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July 20/23 PionLT/KaonLT Analysis Meeting Notes
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(Notes by GH)
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Today: KaonLT 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, Ali Usman, Alicia Postuma, Muhammad Junaid,
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Portia Switzer, Nathan Heinrich, Vijay Kumar
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JLab - Dave Gaskell
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CUA - Richard Trotta, Tanja Horn
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FIU - Pete Markowitz
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Ohio - Julie Roche
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CSULA - Konrad Aniol
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Richard Updates
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---------------
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DG, AU, RT met Monday on implementing HGC hole cut in SIMC
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- a common recon_hcana script will be used to calculate the variables and
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apply the cut for both hcana and SIMC
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- for now, the same HGC cut is used for low and high epsilon (Vijay's hole)
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- a larger hole will have to be drawn for the 10.6 GeV (high eps) data
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GH, AU, RT, VK met to clarify some issues with LT-separation procedure
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- RT had a bug when combining runs, bug related to the RF time windows
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- *REMINDER* use Stephen's TOF-corrected RF variables for pi/K/p to get
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optimal RF resolution/particle separation
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See slides at: https://hallcweb.jlab.org/doc-private/ShowDocument?docid=1199
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MMk plot with PeterB's adjusted Aerogel cut <4pe & -5<RFtime<5ns
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- HGC hole cut also implemented, <1.5pe removes proton events
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- something seemed wrong, the hole cut removed way too many events
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- upon further check, RT realizes the cut was backwards, keeping ONLY the
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hole
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Ali Updates
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-----------
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- new effic calcs w/finalized PID cuts for analysis & recalculating them
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- setting up SIMC for LT-sep iterations
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- DG pushed Delta Breit-Wigner shape changes from PeterB
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- code is in physics_pion.f, uses exclusive pi+n model and applies
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scaling factor
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- longer term, we should make physics_delta_recoil.f with an entirely new
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cross section model, after we have LT-separated results
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- PID cuts finlized for pi+
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- working on t-binning
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Vijay Updates
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-------------
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HMS calorimeter efficiency update
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- Heep data are very clean, applied >0.7 cut, but would get same efficiency
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if a lower cut >0.2 was used
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- get efficiency 0.9979+/-4E-5
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- will apply this efficiency to ALL data, even those physics runs P<1 GeV/c
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with lower cut, as we discussed last week
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Next steps
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- restart Lumi and boiling studies
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- EDTM-LT already tested, no questions
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Alicia Updates
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--------------
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PARTONS implementation
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- meeting tomorrow morning with Pawel Sznajder (Nat.Cent.Nucl.Res. Poland) on
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the discrepancy seen between her cross section values and those sent by GK
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- GH, AP discussed a BSA paper outline
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- Overleaf project is set up
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- will draft assuming we submit to PRL
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- won't have space to list asymmetry results with two different fits
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- can submit supplemental information (table of results, which can list
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both)
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- but the paper discussion will most likely be based on a weighted-average
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of the two results
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Nathan Updates
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--------------
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HGC calib
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- reviews photoelectron fits from Vijay's code
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- puzzling trend in calib params
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- linear fits vs Run#
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- decreasing gain stopped after Dec/21 for PMTS 2,3,4
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- DG is planning to discuss this with Dave Mack now that he's back
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- has not yet implemented the calib fit functions into hcana
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standard.database
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Working on verifying standard.kinematics for 2021 data
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Junaid Updates
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Fixing param files for 2021-22
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- OfflinePionLT_xxx-yyy.param
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- NH suggests to use a sed command to replace line43 in a uniform manner
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during the calorimeter calib process
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Portia Updates
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--------------
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First comparison of PeterB's SIDIS model to MM histo shape right of DeltaPi
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events looks promising
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- only plan to use SIDIS and DeltaPi SIMC distributions to get the shape,
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not the magnitude
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- will show some plots after more work has been done
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Next Meeting
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- Thur July 27 @ 16:00 Eastern/14:00 Regina/13:00 Pacific
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- PionLT will go first
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