Aug 10/23 PionLT/KaonLT Analysis Meeting Notes
                 ----------------------------------------------
                                (Notes by GH)

                     Today: KaonLT will be discussed first

Please remember to post your slides at:
https://redmine.jlab.org/projects/kltexp/wiki/Kaon_LT_Meetings

Present
-------
Regina - Garth Huber, Nathan Heinrich, Muhammad Junaid, Ali Usman, Nacer Hamdi,
   Vijay Kumar, Alicia Postuma, Portia Switzer
CUA - Richard Trotta
FIU - Pete Markowitz
CSULA - Konrad Aniol

Richard Updates
---------------
Aerogel geometrical tray cuts are now implemented in SIMC

SIMC 4cm edge Calorimeter geometrical cut
- PeterB had suggested to implement (remove comment) in the SIMC code
- RT has done this
- RT will *follow-up* on whether the cut comment is removed in the master
  version of SIMC and push, since it's clearly needed for everyone

Rewrote LT-analysis scripts
- now apply PID and acceptance cuts on run-by-run basis
- diamond cuts drawn on Center setting (and hopefully checked for Left and
  Right?)
- random subtractions then done for data and dummy target
- combine all settings and choose t/phi bins for low epsilon, and check for
  high epsilon
- compare SIMC to Data-Dummy for each SHMS setting
- combine settings for each (Q2,W,t,phi,epsilon) bin for Data, Dummy, SIMC
- yield is calculated from effective charge (where LT, Eff applied to Charge on
  run-by-run basis)

- we had an extended discussion on Richard's script to determine average
  kinematics
  - the script seems *overly complicated*, a simpler script is less likely to
    contain errors
  - GH is willing to have another meeting on this, or any other issue, just
    ask!

Vijay Updates
-------------
Working on TrkEff for pi+ and electrons
- plot is shown of TrkEff vs Run #
  - pi+: 97.5% to 99.9%
  - e:   99.5% to 99.9%
  - please make a plot of TrkEff vs S1X_Rate(kHz) so we can see if the
    decreasing trend with rate makes sense.  It will also make a nice plot for
    thesis.

Next step is plot of EDTM_LT vs Trigger Rate

Ali Updates
-----------
Presented draft slides for upcoming ECT* workshop on Transition GPDs
- workshop dates: Aug 21-25
- invitation was to present pi+Delta0 channel from KaonLT data

- Dry run is Monday at 15:00 Eastern
  - GH will set up and distribute Zoom link

Alicia Updates
--------------
t-binning for BSA analysis

- starting with Q2=5.5 setting, which has worst statistics
  - probably will use 4 instead of 5 t-bins
  - 15 phi bins seems too many for the statistics
    - error bars fairly big, and lots of sensitivity to whether A, or A,B,C fit
      is used
    - will try 9 or 11 phi bins
    - maybe consider the differences between A, or A,B,C fits to decide which
      binning to use
    
- Q2=4.4 setting:
  - 15 phi-bins looks okay

- lower Q2: lots of statistics so can try 8-10 t-bins to nicely get t-shape of
  asymmetry
  - since there are so many events, it's not needed to have equal statistics
    for each t-bin, just as long as they are all above a minimum amount

Portia Updates
--------------
This is Portia's last day with us this summer.  Besh wishes Portia on your
upcoming wedding!

Delta0pi+ MM plots
- scaling SIDIS and piDelta SIMC distributions to match data for each phi bin
  at Q2=4.4
  - Green=SIDIS  Blue= piDelta  Red=Green+Blue  Black=Data
  - statistics are much less than for pi+n BSA analysis
  - only 1 t-bin for this setting, lower Q2 settings may have 2 t-bins

- the fits are reasonably good in the Delta region, but some discrepancies
  - clear evidence of Second Resonance contributions to the data
  - GH needs to look at *modifying* piDelta code for piN*

Nathan Updates
--------------
Running comparo between data w/ new HGC calib and online data
- job not done yet, as ifarm is doing annual maintenance this week

Mods to standard.kinematics are continuing

Junaid Updates
--------------
DC calibs
- RefTime cuts were wrong for Heep singles data (wrong trigger chosen)
  - switched to ELREAL RefTime cuts, looks better now

Calorimeter calibs
- finished 9.9 GeV calibs, doing only one calibration per shift now

Next Meeting
------------
- Thur Aug 17 @ 16:00 Eastern/14:00 Regina/13:00 Pacific
- PionLT will go first

- GH will send an email to DG,TH,JR,PB,PM to see when they're *available* past
  Aug 17