June 20/25 PionLT/KaonLT Analysis Meeting Notes
                 -----------------------------------------------
                                (Notes by GH)

                    Today: PionLT will be discussed first

Please remember to post your slides at:
https://redmine.jlab.org/projects/kltexp/wiki/Kaon_LT_Meetings

Present
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Regina - Garth Huber, Alicia Postuma, Ivan Zhenchuk, Nathan Heinrich,
   Muhammand Junaid, Nacer Hamdi
York - Stephen Kay
CUA - Tanja Horn
Ohio - Julie Roche
FIU - Pete Markowitz

Nathan
------
Met with Dave last week about the deadtime investigation
- Nathan will double check at what step TCOIN.param files are called by hcana,
  to confirm that they are read in correctly, working on this now
- Nathan will also verify that cuts in PARAM file are working correctly
  - right now, the cuts are producing weird offsets in some bars
- will be busy with JLUO BOD work this week, so tasks will largely wait until
  Nathan returns to Regina

Junaid
------
Q2=3.85, W=2.62 LT-sep
- shows un-iterated sig_unsep with Garth's Rosenbluth fit
- made own script to do the fit and confirming that get the same results as
  Garth
- setting up for iterations, will start with Tanja's Fpi-2 parameterization and
  her final parameters

Nacer
-----
Q2=0.50 K+ LT-sep
- shows un-iterated sig_unsep with Garth's Rosenbluth fit
- made own script to do the fit, but so far it only uses 1 epsilon data
  - Tanja: it's not possible to extract sigL using only 1 epsilon, you have to
    do a simultaneous fit of all (2eps)*(15phi)=30 data points to extract
    L,T,LT,TT

Ivan
----
Q2=0.50 BSA
- selecting pi+ and K+ using a common set of RF cut limits, but selecting
  different peaks for each one
- for K+, does a pi+ leakthrough subtraction, normalizing to the pi+n peak
  - the normalization factor is nearly constant per bin
  - do not understand why, but the pi+n peak is slightly different width
    between K+ sample and leakthrough subtraction sample, this means the
    subtracted region is negative on the sides
  - pi+n normaliation needs some adjustment, want the subtracted pi+n region to
    integrate to zero
  - *NB* Ivan should meet with Nacer to confirm whether his replay shows the
    same pi+n width difference

- K+ BSA nearly zero within errors
  - full fit clearly overfits the data, should try simple fit only
- pi+ BSA slightly nonzero, errors of course smaller

- K+ t-binning
  - tried 3 t-bins, ~20k events/bin for center SHMS setting only
  - Alicia had ~10k events/bin, but the beam polarization for her data was much
    higher, for these data the beam_pol is ~38% so errors are magnified by 2.5x
  - this binning shows the K+ BSA has a small t-dep, slighly more significant
    deviation from zero for highest t-bin

- pi+ t-binning
  - 3 t-bins
  - t range is different than K+, Alicia suggests to try comparable t'=t-tmin
  - limits

Alicia
------
- wrote PLB regarding slow response from them
  - apparently 2 referees did not respond after repeated reminders, so Haiyan
    Gao has now started all over with new referees, unfortunately this means
    the last 2.5 months have been wasted
  - she says that part of the problem is that most potential referees are
    authors on the paper

Next Meeting
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- Thur June 26 @ 15:30 Eastern/13:30 Regina
  - KaonLT will go first