sPHENIX tracking discussion

[Michael Joseph Peters <mjpeters AT mit.edu>]

Hi all,

Yesterday I showed that the propagator was finally beginning to do more good than harm for some tracks, but at the time it still wasn't a uniform improvement. Since then, I believe I've finally found a propagator design that works; tuning is in progress, but here are the results so far:

The efficiency is now a little bit under 90% above 2 GeV (whereas with CA seeding alone it was around 80%). As for nhits:

There are a lot more tracks produced overall (the tuning is currently pretty inclusive right now, which exacerbates this), and the secondary peak at intermediate nhits is now gone. I'll continue working on optimizing the propagator, but it seems I've finally hit on a workable design.

Thanks,

Michael Peters