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Update PFA reclustering parameters & correct PFO energy with mass hypothesis

guofangyi@ihep.ac.cn requested to merge guofangyi/cepcsw-release:calorec into master

Update PFA reclustering parameters & correct PFO energy with mass hypothesis

Parameters optimized by Yang:

  • Neutral cluster merge angle: 0.20 -> 0.18
  • Virtual cluster merge angle: 0.24 -> 0.20.
  • BMR: 3.82%->3.78%

PFO energy: PFO 4-momentum is not kept consistent internally in EDM4HEP. So re-calculated PFO energy with pion mass hypothesis. This update has minor impact on BMR.

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