NuGraph2 Integration

For general information, please examine NuGraph2 GNN event reconstruction

NuGraph2 model has been integrated in LArSoft release:

• v09_83_01
• It’s located in the larrecodnn/NuGraph package

New dependencies introduced for NuGraph:

• delaunator v0_4_0
• libtorch v2_1_1
• torch_scatter v2_1_2

The module responsible for running the GNN model is called NuGraphInference_module and performs the following 4 steps:

1. create Delaunay edges
2. fill input torch Tensors
3. collect inputs, run inference
4. get output, put into event

Recipe for Testing relies on the user having access to a trained model saved in a “model.pt” file.

• source /cvmfs/uboone.opensciencegrid.org/products/setup_uboone.sh
• setup uboonecode v09_83_01 -q e26:prof
• cp /path/to/model.pt .
• export FW_SEARCH_PATH=$FW_SEARCH_PATH:./
• lar -c testinference_uB_slice_job.fcl -n 1 –nskip 31 -s inputfile.root
• lar -c nugraph_analyzer.fcl -n -1 -s inputfile_*-testinference.root
• root -l NuGraphTree.root
• As input file you can use files from the MicroBooNE public dataset

For more details on integrating NuGraph GNN into LArSoft see: Integration of NuGraph GNN into LArSoft NuGraph All Hands Meeting