ROOT DST Files

Overview

The ROOT DST files are generated from the LCIO output of the reconstruction.  These files can be analyzed using the HpsEvent API in combination with the ROOT data analysis framework. 

The hps-dst project provides the DST Maker used to perform this conversion from LCIO to ROOT and also includes the HpsEvent API implementation.

Software Resources

Here are some useful links related to the DST software.

• DST Maker Installation Instructions
  
  
• HPS DST Project Homepage on github
  
  
• HPS DST Issue Tracker
  

DST Event Structure

The ROOT based DST's are composed of HpsEvent objects which are used to encapsulate collections (TClonesArray) of physics objects e.g. tracks and particles.  The collections encapsulated by an HpsEvent are shown on Table 1. 

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