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Develop PR: Add new fields to SRTruth/SRTrueInteractions to save meson production time + Assign generator type in CAFMaker #676

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Develop PR: Add new fields to SRTruth/SRTrueInteractions to save meson production time + Assign generator type in CAFMaker #676

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e563f78
Fill SRTrueInteraction.prod_time/dk2gen and tag rec.mc.nu.generator i…
VCLanNguyen Sep 29, 2026
28cb2b3
Fill MeVPrtl production-time from meson_dpos_beamcoord
VCLanNguyen Sep 29, 2026
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23 changes: 22 additions & 1 deletion sbncode/CAFMaker/CAFMaker_module.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -41,6 +41,7 @@
#endif

#include "ifdh_art/IFDHService/IFDH_service.h"
#include "dk2nu/tree/dk2nu.h"

// ROOT includes
#include "TFile.h"
Expand Down Expand Up @@ -1469,6 +1470,14 @@ void CAFMaker::produce(art::Event& evt) noexcept {
art::fill_ptr_vector(mcfluxes, mcflux_handle);
}

art::Handle<std::vector<bsim::Dk2Nu>> dk2nu_handle;
GetByLabelStrict(evt, std::string("generator"), dk2nu_handle);

std::vector<art::Ptr<bsim::Dk2Nu>> dk2nus;
if (dk2nu_handle.isValid()) {
art::fill_ptr_vector(dk2nus, dk2nu_handle);
}

// get the MCReco for the fake-reco
art::Handle<std::vector<sim::MCTrack>> mctrack_handle;
GetByLabelStrict(evt, std::string("mcreco"), mctrack_handle);
Expand Down Expand Up @@ -1552,9 +1561,13 @@ void CAFMaker::produce(art::Event& evt) noexcept {
// holder for invalid MCFlux
simb::MCFlux badflux; // default constructor gives nonsense values

// holder for invalid Dk2Nu (default-constructed ancestor vector is empty -- treated as "absent")
bsim::Dk2Nu baddk2nu;

for (size_t i=0; i<mctruths.size(); i++) {
auto const& mctruth = mctruths.at(i);
const simb::MCFlux &mcflux = (mcfluxes.size()) ? *mcfluxes.at(i) : badflux;
const bsim::Dk2Nu &dk2nu = (dk2nus.size()) ? *dk2nus.at(i) : baddk2nu;

simb::GTruth gtruth;
bool ok = GetAssociatedProduct(fmp_gtruth, i, gtruth);
Expand All @@ -1569,7 +1582,15 @@ void CAFMaker::produce(art::Event& evt) noexcept {

if ( !isRealData ){

FillTrueNeutrino(mctruth, mcflux, gtruth, true_particles, id_to_truehit_map, srtruthbranch.nu.back(), i, fActiveVolumes);
FillTrueNeutrino(mctruth, mcflux, dk2nu, gtruth, true_particles, id_to_truehit_map, srtruthbranch.nu.back(), i, fActiveVolumes);

if (ok) {
srtruthbranch.nu.back().generator = caf::kGENIE;
} else if (i < mevprtl_truths.size()) {
srtruthbranch.nu.back().generator = caf::kMeVPrtl;
} else {
srtruthbranch.nu.back().generator = caf::kUnknownGenerator;
}

srtruthbranch.nu.back().genie_evtrec_idx = fGenieEventCounter;

Expand Down
1 change: 1 addition & 0 deletions sbncode/CAFMaker/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -23,6 +23,7 @@ art_make_library( LIBRARY_NAME sbncode_CAFMaker
ROOT::EG
CLHEP::Random
caf_RecoUtils
dk2nu::Tree
lardataobj::AnalysisBase
lardataobj::RecoBase
lardataobj::Simulation
Expand Down
7 changes: 7 additions & 0 deletions sbncode/CAFMaker/FillTrue.cxx
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Original file line number Diff line number Diff line change
@@ -1,5 +1,7 @@
#include "FillTrue.h"

#include "dk2nu/tree/dk2nu.h"

#include "larcorealg/GeoAlgo/GeoAlgo.h"
#include "larcorealg/Geometry/GeometryCore.h"
#include "larcorealg/Geometry/WireReadoutGeom.h"
Expand Down Expand Up @@ -385,6 +387,7 @@ namespace caf {
srtruth.position.y = truth.decay_pos.Y();
srtruth.position.z = truth.decay_pos.Z();
srtruth.time = truth.decay_pos.T();
srtruth.prod_time = truth.meson_dpos_beamcoord.T(); //Meson time from flux file.

srtruth.momentum.x = truth.mevprtl_mom.X();
srtruth.momentum.y = truth.mevprtl_mom.Y();
Expand Down Expand Up @@ -457,6 +460,7 @@ namespace caf {
//------------------------------------------------
void FillTrueNeutrino(const art::Ptr<simb::MCTruth> mctruth,
const simb::MCFlux &mcflux,
const bsim::Dk2Nu &dk2nu,
const simb::GTruth& gtruth,
const std::vector<caf::SRTrueParticle> &srparticles,
const std::map<int, std::vector<art::Ptr<recob::Hit>>> &id_to_truehit_map,
Expand Down Expand Up @@ -549,6 +553,9 @@ namespace caf {
// Set the MCFlux stuff
srneutrino.initpdg = mcflux.fntype;
srneutrino.baseline = mcflux.fdk2gen + mcflux.fgen2vtx;
srneutrino.dk2gen = mcflux.fdk2gen;
srneutrino.prod_time = (!dk2nu.ancestor.empty())
? dk2nu.ancestor.back().startt : std::numeric_limits<float>::signaling_NaN();
srneutrino.parent_pdg = mcflux.fptype;
srneutrino.parent_dcy_mode = mcflux.fndecay;
srneutrino.prod_vtx.x = mcflux.fvx;
Expand Down
3 changes: 3 additions & 0 deletions sbncode/CAFMaker/FillTrue.h
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Original file line number Diff line number Diff line change
Expand Up @@ -33,6 +33,8 @@
#include "sbnanaobj/StandardRecord/StandardRecord.h"
#include "sbnanaobj/StandardRecord/SRMeVPrtl.h"

namespace bsim { class Dk2Nu; }

namespace caf
{
struct HitsEnergy {
Expand Down Expand Up @@ -86,6 +88,7 @@ namespace caf

void FillTrueNeutrino(const art::Ptr<simb::MCTruth> mctruth,
const simb::MCFlux &mcflux,
const bsim::Dk2Nu &dk2nu,
const simb::GTruth& gtruth,
const std::vector<caf::SRTrueParticle> &srparticles,
const std::map<int, std::vector<art::Ptr<recob::Hit>>> &id_to_truehit_map,
Expand Down
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