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PWGEM/Dilepton : improve HFee selection #6939

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Merged
dsekihat merged 1 commit into from
Jul 22, 2024
Merged

PWGEM/Dilepton : improve HFee selection #6939

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4 changes: 2 additions & 2 deletions PWGEM/Dilepton/Core/PhotonHBT.h
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Original file line number Diff line number Diff line change
Expand Up @@ -498,8 +498,8 @@ struct PhotonHBT {
continue;
}
o2::aod::pwgem::dilepton::utils::eventhistogram::fillEventInfo<1, -1>(&fRegistry, collision);
fRegistry.fill(HIST("Event/before/hCollisionCounter"), 10.0); // accepted
fRegistry.fill(HIST("Event/after/hCollisionCounter"), 10.0); // accepted
fRegistry.fill(HIST("Event/before/hCollisionCounter"), o2::aod::pwgem::dilepton::utils::eventhistogram::nbin_ev); // accepted
fRegistry.fill(HIST("Event/after/hCollisionCounter"), o2::aod::pwgem::dilepton::utils::eventhistogram::nbin_ev); // accepted

int zbin = lower_bound(zvtx_bin_edges.begin(), zvtx_bin_edges.end(), collision.posZ()) - zvtx_bin_edges.begin() - 1;
if (zbin < 0) {
Expand Down
36 changes: 24 additions & 12 deletions PWGEM/Dilepton/Utils/MCUtilities.h
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Original file line number Diff line number Diff line change
Expand Up @@ -193,6 +193,11 @@ int IsFromBeauty(TMCParticle const& p, TMCParticles const& mcparticles)
}

int motherid = p.mothersIds()[0]; // first mother index
auto mp_tmp = mcparticles.iteratorAt(motherid);
if (abs(mp_tmp.pdgCode()) < 1e+9 && (std::to_string(abs(mp_tmp.pdgCode()))[std::to_string(abs(mp_tmp.pdgCode())).length() - 2] == '5' && std::to_string(abs(mp_tmp.pdgCode()))[std::to_string(abs(mp_tmp.pdgCode())).length() - 3] == '5') && abs(mp_tmp.pdgCode()) % 2 == 1) {
return -999; // reject bottomonia
}

while (motherid > -1) {
if (motherid < mcparticles.size()) { // protect against bad mother indices. why is this needed?
auto mp = mcparticles.iteratorAt(motherid);
Expand Down Expand Up @@ -220,6 +225,10 @@ int IsFromCharm(TMCParticle const& p, TMCParticles const& mcparticles)
}

int motherid = p.mothersIds()[0]; // first mother index
auto mp_tmp = mcparticles.iteratorAt(motherid);
if (abs(mp_tmp.pdgCode()) < 1e+9 && (std::to_string(abs(mp_tmp.pdgCode()))[std::to_string(abs(mp_tmp.pdgCode())).length() - 2] == '4' && std::to_string(abs(mp_tmp.pdgCode()))[std::to_string(abs(mp_tmp.pdgCode())).length() - 3] == '4') && abs(mp_tmp.pdgCode()) % 2 == 1) {
return -999; // reject bottomonia
}
while (motherid > -1) {
if (motherid < mcparticles.size()) { // protect against bad mother indices. why is this needed?
auto mp = mcparticles.iteratorAt(motherid);
Expand Down Expand Up @@ -290,14 +299,14 @@ int IsHF(TMCParticle1 const& p1, TMCParticle2 const& p2, TMCParticles const& mcp
}
}

bool is_direct_from_b1 = abs(mothers_pdg1[0]) < 1e+9 && (std::to_string(mothers_pdg1[0])[std::to_string(mothers_pdg1[0]).length() - 3] == '5' || std::to_string(mothers_pdg1[0])[std::to_string(mothers_pdg1[0]).length() - 4] == '5');
bool is_direct_from_b2 = abs(mothers_pdg2[0]) < 1e+9 && (std::to_string(mothers_pdg2[0])[std::to_string(mothers_pdg2[0]).length() - 3] == '5' || std::to_string(mothers_pdg2[0])[std::to_string(mothers_pdg2[0]).length() - 4] == '5');
bool is_prompt_c1 = abs(mothers_pdg1[0]) < 1e+9 && (std::to_string(mothers_pdg1[0])[std::to_string(mothers_pdg1[0]).length() - 3] == '4' || std::to_string(mothers_pdg1[0])[std::to_string(mothers_pdg1[0]).length() - 4] == '4') && IsFromBeauty(p1, mcparticles) < 0;
bool is_prompt_c2 = abs(mothers_pdg2[0]) < 1e+9 && (std::to_string(mothers_pdg2[0])[std::to_string(mothers_pdg2[0]).length() - 3] == '4' || std::to_string(mothers_pdg2[0])[std::to_string(mothers_pdg2[0]).length() - 4] == '4') && IsFromBeauty(p2, mcparticles) < 0;
bool is_c_from_b1 = abs(mothers_pdg1[0]) < 1e+9 && (std::to_string(mothers_pdg1[0])[std::to_string(mothers_pdg1[0]).length() - 3] == '4' || std::to_string(mothers_pdg1[0])[std::to_string(mothers_pdg1[0]).length() - 4] == '4') && IsFromBeauty(p1, mcparticles) > 0;
bool is_c_from_b2 = abs(mothers_pdg2[0]) < 1e+9 && (std::to_string(mothers_pdg2[0])[std::to_string(mothers_pdg2[0]).length() - 3] == '4' || std::to_string(mothers_pdg2[0])[std::to_string(mothers_pdg2[0]).length() - 4] == '4') && IsFromBeauty(p2, mcparticles) > 0;
bool is_direct_from_b1 = IsFromBeauty(p1, mcparticles) > 0 && IsFromCharm(p1, mcparticles) < 0;
bool is_direct_from_b2 = IsFromBeauty(p2, mcparticles) > 0 && IsFromCharm(p2, mcparticles) < 0;
bool is_prompt_c1 = IsFromBeauty(p1, mcparticles) < 0 && IsFromCharm(p1, mcparticles) > 0;
bool is_prompt_c2 = IsFromBeauty(p2, mcparticles) < 0 && IsFromCharm(p2, mcparticles) > 0;
bool is_c_from_b1 = IsFromBeauty(p1, mcparticles) > 0 && IsFromCharm(p1, mcparticles) > 0;
bool is_c_from_b2 = IsFromBeauty(p2, mcparticles) > 0 && IsFromCharm(p2, mcparticles) > 0;

if (is_prompt_c1 && is_prompt_c2 && p1.pdgCode() * p2.pdgCode() < 0) {
if (is_direct_from_b1 && is_direct_from_b2 && p1.pdgCode() * p2.pdgCode() < 0) {
mothers_id1.clear();
mothers_pdg1.clear();
mothers_id2.clear();
Expand All @@ -306,8 +315,9 @@ int IsHF(TMCParticle1 const& p1, TMCParticle2 const& p2, TMCParticles const& mcp
mothers_pdg1.shrink_to_fit();
mothers_id2.shrink_to_fit();
mothers_pdg2.shrink_to_fit();
return static_cast<int>(EM_HFeeType::kCe_Ce); // cc->ee, decay type = 0
} else if (is_direct_from_b1 && is_direct_from_b2 && p1.pdgCode() * p2.pdgCode() < 0) {
return static_cast<int>(EM_HFeeType::kBe_Be); // bb->ee, decay type = 2
}
if (is_prompt_c1 && is_prompt_c2 && p1.pdgCode() * p2.pdgCode() < 0) {
mothers_id1.clear();
mothers_pdg1.clear();
mothers_id2.clear();
Expand All @@ -316,8 +326,9 @@ int IsHF(TMCParticle1 const& p1, TMCParticle2 const& p2, TMCParticles const& mcp
mothers_pdg1.shrink_to_fit();
mothers_id2.shrink_to_fit();
mothers_pdg2.shrink_to_fit();
return static_cast<int>(EM_HFeeType::kBe_Be); // bb->ee, decay type = 2
} else if (is_c_from_b1 && is_c_from_b2 && p1.pdgCode() * p2.pdgCode() < 0) {
return static_cast<int>(EM_HFeeType::kCe_Ce); // cc->ee, decay type = 0
}
if (is_c_from_b1 && is_c_from_b2 && p1.pdgCode() * p2.pdgCode() < 0) {
mothers_id1.clear();
mothers_pdg1.clear();
mothers_id2.clear();
Expand All @@ -327,7 +338,8 @@ int IsHF(TMCParticle1 const& p1, TMCParticle2 const& p2, TMCParticles const& mcp
mothers_id2.shrink_to_fit();
mothers_pdg2.shrink_to_fit();
return static_cast<int>(EM_HFeeType::kBCe_BCe); // b->c->e and b->c->e, decay type = 1
} else if ((is_direct_from_b1 && is_c_from_b2) || (is_direct_from_b2 && is_c_from_b1)) {
}
if ((is_direct_from_b1 && is_c_from_b2) || (is_direct_from_b2 && is_c_from_b1)) {
if (p1.pdgCode() * p2.pdgCode() < 0) { // ULS
for (auto& mid1 : mothers_id1) {
for (auto& mid2 : mothers_id2) {
Expand Down