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This is the basic recipe for reconstructing HPS data:

1.  EVIO data files are read in and converted to LCIO events.
2. The HPS Java reconstruction is run to add physics object collections to the events.
3. The events are written to an LCIO file containing results of the recon.
4. The recon LCIO file can be converted to ROOT DST Data Format.

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The default builder will also convert and write DAQ config   information, EPICS data, and scaler bank data into the output LCSim events, if these banks are present in the EVIO data.

TODO: put list of collections created by the converter

Track Reconstruction

These are the steps in the HPS Java track reconstruction:

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The tracking packages in lcsim form the basis for HPS's tracking algorithms through usage and extension.  Seed Tracker is used for track finding using a set of input tracking strategies.  The track fit from lcsim is further refined using a Java implementation (port) of the GBL C++ algorithm. 

TODO: put list of tracking input/output collections here

ECal Reconstruction

These are the basic steps of the ECal reconstruction:

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The copied collection will be updated with corrected energies in the next step which creates recon particles.TODO: put list of ECal recon input/output collections here

Reconstructed Particles

The ReconParticleDriver creates ReconstructedParticle objects representing the final state particles from the event reconstruction.  These are tracks with matching clusters (when applicable).  It also performs vertex reconstruction and creates a number of candidate particle collections.

The ReconParticleDriver is sub-classed by the actual HpsReconParticleDriver from the steering which adds Moller candidate collections.TODO: put list of recon particle input/output collections here

Data Collections

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