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Kaon LT Meetings » mtg_23aug10.txt

Garth Huber, 08/10/2023 06:18 PM

 
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                 Aug 10/23 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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Please remember to post your slides at:
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https://redmine.jlab.org/projects/kltexp/wiki/Kaon_LT_Meetings
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Present
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-------
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Regina - Garth Huber, Nathan Heinrich, Muhammad Junaid, Ali Usman, Nacer Hamdi,
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   Vijay Kumar, Alicia Postuma, Portia Switzer
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CUA - Richard Trotta
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FIU - Pete Markowitz
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CSULA - Konrad Aniol
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Richard Updates
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---------------
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Aerogel geometrical tray cuts are now implemented in SIMC
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SIMC 4cm edge Calorimeter geometrical cut
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- PeterB had suggested to implement (remove comment) in the SIMC code
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- RT has done this
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- RT will *follow-up* on whether the cut comment is removed in the master
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  version of SIMC and push, since it's clearly needed for everyone
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Rewrote LT-analysis scripts
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- now apply PID and acceptance cuts on run-by-run basis
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- diamond cuts drawn on Center setting (and hopefully checked for Left and
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  Right?)
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- random subtractions then done for data and dummy target
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- combine all settings and choose t/phi bins for low epsilon, and check for
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  high epsilon
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- compare SIMC to Data-Dummy for each SHMS setting
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- combine settings for each (Q2,W,t,phi,epsilon) bin for Data, Dummy, SIMC
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- yield is calculated from effective charge (where LT, Eff applied to Charge on
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  run-by-run basis)
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- we had an extended discussion on Richard's script to determine average
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  kinematics
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  - the script seems *overly complicated*, a simpler script is less likely to
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    contain errors
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  - GH is willing to have another meeting on this, or any other issue, just
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    ask!
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Vijay Updates
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-------------
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Working on TrkEff for pi+ and electrons
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- plot is shown of TrkEff vs Run #
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  - pi+: 97.5% to 99.9%
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  - e:   99.5% to 99.9%
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  - please make a plot of TrkEff vs S1X_Rate(kHz) so we can see if the
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    decreasing trend with rate makes sense.  It will also make a nice plot for
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    thesis.
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Next step is plot of EDTM_LT vs Trigger Rate
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Ali Updates
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-----------
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Presented draft slides for upcoming ECT* workshop on Transition GPDs
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- workshop dates: Aug 21-25
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- invitation was to present pi+Delta0 channel from KaonLT data
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- Dry run is Monday at 15:00 Eastern
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  - GH will set up and distribute Zoom link
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Alicia Updates
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--------------
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t-binning for BSA analysis
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- starting with Q2=5.5 setting, which has worst statistics
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  - probably will use 4 instead of 5 t-bins
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  - 15 phi bins seems too many for the statistics
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    - error bars fairly big, and lots of sensitivity to whether A, or A,B,C fit
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      is used
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    - will try 9 or 11 phi bins
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    - maybe consider the differences between A, or A,B,C fits to decide which
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      binning to use
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- Q2=4.4 setting:
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  - 15 phi-bins looks okay
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- lower Q2: lots of statistics so can try 8-10 t-bins to nicely get t-shape of
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  asymmetry
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  - since there are so many events, it's not needed to have equal statistics
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    for each t-bin, just as long as they are all above a minimum amount
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Portia Updates
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--------------
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This is Portia's last day with us this summer.  Besh wishes Portia on your
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upcoming wedding!
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Delta0pi+ MM plots
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- scaling SIDIS and piDelta SIMC distributions to match data for each phi bin
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  at Q2=4.4
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  - Green=SIDIS  Blue= piDelta  Red=Green+Blue  Black=Data
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  - statistics are much less than for pi+n BSA analysis
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  - only 1 t-bin for this setting, lower Q2 settings may have 2 t-bins
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- the fits are reasonably good in the Delta region, but some discrepancies
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  - clear evidence of Second Resonance contributions to the data
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  - GH needs to look at *modifying* piDelta code for piN*
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Nathan Updates
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--------------
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Running comparo between data w/ new HGC calib and online data
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- job not done yet, as ifarm is doing annual maintenance this week
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Mods to standard.kinematics are continuing
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Junaid Updates
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--------------
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DC calibs
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- RefTime cuts were wrong for Heep singles data (wrong trigger chosen)
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  - switched to ELREAL RefTime cuts, looks better now
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Calorimeter calibs
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- finished 9.9 GeV calibs, doing only one calibration per shift now
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Next Meeting
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------------
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- Thur Aug 17 @ 16:00 Eastern/14:00 Regina/13:00 Pacific
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- PionLT will go first
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- GH will send an email to DG,TH,JR,PB,PM to see when they're *available* past
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  Aug 17
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