Oct 31/24 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, Muhammad Junaid, Alicia Postuma, Nathan Heinrich,
   Nacer Hamdi
Virginia - Richard Trotta
Ohio - Julie Roche

Richard
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KaonLT function fitting for LT separation -- short update from France
- wrote some scripts to fit each t-bin separately, and use the variation of
  parameters with #t-bin to see which function yields more consistent
  parameters, and hence is a better function to use
  - considering slight changes to sigT, sigL unchanged
  - using sigTT from Marco's thesis (was best in last report), sigLT unchanged
  - script does 2 iterations with each version
  - picks the one with best chi-square out of all functional forms, for each
    t-bin
  - loops over Q2=3.0,W=3.14 and Q2=4.4,W=2.74 settings for now

- still at France workshop next week, will show results in 2 weeks, expecting
  to see some improvements in ratios

Alicia
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Geant4 simulation for proton absorption correction
- just started setting up the code

Nacer
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Heep singles for KaonLT
- setting up SIMC for 4.9, 6.2, 8.2, 10.6 GeV settings
- selecting runs matching COIN data

- want to introduce Mark's tracking updates (see last meeting) before next
  replay

Junaid
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PionLT pi+ PID
- updated CT offset to put peak at zero, also RF offset to put peak at 1
  - previously, the peak was slightly shifted, fixing this gives ~200 more
    pi+n events at Ebeam=5.98, 7.94 GeV settings

- in contact with Stephen re. TOF corrected RF time
  - code was pushed, but not merged into main branch

- very curious plot of piCT vs RF for one setting
  - strong correlation of piCT vs RF seen
    - is this expected, or an indication of an incorrect TOF correction?
    - GH thinks the tilt indicates CT peak could be made narrower by removing
      the correlation
  - Nathan skeptical whether TOF correction is worthwhile to look at
  - GH thinks it's worth a brief look, hopefully it's not a wild goose chase

Updated HMS optics
- new 6.5 GeV/c matrix elements implemented and pushed
- new 5.9, 6.1 GeV/c ME appear to be available

Aerogel efficiencies
- n=1.011 tray with >2.5pe cut gives 97.5% efficiency
  - Richard gets similar numbers
  - Ali shows a plot from his thesis, Aerogel efficiency vs Run# for all
    settings
    - efficiencies vary 98-100%

Nathan
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PionLT Coin Lumi studies
- unfortunately no plots today, ran the wrong script by mistake

- will combine carbon and LH2 data for all singles settings to get more
  accurate boiling correction

Next Meeting
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- Thur Nov 7 @ 16:30 Eastern/15:30 Regina
  - PionLT will go first
  - GH will be in Ottawa then, not sure if he can attend or not