HF-PWG minutes 2017/12/14

1) J/psi polarization using Run15 MTD data - Zhen Liu
a. 24 variations are tried for the J/psi polarization measurement, and the average polarization parameters of the 24 variations are taken as the default, while the RMS's are taken as the uncertainties. Furthermore, the average statistical errors of the 24 variations are taken as the statistical errors on the central values. 
b. A PWGC preview will be requested by Petr, in which Zhen's and Siwei's analyses will be reviewed together.