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Kaon LT Meetings » mtg_22oct12.txt

Garth Huber, 10/13/2022 05:56 PM

 
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                 Oct 12/22 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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Regina - Garth Huber, Stephen Kay, Ali Usman, Love Preet, Alicia Postuma,
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   Vijay Kumar, Nathan Heinrich, Muhammad Junaid
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CSULA - Konrad Aniol, Emery Gunselman, Johnathan Conrad, Yeranuhui Ghandilyan
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Ohio - Jacob Murphy, Julie Roche
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CUA - Richard Trotta, Tanja Horn
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JLab - Dave Gaskell
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FIU - Pete Markowitz
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Jacob Updates
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-------------
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- Spectrometer matrix element fitting
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   - HMS 6.2 GeV/c Runs 14970,71,72
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      - Updates to optics matrix not improving things as much as expected
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      - Xsieve resolution remains poor, particularly at negative delta
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      - Meeting with Holly next week
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   - Mark has a README in the dat files directory outlining what each matrix
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     should correspond to
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      - https://github.com/JeffersonLab/hallc_replay/blob/master/DATFILES/README.txt
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      - Need to make sure this is in hallc_replay_lt
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   - A1n optics matrix work - https://github.com/hszumila/shms_optics_a1n
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   - SHMS starts "saturating" at 7.6 GeV/c
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      - Not deep into saturation, but start of the non-linearity for HB,Q1
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      - Holly doing calibration at 8.55 GeV/c
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      - Jacob will look at 8.035 GeV/c
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         - XEM just did delta scans at 8.0 GeV/c
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   - Started on HMS 5.9 and 5.6 GeV/c matrix elements
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   - Holly will send extra sieve data at 6.3 GeV/c
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   - Hoping that we can use one HMS matrix for all settings except high GeV/c
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   - Likely to get a new SHMS matrix, good for all except maybe high GeV/c
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- Done with XEM shifts, will have more time now for analysis
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- Kinematics check
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   - Ensure all runs are correctly labelled in the kinematics file
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      - Add labels if they don't exist
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- Discussions with Casey Morean, Peter Bosted during shift work
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   - ELCLEAN to BCM scalers - check rate is stable vs current as a simple
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     scaler check at beginning of analysis
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      - True only for fixed HMS kinematics 
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      - Should be stable within each Q2 etc
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   - Narrowing timing cuts, Casey has a script
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- NGC calibration script, maybe overcomplicated?
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   - Cameron C has a slimmed down version   
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Nathan Updates
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--------------
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- Finished written part of the comprehensive exam, oral is next week
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- PionLT analysis slowly coming back on the radar
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Junaid Updates
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--------------
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- Similar to Nathan, starting also on PhD committee report (meeting Nov 10)
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Alicia Updates
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--------------
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- Starting to set up analysis of Helicity, getting to grips with software
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- Helicity now in the hcana replay
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   - One analysis script going
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Richard Updates
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---------------
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- Positive polarity Lumi scan (SHMS 10.6 GeV)
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   - Hadron rather than proton cuts in the Lumi
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   - Made things look worse (must be some extra background sneaking in at high
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     current with wide PID cuts?)
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   - Proton cuts look best
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   - Added in event type 3 to the SHMS cut
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      - Didn't make much difference
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   - Opened up current cuts
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      - Things look worse overall (not surprising)
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      - Trend present in SHMS
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      - will tighten the cuts
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- Analysis meeting and APS meeting slides coming soon
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   - APS meeting - Will discuss KaonLT updates
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Ali Updates
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-----------
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- PhD committee report finished, meeting next week (Oct 17)
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- Peter B sent email regarding offsets
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   - Not everyone got it
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   - Peter had a correction factor for all data, SIDIS and KaonLT (high energy)
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      - MM distributions line up well for all pi+/K+/p channels
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      - Applied as a percentage of HMS central momentum
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      - Correction factor works in saturation region of HMS
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      - % offset in delta that is uniform, not a numerical value
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         - Scales with momentum as a consequence
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   -  will try Peter's offsets in Heepcheck analysis
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Vijay Updates
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-------------
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- PhD committee report - done now (meeting Oct 21)
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- Yield vs current plots from Lumi analysis (low E data)
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   - Messy currently, need some optimisation
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Stephen Updates
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---------------
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- No report
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- WNPPC this year is actually in Banff, AB not Siver Star, BC
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   - Banff is the famous Rocky Mountain National Park near Calgary
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   - Feb 16-20, 2023
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   - we will plan on several cars of people driving from Regina
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   - hoping that some USA colleagues can join us
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      - fly to Calgary and then rent a car
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Next Week 
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---------
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- Meeting on Wednesday, will cover draft slides
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   - KaonLT first
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- Poll for Nov/Dec meetings concluded
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   - unfortunately the only good time remains early Wednesday mornings
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   - 8:15 Eastern/7:15 Regina/5:15 California
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   - GH surprised that we didn't gain even the hour due to the daylight savings
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     time shift
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