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Apr 20/23 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 - Tanja Horn
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FIU - Pete Markowitz
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JLab - Dave Gaskell
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CSULA - Jonathan Conrad
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Nathan Updates
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--------------
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Aerogel Calibration
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- 3 param files for 2021/2022 data, 2x 2021-22, 1x summer 2022
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- Need PID study before trusting pion yield numbers in recalibrated data
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- Showing calib parameters and then comparison to online replay
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- 6 GeV data, Q2=3.85, W=2.02 using 2nd calib file
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- With new calibration files, NPE peak has broadened slightly and moved
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slightly to the right
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- likely better separation between high PE (pion) and low PE (p,K) events
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- ~10x more counts >40PE than before
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- 10.5 GeV data, Q2=3.85, W=2.62 using 3rd calib file
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- similarly, peak shifted to higher PE and broader distribution
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- New aerogel params look good
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- will run some LD+/- data also to check
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- HMS Cherenkov next to do, issues running this at the minute
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- SHMS HGC and NGC after that
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Junaid
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------
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- Nuclear physics final tomorrow, so no report
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Alicia
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------
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- Finals coming up too, no report
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Ali updates
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-----------
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SIMC vs Data Heep PM/EM/W variables
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- Richard's script to calculate variables in SIMC in the same way as the
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data
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- Replays failed overnight, as did Nathan's
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- What's the issue?
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- HeeP 6.2, 8.2, 10.6 GeV data w/o offsets applied
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- PMY in all three cases, data mean is -0.013, same shift from SIMC
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- distribution gets a bit broader at higher energy, but qualitatively similar
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- Same mean for each, should one offset fix all of these?
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- DG: Is PMY vertical or horizontal here?
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- Depending upon which it is, could just be fixable with a single out plane
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angle offset, don't know which arm though
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- AU: checked hcana after meeting, PMY is out-of-plane (OOP)
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- Clarifications on derivatives calculated by heepcheck.f
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- TH: program only calculates in-plane variables since Heep e+p must be
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co-planar
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- program does not give out-of-plane offsets, free to adjust these at will
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- dW/dE_m/dp_m(par)/dp_m(perp) are all in MeV
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- DG: need to be sure BPM calibration is correct in replay
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- hcana corrects the variables for the beam offset
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- if your offsets differ from Peter B, it might be due to wrong BPM calib
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- Ali will double-check
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PID study
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- not 100% done, will rely upon Richard/Ali doing some iterations between each
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other
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Richard
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-------
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- Not feeling well today, no report
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Vijay Updates
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-------------
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Yield calculations for each (t,phi) bin
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- Some bugs in script, busy fixing these, no plots yet
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Stephen Updates
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---------------
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Hall C quarterly analysis meeting next Thursday, 13:00 Eastern
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- 3 talks planned
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- Richard on SIMC PM/EM calculation script
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- David Hamilton on NPS software upgrades
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- Carlos on Lumi studies
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Next Meeting
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------------
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- Thur Apr 27 @ 16:00 Eastern/14:00 Regina/13:00 Pacific
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- KaonLT will go first
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