[Recorded on 05.21.2019] Continuing on with our efficiency checks:

https://drupal.star.bnl.gov/STAR/blog/dmawxc/update-05172019-run-9-pp-checking-efficiency-when-using-different-nfit-cut-and-when-usin

Next we wanted to check how the "efficiency" changes when we use pTdet (i.e. the smeared pT) in the numerator. So the plotted ratio is

eff = f[pTdet] / f[pTpar]

Where f[pTdet] is the no. of reconstructed tracks as a function of detector-level pT, and f[pTpar] is the no. of generated tracks as a function of particle-level pT.

We compared this ratio to the efficiency Matt Cervantes used in his Thesis:

While the function plotted is the same (f[pTdet] / f[pTpar]), there are differences in the cuts used. Matt's efficiency was calculated using Nfit > 20, dca < 1 cm, and only using pi+-. Despite that, the two are fairly consistent with the biggest differences at the very low end.