20200128-PREX2-Analysis

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Meeting room at JLab: Counting house conference room

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Agenda

Analysis projects

1. Devi: Q2 weighting [HAPLOG4013]
   • DM: he performed the analysis with the correct pedestal subtraction on the ADC weighting. It changed in the last digit. The variation is not very large and this sounds reasonable. ChG: I performed an independent x-check and got similar results.
   • KP: the last slides show the slices on Q2. The variation is small here as well.
   • DM: the right arm has bad pedestal subtraction so the uncertainty is considerbly larger. KP: we can use the left arm variation
2. Tao: Residual sensitivity [HAPLOG4014] [Plots by slug]
   • TY: the "+" in the dithering_slopes.pdf refers to being able to add the additional coils.
   • KP: the over constrained we expect to have a smaller residual.
   • KP: please label similar looking plots
   • TY: still trying to look at the information. Will need to think about it more.
   • TY: there are locations where we can see that the "other coils" provide signficant changes to the slopes because beam optics may have changed that shift sensitivities between coils. You can see that in the residuals in the "other" coils.
   • VO: we should probably stay with the blue (avg) for respin1 and we can look further to understand this over-constrainted. KP: is there a slug where there isn't enough data so the red is worse than blue?
   • TY: these are up on the webpage so everyone (Ye, Victoria) please look to understand it better. VO/YT: will do
3. Yufan: HAPLOG3998 HAPLOG4001
   • YC: re-worked the plots since last meeting;
   • YC: the "p0 and err" is RMS/sqrt(N)
   • KP: can you plot the analog DD and digital DD for the same dataset?
   • CC: a pull plot (on the average) should be useful for you determine the runs that have bad Aq per minirun;
   • KP: A global overivew of what data is cut is needed. YC: will do.

PREX Respin

1. Robert: respin update
   • PK: talked to Robert but we're slowly stepping through the runs. He's been sending things to the tape. Will update minutes when I get news from Robert about the status.

Present

• JLab:
  • Tao Y, Weibin Z, Victoria O, Jinlong Z, Cameron C, Iris H,
• Phone:
  • Adam Z, Amali P, Chandan G, Hanjie L, Rakitha B, Ryan R, Ye T, Yufan C, Dustin M, Kent P, Caryn P, Sakib R, Paul K, Eric K,

Excused

Devi A, Sanghwa P,