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Copy+calib strategy for trigger jet reconstruction

Teng Jian Khoo requested to merge khoo/athena:master-hlt-jet-copycalib into master

Addresses ATR-19187 to reduce the CPU and disk load of applying different calibrations to trigger jets.

Trigger jet reconstruction gains an additional stage for ungroomed jets where the jet collection is always built with no calibration. Sorting and filtering happen on the uncalibrated jets. Then, for any calibrated versions a shallow copy container is created, to which the calibration is applied.

The CPU and disk implications can be seen in this presentation by @chala.

Reduced the pt threshold for a4 jets to 5 GeV from 7 GeV. No changes to trigger refs except the following:

  • JetDS step 1 (j0) feature count increased
  • HT500 feature count increased
  • xe_mht event counts changed, but MET group is not monitoring these chains' counts (n.b. @jburr)

FYI @jbossios @valentem @peter

Edited by Teng Jian Khoo

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