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Update of KLFitter to v1.2.1

Knut Zoch requested to merge kzoch/atlasexternals:klf-update into 1.0

After discovering (and fixing) two bugs in the code, the KLFitter version was updated to v1.2.1. The two bugs were:

  • Function to set prior probability to 0 was removed by accident. This lead to a few events having different output w.r.t. the previous version.
  • Crash of the all-hadronic likelihood during invariant permutation removal due to dangling reference.

I did a full local build of AnalysisBaseExternals and did not see any problems. The the bugfixes were validated by cross-checking the KLFitter output of v1.2.1 with respect to v1.0.0 (with no differences seen).

Edited by Knut Zoch

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