Kaonlt-Pionlt Meeting Notes

Date: 2024-12-12
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Attendees:

- Regina - Alicia Postuma, Nacer Hamdi, Vijay Kumar
- JLab - Dave Gaskell
- CUA - Tanja Horn, Casey Morean
- Virginia - Richard Trotta
- Ohio - Julie Roche
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Discussion Points:


Vijay

- Cache Issues:
	- Read-only access for changes to the cache is causing problems.
	- Recommended procedure:
		1. Use jput to move data to tape.
		2. Use jget to retrieve data to cache.
		- Relevant Python code: GitHub Link.
			- Note: Code needs jget addition for full functionality.
	- Vijay will update file paths to address these changes.
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Nacer

- HeeP Singles Analysis Update:
	- Incorporated corrections for dummy target subtraction, charge normalization, etc.
	- Dave's Comments on Analysis:
		- Avoid applying cuts to ytar; SIMC cannot perfectly match.
		- A potential real ztar offset may explain discrepancies in ytar plots.
	- SHMS 10.6 GeV:
		- Like Nacer, Dave observed a consistent -5% discrepancy in HMS 2022 data, which required an ad hoc 1.5 mrad angle offset for correction.
		- Currently investigating similar SHMS 2022 data.
	- Suggestions for improving ratios (2-3% target range):
		1. Combine a small angle offset (~0.5 mrad) with improved boiling corrections.
		2. Test boiling corrections using Dave Mack's scaler studies (~2.5% boiling effect from online runs).
		3. Review boiling data from Dave's compiled Excel sheet. 
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Alicia

- GEANT Update:
	- SHMS detectors, including windows and trays, implemented in simulations.
	- Simulations now functional for selected particles.
	- Next Steps:
		- Enhance GEANT simulation further.
		- Integrate real kinematics.
- Referee Comments:
	- Working on addressing reviewer feedback.
	- Updating formatting before resubmitting to the collaboration for review.
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Richard

- t-range: Adjusted from 0.15-0.6 to 0.16-0.6.
- Binning Scheme: Changed to 5 bins in t and 10 bins in phi. Increased the number of events per bin.
	- Outcome: Significant reduction in pion leakage for the lowest t-bin.
- Upper t-range: Need to reduced from 0.6 to 0.5 to address high-background issues in the highest t-bin.
- Functional Forms: Now adjusting L and LT terms, in addition to T and TT terms.
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Announcements:

- Dave and Julia will not attend next week's meeting due to Holidays. The meeting may be smaller.