[Recorded on 05.14.2019] Now, we finally determined that the detector response differs between our standalone Pythia8 simulation and the official STAR Run 9 Pythia6 simulation:

https://drupal.star.bnl.gov/STAR/blog/dmawxc/update-04182019-run-9-pp-correct-pythia6-vs-pythia8-track-comparisons-particle-detector-
https://drupal.star.bnl.gov/STAR/blog/dmawxc/update-04242019-run-9-pp-correct-jet-comparisons-between-pythia6-and-pythia8

Most likely, because I wasn't calculating the tracking efficiency correctly (the results of this calculation go in our Pythia8 simulation). So I grabbed the detector-to-particle ratio from the Pythia6 (pi0-trigger) and used that as the de-facto "tracking efficiency" in the Pythia8 simulation. Now, by design, the detector-to-particle ratios between Pythia8 and Pythia6 should be (within errors) close to identical.

The track distributions I'll show in another post soon, but here are the jets.