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New topo-cluster moment & data size reduction for forward topo-towers

Peter Loch requested to merge loch/athena:newClusterMoment into master

New topo-cluster moment:

  • implemented the second moment of the cell time distribution in a topo-cluster for additional signal characterization;
  • moment SECOND_TIME is added to xAOD output item list for the CaloCalTopoClusters container;

Disc space reduction for the CaloCalFwdTopoTowers container:

  • the vector of sampling energies is cleared for each forward topo-tower;
  • additional non-trivial data members like the nominal tower bin center are set to 0;
  • the number of reconstructed moments attached to each forward tower is reduced to three (LONGITUDINAL, ENG_FRAC_EM, SIGNIFICANCE) plus two moments indicating bad cell contributions;

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