May 3, 2019 - PrimEx-Eta Meeting

Time and Place

• Time: Friday, May 3, 2019 2:00 pm EST.
• Room: CEBAF Center, Room F227

Meeting Connections

1. If joining via web browser, go to [1] https://jlab.bluejeans.com/7572695553/
2. If joining via phone, use one of the following numbers and the Conference ID: 7572695553.
   • US or Canada: +1 408 740 7256 or
   • US or Canada: +1 888 240 2560
3. If joining via Polycom room system go to the IP Address: 199.48.152.152 (bjn.vc) and enter the meeting ID: 7572695553.

Slides

Accidentals in Compton reconstruction

Primakoff Yields and Eta Angular Distribution

Minutes

1. Eta distributions
   1. Drew's slides with eta yields and angular distribution: eta_yield_slides_05_03_19.pdf
   2. Next week, will provide more detailed plots with progression of individual cuts and their impacts on the distribution.
   3. The angular distributions still need to have accidental and empty target subtractions applied.
2. CompCal Calibrations
   1. Sasha showed that the CompCal energies from reconstructed compton events are shifted by up to 200 MeV. We will need to develop a procedure for calibration.
   2. Potentially we can use compton events for energy calibrations in addition to the snake scans.