Dec 21/22 PionLT/KaonLT Analysis Meeting Notes ---------------------------------------------- (Notes by GH and SJDK) 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, Stephen Kay, Ali Usman, Nathan Heinrich CUA - Richard Trotta JLab - Dave Gaskell FIU - Pete Markowitz Ohio - Jacob Murphy Richard Updates --------------- - SIMC changes to make PM, EM calculations the same as in hcana - Added in hcana/Carlos Yero calculations to SIMC, declared 4-momenta as DIM4 vectors to make things easier, had to implement a matrix inversion routine by hand in order to avoid dependency to other packages - New calculations seem to be an improvement, but PmZ has a large shift compared to before - Unit discrepancy? - DG - SIMC is MeV by default - Dave G will take a look at Richard's code, for example some extra manipulation with unit vectors seems to be needed in results_write.f which is not in Carlos' code - From now until Hall C workshop, will focus on LT separation code and try to get something for the presentation Outline/plan for the KaonLT/PionLT Hall C talk ---------------------------------------------- - First round of output from Bill's LT-sep code - A few slides of intro, example plots - Q: should we show some of Alicia's results if there's time? - They will be shown at the summer workshop, GH would put this as a lower priority since there is already a huge amount to cover in ~16min talk - Nathan will make a general outline of the talk and distribute it in the next few days - Richard has a deadline of Jan 6 to get stuff to Nathan - Preliminary cross sections would be nice, but some indication that separations are imminent is what we really want though, so example plots from some steps in an LT separation iteration would be great - Finalised offsets would be nice - As a last resort, online analysis scripts still work OK and produce some useful plots - Diamond cuts using Jacob's routine, applied to KaonLT data would be nice to show in the Hall C talk - GH has an improved PionLT statistical error bar estimate for each L/T-separation, based on online analysis, epsilon based on central kinematics, and expected t-binning - overall, the PionLT projected error bars are very similar to what was in the proposal, with the exception of Q2=8.5 (significantly worse, partly due to reduced delta-epsilon) and some pi- settings - Nathan should let GH know what he would like for his presentation, in terms of either tables or plots - Nathan's talk moved to Thurs afternoon, can advertise for Jacob's optics talk on Friday Ali Updates ----------- - New error calculations in template files - Need to test all run types - Need to incorporate EDTM beam-off correction too - will rerun Lumi data to check that it gives a good result - will finish testing by Friday and submit a big replay on ifarm for over holidays Nathan Updates -------------- - Debugged code needed to submit large # runs to look at the reference times - Should have finished now, will take a look later today Jacob Updates ------------- - Had a few meetings with Holly/Mark on HMS optics - Mark suggests checks to see if there was an issue with the raster when taking the carbon sieve optics data - Check W vs xRaster for hydrogen data (at small z, +/- 1cm from target) - Should see no correlation - Haven't had a look just yet - Might explain lack of resolution in Xsieve - And trends in this - Mark suggested a new method to try to select out sieve holes via cuts, to see if this leads to any improvement in the Xsieve resolution - Use Xfp vs Xsieve rather than xfp vs xpfp - Potential downside: Using variable you're trying to correct (xsieve) - Upside: the cut box is easier to draw, since its a clearer rectange - No delta cuts - will compare the result against SIMC as a check - Try this one more time, removing areas (outside delta +/-8) we don't care about for PionLT - Mark is also puzzled that the Xsieve resolution varies so strongly Next Meeting ------------ Wed Jan 4 @ 9:00 Eastern/8:00 Regina/6:00 Pacific - PionLT will go first If you have not yet done so, please fill in the poll to pick our meeting times for Jan 9-Mar 24 https://www.when2meet.com/?18018413-nyesS From the responses submitted so far, the best times appear to be (all times Eastern): Mondays 10:00-11:30 Wednesdays 9:00-10:30 Thursdays 17:00-18:30 It's very important that you indicate which times you are really unavailable, not simply your personal preferences, as otherwise it will be impossible to find a time that works for most.