Oct 12/22 PionLT/KaonLT Analysis Meeting Notes
                 ----------------------------------------------
                           (Notes by GH and SJDK)

                    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, Stephen Kay, Ali Usman, Love Preet, Alicia Postuma,
   Vijay Kumar, Nathan Heinrich, Muhammad Junaid
CSULA - Konrad Aniol, Emery Gunselman, Johnathan Conrad, Yeranuhui Ghandilyan
Ohio - Jacob Murphy, Julie Roche
CUA - Richard Trotta, Tanja Horn
JLab - Dave Gaskell
FIU - Pete Markowitz

Jacob Updates
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- Spectrometer matrix element fitting
   - HMS 6.2 GeV/c Runs 14970,71,72
      - Updates to optics matrix not improving things as much as expected
      - Xsieve resolution remains poor, particularly at negative delta
      - Meeting with Holly next week
   - Mark has a README in the dat files directory outlining what each matrix
     should correspond to
      - https://github.com/JeffersonLab/hallc_replay/blob/master/DATFILES/README.txt
      - Need to make sure this is in hallc_replay_lt
   - A1n optics matrix work - https://github.com/hszumila/shms_optics_a1n
   - SHMS starts "saturating" at 7.6 GeV/c
      - Not deep into saturation, but start of the non-linearity for HB,Q1
      - Holly doing calibration at 8.55 GeV/c
      - Jacob will look at 8.035 GeV/c
         - XEM just did delta scans at 8.0 GeV/c
   - Started on HMS 5.9 and 5.6 GeV/c matrix elements
   - Holly will send extra sieve data at 6.3 GeV/c
   - Hoping that we can use one HMS matrix for all settings except high GeV/c
   - Likely to get a new SHMS matrix, good for all except maybe high GeV/c

- Done with XEM shifts, will have more time now for analysis
- Kinematics check
   - Ensure all runs are correctly labelled in the kinematics file
      - Add labels if they don't exist

- Discussions with Casey Morean, Peter Bosted during shift work
   - ELCLEAN to BCM scalers - check rate is stable vs current as a simple
     scaler check at beginning of analysis
      - True only for fixed HMS kinematics 
      - Should be stable within each Q2 etc
   - Narrowing timing cuts, Casey has a script

- NGC calibration script, maybe overcomplicated?
   - Cameron C has a slimmed down version   

Nathan Updates
--------------
- Finished written part of the comprehensive exam, oral is next week
- PionLT analysis slowly coming back on the radar

Junaid Updates
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- Similar to Nathan, starting also on PhD committee report (meeting Nov 10)

Alicia Updates
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- Starting to set up analysis of Helicity, getting to grips with software
- Helicity now in the hcana replay
   - One analysis script going

Richard Updates
---------------
- Positive polarity Lumi scan (SHMS 10.6 GeV)
   - Hadron rather than proton cuts in the Lumi
   - Made things look worse (must be some extra background sneaking in at high
     current with wide PID cuts?)
   - Proton cuts look best
   - Added in event type 3 to the SHMS cut
      - Didn't make much difference
   - Opened up current cuts
      - Things look worse overall (not surprising)
      - Trend present in SHMS
      - will tighten the cuts

- Analysis meeting and APS meeting slides coming soon
   - APS meeting - Will discuss KaonLT updates

Ali Updates
-----------
- PhD committee report finished, meeting next week (Oct 17)

- Peter B sent email regarding offsets
   - Not everyone got it
   - Peter had a correction factor for all data, SIDIS and KaonLT (high energy)
      - MM distributions line up well for all pi+/K+/p channels
      - Applied as a percentage of HMS central momentum
      - Correction factor works in saturation region of HMS
      - % offset in delta that is uniform, not a numerical value
         - Scales with momentum as a consequence
   -  will try Peter's offsets in Heepcheck analysis

Vijay Updates
-------------
- PhD committee report - done now (meeting Oct 21)

- Yield vs current plots from Lumi analysis (low E data)
   - Messy currently, need some optimisation

Stephen Updates
---------------
- No report
- WNPPC this year is actually in Banff, AB not Siver Star, BC
   - Banff is the famous Rocky Mountain National Park near Calgary
   - Feb 16-20, 2023
   - we will plan on several cars of people driving from Regina
   - hoping that some USA colleagues can join us
      - fly to Calgary and then rent a car

Next Week 
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- Meeting on Wednesday, will cover draft slides
   - KaonLT first

- Poll for Nov/Dec meetings concluded
   - unfortunately the only good time remains early Wednesday mornings
   - 8:15 Eastern/7:15 Regina/5:15 California
   - GH surprised that we didn't gain even the hour due to the daylight savings
     time shift