Jan 4/24 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 ------- Regina - Garth Huber, Nathan Heinrich, Ali Usman, Alicia Postuma, Muhammad Junaid, Nacer Hamdi, Vijay Kumar CUA - Richard Trotta, Casey Morean, Tanja Horn JLab - Dave Gaskell FIU - Pete Markowitz Nathan ------ - working on slides for Hall C meeting, need to have draft slides ready for Thurs Jan 11 - will start working on Lumi Carbon singles data from Sept/22 Junaid ------ Completed replay of PionLT data - 7 scripts for Heep (coin, HMS-sing, SHMS-sing), Lumi, Physics - batch scripts take 3 arguments - various issues encountered during the replays that took a lot of attention - broken symlinks, typos, duplicate run# - fixed all issues, all data now on cache disk Tracking Efficiency study - SHMS cuts to be used - it's important that variables involving tracked info (e.g. P.aero.xAtAero) are not used in any way in the study - add a cut CAL>0.05 (no_track variable) on SHMS - HMS cuts - add H.cal.etotnorm > 0.7 Richard ------- HGC cut status in physics analysis - mis-spoke at last meeting that no HGC cut is applied - in reality, HGC<1.5pe cut outside inefficient region is used - also a hole cut is applied, needs to be added also to SIMC analysi - MM_K plot - Black=Center Red=Left Green=Right - Lambda peak looks fairly clean, reasonable normalized yield consistency between the three settings - *NEED TO DO* a Lambda yield vs HGC cut study Heep data/MC yields under various conditions - as presented at the last meeting, there is a significant linear trend to the Data/MC ratio vs Q2 - various investigations to see where this is coming from - applying a SHMS Dipole Exit Cut - DG: need to apply the same cut to SIMC data - PID cuts - DG: suggests to remove all SHMS proton cuts - Heep data up to Q2=7.5 - this is a significantly higher Q2 than we have done in past Heep-check - can try a different Heep parameterization in SIMC, follow instructions in Wenliang Li's PhD thesis Sorting out issues with Bill's LT-separation code - come questions about seemingly arbitrary parameterization need clarification - we will have a separate meeting on Friday at 14:30 Eastern about this Meeting ID: 954 3340 5506 Passcode: 901353 - testing the code with Q2=2.1 data - various issues with batch submission scripts failing, even though jobs run fine from terminal - Casey suggests to use -phase and -antecedent parameters in SWIF job submissions Ali --- pi+Delta0 BSA analysis - earlier, DG suggested to investigate rho+N->pi+pi0N contribution in addition to SIDIS - SIMC simulation very inefficient - took ~3 days to get 200k events - comparision of rho and SIDIS MC (weighted distributions) - rho peaks at lower MM~1.15 than SIDIS (MM~1.4) - looks like rho will be useful in obtaining a better fit of MM region to left of Delta - t-distribution >0 for rho - DG: confirms that for his rho files, t<0, so there must be a sign issue - some discussion that it migt be a reconstruction code issue, Ali will investigate - tentative strength of rho - DG: initial guess from prior SIDIS analysis is that rho is 10-20% of SIDIS - this seems a good guide for Ali's initial fitting - discussion about large pi+n tail and how to deal with it - NH suggests to arbitrarily scale up the pi+n MC to fit the tail, even though it would dramatically over-shoot the neutron peak - GH: before contemplating this, we really should deal with the issue that the data MM resolution is worse than predicted by MC - DG: made some plots earlier of MM versus FP variables, found some correlations - will try to look at this in a bit more detail - AP will direct DG to where the newest ROOT trees are located Vijay ----- - no plots, but working on LT-sep analysis, will attend tomorrow's meeting Alicia ------ - working on slides for Hall C meeting, need to have draft slides ready for Thurs Jan 11 - sorting out some out of memory errors in python analysis scripts - looking at PARTONS GPD code, manually change contributions of GPDs as per Stefan Diehl's paper Nacer ----- KaonLT Q2=0.5 drift chamber calibration checks - Junaid helped adapt code from PionLT to KaonLT - initial plots of SHMS drift distance spectra BLUE=after calib RED=before calib - red has some significant deficits for d<0.1, particularly SHMS 1v,1u planes - blue looks better in some spots, but SHMS 2v planes indicate new t0 offsets are needed, deficit for d<0.1, and residual distributions actually worse than red - need to rerun code with t0 flag off, Junaid will give info Next Meeting ------------ - Thur Jan 11 @ 15:00 Eastern/14:00 Regina - KaonLT will go first Please fill out the poll at: https://www.when2meet.com/?22907632-UJ4DV So far, it looks like Thursdays at 14:30 Eastern/13:30 Regina is best