Kaon_LT Experiment

{{>TOC}}

h1. *KaonLT/PionLT Weekly Meetings*

KaonLT/PionLT collaboration analysis meetings. Please add your talk to the meeting ahead of time. Add the newest meeting to the top of the list!

---

h2. 2024 Meetings

---

h3. Oct 3, 2024

* Richard

** attachment:KaonLTMeeting10_3_24.pdf

** Finally resolved issue with ratios sitting between 0.2-0.6 by adjusting the W term.

* Vijay

** Working to complete the volume systematic uncertainty study. The only HMS delta systematic uncertainty is in progress.

** attachment:Vijay_Oct3_2024.pdf

---

h3. September 26, 2024

* Garth's Notes attachment:mtg_24sep26.txt

* Alicia

** Responding to referee comments: computing pion PID efficiency and purity

** Discovered small amount of proton leakthrough -> added lower cut MMpi>0.91

** attachment:BSA_Postuma_Sep26.pdf

---

h3. September 18, 2024

* Garth's Notes attachment:mtg_24sep19.txt

* Richard

** attachment:KaonLTMeeting9_18_24.pdf

** Running Vijay's pion Q2=0.38 setting worked nicely using the kaon scripts but there is an issue with the MM location that needs to be sorted out.

---

h3. September 12, 2024

* Garth's Notes attachment:mtg_24sep12.txt

* Nacer

** attachment:20240912_kaonLT_nacer.pdf

* Ali

** Updated Missing Mass shape study plots

** attachment:KaonLT_Meeting_Sept_12_2024.pdf

---

h3. September 5, 2024

* Garth's Notes attachment:mtg_24sep05.txt

* Richard

** attachment:KaonLTMeeting9_5_24.pdf

** The ratios seem to still be settling at values between 0.3-0.6 for all Q2. I outline some ideas for debugging this issue.

---

h3. August 29, 2024

* Garth's Notes attachment:mtg_24aug29.txt

* Nacer

** attachment:20240829_kaonLT_nacer.pdf

** HeeP data/simc ratio improvements after missing mass cut MMp<0.11 GeV/c^2.

* Nathan and Zach

** Zach's last meeting

** presented final set of plots using CPULT + estimated ELT where EDTM was strange for 2022 Lumi data.

** found that CPULT was not working properly in HMS only runs, but was fine in SHMS data.

** Plots: attachment:Yield_2022_HMS_C_Final_EDTM.pdf attachment:Yield_2022_HMS_C_Final_ELT.pdf attachment:Yield_2022_HMS_LH2_Final_EDTM.pdf attachment:Yield_2022_HMS_LH2_Final_ELT.pdf attachment:Yield_2022_SHMS_C.pdf attachment:Yield_2022_SHMS_C_Final.pdf attachment:Yield_2022_SHMS_LH2_before.pdf attachment:Yield_2022_SHMS_LH2_Final.pdf

---

h3. August 22, 2024

* Garth's Notes attachment:mtg_24aug22.txt

---

h3. August 15, 2024

* Dave/Alicia's Notes attachment:mtg_24aug15.txt

* Richard

** attachment:heep_ratio.pdf attachment:FullAnalysis_3p8_Offset.pdf attachment:FullAnalysis_4p9_Offset.pdf attachment:FullAnalysis_6p2_Offset.pdf attachment:FullAnalysis_8p2_Offset.pdf attachment:FullAnalysis_10p6_Offset.pdf

** HeeP ratios are consistent with my previous results (slight changes from improvements to HMS cherenkov/calorimeter efficiency). There are some inconsistencies between Nacer and me, specifically with the SHMS Hodo efficiencies. My replays were from Dec. 2023, so I want to rerun all replays to double-check consistency between my results.

** Q=4.4/W=2.74 results were included in the KaonLT global comparison from last week. Q2=3.0/W=2.32 were running and slides will be posted when these are finished up to get the KaonLT global comparison for all Q2 (minus Q2=0.5).

* Nacer

** Heep data/simc study continue

** SHMS 3/4 Hodo and EDTM live time different from Richard's results for the same beam energies.

** More details attachment:20240815_kaonLT_nacer.pdf

---

h3. August 7, 2024

* Garth's Notes attachment:mtg_24aug07.txt

* Richard

** attachment:KaonLTMeeting8_7_24.pdf

** Q2=2.115, 3.0 (W=3.14), 5.5 were plotted vs -t (scaled to W=3.0) as well as vs Q2 (for fixed t). There is nice consistency between settings for L/LT/TT, but T has an odd shape that needs to be investigated.

** This study will be expanded to include all Q2 settings which should fill out the comparison and narrow down a proper T description. 

* Nacer

** attachment:20240807_kaonLT_nacer.pdf

** HeeP data/simc ratio is in order of 1.6% and 4% for 3.8 GeV and 4.8 GeV data respectively. Unfortunately, it the discrepancy is higher for 6.2, 8.2 and 10.6 GeV, which needs more investigation.

* Vijay

** Changed the SigLT and SigTT functional forms to improve the yield ratio plots.

** The new forms are: SigLT = p1*exp(p2*t) + p3/t, SigTT = p1*exp(p2*t) + p3/t.

** The updated ratio plots are attached. 

** attachment:375_781.png, attachment:375_629.png, attachment:375_286.png 

** I'll catch up on the analysis after my final thesis defense, and then submit the final version to the FGSR office!

---

h3. July 31, 2024

* Garth's Notes attachment:mtg_24jul31.txt

* Richard

** attachment:KaonLTMeeting7_31_24.pdf

** Using old log entries from Fpi, I have fit the Q2/W/theta dependence per t-bin.

* Vijay

** The systematic uncertainties in the separated cross-sections due to SHMS and HMS volumes have been determined.

** The effect of varying individual acceptance cuts (delta, xptar, yptar) by ±10% at a time on the separated cross-sections has been analyzed.

** The net effect on the separated cross-sections was determined by summing the uncertainties in quadrature for all six cuts (delta, xptar, yptar, each has two cuts).

** For SHMS

*** SigL: Varies between 0.1% and 0.8%    

*** SigT: Varies between 0.1% and 1.2%

** For HMS:

*** SigL:Varies between 19% and 28%    

*** SigT:Varies between 14% and 19%

** Detailed spreadsheets outlining the uncertainties for both spectrometers are attached.

*** attachment:Q1SHMSAcceptanceStudy_July31_24.ods

*** attachment:Q1HMSAcceptanceStudy_July31_24.ods

---

h3. July 25, 2024

* Dave's Notes attachment:mtg_24jul25.txt

* Richard

** attachment:KaonLTMeeting7_25_24.pdf

** Q2=2.115 is in line with the other Q2s now. There are still some t-dep and Q2-dep that needs to be figure out to improve ratios.

---

h3. July 18, 2024

* Garth's Notes attachment:mtg_24jul18.txt

* Richard

** attachment:KaonLTMeeting7_16_24.pdf

** New functional form used based off fpi. The transverse term likely needs a |-t| dependence as seen by the ratios.

---

h3. July 11, 2024

* Garth's Notes attachment:mtg_24jul11.txt

* Nathan and Zach

** presented update on the Lumi analysis. attachment:PionLTmeetingjuly112024.pdf

** good news, Carbon is flat. Medium news, funny outliers in the carbon.

* Richard

** attachment:KaonLTMeeting7_11_24.pdf

** Comparison of xsects for Q2=2.115,3.0,5.5 shows a fairly constistent trend across -t, but the ratios are still not satisfactory and a new functional form is likely required.

* Vijay

** The effect of SHMS acceptance variation (±10% of the nominal values of delta, xptar, and yptar) on the separated cross-section is studied.

** attachment:Q1SHMSAcceptanceStudy.ods

---

h3. June 27, 2024

* Garth's Notes attachment:mtg_24jun27.txt

* Richard

** attachment:KaonLTMeeting6_27_24.pdf

** Finding the correct parameterization for Q2=5.5 is still being investigated. A breakdown of the plots and issues in finding a correct one is shown.

* Vijay 

** Added LT and TT in the systematic uncertainty studies.

*** The systematic uncertainties due to the scanning of missing mass cuts and the effects of the radiative tail have been evaluated for the Q² = 0.38 GeV² data.

*** I calculated the RMS of the variation in SigL and SigT for all eight cuts that were scanned, and also compared them with the standard cut. attachment:Q1MMpiCutStudy_June27_24.ods

*** I turned off the radiative tail flag in the SIMC input files for all the kinematics of the Q² = 0.38 GeV² data, and then compared the SigL and SigT values. attachment:Q1RadiativeStudy_June27_24.ods

---

h3. June 19, 2024

* Garth's Notes attachment:mtg_24jun19.txt

* Vijay

** The systematic uncertainties due to the scanning of missing mass cuts and the effects of the radiative tail have been evaluated for the Q² = 0.38 GeV² data.

** I calculated the RMS of the variation in SigL and SigT for all eight cuts that were scanned, and also compared them with the standard cut. attachment:Q1MMpiCutStudy.ods

** I turned off the radiative tail flag in the SIMC input files for all the kinematics of the Q² = 0.38 GeV² data, and then compared the SigL and SigT values. attachment:Q1RadiativeStudy.ods

* Junaid

** Finalized In-plane HeePCoin offsets study.

** Need to implement In-Plane (momentum, energy and angle) offsets with positive sign.

attachment:PionLT_HeeP_Studies_in_plane_offset_Final.pdf

attachment:PionLT_HeeP_Studies_in_plane_offset_plots_Final.pdf

---

h3. June 13, 2024

* Garth's Notes attachment:mtg_24jun13.txt

* Richard

** attachment:KaonLTMeeting6_13_24.pdf

** 0th iteration for Q2=5.5,W=3.02 were shown. The t-range and binning needs to be adjusted, but this Q2 setting is behaving better than 2.115.

---

h3. June 6, 2024

* Garth's Notes attachment:mtg_24jun06.txt

* Junaid

** Finished HMS Cer and Cal efficiency studies.

** Got 0.9981 for HMS Cer and 0.9981 for HMS Cal.

** attachment:PionLT_HMS_Detector_efficiencies.pdf

** Working on HeeP In-Plane Offsets. Did the first comparison.

** Momentum offsets should be applied in 1% unit.

** attachment:PionLT_HeeP_Studies_v1.pdf

** attachment:HeePCoin_Offset_Study_withoffset_v1.pdf

* Richard

** attachment:KaonLTMeeting6_6_24.pdf

** Function form for sigL and sigT were changed. Only small changes seen in sep xsect (only 1 iteration)

** "Globus file sharing information":https://redmine.jlab.org/projects/kltexp/wiki/Globus_File_Sharing

** Ali, Vijay, and I discussed systematics. We will concentrate on pt-to-pt first.

* Vijay

** Pion missing mass scanned for the cut dependence study.

** attachment:Vijay_update_June6_2024.pdf

* Nacer

** Heep coin study for 3.8 GeV and 4.9 GeV.

** attachment:20240606_kaonLT_nacer.pdf

* Ali

** Missing Mass Shape Study for pi-Delta BSA analysis is complete for all kinematics

** attachment:KaonLT_Meeting_June_6_2024.pdf

---

h3. May 23, 2024

* Garth's Notes attachment:mtg_24may23.txt

* Richard

** attachment:KaonLTMeeting5_23_24.pdf

** Iterating on Q2=2.115,W=2.95; still in progress. Kinematic Q2/W vs t plots were fit for both Q2=2.115/W=2.95 and Q2=3.0/W=3.14 to get an idea of their dependence for implimentation on functional forms of xsects.

* Junaid

** Updated beam energy values from Mark's wiki page.

** Got updated Heepcoin In-plane offsets.

** attachment:HeeP_Studies_inplane_offset.pdf

* Nathan

** Checked up on BCM calibration Quadratic correction in BCM2

*** All data with fit parameters from low current fits, no Quadratic term: attachment:refit_bcm2_2021a_noQuad.png, attachment:refit_bcm2_2022_noQuad.png

*** All data with fit parameters from low current fits, with Quadratic term: attachment:refit_bcm2_2021a_Quad.png, attachment:refit_bcm2_2022_Quad.png

*** All data, refit leaving quadratic terms fixed and allowing linear terms to move: attachment:refit_bcm2_2021a_Quad_fit.png, attachment:refit_bcm2_2022_Quad_fit.png

** Nathan's opinion is to use old terms for 2022, and the new terms for 2021

** New lumi scan plots: attachment:Yield_6-4HMS_C.pdf attachment:Yield_6-4SHMS_C.pdf attachment:Yield_9-2pt1_C.pdf attachment:Yield_9-2pt2_C.pdf

---

h3. May 16, 2024

* Garth's Notes attachment:mtg_24may16.txt

* Junaid

** Updated beam energy values from Mark’s wiki page in standard.kinematics.

** Updated the report template files for BCM2 current values.

** Re-calculated the errors for out-of-plane offset. Added systematic error to error calculation.

** Finalized Out-of-Plane Offset got +1.90mr for HMS and -0.07mr for SHMS.

** attachment:PionLT_HeeP_Studies_Out_of_plane_offset.pdf

* Nathan

** posted updated Lumi scan plots:

** attachment:Yield_6-4HMS_C.pdf attachment:Yield_6-4SHMS_C.pdf attachment:Yield_9-2pt1_C.pdf attachment:Yield_9-2pt2_C.pdf

---

h3. May 09, 2024

* Garth's Notes attachment:mtg_24may09.txt

* Vijay

** Cross-section plots for Q^2 = 0.38 GeV^2 data that I made for my thesis. attachment:Vijay_update_May9_2024.pdf

* Richard

** Unseparated and separated cross sections for Q^2 = 3 GeV^2 and W=3.14 GeV. attachment:KaonLT-update-05092024.pdf

* Ali

** Update on pi-Delta BSA analysis. Finished shape study for Q2 = 5.5 and 4.4. Extracted asymmetry for both settings and it's looking very good.

** attachment:KaonLT_Meeting_May_9_2024.pdf

---

h3. May 02, 2024

* Garth's Notes attachment:mtg_24may02.txt

* Richard

** attachment:KaonLTMeeting5_2_24.pdf

** 17 iteration results for Q2=3.0, W=3.14. Parameterization was done with only center data in a t-range of 0.1 to 0.3. Iterations were fit with a 1D fit (removing Q2 dependence).

* Vijay

** LT sep analysis update. attachment:Vijay_May2_2024.pdf

---

h3. April 25, 2024

* Garth's Notes attachment:mtg_24apr25.txt

* Vijay

** Obtained all preliminary four separated cross-section terms at Q2=0.38 GeV2.

** Yield ratio (exp/simc) plots for all three epsilon values are included. 

** Acceptance and kinematics plots (thesis plots) from the center setting at epsilon=0.629 are also provided. attachment:Vijay_Apr25_2024.pdf

** Next Plan for 3-4 Weeks:

*** I have a tight deadline from our FGSR office to complete my thesis.

---

h3. April 18, 2024

* Garth's Notes attachment:mtg_24apr18.txt

* Richard

** attachment:KaonLTMeeting4_18_24.pdf

** I am confident that the output of recon_hcana and data match fairly well and that iterations are the next step to optimize this.

---

h3. April 11, 2024

* Garth's Notes attachment:mtg_24apr11.txt

* Richard

** attachment:KaonLTMeeting4_11_24.pdf

** Mismatch between xptar for data/simc has been resolved by removing RF cut. Offset in t-distribution for data/simc has been resolved by fixing an error in recon_hcana (wrong mass used in detected particle calculation). Fixes to iterations, ongoing.

* Vijay

** Extracted preliminary Sig_L and Sig_T cross-sections

** Working to improve the extracted cross-sections. attachment:Vijay_April_11_2024.pdf

* Nacer

** Final cuts optimized for kaon events selection, detail attachment:20240411_kaonLT_nacer.pdf

---

h3. April 4, 2024

* Garth's Notes attachment:mtg_24apr04.txt

* Nathan

** Update on Lumi, working on set of Lumi data that has BCM calibrated

** Found that we'll need zero current offset and that there were offsets already applied: attachment:lumiUpdate2024-04-04.pdf

*** Full set of plots: attachment:Yield_9-2pt1Carbon.pdf attachment:Yield_9-2pt1Carbon.pdf

* Ali

** Update on pi-Delta BSA analysis. Plots include missing shape study and asymmetry for Q2 = 3.0, W = 3.14 (low t).

** attachment:KaonLT_Meeting_Apr_4_2024.pdf

* Alicia

** Finalizing asymmetry results after error meeting

** attachment:AsymmetryErrors2.pdf

---

h3. April 2, 2024

* Special meeting to discuss BSA uncertainties

* Garth's Notes attachment:bsa_24apr02.txt

* Alicia's slides attachment:Asym_errors.pdf

---

h3. March 28, 2024

* Garth's Notes attachment:mtg_24mar28.txt

* Richard

** attachment:KaonLTMeeting3_28_24.pdf

** SHMS xptar had an odd distribution. Upon further inspection, the RF cut was the cause. There is a correlation between xptar and the RF which must have a path length correction. For KaonLT data (>Q2=0.5), the RF will no longer be used.

* Nacer

** The RF time cut is the most efficient event selection among PID cuts, particularly to select kaons (lambda peak) and suppress pions (neutron peak) for 3.8 GeV and 4.9 GeV kaon LT data, see attachment:20240328_kaonLT_event_selection_nacer.pdf

* Alicia

** Updated asymmetry plots: attachment:Asym_Postuma_Mar28.pdf

* Junaid

** Made HeePCoin plots for offset studies.

** attachment:HeePCoin_Offset_Study.pdf

---

h3. March 21, 2024

* Garth's Notes attachment:mtg_24mar21.txt

* Nathan

** Got lumi script running. Initial plots of lumi: attachment:Yield_9-2C.pdf

** Still need to do alot of bug fixing

* Ali

** Update on pi-delta BSA analysis.

** A comparison b/w SIDIS and RHO is done to see which one fits the data better. SIDIS wins the race since RHO results in a bad fit.

** Will be able to do 2 t-bins for higher statistic data (Q2 = 3.0, W = 3.14)

** attachment:KaonLT_Meeting_Mar_21_2024.pdf

* Alicia

** Implemented delta correction in hcana: attachment:Asym_Postuma_Mar21.pdf

---

h3. March 14, 2024

* Garth's Notes attachment:mtg_24mar14.txt

* Vijay

** Good news, got all yield ratio plots correct.

** Got an Unseparated cross-section.

** Got a Separated cross-section.

** Excited to have the first LT sep plots today. attachment:Vijay_update_Mar14_24.pdf

* Alicia

** Missing mass cut values for asymmetry: MMpi<1.01+/-0.02

** Determined reasonable delta correction

** Trying to compile hcana to implement delta correction there

** attachment:Asym_Mar14.pdf

* Ali

** Preliminary plot for pi-Delta MM shape study (Q2 = 3.0, W = 3.14 center). This includes all the MC with new resolution factor.

** attachment:Q3p0W3p14center_pos.pdf

* Junaid

** Updated ltsep package for PionLT

** Added ngcer variables to ltsep package.

** Updated RF offset for HeePCoin PionLT data

** Updated HeeP Coin scripts.

** Finalized HeePCoin PID cuts.

** attachment:HeePCoin_PID_Study.pdf

---

h3. March 7, 2024

* Garth's Notes attachment:mtg_24mar07.txt

* Nathan

** Made Quick PID efficiency plots for SHMS NIM paper. Found HGC zero bin entries still an issue. "NIMpaperPidPlots.pdf":https://redmine.jlab.org/attachments/2394 

** Without zero bin cut: "SHMS_Pion_PIDeffPlots_16504.pdf":https://redmine.jlab.org/attachments/2395 with zero cut: "SHMS_Pion_PIDeffPlots_16504_v2.pdf":https://redmine.jlab.org/attachments/2396

** Lumi without zero bin cut: "SHMS_Electron_PIDeffPlots_16759.pdf":https://redmine.jlab.org/attachments/2397

* Richard

** attachment:KaonLTMeeting3_7_24.pdf

** Fixed issue with shrinking xsect on each iteration. The issue was a mistake in absolute error being mistaken for relative error when calculating xsect error.\

** Pion subtraction implemented with not much change in xsect beyond lowest t-bins. Smaller t-bins see a 50% reduction with MM cut

** Iteration script works, now just trying to find best parameterization. Particularly for Q2=3.0, W=2.32 where eps_low>eps_hi

* Ali

** SIMC resolution study is complete. The final resolution factor for SHMS DC is 3.5.

** Good agreement between data and MC in each t-bin. Higher Q2 data has better agreement.

** Also checked target quantities with and without resolution tunning. No issues in reconstruction with resultion tunning.

** attachment:KaonLT_Meeting_Feb_15_2024.pdf

---

h3. February 29, 2024

* Garth's Notes attachment:mtg_24feb29.txt

* Richard

** attachment:KaonLTMeeting2_29_24.pdf

** Issue with iteration script where cross section error decreases with each iteration. Still being investigated

** Unseparated cross-section plots are coming along; still work to be done on improving them.

** Interesting sigL/T vs t behavior with lower W values (very tentative)

* Vijay 

** I found an interesting plot of pion and kaon form factors at high Q2 from lattice QCD in the ICTS workshop. The speaker of the talk was Swagato Mukherjee (BNL).  

 attachment:Lattice_form_factor.pdf

* Alicia

** Update on delta correction to missing mass: not necessary in every setting

** Need to determine exactly what correction to apply for HMS momentum > 5.0

** attachment:Postuma_MissMass_Feb29.pdf

* Nacer

** Tracking efficiency quality check finalized for 3.8 GeV and 4.9 GeV data, and the corresponding run lists are updates see the talk attachment:20240229_kaonLT_nacer.pdf

* Junaid

** Selected 9 HeeP Coin settings out of 15 to do HeeP Studies

** Prioritize on the basis of physics momentums and angles settings

** attachment:HeeP_Studies_PionLT.pdf

---

h3. February 22, 2024

* Garth's Notes attachment:mtg_24feb22.txt

* Richard

** attachment:KaonLTMeeting2_22_24.pdf

** Model cross-sections were compared for most of the Q2s. There were several iterations which included a +0.2 term to the t-dependence of sigL. sigT now used the model from Tanja's "global analysis":https://journals.aps.org/prc/pdf/10.1103/PhysRevC.85.018202 which is coming along. Pion subtraction still needs to be incorporated and things should improve further from there.

* Alicia

** Still trying to implement delta correction to missing mass

** attachment:Postuma_MissMass_Feb22.pdf

* Junaid

** Updated DEF file (Included NGC variables)

** Updated DEF-Cut files for HeeP, Lumi, Prod and pTRIG6 data (Included ngcer cuts).

** Generated BCM currents for PionLT data.

** Replayed PionLT data Pass1_v2 (included BCM current params)

** Finalized Tracking Efficiencies for PionLT data (HeeP, Lumi, Prod and pTRIG6) - Removed outliers

** attachment:Efficiency_Studies_PionLT.pdf

---

h3. February 15, 2024

* Garth's Notes attachment:mtg_24feb15.txt

* Garth's GitHub meeting Notes attachment:GitHub_mtg_24feb14.txt

* Richard

** attachment:KaonLTMeeting2_15_24.pdf attachment:dsig_totstaterror_calc.pdf

** Properly Calculated Statistical Uncertainties

*** Ali and I went through and properly implemented statistical uncertainties (double-checked with Garth on Monday). This included updating HMS cerenkov and calorimeter efficiencies that needed to use a "golden singles run" to avoid contamination. A bug in the ratio per bin was fixed so that proper average ratio per bins were found.

** SIMC Aerogel/HGCer geometric cuts were implemented.

** Particle Subtraction Script was updated. Just need pion samples from Ali.

** Beginning Unsep-xsect Systematic Studies

** Continued issues with generating new parameterization

*** Unsep xsect fits are starting to look good, but the script to generate improved parameterization generates insane fits. Likely a change to the model is needed. In particular, sigT will need adjustments.

* Alicia

** Summary of next steps in asymmetry analysis

** Discussion of missing mass using delta correction: unable to reproduce hcana MMpi - learned that this is expected. Will implement a version of Richard's code from recon_hcana 

** Exploring -t dependence of different data and simc files

** Slides: attachment:Asymmetry_Postuma_2024-1.pdf

* Ali

** Update on the SIMC resolution study for Kaon-LT 10.6 GeV data.

** SIMC SHMS DC resolution was tunned to have better agreement b/w data nnd MC. A large resolution multiplication factor of 9 is used. This will hopefully decrease with improvement in data resolution.

** SIMC HMS DC resolution (suggested by Dave G.) doesn't make a huge difference.

** The resolution of MC looked worse than data after t-bining. This will be improved with a lower multiplication factor.

** attachment:KaonLT_Meeting_Feb_15_2024.pdf

---

h3. February 8, 2024

* Garth's Notes attachment:mtg_24feb08.txt

* Richard

** attachment:KaonLTMeeting2_8_24.pdf

** SIMC Weight

*** In order to get Ydata/Ysimc to be even close to unity I needed to divide the SIMC weight by 10^6. I was applying the weight for the histograms but not binned data. 

** SIMC MM

*** The long radiative tail from simc MM has mostly been resolved by using the correct decay length and properly recalculating the MM using recon_hcana.

** MM PID Analysis

*** Played around with MM cuts to see PID of leak through/higher K+ channels.

*** Increasing aerogel cut from aero > 3.0 to > 4.5 should resolve some of the issues, but more probably needs to be done.

** MM cut: Yield Comparison

*** Using an MM cut of 1.10 < MM < 1.18 produced shockingly consistent yields for Q2=2.115

---

h3. February 1, 2024

* Garth's Notes attachment:mtg_24feb01.txt

* Richard

** attachment:KaonLTMeeting2_1_24.pdf

** Dave’s Delta Adjustments

*** Dave's adjustment to HMS delta to correct for the hsxpfp correlation is implimented.

** The weight iteration script is working, but there is an issue with either the SIMC weight or unit charge which is causing me to include a 10^-6 factor in the SIMC weight which messes up the rest of the iteration scripts.

---

h3. January 25, 2024

* Garth/Richard Notes attachment:mtg_24jan25.txt

* Richard

** attachment:KaonLTMeeting1_24_24.pdf

** Issues with dummy runs

*** The dtype error for some dummy runs was caused by empty trees when applying the CT cuts.

*** The source of these fails cuts was because the CT offset applied at the replay level was skipped for these runs and thus the CT peak was not where the cut expected.

** Weird t-distribution

*** Multiple peaks seen in the t-distribution were caused by various particle leakthrough.

*** This was cleaned up a bit by implimenting a HMS cer cut > 1.5, but there are still significant particles that need to be cleaned up.

** Fixed binning issue

*** Issue with the binning script was causing many average kin per bin values to be zero. 

*** The scripts were completely rewritten and things look very nice now.

** Separated Xsects Script

*** Finished debugging the script that separates the cross section. 

*** The binning issue was hiding other FORTRAN related issues, in particular, with the input files that are generated.

** SIMC MM

*** Very broad and long tail on kaon MM generated by SIMC. Still under investigation.

** SIMC High Q2

*** There were negative MM and other variables being generated by SIMC for high Q2 settings.

*** Likely caused by sigT going negative. By setting some of sigT's parameterization to zero, the issue should be resolved. Still under investigation.

* Dave

** HMS delta-hsxpfp correction for KaonLT data 

** attachment:DG_24jan25_hms_hsxpfp.pdf

---

h3. January 11, 2024

* Garth's Notes attachment:mtg_24jan11.txt

* Garth's GitHub meeting Notes  attachment:GitHub_mtg_24jan10.txt

* Richard

** attachment:D1_2024WinterHallCTalk.pdf

** Most bad runs (i.e. those replays/analysis files that failed for various regions) for Q2=2.1 have been properly run. There are still a few outstanding runs that need to be further investigated.

** Equations for the xsect iteration script have been properly adjusted to match those found in the fortran script of SIMC (physics_iterate.f).

** Testing with Q2=2.1 is underway with a minor bug with efficiency calculation that needs to be resolved. Once this is done, this setting will test the xsects iteration and separated xsects scripts.

* Dave 

** HMS delta-hsxpfp correction for P_HMS=5.292GeV/c  attachment:DG_24jan11_hms_hsxpfp.pptx attachment:DG_24jan11_hms_hsxpfp.pdf

---

h3. January 4, 2024

* Garth's Notes attachment:mtg_24jan04.txt

* Nacer: beta SHMS calibration attachment:20240104_kaonLT_nacer.pdf

---

h2. 2023 Meetings

---

h3. December 21, 2023

* Garth's Notes attachment:mtg_23dec21.txt

* Richard

** attachment:FinalHeepOffsets_v3.pdf

*** Updated heep plots without HGCer cuts, very small change (order of ~0.1 MeV). Also updated with almost final efficiencies (missing Hodo uncern).

** attachment:10p6_Prod_2023_12_18.pdf attachment:8p2_Prod_2023_12_18.pdf attachment:6p2_Prod_2023_12_18.pdf attachment:4p9_Prod_2023_12_18.pdf attachment:3p8_Prod_2023_12_18.pdf

*** Plots of efficiencies per energy.

** attachment:heep_yield.pdf

*** Heep yield plots without uncertainty. Statistical uncertainty is done, but systematic needs to be finished.

* Vijay (updated on Dec 27, 2023 (Heep plot))

** The final summary of the lumi and elastic studies in summer 2019 data. attachment:PionLT_Smmer19_Lumi_elastic_Studies_Dec21_2023.pdf

** Next Plan: Physics analysis (LT separation) for Q2 = 0.38 GeV2 in the summer 2019 data.

---

h3. December 14, 2023

* Garth's Notes attachment:mtg_23dec14.txt

* Vijay

** The summary of lumi and elastic studies in summer 2019 data.

** Carbon Relative Yield: shows a flat line with the -0.243/100uA% slope.

** LH2 Relative Yield: shows a slope of -5.06/100uA%.

** Average Elastic Cross-Section: determined to 0.9915+-0.0136. 

** I've compared the study with previous ones. attachment:PionLT_Smmer19_Lumi_elastic_Studies.pdf

** Next plan: Replay the physics data with determined offsets for the physics analysis. 

* Nacer: beta SHMS calibration attachment:20231214_kaonLT_nacer.pdf

---

h3. December 7, 2023

* Garth/Nacer Notes attachment:mtg_23dec07.txt

* Richard

** attachment:FinalHeepOffsets_v2.pdf

** No Offsets: "10p6":https://redmine.jlab.org/attachments/2266 "8p2":https://redmine.jlab.org/attachments/2262 "6p2":https://redmine.jlab.org/attachments/2263 "4p9":https://redmine.jlab.org/attachments/2264 "3p8":https://redmine.jlab.org/attachments/2265

** Offsets: "10p6":https://redmine.jlab.org/attachments/2261 "8p2":https://redmine.jlab.org/attachments/2257 "6p2":https://redmine.jlab.org/attachments/2258 "4p9":https://redmine.jlab.org/attachments/2259 "3p8":https://redmine.jlab.org/attachments/2260

** There was an oversight in the BPM params and they were not pushed to the proper git repo. The offsets had to be redone and the new final offsets are implimented.

** Full Replay Pass 3 is underway.

---

h3. November 30, 2023

* Garth/Nacer Notes attachment:mtg_23nov30.txt

* Nathan

** Update on Coin Reference time cuts: attachment:RefTimes_Update_2023-11-30.pdf

** Cuts decided, quality checks on data and implementation to be done

* Richard

** attachment:KaonLT_FinalHeepOffsets.pdf

** Finalized KaonLT Offsets (including OOP)

** In the process of including new offsets in a new replay batch. Should be finished by the end of the weekend.

---

h3. November 16, 2023

* Garth/Nacer Notes attachment:mtg_23nov16.txt

* Ali

** attachment:KaonLT_Meeting_Nov_16_2023.pdf

** CoinTime / Beta Leakage Study is now finished. Mark's suggestion to change ptof_tolerance variable from 100 to 2 has fixed the bad beta events. The efficiency for 10.6 and 6.2 / 8.2 GeV Heep dta is almost identical. No need to correct for bad beta / CoinTime events.

* Richard

** attachment:KaonLTMeeting11_16_23.pdf

** Fixing the SHMS momentum offset and playing around with some decent offsets for all energies besides 10p6. Final numbers are being determined.

* Vijay

** The 'Out of Plane offset' for the summer 2019 data has been comprehensively examined and verified. 

** It has proven to be highly effective in addressing the pmy variables of the summer 2019 dataset. attachment:Heep_pmy_summer19_offset.pdf

---

h3. November 9, 2003

* Garth/Nacer Notes attachment:mtg_23nov09.txt

* Richard

** attachment:KaonLTMeeting11_9_23.pdf

** A variety of heep offsets were applied, provided by Garth's global results. It is shown that adapting the 5 beam energy global offsets with varying the SHMS momentum offset allows for the best emiss peak positions.

** OOP offsets are also looked at, but there is an obvious issue with their implementation that needs to be resolved.

* Garth

** PMY fit to determine OOP offsets, for 3 different sets of beam energies attachment:offset_pmy2c.pdf

---

h3. November 2, 2023

* Garth/Nacer Notes attachment:mtg_23nov02.txt

* Richard

** attachment:KaonLTMeeting11_2_23.pdf

** Garth's global high energy offsets were applied. There is a shift in emiss with dpp offset of -0.1%

---

h3. October 24, 2023

* Richard/Tanja/Dave Notes attachment:mtg_23oct24.txt

---

h3. October 17, 2023

* Garth/Nacer Notes attachment:mtg_23oct17.txt

* Richard

** "kaon_xsects_Q2p1W2p95":https://redmine.jlab.org/attachments/2210

** By setting the parameters for the interference terms to zero, the spike in data between 220-300 deg has been removed, and all ratios are within ~10. The weight iteration script is being debugged and thoroughly checked.

* Vijay

** The testing of global fitting parameters (offsets) for the summer 2019 data (Garth study) has been completed. 

** It has been determined that employing a single set of offsets for all energies within the summer 2019 dataset does not adequately address all variables.

** Nonetheless, the W variable exhibits a strong agreement with the SIMC for energies of 2.7 and 4.5 GeV. However, at 3.6 GeV, a slight over-correction is observed.

** attachment:Vijay_Oct17_23.pdf

---

h3. October 16, 2023

* "Notes from Cointime Leakage Meeting":https://redmine.jlab.org/attachments/2211

** Attendance: Alicia P., Ali U., Garth H., Richard T.

---

h3. October 10, 2023

* Garth/Nacer Notes attachment:mtg_23oct10.txt

* Richard

** attachment:KaonLTMeeting10_10_23.pdf

** As expected, the bifurcation seen in the CT vs beta (E=10.6) is almost non-existent when kaon PID cuts are applied. This is likely due to the lower statistics compared to what Alicia showed with pion PID. A correction should be applied regardless which will determined by the pion data.

---

h3. October 3, 2023

* Garth/Nacer/Richard Notes attachment:mtg_23oct03.txt

* Richard

** attachment:kaon_xsects_Q2p1W2p95.pdf

** There are some issues with the Right SIMC setting returning zeros, which is part of the cause of the odd values. This is still being debugged, it is unclear if this is a binning or simc issue.

* Plots from post-meeting on CoinTime "leakage"

** attachment:cointime_mmpi_10p6.pdf

** attachment:heep_coin_time_10p6.pdf

** attachment:ctime_vs_beta.pdf

** attachment:cointime_beta_10p6.pdf

---

h3. September 26, 2023

* Garth/Nacer Notes attachment:mtg_23sep26.txt

* Richard

** attachment:kaon_unsep_xsects_Q2p1W2p95.pdf

** Fixed issues with the binning. Adapting parameter optimization code for iterating weights of SIMC

** Ratio for low eps of 2.1 looks good (all within 0.1-2.0), but high eps is all over the place.

* Alicia

** Explored coin time: interesting feature depends on missing mass

** attachment:log_ctime.pdf dark blue: no MM cut, green: loose MM cut, red: tight MM cut

** attachment:mmcointime.pdf 2D plot of coin time vs MM

---

h3. September 19, 2023

* Garth/Nacer Notes attachment:mtg_23sep19.txt

* Alicia

** Finalizing asymmetry analysis: three unresolved questions on PID/event selection

** attachment:Asymmetry_Postuma_Sep16.pdf

---

h3. September 12, 2023

* Garth/Nacer Notes attachment:mtg_23sep12.txt

* Follow-up meeting on LTsep procedure attachment:LTsep_mtg_23sep13.txt

---

h3. September 07, 2023

* Garth/Nacer Notes attachment:mtg_23sep07.txt

* Vijay

** SHMS hodoscope individual bar efficiency (pion) studied (Efficiency vs Run Number and Efficiency vs Coin trigger Rate) for all the production Runs. attachment:Vijay_Sep07_2023.pdf

* Richard

** "HMS Current Carbon":https://redmine.jlab.org/attachments/2118

** "HMS Current LH2":https://redmine.jlab.org/attachments/2119

** Finalized slopes for luminosity analysis from linear regression of HMS electron data from carbon and LH2. Carbon is flat (m0=1.688e-05±4.305e-04) and LH2 has a slope of ~8%+/-2% (m0=-7.899e-04±1.829e-04)

* Alicia

** Preliminary Q2 scan: attachment:Scan_prelim.pdf

---

h3. August 31, 2023

* Garth/Nacer Notes attachment:mtg_23aug31.txt

* Richard

** attachment:KaonLTMeeting8_31_23.pdf

** "Regression HMS carbon current":https://redmine.jlab.org/attachments/2072

** "Regression HMS carbon rate":https://redmine.jlab.org/attachments/2074

** "Regression HMS LH2 current":https://redmine.jlab.org/attachments/2071

** "Regression HMS LH2 rate":https://redmine.jlab.org/attachments/2073

** "Regression SHMS carbon current":https://redmine.jlab.org/attachments/2075

** "Regression SHMS carbon rate":https://redmine.jlab.org/attachments/2076

** "Regression SHMS LH2 current":https://redmine.jlab.org/attachments/2077

** "Regression SHMS LH2 rate":https://redmine.jlab.org/attachments/2078

** Luminosity analysis is finally complete. Results are consistent with Carlos Yero!

* Alicia

** Binning Monte Carlo: attachment:Asymmetry_Postuma_BinMC2.pdf

* Garth

** In-plane offset global constrained fit attachment:results_summary_23aug28.txt

** Out-of-plane offset plot attachment:offset_oop.pdf

---

h3. August 24, 2023

* Garth/Nacer Notes attachment:mtg_23aug24.txt

* Vijay

** All efficiencies for the PionLT summer 2019 data, that are required for the cross-section study, have been studied. attachment:Vijay_update_Aug24_2023.pdf

** Starting soon the elastic cross-section study for the finalization.

---

h3. August 17, 2023

* Garth's Notes attachment:mtg_23aug17.txt

* Alicia

** Several updates: pi-delta BSA and binning for pi-neutron analysis

** attachment:Asymmetry_Postuma_PiDelta.pdf

** attachment:Asymmetry_Postuma_Binning2.pdf

** Also discussion of error analysis: will use unsimplified version of asymmetry error.

* Nathan

** Slides from conlsion of hgcer calibration https://redmine.jlab.org/attachments/2063

---

h3. August 10, 2023

* Garth's Notes attachment:mtg_23aug10.txt

* Richard

** attachment:KaonLTMeeting8_10_23.pdf

** t/phi binning of kinematics is looking a bit odd. The procedure is broken down here.

* Alicia

** Working on binning data for pi-neutron asymmetry

** attachment:Asymmetry_Postuma_Binning1.pdf

---

h3. July 27, 2023

* Garth's Notes attachment:mtg_23jul27.txt

---

h3. July 20, 2023

* Garth's Notes attachment:mtg_23jul20.txt

* Vijay

** The HMS calorimeter efficiency study is completed from all the ‘Heep coin data’ (3 beam energy) of the summer 2019 run period. attachment:Vijay_July20_2023.pdf

** The final number of this is *{color:green}@0.9979 ± 4.004e-05@*.  

* Richard

** "kaon_FullAnalysis_Q5p5W3p02_lowe":https://redmine.jlab.org/attachments/2028 "kaon_FullAnalysis_Q5p5W3p02_highe_no_hgcer_cut":https://redmine.jlab.org/attachments/2030 "kaon_FullAnalysis_Q5p5W3p02_highe":https://redmine.jlab.org/attachments/2029

** Peter's kaon PID suggestions are implemented, and the samples are almost there. These include aero>4, RF>+/-0.5, hgcer hole cut. Note: these are with just the spring hole cut (for testing). The proper fall hole cut will be added soon.

---

h3. July 13, 2023

* Garth's Notes attachment:mtg_23jul13.txt

---

h3. July 6, 2023

* Garth's Notes attachment:mtg_23jul06.txt

* Vijay

** The HMS Calorimeter efficiency study from all the production data at Q2 = 0.38 GeV. attachment:Vijay_July6_2023.pdf

---

h3. June 28, 2023

* Garth's Notes attachment:mtg_23jun28.txt

* Richard's Notes from meeting with Peter attachment:peter_mtg_23jun25.txt

* Vijay

** EDTM Live Time testing for the Lumi study from summer 2019 data is done.

** attachment:Vijay_KaonLT_meeting_Jun28_2023.pdf

* Richard

** attachment:KaonLTMeeting6_28_23.pdf

** Incorporated Peter (and other's) bcm correction. Some things look better, but there are issues with some TLT values, which is throwing yields off. 

---

h3. June 22, 2023

* Garth's Notes attachment:mtg_23jun22.txt

* Richard

** attachment:KaonLTMeeting6_22_23.pdf

** Adjusted aerogel cut for kaons to 3.0 from 1.5 because of a suggestion by Peter. This eliminates a bit more protons that slip through.

---

h3. June 15, 2023

* Dave's Notes attachment:mtg_23jun15.txt

---

h3. June 8, 2023

* Dave's Notes attachment:mtg_23jun08.txt

* Richard

** attachment:KaonLTMeeting6_8_23.pdf

** Linear regression for production also includes higher rates (>1kHz) and things still look fine.

** LH2 needs cuts to be adjusted, things are pretty off for now. 

* Alicia

** attachment:Asymmetry_Postuma_Updates_2023.pdf

** Errors, models for BSA analysis

* Nathan

** Finished Noble gas calibration attachment:CalibUpdate_2023-06-15.pdf

** Uploaded slides from previous update, with a few extra plots that I had 

---

h3. June 1, 2023

* Dave's Notes attachment:mtg_23jun01.txt

* Richard

** attachment:KaonLTMeeting6_1_23.pdf

** Linear regression for coincidence runs were compared to the singles luminosity runs. The slope for the coincidence is approximately an order of magnitude better than the singles.

---

h3. May 25, 2023

* Garth's Notes attachment:mtg_23may25.txt

* Vijay

** HMS Calorimeter efficiency study at Q2 = 0.38 GeV2, for all production and heep coin data. attachment:Vijay_May25_2023.pdf

** We discussed in our group meeting that it should be ok to take error weighted average of all the heep coin data and then correct the production data. 

* Alicia

** Missing mass by bins - added delta: attachment:mm_simcdata2.pdf

---

h3. May 18, 2023

* Garth's Notes attachment:mtg_23may18.txt

* Ali

** Out of Plane offset study from KaonLT Heep Coindata using Tanja's method.

** attachment:KaonLT_Meeting_May_18.pdf

* Vijay

** Raster checks of the summer 2019 data. attachment:Raster_check_summer19.pdf

** I checked the Raster for the summer 2019 data. It looks ok to me. I did not see any slightly tilting issues that Ali saw earlier.

** I do not think that we will need to make any changes to the Raster in the summer 2019 data. 

** Please check the attached file and let me know if you have any concerns of the study. 

* Richard

** attachment:hms_regression_current_carbon.pdf ,attachment:hms_regression_rate_carbon.pdf , attachment:shms_regression_current_carbon.pdf , attachment:shms_regression_rate_carbon.pdf

** I did a least square linear regression on all the luminosity data. There is a good consistency between all data settings and even HMS and SHMS.

---

h3. May 11, 2023

* Dave's Notes attachment:mtg_23may11.txt

* Richard

** attachment:KaonLTMeeting5_11_23.pdf

** Carlos and I found the error in the HMS scaler rate and slope. I was previously doing some testing of ELREAL vs ELCLEAN and I never reverted my testing from ELCLEAN. Once I changed the variable back to ELREAL, the rates and trends match.

* Vijay

** HMS Calorimeter efficiency study. attachment:Vijay_May11_2023.pdf

** It looks like the efficiency is less from the production data (Q2 = 0.38 GeV2, High e).

** I'll take a look at the heep coin data in this run period of the experiment and get the efficiency. 

** Hopefully that's number, the efficiency from heep coin data, will be reliable to correct the inefficiency of the detector and correct the data run by run.

* Ali

** Raster Y sign test. Original sign was working fine.

** attachment:KaonLT_Meeting_May_11.pdf

* Alicia

** Updates on BSA analysis

** attachment:Asymmetry_Postuma_May1.pdf

---

h3. May 4, 2023

* Garth's Notes attachment:mtg_23may04.txt

* Richard

** attachment:KaonLTMeeting5_4_23.pdf

** Most of the bad runs have been resolved although there are still a few issues I am sorting out. I also have some plots of the boiling corrections that need to be updated.

** I talked with Jacob last week and he checked my luminosity calculations and they seem fine. Carlos and I are meeting tomorrow at 11 am to try and figure out our discrepancies.

** Found a possible cut issue with the proton peak where cuts were not being properly applied. This is still early in checks.

* Ali

** BPM calibration check. Using new file for Spring 2019 data.

** attachment:KaonLT_Meeting_May_4.pdf

* Alicia

** Missing mass by bins - added SIMC: attachment:mm_simcdata1.pdf

---

h3. April 27, 2023

* Garth/Stephen Notes attachment:mtg_23apr27.txt

* Vijay

** Updates of the analysis are attached. attachment:Vijay_Apr27_2023.pdf

* Richard

** attachment:KaonLTMeeting4_27_23.pdf

** There are still issues with the TLT for some carbon lumi runs. Jacob and I are meeting tomorrow to discuss things.

** Pion subtraction have improved things a lot, but there seems to be issues with the proton subtraction. Adjusted cuts are rerunning and will hopefully help.

---

h3. April 20, 2023

* Garth/Stephen Notes attachment:mtg_23apr20.txt

* Nathan - Presented updates on the aerogel calibration. attachment:AerogelCalib_2023-04-20.pdf

** looks like the calibration has significantly improved the separation between signal and zeros.

** for completeness here are all the presentations that Petr gave on the aerogel calibration. attachment:presentation-2020-09-23-kaonlt.pdf attachment:presentation-2020-09-23-kaonlt-summary.pdf

---

h3. April 13, 2023

* Garth's Notes attachment:mtg_23apr13.txt

* Vijay

** The details of the update are attached here. attachment:Vijay_Apr13_2023.pdf

* Ali

** Pion PID study for high Q2 KaonLT data.

** Spring 2019 data (low e) attachment:KaonLT_Meeting_Apr_13.pdf

---

h3. April 6, 2023

* Garth/Stephen Notes attachment:mtg_23apr06.txt

* Richard

** attachment:KaonLTMeeting4_6_23.pdf

** "10p6 c #1":https://redmine.jlab.org/attachments/1841 "10p6 LH2 #1":https://redmine.jlab.org/attachments/1843

** "10p6 c #2":https://redmine.jlab.org/attachments/1840 "10p6 LH2 #2":https://redmine.jlab.org/attachments/1844

** "10p6 c #3":https://redmine.jlab.org/attachments/1842 "10p6 LH2 #3":https://redmine.jlab.org/attachments/1845

** "8p2 c #1":https://redmine.jlab.org/attachments/1838 "8p2 LH2 #1":https://redmine.jlab.org/attachments/1839

** Luminosity plots are looking pretty good for LH2 and Carbon. There are a few runs with really bad TLT that need to be resolved.

** I still need to meet with Carlos to figure out HMS scaler issue.

** In the process of subtracting proton events from MM for kaon to try and clean up the right setting (update next week).

---

h3. March 30, 2023

* Garth/Stephen Notes attachment:mtg_23mar30.txt

* Vijay

** Switched the pion routine in SIMC for the pion cross-section.

** Re-ran SIMC to simulate the p(e, e’π+)n reaction for all the settings of Q2 = 0.38 GeV2 data.

** More details are in the talk. attachment:Vijay_KaonLT_meeting_Mar30_2023.pdf

---

h3. March 23, 2023

* Garth's Notes attachment:mtg_23mar23.txt

* Carlos

** relative yields rate dependence

https://hallcweb.jlab.org/DocDB/0012/001209/001/rate_dependence_slides_cyero_Mar09_2023.pdf

** event types definitions

https://hallcweb.jlab.org/DocDB/0012/001208/001/event_type_definitions_COIN_DAQ_cyero_Mar16_2023.pdf

* Ali

** Pion PID study for high Q2 data. This update shows Q2 = 2.1, low e (center) setting. attachment:KaonLT_Meeting_Mar_23.pdf

* Richard

** attachment:

** Carlos and I discussed some oddities in a comparison of our lumi scaler results for the HMS.

** "Added quick script to check cuts applied in ltsep python package.":https://github.com/JeffersonLab/UTIL_KAONLT/blob/spring_2022/check_cuts.sh This requires the most update version of the ltsep package, but can be easily downgraded. (just let me know if interested)

** Alicia, Ali, and I are meeting tomorrow at 2:30 to discuss the odd right setting peaks.

---

h3. March 16, 2023

* Garth/Stephen Notes attachment:mtg_23mar16.txt

* Richard

** attachment:KaonLT_Meeting_3_16_23.pdf

** Carlos has been working on the rate dependence issue for the luminosity scans that Casey and I have been seeing. He came to a similar conclusion as me that there will need to be a correction factor that we all agree on that will need to be applied. We are meeting on Monday to discuss things further. "See his slides on the docDB":https://hallcweb.jlab.org/doc-private/ShowDocument?docid=1206

** I think I have tracked down the odd issues with right setting that I have been seeing for most energies. I am not sure why, but it seems that something is going wrong with the replays. I tried rerunning them, but the issue has persisted. My initial guess is that it may be an issue with the TDC cuts, since the coin time distributions were looking off previously. 

* Nathan

** presented recent updates on the Aerogel calibration: attachment:AerogelCalib_2023-03-16.pdf

** will make multiple calibrations based on PMT4+ dependance

---

h3. March 09, 2023

* Garth/Stephen Notes attachment:mtg_23mar09.txt

* Nathan

** Presented the an update to the aerogel calibration, including a 3 year old presentation from Petr

*** presentation attachment:presentation-2020-09-23-kaonlt-summary.pdf

** Also working on the anomalous LD- setting. Things not making sense. Requesting back up.

---

h3. March 02, 2023

* Garth's Notes attachment:mtg_23mar02.txt

* Richard

** attachment:KaonLTMeeting3_2_23.pdf

** Heep SIMC to hcana script is working for missing momentum and energy variables. "Heep 10p6":https://redmine.jlab.org/attachments/1763 "Heep 8p2":https://redmine.jlab.org/attachments/1759 "Heep 6p2":https://redmine.jlab.org/attachments/1760 "Heep 4p9":https://redmine.jlab.org/attachments/1762 "Heep 3p8":https://redmine.jlab.org/attachments/1761

** Fortran scripts for finding average kinematic values and cross sections is working. "Q2=5.5, W=3.02, high eps":https://redmine.jlab.org/attachments/1767 "Q2=5.5, W=3.02, low eps":https://redmine.jlab.org/attachments/1766

** My yield ratios are looking a very weird, more investigation is required. "Ratio and xsects for Q2=5.5, W=3.02, low eps":https://redmine.jlab.org/attachments/1765

* Vijay

** MMpi cut updated.

** 8th t-bin adjusted.

** Events per t-bin calculated for each epsilon setting.

** Experimental Yield calculation in each bin is done.

** More details of the update are in the slides. attachment:KaonLT_meeting_March02_2023.pdf

---

h3. Feb 23, 2023

* Garth/Stephen Notes  attachment:mtg_23feb23.txt

* Ali

** Update on HMS Cherenkov and Calorimeter efficiency study. attachment:KaonLT_Meeting_Feb_23.pdf

** Looking at wide range of Heep Singles settings from KaonLT data (primarily low e data).

---

h3. Feb 16, 2023

* Garth/Stephen Notes attachment:mtg_23feb16.txt

* Vijay

** Updated the diamond cut for Q2 = 0.38 GeV2 data.

** t resolution checked from the center setting of SIMC at low epsilon.

** Binned the data in t (total 8 bins).

** t resolution checked for each t bin too.

** Working to bin the data in Phi (16 bins).

** Working to make the Fortran scripts (average_ratios.f, average_kinematics.f & calc_xsect.f) for the summer 2019 data. attachment:KaonLT_meeting_Feb16_2023.pdf

---

h3. Feb 9, 2023

* Garth/Stephen Notes attachment:mtg_23feb09.txt

* Ali

** attachment:KaonLT_Meeting_Feb_09.pdf

** HMS Cerenkov and Calorimeter Study for different kinematics settings.

* Richard

** attachment:KaonLTMeeting2_9_23.pdf

** Fixed the odd right distribution for Q2=5.5 by applying more strict cointime cuts.

** SIMC c++ code is finishing up. It currently just updates pmx, pmy, pmz, pm, and em with the hcana version of calculations. Angles will be the next step once things are finished up.

---

h3. Feb 2, 2023

* Garth/Stephen Notes attachment:mtg_23feb02.txt

* Richard

** attachment:KaonLTMeeting2_2_23.pdf

** The simc portion of the LT_analysis code is working but there is a bug I am sorting out which produces incorrect plots

** During a discussion Ali, Vijay, and I had, it was realized that another script is likely missing which I will discuss with Bill. This script is one that combines the phi settings for the fortran code.

** Dave and I met to go over the fixed variable implementation in SIMC. We fixed a few issues which I am in the process of fixing.

* Vijay

** Update from the analyzed low epsilon data of Q2 = 0.38 GeV2. attachment:KaonLT_meeting_Feb2_2023.pdf

* Alicia

** Preliminary asymmetry results: Q2=3/W=2.32, Q2=4.4/W=2.74, Q2=2.115/W=2.95, aluminum

** attachment:Asymmetry_Postuma_Feb2.pdf

---

h3. Jan 26, 2023

* Stephen's Notes attachment:mtg_23jan26.txt

* Richard

** attachment:KaonLTMeeting1_26_23.pdf attachment:FullAnalysis_Q5p5W3p02_highe.pdf

** LT_analysis script is finishing up. I have the SIMC portion just about working now. I have some other things I am adding because of my conversation with Bill last week.

** SIMC vs Data plots for Q2=5p5 show a very small SIMC. Need to investigate further.

* Nathan

** attachment:RefTimes_Update_2023-01-26.pdf 

** Asked Carlos Yero about the cointime ref times, he sent me an older email chain attachment:ref_times_email_exchange.txt

*** only SHMS variables are used.

** Presented ref times plots, and suggested cuts.

*** Cuts are already set up and pull request is sent to LTSep_Analysis_2022 branch

---

h3. Jan 19, 2023

* Garth/Stephen Notes  attachment:mtg_23jan19.txt

* Ali

** Looking at HMS Calorimeter and Cherenkov Efficiency and PID. attachment:KaonLT_Meeting_Jan_19.pdf

* Vijay

** attachment:Vijay_Jan19_2023.pdf

** Trying to understand the pion cross-section across the acceptance. 

* Alicia

** attachment:Asymmetry_Postuma_Updates-6.pdf

** Added dummy target subtraction to asymmetry calculation

** Discussed fitting to extract cross-section ratio

** Requested: details on error calculations: attachment:Asymmetry_Errors.pdf

* Richard

** attachment:KaonLTMeeting1_19_23.pdf

** Implemented Jacob's diamond cut script into the setup before Bill's code. This also does the t-binning as well.

** There was missing code for the SIMC implementation which has been found. I am meeting with Bill tomorrow 1/20 to discuss this implementation. Once this is complete, everything is in place to run the Fortran code to get average kinematics and unsep cross sections.

* Nathan

** Started working on reference times

** has some extra peaks in some runs

*** Should be explained by the triggers on in each run

** attachment:RefTimes_Update_2023-01-19.pdf

----

h3. Jan 4, 2023

* Garth's Notes attachment:mtg_23jan04.txt

* Ali

** attachment:Jan4_KLT_Meeting.pdf

** All Kaon_LT data has been replayed over the holidays. Slide show list of major changes for the replay.

---

h2. 2022 Meetings

---

h3. Dec 21, 2022

* Garth/Stephen Notes attachment:mtg_22dec21.txt

* Richard

** attachment:KaonLTMeeting12_21_22.pdf

** SIMC code was updated to match what is in hcana, using hcana and parts of Carlos' code as a template. Things do not look right though. 

** We are a month behind at this point and Bill has finally responded to my questions so I am going to fully concentrate on getting cross sections before the Hall C collaboration meeting in January so that Nathan can present them. I am setting a soft deadline of January 6th to get him early results but will continue to push for cross sections by the talk.

---

h3. Dec 14, 2022

* Garth/Stephen Notes attachment:mtg_22dec14.txt

---

h3. Dec 7, 2022