All my notes on xAODs.

ABTutorial: a good overview to start with.

Keep updating!

CombinedPerformance tool: summary of CP tools

GoodRunList: to check for the newest grl for your data processing, pile up reweighting, etc.


All Release Twiki: list of recent releases.

Use acmSetup: Will Buttinger developed the tool for setting up release quickly.


xAOD code: gitlab link that cache xAOD code, used as class reference

AthAnalysisBase: Will's intro to Athena analysis base

AthenaCodeSnippets: Some of Will's experience about the coding in athena


Sample Handler: a quick and easy way to manage all your datasets and their associated information.


Pandabook: to look up your grid jobs.


  1. 20180103: rel 21.2.13 Event/xAOD/xAODTracking/Root/TrackParticlexAODHelpers.cxx can have "TrackParticle with zero or negative d0 uncertainty." error.

    Solution: Try to catch that, set the d0sig for the muon to be -999, default value.
    Reason: if you require at least the lowest muon quality, this error will not appear. So retrieve d0sig for muons at certain WP.

-- RongkunWang - 2017-11-20

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