Mar 2/23 PionLT/KaonLT Analysis Meeting Notes
                 ---------------------------------------------
                                (Notes by GH)

                    Today: KaonLT 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, Alicia Postuma, Muhammad Junaid, Nathan Heinrich, 
   Vijay Kumar, Ali Usman
CUA - Richard Trotta, Tanja Horn
JLab - Dave Gaskell
FIU - Pete Markowitz
Ohio - Julie Roche
CSULA - Konrad Aniol

Ali Updates
-----------
Update to Heep singles, request to plot HMS_cal_eff vs P_HMS
- see a small decline with momentum, up to 4 GeV/c
- DG: resolution effect should give lower eff for P<2 GeV/c, not a decrease at
  higher P
   - best to call this a constant 99.5% efficiency with a small point-to-point
     uncertanty to take into account the variation
   - doesn't see any reason for efficiency to decrease for P~6 GeV/c in physics
     data
- AU: will keep an eye on this in physics analysis, as COIN cuts may clear
  things up for P>4 GeV/c

HMS-Cer-Ef vs (x,y)_CER is still to do

For next 2 weeks:
- starting pion PID for physics
   - initial look at Q2=2.1, 3.0 settings and finalize PID cuts for both pi+n,
     pi+Delta0 final states
   - since Ali's foreground is Richard's background, and vice-versa, they will
     coordinate

Richard Updates
---------------
SIMC to hcana variable calculation script
- DG and RT fixed everything, various bugs found, finding an errant minus sign
  was particularly important
- data MC comparison looking better
   - SIMC distributions still a bit narrower than data
- DG: CaFe expt recently found that their fast raster correction in hcana had
  the wrong sign
   - this affects delta-reconstruction, it would be slightly wrong, resulting
     in worsened resolution
   - this is worth checking in our data too, try reversing sign and see if
     resolution improves or not
- fortunately RT had this plot available, shows Raster-Y vs EM
   - looks like there might be a small negative correlation
- TH: In Fpi-2, there was also a correlatino that needed to be corrected for
   - see p.107 of her thesis
- DG: how confident are you in BPM calibration in replay?
   - this would also affect Y-tar reconstruction, in addition to Raster
   - RT: using Carlos Yero's calibration, so believes it's fine

LT-sep code: average kinematics & xsects
- shows some plots for Q2=5.5, W=3.02, t=0.01-1.99, Diamond-cut applied
   - trial bins: 3 t-bins, 10 phi- bins
   - BLACK=center, RED=left, GREEN=right
   - right setting high epsilon looks high compared to others at high -t, lower
     -t bins look fine, so not sure what's going on
- SIMC statistics look too low, GH suggests to run SIMC longer so that
  statistical errors in EXP/SIMC ratio are dominated by uncertainties in data,
  not MC
- GH: Ratio plotting scales need more care, remember that Left & Right SHMS
  settings have some phi bins that are barely populated
   - they may end up with weird ratios, but also these ratios have huge errors,
     they can be safely ignored
   - make plot ranges to concentrate on those phi-bins which have good
     statistics
- GH: also please take a closer look at the EXP/MC plots that were used
  historically (such as in LT-sep procedure slides, and make plots similar to
  those, so that we can more readily interpret the results

For next 2 weeks:
- add more variables to SIMC conversion script
   - push it to SIMC main repository, so it is a resource for others too
- try to see what's going on with right SHMS setting with weird normalization

AU: now that SIMC conversion script is working, wants to test if PBosted
  offsets work for our data or not

Vijay Updates
-------------
Q2=0.38, 0.42 analysis
- updated MMpi cut 0.96->0.98
- shows events per t-bin after all cuts
   - statistics per bin look pretty consistent
   - TH: binning looks okay, highest -t bin is wider, but this is always an
     issue
- working on average-kinematics files, shows some examples

For next 2 weeks:
- complete input files for average-kinematics
- plots of SIMC vs Data
   - GH: please coordinate with RT so that your plots are in same format, so
     that we can more easily interpret them and spot inconsistencies or errors

Nathan Updates
--------------
Aerogel Calibrations now running
- plotting time-dep and run-dep of calibrations
- hoping for one calibration per index, but will see after making plots

Looking more at LD- setting which had yield decrease after new RefTime cuts
- re-running w/Stephen's online setup

Next Meeting
------------
Thur Mar 9 @ 17:00 Eastern/16:00 Regina/14:00 Pacific
- PionLT will go first

New Meeting Time after USA savings time starts on Mar 12:
- we agree to change meeting time to 
  16:00 Eastern/14:00 Regina/13:00 Pacific
- GH will set up Zoom reservations and send out calendar invitations