Home

Welcome to the gluex_root_analysis wiki! This is a documentation for usage of the DSelector and gluex_root_analysis, along with examples of analysis code. The original LaTeX source is kept on Overleaf, authored by Alexander Austregesilo, Sean Dobbs, Beni Zihlmann, and others in the GlueX Collaboration.

For HOW-TO on downloading, building and enviroment setup, please check GlueX wiki.

---The GlueX Software Group

---

Table of Content

• Home
• Introduction
• The DSelector class structure
  • The Header File
  • How to Run the DSelector
  • The Wrapper concept
  • Init(TTree *locTree) Method
    • Histogram definitions
  • Analysis Actions
    • Histogram Actions
    • Cut Actions
    • Analyze Cut Actions
    • KinFit Comparison between different reactions
    • Analysis Utilities
  • Process(Long64_t locEntry) Method
    • Dealing with Combinatorics Background
    • Pre-sorting combos using Kinfit $\chi^2$
    • Looping over combos in an event
    • Handling Accidental Beam Photon Contributions
    • Histogram Filling with Uniqueness Tracking
    • Kinematic Fit Quality
    • Long-Lived Particles
    • Analyzing Thrown Information
  • ROOT Tree Output
  • DSelector Data Classes
    • Variable names prefixes and suffixes
    • DBeamParticle.h
    • DChargedTrackHypothesis.h
    • DNeutralParticleHypothesis.h
    • DParticleCombo.h
    • DParticleComboStep.h