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Oct 31/24 PionLT/KaonLT Analysis Meeting Notes
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----------------------------------------------
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(Notes by GH)
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Today: KaonLT will be discussed first
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Present
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-------
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Regina - Garth Huber, Muhammad Junaid, Alicia Postuma, Nathan Heinrich,
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Nacer Hamdi
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Virginia - Richard Trotta
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Ohio - Julie Roche
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Richard
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-------
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KaonLT function fitting for LT separation -- short update from France
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- wrote some scripts to fit each t-bin separately, and use the variation of
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parameters with #t-bin to see which function yields more consistent
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parameters, and hence is a better function to use
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- considering slight changes to sigT, sigL unchanged
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- using sigTT from Marco's thesis (was best in last report), sigLT unchanged
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- script does 2 iterations with each version
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- picks the one with best chi-square out of all functional forms, for each
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t-bin
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- loops over Q2=3.0,W=3.14 and Q2=4.4,W=2.74 settings for now
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- still at France workshop next week, will show results in 2 weeks, expecting
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to see some improvements in ratios
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Alicia
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------
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Geant4 simulation for proton absorption correction
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- just started setting up the code
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Nacer
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-----
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Heep singles for KaonLT
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- setting up SIMC for 4.9, 6.2, 8.2, 10.6 GeV settings
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- selecting runs matching COIN data
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- want to introduce Mark's tracking updates (see last meeting) before next
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replay
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Junaid
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------
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PionLT pi+ PID
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- updated CT offset to put peak at zero, also RF offset to put peak at 1
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- previously, the peak was slightly shifted, fixing this gives ~200 more
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pi+n events at Ebeam=5.98, 7.94 GeV settings
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- in contact with Stephen re. TOF corrected RF time
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- code was pushed, but not merged into main branch
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- very curious plot of piCT vs RF for one setting
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- strong correlation of piCT vs RF seen
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- is this expected, or an indication of an incorrect TOF correction?
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- GH thinks the tilt indicates CT peak could be made narrower by removing
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the correlation
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- Nathan skeptical whether TOF correction is worthwhile to look at
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- GH thinks it's worth a brief look, hopefully it's not a wild goose chase
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Updated HMS optics
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- new 6.5 GeV/c matrix elements implemented and pushed
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- new 5.9, 6.1 GeV/c ME appear to be available
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Aerogel efficiencies
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- n=1.011 tray with >2.5pe cut gives 97.5% efficiency
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- Richard gets similar numbers
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- Ali shows a plot from his thesis, Aerogel efficiency vs Run# for all
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settings
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- efficiencies vary 98-100%
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Nathan
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------
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PionLT Coin Lumi studies
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- unfortunately no plots today, ran the wrong script by mistake
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- will combine carbon and LH2 data for all singles settings to get more
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accurate boiling correction
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Next Meeting
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-------------
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- Thur Nov 7 @ 16:30 Eastern/15:30 Regina
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- PionLT will go first
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- GH will be in Ottawa then, not sure if he can attend or not
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