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[PWGEM] Implement histogram for momentum loss vs DCA, intention to select track w/wo Bremsstrahlung #11843

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Merged
feisenhu merged 1 commit into from
Jun 30, 2025
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[PWGEM] Implement histogram for momentum loss vs DCA, intention to select track w/wo Bremsstrahlung #11843

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14 changes: 14 additions & 0 deletions PWGEM/Dilepton/Core/DileptonMC.h
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Original file line number Diff line number Diff line change
Expand Up @@ -52,14 +52,14 @@
#include <utility>
#include <vector>

using namespace o2;

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[using-directive] 

Do not put using directives at global scope in headers.
using namespace o2::aod;

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[using-directive] 

Do not put using directives at global scope in headers.
using namespace o2::framework;

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[using-directive] 

Do not put using directives at global scope in headers.
using namespace o2::framework::expressions;

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[using-directive] 

Do not put using directives at global scope in headers.
using namespace o2::soa;

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[using-directive] 

Do not put using directives at global scope in headers.
using namespace o2::aod::pwgem::dilepton::utils::mcutil;

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[using-directive] 

Do not put using directives at global scope in headers.
using namespace o2::aod::pwgem::dilepton::utils::emtrackutil;

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[using-directive] 

Do not put using directives at global scope in headers.
using namespace o2::aod::pwgem::dilepton::utils::pairutil;

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[using-directive] 

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using MyCollisions = soa::Join<aod::EMEvents, aod::EMEventsMult, aod::EMEventsCent, aod::EMMCEventLabels>;
using MyCollision = MyCollisions::iterator;
Expand Down Expand Up @@ -338,10 +338,10 @@
const AxisSpec axis_pt_meson{ConfPtllBins, "p_{T} (GeV/c)"}; // for omega, phi meson pT spectra
const AxisSpec axis_y_meson{ConfYllBins, "y"}; // rapidity of meson

const AxisSpec axis_dphi_ee{cfg_nbin_dphi_ee, -M_PI / 2., 3. / 2. * M_PI, "#Delta#varphi = #varphi_{l1} - #varphi_{l2} (rad.)"}; // for kHFll

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[external-pi] 

Use the PI constant (and its multiples and fractions) defined in o2::constants::math.
const AxisSpec axis_deta_ee{cfg_nbin_deta_ee, -2., 2., "#Delta#eta = #eta_{l1} - #eta_{l2}"}; // for kHFll
const AxisSpec axis_cos_theta_cs{cfg_nbin_cos_theta_cs, 0.f, 1.f, "|cos(#theta_{CS})|"}; // for kPolarization, kUPC
const AxisSpec axis_phi_cs{cfg_nbin_phi_cs, 0.f, M_PI, "|#varphi_{CS}| (rad.)"}; // for kPolarization

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[external-pi] 

Use the PI constant (and its multiples and fractions) defined in o2::constants::math.
const AxisSpec axis_aco{cfg_nbin_aco, 0, 1.f, "#alpha = 1 - #frac{|#varphi_{l^{+}} - #varphi_{l^{-}}|}{#pi}"}; // for kUPC
const AxisSpec axis_asym_pt{cfg_nbin_asym_pt, 0, 1.f, "A = #frac{|p_{T,l^{+}} - p_{T,l^{-}}|}{|p_{T,l^{+}} + p_{T,l^{-}}|}"}; // for kUPC
const AxisSpec axis_dphi_e_ee{cfg_nbin_dphi_e_ee, 0, M_PI, "#Delta#varphi = #varphi_{l} - #varphi_{ll} (rad.)"}; // for kUPC
Expand Down Expand Up @@ -425,6 +425,10 @@
fRegistry.add("Pair/sm/Photon/hMvsRxy", "m_{ee} vs. r_{xy};r_{xy}^{true} (cm);m_{ee} (GeV/c^{2})", kTH2F, {{100, 0, 100}, {100, 0.0f, 1.0f}}, true);
fRegistry.add("Pair/sm/PromptPi0/hMvsPhiV", "m_{ee} vs. #varphi_{V};#varphi (rad.);m_{ee} (GeV/c^{2})", kTH2F, {{90, 0, M_PI}, {100, 0.0f, 1.0f}}, true);
fRegistry.add("Pair/sm/NonPromptPi0/hMvsPhiV", "m_{ee} vs. #varphi_{V};#varphi (rad.);m_{ee} (GeV/c^{2})", kTH2F, {{90, 0, M_PI}, {100, 0.0f, 1.0f}}, true);
fRegistry.add("Pair/sm/PromptPi0/hDeltaPtvsDCA", Form("p^{gen}_{T,e} - p^{rec}_{T,e} vs. DCA_{ee};%s;p^{gen}_{T,e} - p^{rec}_{T,e} (GeV/c)", pair_dca_axis_title.c_str()), kTH2F, {{160, 0, 8.}, {220, -1.f, +10.f}}, true);
fRegistry.add("Pair/sm/NonPromptPi0/hDeltaPtvsDCA", Form("p^{gen}_{T,e} - p^{rec}_{T,e} vs. DCA_{ee};%s;p^{gen}_{T,e} - p^{rec}_{T,e} (GeV/c)", pair_dca_axis_title.c_str()), kTH2F, {{160, 0, 8.}, {220, -1.f, +10.f}}, true);
fRegistry.add("Pair/sm/PromptJPsi/hDeltaPtvsDCA", Form("p^{gen}_{T,e} - p^{rec}_{T,e} vs. DCA_{ee};%s;p^{gen}_{T,e} - p^{rec}_{T,e} (GeV/c)", pair_dca_axis_title.c_str()), kTH2F, {{160, 0, 8.}, {220, -1.f, +10.f}}, true);
fRegistry.add("Pair/sm/NonPromptJPsi/hDeltaPtvsDCA", Form("p^{gen}_{T,e} - p^{rec}_{T,e} vs. DCA_{ee};%s;p^{gen}_{T,e} - p^{rec}_{T,e} (GeV/c)", pair_dca_axis_title.c_str()), kTH2F, {{160, 0, 8.}, {220, -1.f, +10.f}}, true);
}

fRegistry.add("Pair/ccbar/c2l_c2l/hadron_hadron/hs", "hs pair", kTHnSparseD, {axis_mass, axis_pt, axis_y, axis_dphi_ee, axis_deta_ee, axis_cos_theta_cs, axis_phi_cs, axis_aco, axis_asym_pt, axis_dphi_e_ee, axis_dca}, true);
Expand Down Expand Up @@ -973,15 +977,21 @@
auto mcmother = mcparticles.iteratorAt(mother_id);
if (mcmother.isPhysicalPrimary() || mcmother.producedByGenerator()) {
if ((t1mc.isPhysicalPrimary() || t1mc.producedByGenerator()) && (t2mc.isPhysicalPrimary() || t2mc.producedByGenerator())) {
float deltaPt1 = t1mc.pt() - t1.pt();
float deltaPt2 = t2mc.pt() - t2.pt();
switch (std::abs(mcmother.pdgCode())) {
case 111:
if (IsFromCharm(mcmother, mcparticles) < 0 && IsFromBeauty(mcmother, mcparticles) < 0) { // prompt pi0
fRegistry.fill(HIST("Pair/sm/PromptPi0/hs"), v12.M(), v12.Pt(), v12.Rapidity(), dphi, deta, std::fabs(cos_thetaCS), std::fabs(phiCS), aco, asym, std::fabs(dphi_e_ee), pair_dca, weight);
fRegistry.fill(HIST("Pair/sm/PromptPi0/hDeltaPtvsDCA"), pair_dca, deltaPt1);
fRegistry.fill(HIST("Pair/sm/PromptPi0/hDeltaPtvsDCA"), pair_dca, deltaPt2);
if constexpr (pairtype == o2::aod::pwgem::dilepton::utils::pairutil::DileptonPairType::kDielectron) {
fRegistry.fill(HIST("Pair/sm/PromptPi0/hMvsPhiV"), phiv, v12.M());
}
} else { // non-prompt pi0
fRegistry.fill(HIST("Pair/sm/NonPromptPi0/hs"), v12.M(), v12.Pt(), v12.Rapidity(), dphi, deta, std::fabs(cos_thetaCS), std::fabs(phiCS), aco, asym, std::fabs(dphi_e_ee), pair_dca, weight);
fRegistry.fill(HIST("Pair/sm/NonPromptPi0/hDeltaPtvsDCA"), pair_dca, deltaPt1);
fRegistry.fill(HIST("Pair/sm/NonPromptPi0/hDeltaPtvsDCA"), pair_dca, deltaPt2);
if constexpr (pairtype == o2::aod::pwgem::dilepton::utils::pairutil::DileptonPairType::kDielectron) {
fRegistry.fill(HIST("Pair/sm/NonPromptPi0/hMvsPhiV"), phiv, v12.M());
}
Expand Down Expand Up @@ -1011,8 +1021,12 @@
case 443: {
if (IsFromBeauty(mcmother, mcparticles) > 0) {
fRegistry.fill(HIST("Pair/sm/NonPromptJPsi/hs"), v12.M(), v12.Pt(), v12.Rapidity(), dphi, deta, std::fabs(cos_thetaCS), std::fabs(phiCS), aco, asym, std::fabs(dphi_e_ee), pair_dca, weight);
fRegistry.fill(HIST("Pair/sm/NonPromptJPsi/hDeltaPtvsDCA"), pair_dca, deltaPt1);
fRegistry.fill(HIST("Pair/sm/NonPromptJPsi/hDeltaPtvsDCA"), pair_dca, deltaPt2);
} else {
fRegistry.fill(HIST("Pair/sm/PromptJPsi/hs"), v12.M(), v12.Pt(), v12.Rapidity(), dphi, deta, std::fabs(cos_thetaCS), std::fabs(phiCS), aco, asym, std::fabs(dphi_e_ee), pair_dca, weight);
fRegistry.fill(HIST("Pair/sm/PromptJPsi/hDeltaPtvsDCA"), pair_dca, deltaPt1);
fRegistry.fill(HIST("Pair/sm/PromptJPsi/hDeltaPtvsDCA"), pair_dca, deltaPt2);
}
break;
}
Expand Down
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