ConfSPBins", {200, -5, 5}, "SP bins for flow analysis"};
134-
ConfigurableAxis ConfPolarizationPhiBins{"ConfPolarizationPhiBins", {6, 0.f, M_PI}, "phi bins for polarization analysis"};
135-
ConfigurableAxis ConfPolarizationCosThetaBins{"ConfPolarizationCosThetaBins", {5, 0.f, 1.f}, "phi bins for polarization analysis"};
134+
ConfigurableAxis ConfPolarizationPhiBins{"ConfPolarizationPhiBins", {1, 0.f, 2 * M_PI}, "phi bins for polarization analysis"};
135+
ConfigurableAxis ConfPolarizationCosThetaBins{"ConfPolarizationCosThetaBins", {20, -1.f, 1.f}, "cos(theta) bins for polarization analysis"};
136+
ConfigurableAxis ConfPolarizationQuadMomBins{"ConfPolarizationQuadMomBins", {15, -0.5, 1}, "quadrupole moment bins for polarization analysis"}; // quardrupole moment <(3 x cos^2(theta) -1)/2>
136137

137138
EMEventCut fEMEventCut;
138139
struct : ConfigurableGroup {
@@ -612,7 +613,8 @@ struct Dilepton {
612613

613614
const AxisSpec axis_cos_theta{ConfPolarizationCosThetaBins, Form("|cos(#theta^{%s})|", frameName.data())};
614615
const AxisSpec axis_phi{ConfPolarizationPhiBins, Form("|#varphi^{%s}| (rad.)", frameName.data())};
615-
fRegistry.add("Pair/same/uls/hs", "dilepton", kTHnSparseD, {axis_mass, axis_pt, axis_dca, axis_y, axis_cos_theta, axis_phi}, true);
616+
const AxisSpec axis_quadmom{ConfPolarizationQuadMomBins, Form("#frac{3 cos^{2}(#theta^{%s}) -1}{2}", frameName.data())};
617+
fRegistry.add("Pair/same/uls/hs", "dilepton", kTHnSparseD, {axis_mass, axis_pt, axis_dca, axis_y, axis_cos_theta, axis_phi, axis_quadmom}, true);
616618
fRegistry.addClone("Pair/same/uls/", "Pair/same/lspp/");
617619
fRegistry.addClone("Pair/same/uls/", "Pair/same/lsmm/");
618620
fRegistry.addClone("Pair/same/", "Pair/mix/");
@@ -979,14 +981,14 @@ struct Dilepton {
979981
} else if (cfgPolarizationFrame == 1) {
980982
o2::aod::pwgem::dilepton::utils::pairutil::getAngleHX(std::array<float, 4>{t1.px(), t1.py(), t1.pz(), leptonM1}, std::array<float, 4>{t2.px(), t2.py(), t2.pz(), leptonM2}, beamE1, beamE2, beamP1, beamP2, t1.sign(), cos_thetaPol, phiPol);
981983
}
982-
o2::math_utils::bringToPMPi(phiPol);
984+
o2::math_utils::bringTo02Pi(phiPol);
983985

984986
if (t1.sign() * t2.sign() < 0) { // ULS
985-
fRegistry.fill(HIST("Pair/") + HIST(event_pair_types[ev_id]) + HIST("uls/hs"), v12.M(), v12.Pt(), pair_dca, v12.Rapidity(), aco, asym, std::fabs(dphi_e_ee), std::fabs(cos_thetaPol), weight);
987+
fRegistry.fill(HIST("Pair/") + HIST(event_pair_types[ev_id]) + HIST("uls/hs"), v12.M(), v12.Pt(), pair_dca, v12.Rapidity(), aco, asym, std::fabs(dphi_e_ee), cos_thetaPol, weight);
986988
} else if (t1.sign() > 0 && t2.sign() > 0) { // LS++
987-
fRegistry.fill(HIST("Pair/") + HIST(event_pair_types[ev_id]) + HIST("lspp/hs"), v12.M(), v12.Pt(), pair_dca, v12.Rapidity(), aco, asym, std::fabs(dphi_e_ee), std::fabs(cos_thetaPol), weight);
989+
fRegistry.fill(HIST("Pair/") + HIST(event_pair_types[ev_id]) + HIST("lspp/hs"), v12.M(), v12.Pt(), pair_dca, v12.Rapidity(), aco, asym, std::fabs(dphi_e_ee), cos_thetaPol, weight);
988990
} else if (t1.sign() < 0 && t2.sign() < 0) { // LS--
989-
fRegistry.fill(HIST("Pair/") + HIST(event_pair_types[ev_id]) + HIST("lsmm/hs"), v12.M(), v12.Pt(), pair_dca, v12.Rapidity(), aco, asym, std::fabs(dphi_e_ee), std::fabs(cos_thetaPol), weight);
991+
fRegistry.fill(HIST("Pair/") + HIST(event_pair_types[ev_id]) + HIST("lsmm/hs"), v12.M(), v12.Pt(), pair_dca, v12.Rapidity(), aco, asym, std::fabs(dphi_e_ee), cos_thetaPol, weight);
990992
}
991993
} else if (cfgAnalysisType == static_cast<int>(o2::aod::pwgem::dilepton::utils::pairutil::DileptonAnalysisType::kFlowV2) || cfgAnalysisType == static_cast<int>(o2::aod::pwgem::dilepton::utils::pairutil::DileptonAnalysisType::kFlowV3)) {
992994
std::array<float, 2> q2ft0m = {collision.q2xft0m(), collision.q2yft0m()};
@@ -1036,14 +1038,15 @@ struct Dilepton {
10361038
} else if (cfgPolarizationFrame == 1) {
10371039
o2::aod::pwgem::dilepton::utils::pairutil::getAngleHX(std::array<float, 4>{t1.px(), t1.py(), t1.pz(), leptonM1}, std::array<float, 4>{t2.px(), t2.py(), t2.pz(), leptonM2}, beamE1, beamE2, beamP1, beamP2, t1.sign(), cos_thetaPol, phiPol);
10381040
}
1039-
o2::math_utils::bringToPMPi(phiPol);
1041+
o2::math_utils::bringTo02Pi(phiPol);
1042+
float quadmom = (3.f * std::pow(cos_thetaPol, 2) - 1.f) / 2.f;
10401043

10411044
if (t1.sign() * t2.sign() < 0) { // ULS
1042-
fRegistry.fill(HIST("Pair/") + HIST(event_pair_types[ev_id]) + HIST("uls/hs"), v12.M(), v12.Pt(), pair_dca, v12.Rapidity(), std::fabs(cos_thetaPol), std::fabs(phiPol), weight);
1045+
fRegistry.fill(HIST("Pair/") + HIST(event_pair_types[ev_id]) + HIST("uls/hs"), v12.M(), v12.Pt(), pair_dca, v12.Rapidity(), cos_thetaPol, phiPol, quadmom, weight);
10431046
} else if (t1.sign() > 0 && t2.sign() > 0) { // LS++
1044-
fRegistry.fill(HIST("Pair/") + HIST(event_pair_types[ev_id]) + HIST("lspp/hs"), v12.M(), v12.Pt(), pair_dca, v12.Rapidity(), std::fabs(cos_thetaPol), std::fabs(phiPol), weight);
1047+
fRegistry.fill(HIST("Pair/") + HIST(event_pair_types[ev_id]) + HIST("lspp/hs"), v12.M(), v12.Pt(), pair_dca, v12.Rapidity(), cos_thetaPol, phiPol, quadmom, weight);
10451048
} else if (t1.sign() < 0 && t2.sign() < 0) { // LS--
1046-
fRegistry.fill(HIST("Pair/") + HIST(event_pair_types[ev_id]) + HIST("lsmm/hs"), v12.M(), v12.Pt(), pair_dca, v12.Rapidity(), std::fabs(cos_thetaPol), std::fabs(phiPol), weight);
1049+
fRegistry.fill(HIST("Pair/") + HIST(event_pair_types[ev_id]) + HIST("lsmm/hs"), v12.M(), v12.Pt(), pair_dca, v12.Rapidity(), cos_thetaPol, phiPol, quadmom, weight);
10471050
}
10481051
} else if (cfgAnalysisType == static_cast<int>(o2::aod::pwgem::dilepton::utils::pairutil::DileptonAnalysisType::kHFll)) {
10491052
float dphi = v1.Phi() - v2.Phi();

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