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Apr 16-17/26 PionLT/KaonLT Analysis Meeting Notes
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(Notes by GH)
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Today: PionLT will be discussed first
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Thursday: Present
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Regina - Garth Huber, Nathan Heinrich, Alicia Postuma, Nermin Sadoun,
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Vijay Kumar, Nacer Hamdi, Muhammad Junaid
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Ohio - Julie Roche
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CUA - Chi Kin Tam, Sameer Jain, Tanja Horn
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CSULA - Konrad Aniol
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JLab - Dave Gaskell
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Nathan
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------
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PionLT LT-sep
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- need to do PID studies for Q2=5.0 W=2.95 setting
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- showed last week that there was lots of p/K leakthrough for all 3 epsilons
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- some cut presumably incorrect somehow
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- UTIL_PION has PID study stuff, but it's broken
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- Nacer has supplied his PID code for comparison
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Juunaid
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-------
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- no report, working on thesis
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- leaves for Pakistan this weekend, plans to attend Friday meetings while away
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Sameer
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------
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PionLT PID cuts for Q2=1.6 W=3.08 setting
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- applied NGC <5npe cut to remove positrons, peak in PCAL went away
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- *NB* Nathan: suggest to reverse the NGC >5npe cut to see where in MM the
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positrons end up
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- if they are far from pi+n region, the positrons will be eliminated by MM
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anyways and won't need this cut
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- shows plots of RFtime vs MM w/ various cuts
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- RFtime cut doesn't seem to help remove background beyond the other PID cuts
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- looking at Dummy Target subtraction, plans to show some results next week
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Alicia
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------
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u-channel Q2=3.0 W=3.14 LT-sep
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- data shown for SHMS center high epsilon setting
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- compared default u-channel SIMC model (based on extrapolation of Bill's
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thesis) to data
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- data is 10-30x higher than SIMC, depending on setting and u-bin
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- looks like upper end of MM cut will need to move higher
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- need to confirm with Richard on what Boiling Correction to use for these data
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Vijay
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-----
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PionLT low Q2 LT-sep
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- shows new results for Q2=0.375, 0.425 w/ t-shift applied
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- 5-6 iterations were done for both
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- sigL is flatter now at low -t
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- sigT has moved up to compensate
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- higher -t bins don't change much
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- *NB* Garth: please make new plots of kinematic and spectrometer variable
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comparisons with data
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Chi Kin
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-------
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KaonLT high Q2 LT-sep
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- revised pion bkd subtraction after new HGC cut
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- working on new method of doing background subtraction event-by-event should
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improve agreement between data and MC
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Nacer
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-----
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KaonLT Q2=0.5 LT-sep
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- found a bug in CoinBlock correction script and now has a factor for each run,
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will include this info in next yield calcs
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- adjusted t-bin limits upwards, move from 9 to 8 t-bins, due to application of
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t-shift
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- getting SLURM time out errors, changed memory allocation but it didn't help
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- some Lambda statistics anomalies
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- was expecting ~10k events/bin, but some t-bins at high epsilon seem
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anomalously low, low epsilon statistics are as expected
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- still investigating
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Friday: Present
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Regina - Garth Huber, Alicia Postuma, Nacer Hamdi, Nermin Sadoun,
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Nathan Heinrich, Muhammad Junaid
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CUA - Tanja Horn, Chi Kin Tam
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JMU - Gabriel Niculescu
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Virginia - Richard Trotta
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York - Stephen Kay
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FIU - Pete Markowitz
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Nermin
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------
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PionLT LD2 cryotarget boiling corrections
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- replaying data, had some errors due to definition of ROOT path, problem
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fixed, replaying data now
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- there are cryotarget runs for both 2021 and 2022
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Richard
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-------
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KaonLT high Q2 LT-sep
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- followed up on CoinTime blocking report file errors reported by Nacer
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- replay 4b should be done next week
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- Chi Kin sent an email on what optics offsets to use, will require a replay
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4c
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- looked at Q2=3.0 W=3.14 w/ t-shift
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- need to implement Chi Kin's new HGC hole cut
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- need to redo bkd subtraction
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- Alicia: asked for clarification on LH cryotarget boiling factor
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- using same as Ali 4.3%/100uA
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- *NB* Nathan: Sameer had mentioned earlier on checking if KaonLT CoinLumi
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yields are flat vs current/rate
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- Richard needs to follow up on this
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Gabriel
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-------
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KaonLT Lambda Sigma0 Lambda* analysis
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- progress is slow, wants to do all settings at once in a unified picture
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Next Meetings
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-------------
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- Thurs: Apr 23 @ 16:00 Eastern/14:00 Regina
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- KaonLT will go first
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- Fri: Apr 24 @ 11:00 Eastern/9:00 Regina
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- we will continue where we left off
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