View source for GEn Analysis Meeting November 13 2023 1030AM EST

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=Agenda=
# [Sean Jeffas] GEn-II analysis - [https://sbs.jlab.org/cgi-bin/DocDB/private/ShowDocument?docid=464 big picture overview]
# [Hunter Presley] PolHe3 target polarimetry - [https://sbs.jlab.org/cgi-bin/DocDB/private/ShowDocument?docid=463 current status and next steps]

=Attendance=
Arun, Sean, Gordon, Andrew, Anil, Bogdan, Chandan, David Armstrong, Faraz, Gary, Hunter, Jack Jackson, Kate, Jimmy, Jiwan, Mark Jones, Michael Kohl, Nilanga, Ole, Provakar, Saru, Todd, Xiaochao

=Minutes=
Sean's Talk:
* What do we need the GRINCH for in GEn?
** particle ID
** We need to generate timing offsets to properly use it, but track-matching is done (thanks to Maria)
* Add Wein flip check to beam IHWP state -> already implemented
* We may need to weight different run groups separately for asymmetry - Andrew
** Predict asymmetry on an event-by-event basis? - Bogdan
** You could also combine PbPt using run-by-run statistics to get an overall PbPt, and add raw counts of all runs together instead of assigning weights to each run - Xiaochao
** More discussion later

Hunter's Talk:
* 3% uncertainty in calibration of NMRs is dependent on using the standard error
* Chicago was in beam after Fringe -> 3/9/23-3/12/23
* Apply polarization to EACH run?
** All events within a run have the same polarization
** Might use something like a spin-up curve to estimate polarizations during non-steady running
** Define polarization as a function of time? Instead of using runs, define fit for polarization vs. time
*** How does this fit change in time?
*** Take care in evolving polarization properly and using proper uncertainty (time-dependent uncertainty?)
* We should create documentation for polarization work.

Side Notes and Offline Discussion:
* We need to define an approval procedure for different calibration methods.
* Andrew: rough estimate average of 100 (e,e'n) events per production run during highest Q^2 kinematics
* What are talks that people want to see for future analysis meetings?

=Meeting link information=

See email invitation, or contact Arun Tadepalli for Zoom link.