The first preliminary calibration, using HFT only, found (x₀,y₀) = (0.01, -0.24), using a production of data from run 16048027. The HFT cannot, however, determine a beam tilt. Using the same data, with TPC-found primary vertices, I find similar (x₀,y₀) = (0.002 ± 0.003, -0.259 ± 0.003), which is only different by ~1/5^th of a mm. I find slopes of dx/dz = -0.00040 ± 0.00007, and dy/dz = 0.00045 ± 0.00007. As I did for the pAu preliminary calibration, I will use the HFT-found intercepts, and the TPC-found slopes.


-Gene