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Merged
iarsene merged 1 commit into from
Apr 8, 2025
Merged

[Common] update fwdtrackPropagation.cxx #10773

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92 changes: 8 additions & 84 deletions Common/TableProducer/fwdtrackPropagation.cxx
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Original file line number Diff line number Diff line change
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// Copyright 2019-2020 CERN and copyright holders of ALICE O2.
// See https://alice-o2.web.cern.ch/copyright for details of the copyright holders.
// All rights not expressly granted are reserved.
Expand All @@ -13,7 +13,7 @@
/// \brief Common task to produce propagated forward tracks
/// \author Maurice Coquet <maurice.louis.coquet@cern.ch>
/// \author Luca Micheletti <luca.micheletti@cern.ch>
/// \author Daiki Sekihata <daiki.sekihata@cern.ch>

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[doc/file] 

Documentation for \file is missing, incorrect or misplaced.

#include <string>
#include <map>
Expand Down Expand Up @@ -70,14 +70,11 @@
Configurable<float> maxPDCAforSmallR{"maxPDCAforSmallR", 594.f, "max. pDCA for small R at absorber end"};
Configurable<float> maxMatchingChi2MCHMFT{"maxMatchingChi2MCHMFT", 50.f, "max. chi2 for MCH-MFT matching"};
Configurable<float> maxChi2SA{"maxChi2SA", 1e+6, "max. chi2 for standalone muon"};
Configurable<float> maxChi2GL{"maxChi2GL", 1e+6, "max. chi2 for global muon"};
Configurable<float> maxChi2GL{"maxChi2GL", 50.f, "max. chi2 for global muon"};
Configurable<bool> refitGlobalMuon{"refitGlobalMuon", true, "flag to refit global muon"};
Configurable<bool> applyDEtaDPhi{"cfgApplyDEtaDPhi", false, "flag to apply deta-dphi elliptic cut"};
Configurable<float> minDEta{"minDEta", 0.1, "min deta between MFT-MCH-MID and its attached MID-MCH at PV"};
Configurable<float> minDPhi{"minDPhi", 0.1, "min dphi between MFT-MCH-MID and its attached MID-MCH at PV"};

HistogramRegistry fRegistry{"fRegistry"};
static constexpr std::string_view muon_types[5] = {"MFTMCHMID/", "MFTMCHMIDOtherMatch/", "MFTMCH/", "MCHMID/", "MCH/"};

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void init(o2::framework::InitContext&)
{
Expand Down Expand Up @@ -130,8 +127,8 @@

fRegistry.add("MFTMCHMID/hPt", "pT;p_{T} (GeV/c)", kTH1F, {{100, 0.0f, 10}}, false);
fRegistry.add("MFTMCHMID/hRelDiffPt", "pT resolution;p_{T} (GeV/c);#Deltap_{T}/p_{T}", kTH2F, {{100, 0.0f, 10}, {200, 0, 0.2}}, false);
fRegistry.add("MFTMCHMID/hEtaPhi", "#eta vs. #varphi;#varphi (rad.);#eta", kTH2F, {{180, 0, 2 * M_PI}, {60, -5.f, -2.f}}, false);

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[external-pi] 

Use the PI constant (and its multiples and fractions) defined in o2::constants::math.
fRegistry.add("MFTMCHMID/hEtaPhi_MatchedMCHMID", "#eta vs. #varphi;#varphi (rad.);#eta", kTH2F, {{180, 0, 2 * M_PI}, {60, -5.f, -2.f}}, false);

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[external-pi] 

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fRegistry.add("MFTMCHMID/hDiffCollId", "difference in collision index;collisionId_{TTCA} - collisionId_{MP}", kTH1F, {{41, -20.5, +20.5}}, false);
fRegistry.add("MFTMCHMID/hSign", "sign;sign", kTH1F, {{3, -1.5, +1.5}}, false);
fRegistry.add("MFTMCHMID/hNclusters", "Nclusters;Nclusters", kTH1F, {{21, -0.5f, 20.5}}, false);
Expand Down Expand Up @@ -193,89 +190,16 @@
return true;
}

template <typename TFwdTracks, typename TMFTTracks, typename TCollision, typename TTarget, typename TCandidates>
bool isBestMatch(TCollision const& collision, TTarget const& target, TCandidates const& candidates)
template <typename TCollision, typename TFwdTrack, typename TFwdTracks, typename TMFTTracks>
void fillFwdTrackTable(TCollision const& collision, TFwdTrack fwdtrack, TFwdTracks const&, TMFTTracks const&, const bool isAmbiguous)
{
std::map<int64_t, float> map_chi2MFTMCH;
for (const auto& matchedtrack : candidates) { // MFT-MCH-MID or MFT-MCH
if (matchedtrack.trackType() != o2::aod::fwdtrack::ForwardTrackTypeEnum::GlobalMuonTrack) {
continue;
}
o2::dataformats::GlobalFwdTrack propmuonAtPV = propagateMuon(matchedtrack, collision, propagationPoint::kToVertex);
float eta = propmuonAtPV.getEta();
float phi = propmuonAtPV.getPhi();
if (refitGlobalMuon) {
const auto& mfttrack = matchedtrack.template matchMFTTrack_as<TMFTTracks>();
eta = mfttrack.eta();
phi = mfttrack.phi();
}
o2::math_utils::bringTo02Pi(phi);
if (eta < minEtaGL || maxEtaGL < eta) {
continue;
}

const auto& mchtrack = matchedtrack.template matchMCHTrack_as<TFwdTracks>(); // MCH-MID
o2::dataformats::GlobalFwdTrack propmuonAtPV_Matched = propagateMuon(mchtrack, collision, propagationPoint::kToVertex);
float etaMatchedMCHMID = propmuonAtPV_Matched.getEta();
float phiMatchedMCHMID = propmuonAtPV_Matched.getPhi();
o2::math_utils::bringTo02Pi(phiMatchedMCHMID);

float deta = etaMatchedMCHMID - eta;
float dphi = phiMatchedMCHMID - phi;
o2::math_utils::bringToPMPi(dphi);
if (applyDEtaDPhi && std::sqrt(std::pow(deta / minDEta, 2) + std::pow(dphi / minDPhi, 2)) > 1.f) {
continue;
}

if (matchedtrack.chi2() < 0.f || maxChi2GL < matchedtrack.chi2()) {
continue;
}

float rAtAbsorberEnd = matchedtrack.rAtAbsorberEnd(); // this works only for GlobalMuonTrack
if (rAtAbsorberEnd < minRabsGL || maxRabs < rAtAbsorberEnd) {
continue;
}
o2::dataformats::GlobalFwdTrack propmuonAtDCA = propagateMuon(matchedtrack, collision, propagationPoint::kToDCA);
float dcaX = propmuonAtDCA.getX() - collision.posX();
float dcaY = propmuonAtDCA.getY() - collision.posY();
float dcaXY = std::sqrt(dcaX * dcaX + dcaY * dcaY);
if (maxDCAxy < dcaXY) {
continue;
}

o2::dataformats::GlobalFwdTrack propmuonAtDCA_Matched = propagateMuon(mchtrack, collision, propagationPoint::kToDCA);
float dcaX_Matched = propmuonAtDCA_Matched.getX() - collision.posX();
float dcaY_Matched = propmuonAtDCA_Matched.getY() - collision.posY();
float dcaXY_Matched = std::sqrt(dcaX_Matched * dcaX_Matched + dcaY_Matched * dcaY_Matched);
float pDCA = mchtrack.p() * dcaXY_Matched;

if (rAtAbsorberEnd < midRabs ? pDCA > maxPDCAforSmallR : pDCA > maxPDCAforLargeR) {
continue;
}

map_chi2MFTMCH[matchedtrack.globalIndex()] = matchedtrack.chi2MatchMCHMFT();
}
if (map_chi2MFTMCH.begin()->first != target.globalIndex()) { // search for minimum matching chi2
map_chi2MFTMCH.clear();
return false;
}
map_chi2MFTMCH.clear();
if (fwdtrack.trackType() == o2::aod::fwdtrack::ForwardTrackTypeEnum::GlobalMuonTrack && (fwdtrack.chi2MatchMCHMFT() > maxMatchingChi2MCHMFT || fwdtrack.chi2() > maxChi2GL)) {
return;
} // Users have to decide the best match between MFT and MCH-MID at analysis level. The same global muon is repeatedly stored.

if (target.chi2MatchMCHMFT() > maxMatchingChi2MCHMFT) {
return false;
if (fwdtrack.chi2MatchMCHMID() < 0.f) { // this should never happen. only for protection.
return;
}
return true;
}

template <typename TCollision, typename TFwdTrack, typename TFwdTracks, typename TMFTTracks>
void fillFwdTrackTable(TCollision const& collision, TFwdTrack fwdtrack, TFwdTracks const& fwdtracks, TMFTTracks const&, const bool isAmbiguous)
{
if (fwdtrack.trackType() == o2::aod::fwdtrack::ForwardTrackTypeEnum::GlobalMuonTrack) {
const auto& matchedGlobalTracks = fwdtracks.sliceBy(perMFTTrack, fwdtrack.matchMFTTrackId()); // MFT-MCH-MID or MFT-MCH
if (!isBestMatch<TFwdTracks, TMFTTracks>(collision, fwdtrack, matchedGlobalTracks)) {
return;
}
} // find the best match between MFT and MCH-MID

o2::dataformats::GlobalFwdTrack propmuonAtPV = propagateMuon(fwdtrack, collision, propagationPoint::kToVertex);
o2::dataformats::GlobalFwdTrack propmuonAtDCA = propagateMuon(fwdtrack, collision, propagationPoint::kToDCA);
Expand All @@ -297,7 +221,7 @@

float dFdx = 2.f * dcaX / dcaXY;
float dFdy = 2.f * dcaY / dcaXY;
float sigma_dcaXY = std::sqrt(cXXatDCA * dFdx * dFdx + cYYatDCA * dFdy * dFdy + 2.f * cXYatDCA * dFdx * dFdy);

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float pDCA = fwdtrack.p() * dcaXY;
int nClustersMFT = 0;
Expand All @@ -311,11 +235,11 @@

if (fwdtrack.trackType() == o2::aod::fwdtrack::ForwardTrackTypeEnum::GlobalMuonTrack) {
const auto& mchtrack = fwdtrack.template matchMCHTrack_as<TFwdTracks>(); // MCH-MID
o2::dataformats::GlobalFwdTrack propmuonAtPV_Matched = propagateMuon(mchtrack, collision, propagationPoint::kToVertex);

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etaMatchedMCHMID = propmuonAtPV_Matched.getEta();
phiMatchedMCHMID = propmuonAtPV_Matched.getPhi();
o2::math_utils::bringTo02Pi(phiMatchedMCHMID);
o2::dataformats::GlobalFwdTrack propmuonAtDCA_Matched = propagateMuon(mchtrack, collision, propagationPoint::kToDCA);

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float dcaX_Matched = propmuonAtDCA_Matched.getX() - collision.posX();
float dcaY_Matched = propmuonAtDCA_Matched.getY() - collision.posY();
float dcaXY_Matched = std::sqrt(dcaX_Matched * dcaX_Matched + dcaY_Matched * dcaY_Matched);
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