During the development of the reconstruction, there are more branches enabled here than are strictly necessary (e.g. simulated and digitized hits, intermediate reconstruction parameters). These are all available for analysis (with fixed interfaces). In this tutorial we will focus on a few branches in particular:
- ReconstructedParticles: contains the results from track finding and fitting,
- EcalBarrelClusters: contains the results from the barrel Ecal cluster finding,
- EcalBarrelScFiClusters: contains the results from the barrel Ecal ScFi cluster finding.
We can inspect each of these three branches in more detail (some information removed for formatting)
The ReconstructedParticles branch contains the momentum, e.g. `ReconstructedParticles.p.x` for the x-component, and references to other entities related to this particle (clusters, tracks, particles).
Note: Due to conditions that are currently being addressed, some momentum vectors use `p.x` whereas others use `p.px`.
## Analysis of full simulation reconstruction output with traditional ROOT commands
After opening the reconstruction output file, let's make some pretty plots. We start with:
These types of plots will likely be limited to simple data inspection.
## Analysis of full simulation reconstruction output with RDataFrame commands
For a more advanced analysis, you can take advantage of the RDataFrame features, such as in this (shortened) DIS example. The [original](https://eicweb.phy.anl.gov/EIC/benchmarks/physics_benchmarks/-/blob/master/benchmarks/dis/analysis/dis_electrons.cxx) is used in our CI system and determines DIS parameters for every change to the detector geometry, simulation, digitization, or reconstruction.
```console
auto momenta_from_reconstruction(const std::vector<eic::ReconstructedParticleData>& parts){
