Spin correlation mixed-event background

Single-particle effects can be seen in the ratio plots. It's unclear to me why this is. This is for the 01/23/19 BulkCorr meeting

The subject matter for this talk and some additional details were discussed in the 10/17/18 BulkCorr meeting, the talk for that can be found here drupal.star.bnl.gov/STAR/blog/iupsal/bulkcorr-spin-spin-correlation