Jul 18/24 PionLT/KaonLT Analysis Meeting Notes
                 ----------------------------------------------
                                (Notes by GH)

                     Today: PionLT 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, Ali Usman, Alicia Postuma, Nathan Heinrich, Vijay Kumar, 
   Zach Sullivan, Nacer Hamdi
FIU - Pete Markowitz
JLab - Dave Gaskell
Virginia - Richard Trotta
York - Stephen Kay

Nathan & Zach
-------------
iFarm issues, still dealing w/bugs related to ALMA9 migration, changes to
 Python syntax, etc.
- Richard is making updates to LTsep package for new hcana version
  - Richard's goal is to have everything working before Aug 20, when the last
    RH7 node disappears
- Junaid has posted isntructions on RedMine about ALMA9 setup

Richard
-------
- Gave a talk on Lumi analysis @ NPS meeting that you might want to look up
  - https://indico.jlab.org/event/866/contributions/14917/subcontributions/227/attachments/11518/17830/Trotta_NPSTalkLuminosityAnalysis_2024.pdf

  - Dave also gave a talk on SIMC at this meeting you might find useful
    https://indico.jlab.org/event/866/contributions/14917/subcontributions/228/attachments/11515/17826/simc_nps.pdf

- Suggested that Nathan give a talk on BCM Calibs @ Quarterly Analysis Meeting
  - Stephen has made a note of this.  The meeting is planned for early Sept.

KaonLT LT-separations
- changed functional forms (based on Fpi-2 experience)

  SigL=p1*QfacL*tpole*exp(-p6*|t|)
  where QfacL=Q2/(1+1.77*Q2+0.12*(Q2**2))
  - the 1.77, 0.12 factors are from Fpi-2, they would eventually have to be
    changed for KaonLT

  SigT=p5*QfacT*exp(-p8*|t|)
  where QfacT=exp(-(Q2**2))/Q2

  SigLT=p9/(1+Q2)*exp(-p10*|t|)
  SigTT=p13/(1+Q2)*exp(-p14*|t|)

- looking at Q2=3.0,W=3.14 with new functions
  - note that sigT has no t-dependence
  - *NB* ratios at low epsilon indicate that adding a t-dep to sigT would
    probably be helpful, maybe of the form (A+B*exp(-C*|t|))

Vijay
-----
- also dealing with ALMA9 issues, things are now working and doing replays for
  detection volume systematic uncertainty study
- tried changing functional form for LT, TT
  - oscillations in ratios did not change much
  - *NB* will need to try a different change to LT, TT, probably with a
    stronger t-dependence

Ali
---
- away last week in Quebec
- before he left, finished piDelta BSA analysis which Alicia showed in her talk
  - GH suggested that Ali show plots of asymmetry vs phi for all settings at
    next meeting

- BSA systematic uncertainty studies not yet done (mostly cut dependence)
  - GH had suggested to also do HGC-cut dependence study
    - would compare a tighter cut to nominal cut, not a looser one

- Need to inquire on status of piDelta theory calcs, none were yet available
  last year
  - will check first with Stefan Diehl if he is aware of any developments

Alicia
------
- summarized updates to pi+n BSA paper based comments from co-authors
  - CLAS-6 also showed Q2-dependence of BSA, but over a wide integrated x-range
    - theirs was primarily to show change in sign from t-channel to u-channel
  - need to clarify that ours is for specific xB, which is new
- also summarized PRL justification text and list of potential referees

- additional comments just received from B-G Yu, paper likely won't be
  submitted until week of July 29

Nacer
-----
KaonLT Heep yield comparison
- recently finished 6.2, 8.2 GeV
- earlier, had done 3.8, 4.9, with Data/MC ratios near 1
- 6.2 GeV ratios simiar to Richard, but 8.2 GeV ratios are somewhat different
- 8.2 GeV:
  - *NB* small issue with plotting script, ratios are not quite constant
  - Data/MC=1.127, while Richard had 1.28
  - appears to be good news, but we need to understand what's different
  - analysis uses a modified script based on Richard's old one
  - uses Richard's LH2 boiling correction

- still analyzing 10.6 GeV data
- *NB* will meet with Richard offline after both are done to compare numbers
  and see what's different

Next Meetings
--------------
- Thur July 25 @ 15:00 Eastern/13:00 Regina
  - Dave will take notes
  - KaonLT will go first

- Special Time: Wed July 31 @ 15:00 Eastern/13:00 Regina
  - PionLT will go first