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Time parameter in xAOD::TrackParticle

David Richard Shope requested to merge atlas-hgtd/athena:TrackParticle-time-deco into master

Up until now, the output of HGTD reconstruction has been a collection of xAOD::TrackParticle decorations conveying the HGTD timing information (with track and vertex times being derived from them post-reco). This MR is a first step towards a more integrated track time in the xAOD EDM.

The topic was discussed in a core software meeting, where a preliminary strategy was proposed to add the time as dynamic for now. This should make it relatively transparent for Run 3 code, but usable for upgrade code (in which case the time will still need to be set on every track).

/cc @akraszna @npetters @tadej @tstreble @ncalace @pagessin @lgagnon @aleopold

Edited by David Richard Shope

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