20200214-PREX2-Analysis

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Logistic information

Meeting room at JLab: CC F324-325

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Agenda

Analysis projects

1. Yufan : Double Difference of BCM [HAPLOG]
   • YC: Apply cuts on main detector RMS, three runs have large RMS
   • TY: Run 3561 is a single arm run and blinder fails a few events and causes large RMS.
   • KP: Analog BCMs look good seperatly, how can double-difference between them is bad? YC: will think about it.
   • KP: looks like digtial downstream BCM breaks most of double differences.
   • YC: average error bar looks better after cut. KP: what is the average of dd error ? YC: just averaging over error.
   • YC: seperate data set for digital BCM using the same receiver.
   • YC: in table without dgcut, avg is average from p0-fit with error bars
   • CP: You should take out the DOF in your averages weighting
   • YC: I didn't use Draw command for weighted. KP: where did you put weighting? YC: I used TGraph
   • KP: You have to show the data or plot. The formula is incorrect. TGraph seems to miss proper weighting.
2. Devika : BPM resolution from regression [HAPLOG]
   • DP: I used the regression rms and slopes to solve resolution.
   • KP: You should use the covariance from different BPMs. Lets discuss it offline
   • CP: cavity BPM resolution might be off-scale, we don't know the calibration scale yet.
   • KP: I would interpolate 4c from 4a and 4e for BPM scale calibration.
3. Tao:
   • partial respin statistics, comparing corrected from dithering and regression [HAPLOG]
   • TY: 1) check rootfiles output with runlist; 2) Needs to fix dithering corrector maps
   • KP: We need to think about other BPM for corrections
   • KP: How many runs are missing?
   • RR: Almost complete. We are putting them into tape. Some rootfiles disappeared in volatile
   • RR: If you want to update event cuts, we should wait.
   • KP: We should go through these plots at some point.
   • KP: for Null asymmetry, you should balance slugs for IN/OUT state, but for grand averaging, you should include all the slugs; TY: I will update pitts definition.

PREX Respin

1. Robert: respin update

Present

• JLab: Tao Y, Weibin Z, Ryan R
• Phone: Cameron C, Caryn P, Devi A, Devika B, Iris H, Kent P, Victoria O, Yufan C. Silviu CD, Robert R, Amali P