Dec 19/24 PionLT/KaonLT Analysis Meeting Notes
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                                (Notes by GH)

                     Today: KaonLT will be discussed first

Present
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Regina - Garth Huber, Nathan Heinrich, Ali Usman, Nacer Hamdi, Vijay Kumar
JLab - Dave Gaskell
CUA - Tanja Horn
Virginia - Richard Trotta
FIU - Pete Markowitz

Vijay
-----
Setting up for Q2=0.42 L/T-separations
- setting up the analysis code, most things done
  - keeping the code in different places for Q2=0.38, 0.42
  - not yet pushed to GitHub 
    https://github.com/vijay253/lt_analysis/tree/winter_2023

- most data replayed, had timeout error for some runs, submitting jobs for
  these by hand

Richard
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Q2=3.0, W=3.14, SHMS center only LT-separations
- Data/MC ratios now closer to 1, but oscillations between 0.7-1.3

- made changes to iteration script
  - not dividing out the W-dependence, fitting full yield including W-dep
  - Bill (and GH pi- analysis) had divided out the W-dependence to reduce the
    dynamic range of the yields, so iterations would be more stable
  - with the W-dependence in, now hitting more local min/max in chi-square
    optimization, makes iteration process more complicated

- GH; do you fix any parameters and fit a smaller set (i.e. for sigT fix p7-p9
  and fit just p5-p6, then after p5-p6 optimized go back and fit p7-p9 in an
  repetitive process?)
  - Richard: no, but can do this going forward

- L,T,LT seem to have correct functional form now, still trying to find a good
  function for TT

- pi+ contamination in lowest t-bin has been corrected
  - sigT still has steep rise at lowest t-bin, but not as steep as before
  - shows MMk plot for high epsilon, center SHMS

Nacer
-----
KaonLT Heep Singles analysis
- testing different boiling factors
  - Mack: 2.5%/100uA (scaler)
  - Vijay: 5.3%/100uA (track)
  - Richard: 7.9%/100uA (track)
- only did test for HMS/SHMS singles, SHMS 10.6 is still high
- hopefully Nathan's Lumi analysis will settle issue of what is the correct
  boiling factor to use

Next steps:
- will start moving back to K+ production data
  - all data replayed
  - shows MMk for low epsilon, center SHMS setting
    - region underneath Lambda peak is fairly flat
    - GH: try comparing Lambda, Sigma SIMC distributions to the data

Ali
---
No report, working on thesis

Alicia
------
Info given by GH in her absence
- made good progress on Geant4 simulation for proton abs correction
  - an issue still with S2 quartz plane, will try switching physics process to
    Cherenkov
  - hoping to have results within a week of returning from New Brunswick

Nathan
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Reports done for grad class, will return to Lumi analysis
- will be able to make a decent set of boiling plots soon (see Nacer's
  discussion)

Next Meeting
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- Thur Jan 2 @ 16:00 Eastern/15:00 Regina
  - PionLT will go first
  - main agenda item will be to review first drafts of slides by Richard,
    Vijay, Ali