tauRecTools: protect against Log10(0) in very rare cases

Hello,

This MR adds a protection against computing Log10(0) for very rare cases (10 taus in 15 million events, as observed in gamma* MC). It seems we can have "pathological" taus where clusters have FIRST_ENG_DENS = 0. This seems to happen when |eta|~1.5, when all the cluster energy is in the presampler. This MR does not change the reconstruction output except in very rare case, where xAOD::TauJetParameters::ClustersMeanFirstEngDens used to be -inf, and is now 0.

Cheers, Bertrand

This merge request affects 1 package:

• Reconstruction/tauRecTools

This merge request affects 1 file:

• Reconstruction/tauRecTools/Root/MvaTESVariableDecorator.cxx

Adding @goetz ,@martindl ,@adbailey ,@xiaozhon as watchers

added Reconstruction Tau master review-pending-level-1 labels

CI Result SUCCESS (hash f7833080)

	Athena	AthSimulation	AthGeneration	AnalysisBase	AthAnalysis
externals
cmake
make
required tests
optional tests

Full details available on this CI monitor view
Athena: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 0
AthGeneration: number of compilation errors 0, warnings 0
AnalysisBase: number of compilation errors 0, warnings 0
AthAnalysis: number of compilation errors 0, warnings 3
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 25773]

Looks good to me. Approving.

Serhat (L1)

added review-approved label and removed review-pending-level-1 label

merged

mentioned in commit 24f8a45b

added sweep:ignore label