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Jul 18/24 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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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, Ali Usman, Alicia Postuma, Nathan Heinrich, Vijay Kumar,
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Zach Sullivan, Nacer Hamdi
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FIU - Pete Markowitz
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JLab - Dave Gaskell
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Virginia - Richard Trotta
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York - Stephen Kay
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Nathan & Zach
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-------------
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iFarm issues, still dealing w/bugs related to ALMA9 migration, changes to
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Python syntax, etc.
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- Richard is making updates to LTsep package for new hcana version
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- Richard's goal is to have everything working before Aug 20, when the last
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RH7 node disappears
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- Junaid has posted isntructions on RedMine about ALMA9 setup
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Richard
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-------
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- Gave a talk on Lumi analysis @ NPS meeting that you might want to look up
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- https://indico.jlab.org/event/866/contributions/14917/subcontributions/227/attachments/11518/17830/Trotta_NPSTalkLuminosityAnalysis_2024.pdf
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- Dave also gave a talk on SIMC at this meeting you might find useful
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https://indico.jlab.org/event/866/contributions/14917/subcontributions/228/attachments/11515/17826/simc_nps.pdf
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- Suggested that Nathan give a talk on BCM Calibs @ Quarterly Analysis Meeting
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- Stephen has made a note of this. The meeting is planned for early Sept.
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KaonLT LT-separations
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- changed functional forms (based on Fpi-2 experience)
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SigL=p1*QfacL*tpole*exp(-p6*|t|)
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where QfacL=Q2/(1+1.77*Q2+0.12*(Q2**2))
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- the 1.77, 0.12 factors are from Fpi-2, they would eventually have to be
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changed for KaonLT
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SigT=p5*QfacT*exp(-p8*|t|)
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where QfacT=exp(-(Q2**2))/Q2
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SigLT=p9/(1+Q2)*exp(-p10*|t|)
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SigTT=p13/(1+Q2)*exp(-p14*|t|)
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- looking at Q2=3.0,W=3.14 with new functions
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- note that sigT has no t-dependence
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- *NB* ratios at low epsilon indicate that adding a t-dep to sigT would
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probably be helpful, maybe of the form (A+B*exp(-C*|t|))
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Vijay
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-----
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- also dealing with ALMA9 issues, things are now working and doing replays for
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detection volume systematic uncertainty study
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- tried changing functional form for LT, TT
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- oscillations in ratios did not change much
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- *NB* will need to try a different change to LT, TT, probably with a
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stronger t-dependence
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Ali
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---
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- away last week in Quebec
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- before he left, finished piDelta BSA analysis which Alicia showed in her talk
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- GH suggested that Ali show plots of asymmetry vs phi for all settings at
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next meeting
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- BSA systematic uncertainty studies not yet done (mostly cut dependence)
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- GH had suggested to also do HGC-cut dependence study
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- would compare a tighter cut to nominal cut, not a looser one
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- Need to inquire on status of piDelta theory calcs, none were yet available
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last year
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- will check first with Stefan Diehl if he is aware of any developments
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Alicia
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------
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- summarized updates to pi+n BSA paper based comments from co-authors
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- CLAS-6 also showed Q2-dependence of BSA, but over a wide integrated x-range
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- theirs was primarily to show change in sign from t-channel to u-channel
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- need to clarify that ours is for specific xB, which is new
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- also summarized PRL justification text and list of potential referees
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- additional comments just received from B-G Yu, paper likely won't be
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submitted until week of July 29
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Nacer
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-----
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KaonLT Heep yield comparison
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- recently finished 6.2, 8.2 GeV
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- earlier, had done 3.8, 4.9, with Data/MC ratios near 1
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- 6.2 GeV ratios simiar to Richard, but 8.2 GeV ratios are somewhat different
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- 8.2 GeV:
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- *NB* small issue with plotting script, ratios are not quite constant
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- Data/MC=1.127, while Richard had 1.28
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- appears to be good news, but we need to understand what's different
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- analysis uses a modified script based on Richard's old one
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- uses Richard's LH2 boiling correction
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- still analyzing 10.6 GeV data
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- *NB* will meet with Richard offline after both are done to compare numbers
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and see what's different
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Next Meetings
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--------------
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- Thur July 25 @ 15:00 Eastern/13:00 Regina
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- Dave will take notes
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- KaonLT will go first
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- Special Time: Wed July 31 @ 15:00 Eastern/13:00 Regina
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- PionLT will go first
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