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Kaon LT Meetings » mtg_23apr06.txt

Garth Huber, 04/06/2023 07:33 PM

 
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                 Apr 6/23 PionLT/KaonLT Analysis Meeting Notes
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                 ---------------------------------------------
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                           (Notes by GH and SJDK)
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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 - Stephen Kay, Garth Huber, Muhammad Junaid, Ali Usman, Alicia Postuma, 
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   Nathan Heinrich, Vijay Kumar, Love Preet
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CUA - Richard Trotta, Tanja Horn
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Ohio - Julie Roche
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FIU - Pete Markowitz
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Junaid Updates
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--------------
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- Working on DC calib, busy with assignments
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Richard Updates
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---------------
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PID for the right SHMS setting
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- Doing proton analysis from pion cuts
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   - Subtract from MM for kaon
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   - Will do same thing with pion background
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   - Hopefully huge peak in right setting will make more sense
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- will do for settings where there is large background, primarily Q22=5.5, 2.1
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   - haven't looked yet at Q2=4.0, 3.0   
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Lumi analysis
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- still have to discuss some issues with Carlos, so this is still a work in
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  progress
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- 10.6 GeV scan #1 - SHMS 6.842, SHMS Theta 6.495, HMS -3.266, HMS Theta 12.530
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   - Relative track yield only shown
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   - Carbon Runs 5154-5298 looks pretty good, quite flat
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   - Hydrogen Runs 5150-5166 looks like it potentially has a slight bit of
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     anti-boiling, ~1.5% @ 70uA
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- Lumi scan #2 
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   - Carbon 5178-5181 looks flat
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   - Hydrogen looks like it's anti-boiling, ~3% @ 500kHz (ELREAL)
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      - Effect seems to take off > 250kHz
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- Lumi scan #3 - One Peter/Mark took, SHMS -6.2
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   - Carbon 5351-5358 slight decine, but errors large
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   - LH2 5342-5350 HMS strong boiling, ~6% @ 25uA, still investigating
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      - Bad TLTs for this setting
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      - Some had runs times < 1 minute
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      - Some odd cut going on?
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      - Other than setting #3, things look pretty good overall
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   - LHS 5342-5350 Track SHMS 
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      - two outliers, otherwise fine, same issue with LT
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- 8.2 GeV Lumi Run #1 - SHMS -5.745, HMS -5.745
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   - HMS carbon looks ok, quite flat
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   - HMS hydrogen looks ok, some boiling, ~4% at 50uA
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   - SHMS carbon 7948-7951 - anti boiling @ 250kHz (ELREAL)
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   - SHMS LH2 7954-7960 - 2% boiling @ 50uA
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   - Overall lumi looks pretty good
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- Lumi studies can nearly be wrapped up
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   - GH: plan for this?
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   - RT: Give definitive reasons for each of the effects seen, and rejecting
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   - bad runs
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   - Look at HMS/SHMS across all settings, get a definitive boiling correction
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      - HMS should give more reliable boiling result, since lower rates, but
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        SHMS should be consistent with it once rate dependence effects are
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        removed
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   - GH: Rate dependence from physics data? i.e. the settings where we took
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     data at different currents for same setting, a Lumi scan with Physics data
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      - since there seems to be limited good Lumi data to confirm
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        rate-dependent effects, we need to use the Physics Lumi study to
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        confirm rate dependences and find overall rate correction
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   - TH: agrees, it looks like there is a residual rate dependence that is not
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     yet understood
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      - No carbon boiling, but something else we don't understand
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      - March/April 2019 data, had some where we varied the current across a
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        setting
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      - Ali will dig out the runs
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   - AU: "8038-8085 This is largest rate variance in SHMS. There S1X goes upto
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     2.5 MHz"
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   - GH: Vijay, plot on left with increasing SHMS rate is important, if this is
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     real, need to correct for it in Summer 2019 pion data too
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      - it would be really helpful to compare Mar/Apr KaonLT and Summer-2019
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        rate dependence analyses to see if they're consistent
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      - any significant difference might indicate a systematic uncertainty
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Ali Updates
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-----------
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Ali has done preliminary Delta-pi PID
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- Will show plots next week
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Alicia Updates
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--------------
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- No updates, homework/classwork
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Vijay Updates
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-------------
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Working on LT-sep plotting scripts
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- data/SIMC comparison plots
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- Working on comparison between phi/t bins
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- some things don't make sense yet, will show some plots soon
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Stephen Updates
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---------------
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Hall C Quarterly Analysis Meeting
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   - Carlos Lumi studies
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   - Richard update on SIMC kinematic variable scripts
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   - David Hamilton on NPS software changes
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   - maybe Peter Bosted can discuss some of his findings?
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Brief run through of GHP talk
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- EIC/JLab22 Pion Structure prospects
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- Tanja notes:
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   - It's pion structure functions with exclusive reactions, no? -> Update
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     slide 1 title
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   - One thing to be careful with is the statement "cannot do L/T separations"
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     since one can do it if one has a good angular coverage as shown by data
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     analysis from Hall B. Saying "traditional L/T is problematic" seems fine.
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   - Depends who's in your audience :-)
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   - JLab 22 GeV is very useful even if there is an EIC - one can motivate that
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     it provides a window between JLab 12 and EIC
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   - https://arxiv.org/abs/2103.00611# - CLAS Pi0 LT separation measurement
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Nathan Updates
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Quick GHP slide updates
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- Tanja: Add this expt too - E12-13-010 - https://misportal.jlab.org/mis/physics/experiments/viewProposal.cfm?paperId=797
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- Tanja: NSF grant # NSF PHY 2012430
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Next Meeting
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------------
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- Thur Apr 13 @ 16:00 Eastern/14:00 Regina/13:00 Pacific
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- KaonLT will go first
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- will be missing some people because of GHP
(204-204/412)