HF PWG Meeting Minutes by Zhenyu - 2016/03/10

1) Updates of Upsilon in UU 193 GeV (already in GPC) - Robert
Robert reported the changes to the analysis that have been made during the GPC review, including switching from a bin-counting method to a likelihood-fitting method to extract Upsilon yields. With the fitting method, the correlations among the yields of different Upsilon states are taken into account and propated into RAA uncertainties. He has also switched from arithmetic mean to geometric mean to estimate combinatorial background. In order to get the correlation matrix calculation converge, he has to use different background paramaterizations to fit the data to get the pT-dependence and Npart-dependence of RAA. But the difference of the central values with different paramaeterizations are taken into account as systematic uncertainties.