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Merged
dsekihat merged 1 commit into from
Jul 27, 2025
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[PWGEM/Dilepton] add dphiPosition #12275

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18 changes: 16 additions & 2 deletions PWGEM/Dilepton/Core/Dilepton.h
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Original file line number Diff line number Diff line change
Expand Up @@ -60,14 +60,14 @@
#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;

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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] 

Do not put using directives at global scope in headers.

using MyCollisions = soa::Join<aod::EMEvents, aod::EMEventsMult, aod::EMEventsCent, aod::EMEventsQvec>;
using MyCollision = MyCollisions::iterator;
Expand Down Expand Up @@ -113,7 +113,7 @@
Configurable<uint64_t> ndiff_bc_mix{"ndiff_bc_mix", 594, "difference in global BC required in mixed events"};
ConfigurableAxis ConfVtxBins{"ConfVtxBins", {VARIABLE_WIDTH, -10.0f, -8.f, -6.f, -4.f, -2.f, 0.f, 2.f, 4.f, 6.f, 8.f, 10.f}, "Mixing bins - z-vertex"};
ConfigurableAxis ConfCentBins{"ConfCentBins", {VARIABLE_WIDTH, 0.0f, 5.0f, 10.0f, 20.0f, 30.0f, 40.0f, 50.0f, 60.0f, 70.0f, 80.0f, 90.0f, 100.f, 999.f}, "Mixing bins - centrality"};
ConfigurableAxis ConfEPBins{"ConfEPBins", {16, -M_PI / 2, +M_PI / 2}, "Mixing bins - event plane angle"};

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[external-pi] 

Use the PI constant (and its multiples and fractions) defined in o2::constants::math.
ConfigurableAxis ConfOccupancyBins{"ConfOccupancyBins", {VARIABLE_WIDTH, -1, 1e+10}, "Mixing bins - occupancy"};
Configurable<std::string> cfg_swt_name{"cfg_swt_name", "fHighTrackMult", "desired software trigger name"}; // 1 trigger name per 1 task. fHighTrackMult, fHighFt0Mult
// Configurable<int> cfgNtracksPV08Min{"cfgNtracksPV08Min", -1, "min. multNTracksPV"};
Expand Down Expand Up @@ -214,6 +214,7 @@
Configurable<float> cfg_max_its_cluster_size{"cfg_max_its_cluster_size", 16.f, "max ITS cluster size"};
Configurable<float> cfg_min_rel_diff_pin{"cfg_min_rel_diff_pin", -1e+10, "min rel. diff. between pin and ppv"};
Configurable<float> cfg_max_rel_diff_pin{"cfg_max_rel_diff_pin", +1e+10, "max rel. diff. between pin and ppv"};
Configurable<float> cfgRefR{"cfgRefR", 1.2, "reference R (in m) for extrapolation"}; // https://cds.cern.ch/record/1419204

Configurable<int> cfg_pid_scheme{"cfg_pid_scheme", static_cast<int>(DielectronCut::PIDSchemes::kTPChadrejORTOFreq), "pid scheme [kTOFreq : 0, kTPChadrej : 1, kTPChadrejORTOFreq : 2, kTPConly : 3, kTOFif : 4, kPIDML : 5, kTPChadrejORTOFreq_woTOFif : 6]"};
Configurable<float> cfg_min_TPCNsigmaEl{"cfg_min_TPCNsigmaEl", -2.0, "min. TPC n sigma for electron inclusion"};
Expand Down Expand Up @@ -463,7 +464,7 @@
o2::base::Propagator::initFieldFromGRP(grpo);
// Fetch magnetic field from ccdb for current collision
d_bz = grpo->getNominalL3Field();
LOG(info) << "Retrieved GRP for timestamp " << run3grp_timestamp << " with magnetic field of " << d_bz << " kZG";
LOG(info) << "Retrieved GRP for timestamp " << run3grp_timestamp << " with magnetic field of " << d_bz << " kG";
} else {
grpmag = ccdb->getForTimeStamp<o2::parameters::GRPMagField>(grpmagPath, run3grp_timestamp);
if (!grpmag) {
Expand All @@ -472,7 +473,7 @@
o2::base::Propagator::initFieldFromGRP(grpmag);
// Fetch magnetic field from ccdb for current collision
d_bz = std::lround(5.f * grpmag->getL3Current() / 30000.f);
LOG(info) << "Retrieved GRP for timestamp " << run3grp_timestamp << " with magnetic field of " << d_bz << " kZG";
LOG(info) << "Retrieved GRP for timestamp " << run3grp_timestamp << " with magnetic field of " << d_bz << " kG";
}
mRunNumber = collision.runNumber();

Expand Down Expand Up @@ -547,7 +548,9 @@

if (cfgAnalysisType == static_cast<int>(o2::aod::pwgem::dilepton::utils::pairutil::DileptonAnalysisType::kQC)) {
fRegistry.add("Pair/same/uls/hs", "dilepton", kTHnSparseD, {axis_mass, axis_pt, axis_dca}, true);
fRegistry.add("Pair/same/uls/hDeltaEtaDeltaPhi", "#Delta#eta-#Delta#varphi between 2 tracks;#Delta#varphi (rad.);#Delta#eta;", kTH2D, {{180, -M_PI, M_PI}, {400, -2, +2}}, true);

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[external-pi] 

Use the PI constant (and its multiples and fractions) defined in o2::constants::math.
fRegistry.add("Pair/same/uls/hDeltaEtaDeltaPhiPosition", "#Delta#eta-#Delta#varphi^{*} between 2 tracks;#Delta#varphi^{*} (rad.);#Delta#eta;", kTH2D, {{180, -M_PI, M_PI}, {400, -2, +2}}, true);

if constexpr (pairtype == o2::aod::pwgem::dilepton::utils::pairutil::DileptonPairType::kDielectron) {
fRegistry.add("Pair/same/uls/hMvsPhiV", "m_{ee} vs. #varphi_{V};#varphi_{V} (rad.);m_{ee} (GeV/c^{2})", kTH2D, {{90, 0, M_PI}, {100, 0.0f, 1.0f}}, true); // phiv is only for dielectron
fRegistry.add("Pair/same/uls/hMvsOpAng", "m_{ee} vs. angle between 2 tracks;#omega (rad.);m_{ee} (GeV/c^{2})", kTH2D, {{90, 0, M_PI}, {100, 0.0f, 1.0f}}, true);
Expand Down Expand Up @@ -907,12 +910,21 @@
float dphi = t1.sign() * v1.Pt() > t2.sign() * v2.Pt() ? v1.Phi() - v2.Phi() : v2.Phi() - v1.Phi();
o2::math_utils::bringToPMPi(dphi);

float phiPosition1 = t1.phi() + std::asin(t1.sign() * 0.30282 * (d_bz * 0.1) * dielectroncuts.cfgRefR / (2.f * t1.pt()));
float phiPosition2 = t2.phi() + std::asin(t2.sign() * 0.30282 * (d_bz * 0.1) * dielectroncuts.cfgRefR / (2.f * t2.pt()));

phiPosition1 = RecoDecay::constrainAngle(phiPosition1, 0, 1); // 0-2pi
phiPosition2 = RecoDecay::constrainAngle(phiPosition2, 0, 1); // 0-2pi
float dphiPosition = t1.sign() * v1.Pt() > t2.sign() * v2.Pt() ? phiPosition1 - phiPosition2 : phiPosition2 - phiPosition1;
o2::math_utils::bringToPMPi(dphiPosition);

float phiv = o2::aod::pwgem::dilepton::utils::pairutil::getPhivPair(t1.px(), t1.py(), t1.pz(), t2.px(), t2.py(), t2.pz(), t1.sign(), t2.sign(), d_bz);
float opAng = o2::aod::pwgem::dilepton::utils::pairutil::getOpeningAngle(t1.px(), t1.py(), t1.pz(), t2.px(), t2.py(), t2.pz());

if (t1.sign() * t2.sign() < 0) { // ULS
fRegistry.fill(HIST("Pair/") + HIST(event_pair_types[ev_id]) + HIST("uls/hs"), v12.M(), v12.Pt(), pair_dca, weight);
fRegistry.fill(HIST("Pair/") + HIST(event_pair_types[ev_id]) + HIST("uls/hDeltaEtaDeltaPhi"), dphi, deta, weight);
fRegistry.fill(HIST("Pair/") + HIST(event_pair_types[ev_id]) + HIST("uls/hDeltaEtaDeltaPhiPosition"), dphiPosition, deta, weight);
if constexpr (pairtype == o2::aod::pwgem::dilepton::utils::pairutil::DileptonPairType::kDielectron) {
fRegistry.fill(HIST("Pair/") + HIST(event_pair_types[ev_id]) + HIST("uls/hMvsPhiV"), phiv, v12.M(), weight);
fRegistry.fill(HIST("Pair/") + HIST(event_pair_types[ev_id]) + HIST("uls/hMvsOpAng"), opAng, v12.M(), weight);
Expand All @@ -925,6 +937,7 @@
} else if (t1.sign() > 0 && t2.sign() > 0) { // LS++
fRegistry.fill(HIST("Pair/") + HIST(event_pair_types[ev_id]) + HIST("lspp/hs"), v12.M(), v12.Pt(), pair_dca, weight);
fRegistry.fill(HIST("Pair/") + HIST(event_pair_types[ev_id]) + HIST("lspp/hDeltaEtaDeltaPhi"), dphi, deta, weight);
fRegistry.fill(HIST("Pair/") + HIST(event_pair_types[ev_id]) + HIST("lspp/hDeltaEtaDeltaPhiPosition"), dphiPosition, deta, weight);
if constexpr (pairtype == o2::aod::pwgem::dilepton::utils::pairutil::DileptonPairType::kDielectron) {
fRegistry.fill(HIST("Pair/") + HIST(event_pair_types[ev_id]) + HIST("lspp/hMvsPhiV"), phiv, v12.M(), weight);
fRegistry.fill(HIST("Pair/") + HIST(event_pair_types[ev_id]) + HIST("lspp/hMvsOpAng"), opAng, v12.M(), weight);
Expand All @@ -937,6 +950,7 @@
} else if (t1.sign() < 0 && t2.sign() < 0) { // LS--
fRegistry.fill(HIST("Pair/") + HIST(event_pair_types[ev_id]) + HIST("lsmm/hs"), v12.M(), v12.Pt(), pair_dca, weight);
fRegistry.fill(HIST("Pair/") + HIST(event_pair_types[ev_id]) + HIST("lsmm/hDeltaEtaDeltaPhi"), dphi, deta, weight);
fRegistry.fill(HIST("Pair/") + HIST(event_pair_types[ev_id]) + HIST("lsmm/hDeltaEtaDeltaPhiPosition"), dphiPosition, deta, weight);
if constexpr (pairtype == o2::aod::pwgem::dilepton::utils::pairutil::DileptonPairType::kDielectron) {
fRegistry.fill(HIST("Pair/") + HIST(event_pair_types[ev_id]) + HIST("lsmm/hMvsPhiV"), phiv, v12.M(), weight);
fRegistry.fill(HIST("Pair/") + HIST(event_pair_types[ev_id]) + HIST("lsmm/hMvsOpAng"), opAng, v12.M(), weight);
Expand Down
13 changes: 11 additions & 2 deletions PWGEM/Dilepton/Core/DileptonMC.h
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Expand Up @@ -284,6 +284,7 @@ struct DileptonMC {
Configurable<float> cfg_max_DPhi_wrt_matchedMCHMID{"cfg_max_DPhi_wrt_matchedMCHMID", 1e+10f, "max. dphi between MFT-MCH-MID and MCH-MID"};
Configurable<bool> requireMFTHitMap{"requireMFTHitMap", false, "flag to apply MFT hit map"};
Configurable<std::vector<int>> requiredMFTDisks{"requiredMFTDisks", std::vector<int>{0}, "hit map on MFT disks [0,1,2,3,4]. logical-OR of each double-sided disk"};
Configurable<bool> rejectWrongMatch{"rejectWrongMatch", false, "flag to reject wrong match between MFT and MCH-MID"}; // this is only for MC study, as we don't know correct match in data.
} dimuoncuts;

o2::aod::rctsel::RCTFlagsChecker rctChecker;
Expand Down Expand Up @@ -577,7 +578,7 @@ struct DileptonMC {
o2::base::Propagator::initFieldFromGRP(grpo);
// Fetch magnetic field from ccdb for current collision
d_bz = grpo->getNominalL3Field();
LOG(info) << "Retrieved GRP for timestamp " << run3grp_timestamp << " with magnetic field of " << d_bz << " kZG";
LOG(info) << "Retrieved GRP for timestamp " << run3grp_timestamp << " with magnetic field of " << d_bz << " kG";
} else {
grpmag = ccdb->getForTimeStamp<o2::parameters::GRPMagField>(grpmagPath, run3grp_timestamp);
if (!grpmag) {
Expand All @@ -586,7 +587,7 @@ struct DileptonMC {
o2::base::Propagator::initFieldFromGRP(grpmag);
// Fetch magnetic field from ccdb for current collision
d_bz = std::lround(5.f * grpmag->getL3Current() / 30000.f);
LOG(info) << "Retrieved GRP for timestamp " << run3grp_timestamp << " with magnetic field of " << d_bz << " kZG";
LOG(info) << "Retrieved GRP for timestamp " << run3grp_timestamp << " with magnetic field of " << d_bz << " kG";
}
mRunNumber = collision.runNumber();

Expand Down Expand Up @@ -836,6 +837,14 @@ struct DileptonMC {
if (!o2::aod::pwgem::dilepton::utils::emtrackutil::isBestMatch<false>(t2, cut, tracks)) {
return false;
}
if (dimuoncuts.rejectWrongMatch) {
if (t1.trackType() == static_cast<uint8_t>(o2::aod::fwdtrack::ForwardTrackTypeEnum::GlobalMuonTrack) && t1.emmcparticleId() != t1.emmftmcparticleId()) {
return false;
}
if (t2.trackType() == static_cast<uint8_t>(o2::aod::fwdtrack::ForwardTrackTypeEnum::GlobalMuonTrack) && t2.emmcparticleId() != t2.emmftmcparticleId()) {
return false;
}
}

if (!cut.IsSelectedPair(t1, t2)) {
return false;
Expand Down
4 changes: 4 additions & 0 deletions PWGEM/Dilepton/Core/SingleTrackQCMC.h
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Expand Up @@ -217,6 +217,7 @@ struct SingleTrackQCMC {
Configurable<float> cfg_max_DPhi_wrt_matchedMCHMID{"cfg_max_DPhi_wrt_matchedMCHMID", 1e+10f, "max. dphi between MFT-MCH-MID and MCH-MID"};
Configurable<bool> requireMFTHitMap{"requireMFTHitMap", false, "flag to apply MFT hit map"};
Configurable<std::vector<int>> requiredMFTDisks{"requiredMFTDisks", std::vector<int>{0}, "hit map on MFT disks [0,1,2,3,4]. logical-OR of each double-sided disk"};
Configurable<bool> rejectWrongMatch{"rejectWrongMatch", false, "flag to reject wrong match between MFT and MCH-MID"}; // this is only for MC study, as we don't know correct match in data.
} dimuoncuts;

o2::aod::rctsel::RCTFlagsChecker rctChecker;
Expand Down Expand Up @@ -820,6 +821,9 @@ struct SingleTrackQCMC {
if (!o2::aod::pwgem::dilepton::utils::emtrackutil::isBestMatch(track, cut, tracks)) {
continue;
}
if (dimuoncuts.rejectWrongMatch && track.trackType() == static_cast<uint8_t>(o2::aod::fwdtrack::ForwardTrackTypeEnum::GlobalMuonTrack) && track.emmcparticleId() != track.emmftmcparticleId()) {
continue;
}
}

auto mcmother = mcparticles.iteratorAt(mctrack.mothersIds()[0]);
Expand Down
56 changes: 56 additions & 0 deletions PWGEM/Dilepton/Tasks/prefilterDielectron.cxx
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Expand Up @@ -129,6 +129,7 @@ struct prefilterDielectron {
Configurable<float> cfg_max_its_cluster_size{"cfg_max_its_cluster_size", 16.f, "max ITS cluster size"};
Configurable<float> cfg_min_rel_diff_pin{"cfg_min_rel_diff_pin", -1e+10, "min rel. diff. between pin and ppv"};
Configurable<float> cfg_max_rel_diff_pin{"cfg_max_rel_diff_pin", +1e+10, "max rel. diff. between pin and ppv"};
Configurable<float> cfgRefR{"cfgRefR", 1.2, "reference R (in m) for extrapolation"}; // https://cds.cern.ch/record/1419204

Configurable<int> cfg_pid_scheme{"cfg_pid_scheme", static_cast<int>(DielectronCut::PIDSchemes::kTPChadrejORTOFreq), "pid scheme [kTOFreq : 0, kTPChadrej : 1, kTPChadrejORTOFreq : 2, kTPConly : 3, kTOFif : 4, kPIDML : 5, kTPChadrejORTOFreq_woTOFif : 6]"};
Configurable<float> cfg_min_TPCNsigmaEl{"cfg_min_TPCNsigmaEl", -2.0, "min. TPC n sigma for electron inclusion"};
Expand Down Expand Up @@ -236,6 +237,7 @@ struct prefilterDielectron {
fRegistry.add("Pair/before/uls/hMvsPt", "m_{ee} vs. p_{T,ee}", kTH2D, {axis_mass, axis_pair_pt}, true);
fRegistry.add("Pair/before/uls/hMvsPhiV", "m_{ee} vs. #varphi_{V};#varphi_{V} (rad.);m_{ee} (GeV/c^{2})", kTH2D, {axis_phiv, {200, 0, 1}}, true);
fRegistry.add("Pair/before/uls/hDeltaEtaDeltaPhi", "#Delta#eta-#Delta#varphi between 2 tracks;#Delta#varphi (rad.);#Delta#eta;", kTH2D, {{180, -M_PI, M_PI}, {200, -1, +1}}, true);
fRegistry.add("Pair/before/uls/hDeltaEtaDeltaPhiPosition", "#Delta#eta-#Delta#varphi^{*} between 2 tracks;#Delta#varphi^{*} (rad.);#Delta#eta;", kTH2D, {{180, -M_PI, M_PI}, {200, -1, +1}}, true);
fRegistry.addClone("Pair/before/uls/", "Pair/before/lspp/");
fRegistry.addClone("Pair/before/uls/", "Pair/before/lsmm/");
fRegistry.addClone("Pair/before/", "Pair/after/");
Expand Down Expand Up @@ -382,9 +384,18 @@ struct prefilterDielectron {
float dphi = pos.sign() * v1.Pt() > ele.sign() * v2.Pt() ? v1.Phi() - v2.Phi() : v2.Phi() - v1.Phi();
o2::math_utils::bringToPMPi(dphi);

float phiPosition1 = pos.phi() + std::asin(pos.sign() * 0.30282 * (d_bz * 0.1) * dielectroncuts.cfgRefR / (2.f * pos.pt()));
float phiPosition2 = ele.phi() + std::asin(ele.sign() * 0.30282 * (d_bz * 0.1) * dielectroncuts.cfgRefR / (2.f * ele.pt()));

phiPosition1 = RecoDecay::constrainAngle(phiPosition1, 0, 1); // 0-2pi
phiPosition2 = RecoDecay::constrainAngle(phiPosition2, 0, 1); // 0-2pi
float dphiPosition = pos.sign() * v1.Pt() > ele.sign() * v2.Pt() ? phiPosition1 - phiPosition2 : phiPosition2 - phiPosition1;
o2::math_utils::bringToPMPi(dphiPosition);

fRegistry.fill(HIST("Pair/before/uls/hMvsPhiV"), phiv, v12.M());
fRegistry.fill(HIST("Pair/before/uls/hMvsPt"), v12.M(), v12.Pt());
fRegistry.fill(HIST("Pair/before/uls/hDeltaEtaDeltaPhi"), dphi, deta);
fRegistry.fill(HIST("Pair/before/uls/hDeltaEtaDeltaPhiPosition"), dphiPosition, deta);

if (dielectroncuts.cfg_min_mass < v12.M() && v12.M() < dielectroncuts.cfg_max_mass) {
map_pfb[pos.globalIndex()] |= 1 << static_cast<int>(o2::aod::pwgem::dilepton::utils::pairutil::DileptonPrefilterBitDerived::kMee);
Expand Down Expand Up @@ -416,9 +427,18 @@ struct prefilterDielectron {
float dphi = pos1.sign() * v1.Pt() > pos2.sign() * v2.Pt() ? v1.Phi() - v2.Phi() : v2.Phi() - v1.Phi();
o2::math_utils::bringToPMPi(dphi);

float phiPosition1 = pos1.phi() + std::asin(pos1.sign() * 0.30282 * (d_bz * 0.1) * dielectroncuts.cfgRefR / (2.f * pos1.pt()));
float phiPosition2 = pos2.phi() + std::asin(pos2.sign() * 0.30282 * (d_bz * 0.1) * dielectroncuts.cfgRefR / (2.f * pos2.pt()));

phiPosition1 = RecoDecay::constrainAngle(phiPosition1, 0, 1); // 0-2pi
phiPosition2 = RecoDecay::constrainAngle(phiPosition2, 0, 1); // 0-2pi
float dphiPosition = pos1.sign() * v1.Pt() > pos2.sign() * v2.Pt() ? phiPosition1 - phiPosition2 : phiPosition2 - phiPosition1;
o2::math_utils::bringToPMPi(dphiPosition);

fRegistry.fill(HIST("Pair/before/lspp/hMvsPt"), v12.M(), v12.Pt());
fRegistry.fill(HIST("Pair/before/lspp/hMvsPhiV"), phiv, v12.M());
fRegistry.fill(HIST("Pair/before/lspp/hDeltaEtaDeltaPhi"), dphi, deta);
fRegistry.fill(HIST("Pair/before/lspp/hDeltaEtaDeltaPhiPosition"), dphiPosition, deta);

if (dielectroncuts.cfg_apply_detadphi_ls && std::pow(deta / dielectroncuts.cfg_min_deta_ls, 2) + std::pow(dphi / dielectroncuts.cfg_min_dphi_ls, 2) < 1.f) {
map_pfb[pos1.globalIndex()] |= 1 << static_cast<int>(o2::aod::pwgem::dilepton::utils::pairutil::DileptonPrefilterBitDerived::kSplitOrMergedTrackLS);
Expand All @@ -440,9 +460,18 @@ struct prefilterDielectron {
float dphi = ele1.sign() * v1.Pt() > ele2.sign() * v2.Pt() ? v1.Phi() - v2.Phi() : v2.Phi() - v1.Phi();
o2::math_utils::bringToPMPi(dphi);

float phiPosition1 = ele1.phi() + std::asin(ele1.sign() * 0.30282 * (d_bz * 0.1) * dielectroncuts.cfgRefR / (2.f * ele1.pt()));
float phiPosition2 = ele2.phi() + std::asin(ele2.sign() * 0.30282 * (d_bz * 0.1) * dielectroncuts.cfgRefR / (2.f * ele2.pt()));

phiPosition1 = RecoDecay::constrainAngle(phiPosition1, 0, 1); // 0-2pi
phiPosition2 = RecoDecay::constrainAngle(phiPosition2, 0, 1); // 0-2pi
float dphiPosition = ele1.sign() * v1.Pt() > ele2.sign() * v2.Pt() ? phiPosition1 - phiPosition2 : phiPosition2 - phiPosition1;
o2::math_utils::bringToPMPi(dphiPosition);

fRegistry.fill(HIST("Pair/before/lsmm/hMvsPt"), v12.M(), v12.Pt());
fRegistry.fill(HIST("Pair/before/lsmm/hMvsPhiV"), phiv, v12.M());
fRegistry.fill(HIST("Pair/before/lsmm/hDeltaEtaDeltaPhi"), dphi, deta);
fRegistry.fill(HIST("Pair/before/lsmm/hDeltaEtaDeltaPhiPosition"), dphiPosition, deta);

if (dielectroncuts.cfg_apply_detadphi_ls && std::pow(deta / dielectroncuts.cfg_min_deta_ls, 2) + std::pow(dphi / dielectroncuts.cfg_min_dphi_ls, 2) < 1.f) {
map_pfb[ele1.globalIndex()] |= 1 << static_cast<int>(o2::aod::pwgem::dilepton::utils::pairutil::DileptonPrefilterBitDerived::kSplitOrMergedTrackLS);
Expand Down Expand Up @@ -487,9 +516,18 @@ struct prefilterDielectron {
float dphi = pos.sign() * v1.Pt() > ele.sign() * v2.Pt() ? v1.Phi() - v2.Phi() : v2.Phi() - v1.Phi();
o2::math_utils::bringToPMPi(dphi);

float phiPosition1 = pos.phi() + std::asin(pos.sign() * 0.30282 * (d_bz * 0.1) * dielectroncuts.cfgRefR / (2.f * pos.pt()));
float phiPosition2 = ele.phi() + std::asin(ele.sign() * 0.30282 * (d_bz * 0.1) * dielectroncuts.cfgRefR / (2.f * ele.pt()));

phiPosition1 = RecoDecay::constrainAngle(phiPosition1, 0, 1); // 0-2pi
phiPosition2 = RecoDecay::constrainAngle(phiPosition2, 0, 1); // 0-2pi
float dphiPosition = pos.sign() * v1.Pt() > ele.sign() * v2.Pt() ? phiPosition1 - phiPosition2 : phiPosition2 - phiPosition1;
o2::math_utils::bringToPMPi(dphiPosition);

fRegistry.fill(HIST("Pair/after/uls/hMvsPhiV"), phiv, v12.M());
fRegistry.fill(HIST("Pair/after/uls/hMvsPt"), v12.M(), v12.Pt());
fRegistry.fill(HIST("Pair/after/uls/hDeltaEtaDeltaPhi"), dphi, deta);
fRegistry.fill(HIST("Pair/after/uls/hDeltaEtaDeltaPhiPosition"), dphiPosition, deta);
}

for (auto& [pos1, pos2] : combinations(CombinationsStrictlyUpperIndexPolicy(posTracks_per_coll, posTracks_per_coll))) { // LS++
Expand All @@ -508,9 +546,18 @@ struct prefilterDielectron {
float dphi = pos1.sign() * v1.Pt() > pos2.sign() * v2.Pt() ? v1.Phi() - v2.Phi() : v2.Phi() - v1.Phi();
o2::math_utils::bringToPMPi(dphi);

float phiPosition1 = pos1.phi() + std::asin(pos1.sign() * 0.30282 * (d_bz * 0.1) * dielectroncuts.cfgRefR / (2.f * pos1.pt()));
float phiPosition2 = pos2.phi() + std::asin(pos2.sign() * 0.30282 * (d_bz * 0.1) * dielectroncuts.cfgRefR / (2.f * pos2.pt()));

phiPosition1 = RecoDecay::constrainAngle(phiPosition1, 0, 1); // 0-2pi
phiPosition2 = RecoDecay::constrainAngle(phiPosition2, 0, 1); // 0-2pi
float dphiPosition = pos1.sign() * v1.Pt() > pos2.sign() * v2.Pt() ? phiPosition1 - phiPosition2 : phiPosition2 - phiPosition1;
o2::math_utils::bringToPMPi(dphiPosition);

fRegistry.fill(HIST("Pair/after/lspp/hMvsPt"), v12.M(), v12.Pt());
fRegistry.fill(HIST("Pair/after/lspp/hMvsPhiV"), phiv, v12.M());
fRegistry.fill(HIST("Pair/after/lspp/hDeltaEtaDeltaPhi"), dphi, deta);
fRegistry.fill(HIST("Pair/after/lspp/hDeltaEtaDeltaPhiPosition"), dphiPosition, deta);
}

for (auto& [ele1, ele2] : combinations(CombinationsStrictlyUpperIndexPolicy(negTracks_per_coll, negTracks_per_coll))) { // LS--
Expand All @@ -529,9 +576,18 @@ struct prefilterDielectron {
float dphi = ele1.sign() * v1.Pt() > ele2.sign() * v2.Pt() ? v1.Phi() - v2.Phi() : v2.Phi() - v1.Phi();
o2::math_utils::bringToPMPi(dphi);

float phiPosition1 = ele1.phi() + std::asin(ele1.sign() * 0.30282 * (d_bz * 0.1) * dielectroncuts.cfgRefR / (2.f * ele1.pt()));
float phiPosition2 = ele2.phi() + std::asin(ele2.sign() * 0.30282 * (d_bz * 0.1) * dielectroncuts.cfgRefR / (2.f * ele2.pt()));

phiPosition1 = RecoDecay::constrainAngle(phiPosition1, 0, 1); // 0-2pi
phiPosition2 = RecoDecay::constrainAngle(phiPosition2, 0, 1); // 0-2pi
float dphiPosition = ele1.sign() * v1.Pt() > ele2.sign() * v2.Pt() ? phiPosition1 - phiPosition2 : phiPosition2 - phiPosition1;
o2::math_utils::bringToPMPi(dphiPosition);

fRegistry.fill(HIST("Pair/after/lsmm/hMvsPt"), v12.M(), v12.Pt());
fRegistry.fill(HIST("Pair/after/lsmm/hMvsPhiV"), phiv, v12.M());
fRegistry.fill(HIST("Pair/after/lsmm/hDeltaEtaDeltaPhi"), dphi, deta);
fRegistry.fill(HIST("Pair/after/lsmm/hDeltaEtaDeltaPhiPosition"), dphiPosition, deta);
}

} // end of collision loop
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