[Recorded on 02.19.2019] The post below shows that our approximation of the run 9 response is wrong.

https://drupal.star.bnl.gov/STAR/blog/dmawxc/update-01072019-run-9-pp-detector-level-pythia-vs-embedding-vs-data-jet-spectra

The question now becomes: why? As a check, the plots below compare our Pythia8 spectrum with some adjustments. One turns off the pT smearing on the Pythia8 spectrum, and the other adjusts the efficiency (pushing it up a few %).

Turning off the smearing does nothing to help (which is expected since this is such a small effect), but it also looks like a higher efficiency doesn't help... This could be due to the shape of the tracking efficiency rather than the overall level... The tracking efficiency I've been using can be found here:

https://drupal.star.bnl.gov/STAR/blog/dmawxc/update-04112018-run-9-pp-efficiency-different-binning-0

However, since the efficiency is the one (and presumably only) effect that really affects the detector-level Pythia8 spectrum, it's our best line of inquiry...