Aprime to EE Additional MC Gen Info (supersedes !3431)

Adds additional information from generator level to use in efficiency and background studies for the \pi^0/\eta \to e^+ e^- \gamma dark photon/true muonium analysis.

For reviewers, major changes are:

• Ntuple.py
  • Lines 197-203: define branches for new gen level info
  • Lines 693-705: removed most of the old stored gen level info
  • Lines 760-772 and 880-892: store/index truth-matched daughters
  • Lines 948-1106 and 1115-1120: methods for filling gen level info
  • Lines 1181-1211: logic for determining if a gen level \pi^0/\eta is signal
• MCEventTools.py
  • Lines 754-788: new method for truth-matching a generic input particle
• prescale_0.01.py and prescale_1.py
  • New options files for prescale for blinding data
• job.py
  • Lines 72-81: logic for setting prescale
  • Lines 119 and 133-134: seed random number generator for prescale
  • Lines 183-184: apply prescale

Instructions

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