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Kaon-LT Experiment »

Analysis Tasks

Fall 2018/Spring 2019 Run Completed
Calibrations Completed
Efficiencies and offsets Ongoing
First iteration of cross section On deck
Fine tuning cross section iteration To Do
Form factor extraction To Do

This is a summary page with the progress of the KaonLT experiment. Above is a quick outline of our current progress. Below are tasks assigned to members of the group. Anyone who is part of the group may contribute to a task with suggestions and/or updates on progress. Please contact the assignee on a task-by-task basis for any queries. Anyone with general questions can contact Richard Trotta ().

Ongoing

Problematic Runs

Run Number Kinematics Issue Current Status

Complete by Early September 2022

Efficiencies Early August 2022

Luminosity Early August 2022

  • Richard, Ali
    • LH2 boiling tests
    • PID track studies
    • PID calibration is good besides the HODO (need pionLT)
    • Vijay has done some coin time studies which will be helpful
    • Richard has analyzed most of the carbon data but need to update scripts with pionLT fixes to TLT and tracking

Elastics Early August 2022

  • Richard, 10.6 data TODO
  • Ali, 8.2/6.2 data TODO
  • Vijay, 3.9/4.9 KaonLT data and 2.7/3.6/4.5 PionLT data Done
  • singles
    • Initial Heepcheck offset fitting to get corrected E, E', theta'.
    • 3.9 GeV, 5 settings Done
    • 4.9 GeV, 4 settings Done
    • 2.7 GeV, 3 settings Done
    • 3.6 GeV, Done
    • 4.5 GeV, Done
    • Overall this study looks ok. At the moment, I've not applied the various corrections to the normalized yield.
  • coin
    • Initial Heepcheck offset fitting to get corrected E, E', theta'.
    • 3.9 GeV Done
    • 4.9 GeV Done
    • 2.7 GeV Done
    • 3.6 GeV Done
    • 4.5 GeV Done
    • Overall this study looks ok (better than singles). At the moment, I've not applied the various corrections to the normalized yield.

Heepcheck offsets Early October 2022

  • Richard/Ali/Vijay
  • Check that Heepcheck offsets produce consistent p(e,e'K+)L, p(e,e'pi+)n p(e,e'p)omega missing masses.

Implementation of Bill's Cross-section Code Early October 2022

  • Richard
  • Incorporate Bill's L/T separation code into our current framework

Check stability of cointime peak ???

  • Vijay
    • A previous study has been done by Vijay, need more info
  • In Fpi-2 it drifted with TDC temperature and needed to be adjusted on a run-by-run basis to within 200 ps.
  • Initial checks so far indicate the peak is stable. Cointime resolution will be poorer in fall 2018 run due to DAQ cabling issue. Mark has partial software fix that we need to be sure is implemented.

SHMS and HMS Optics Improvements ???

  • Mark Jones
  • SHMS
  • HMS, unsure

On deck

Complete by Early January 2023

Initial ep elastic cross-section checks Early November 2022

  • Richard/Ali/Vijay
  • Singles cross-sections, HMS and SHMS. SHMS delta scans (only peak position checked so far, stability of normalized yield ratio not yet checked). Coin ep cross-sections.
  • In Fpi-2, determing the correct proton absorption correction for normalized required some literature review and other digging.

Replays

FULL REPLAY 1 of data, with new calibrations Done

  • This replay should include all new kinematic offsets, better timing and PID calibrations, as well as Mark's most recent HMS and SHMS matrix elements.
  • Quality control rechecks with new replay:
    • carbon luminosity scans are flat vs. current and rate
    • LH2 luminosity scans are flat vs. current and rate
  • HMS saturation corrections?
  • Final investigation of SHMS acceptance, optimize acceptance cuts based on sieve-slit run analysis, agreement with single-arm MC.
    • Compare data and simulation plots of SHMS yfp,ypfp for various ytar,delta bins to identify inconsistencies.
  • Trigger blocking studies.
    • Are extra factors needed to correct for missing FADC reference times, or any other DAQ related effects? Initial info from Peter Bosted indicates this is likely to be the case.
  • Recheck Heep singles and coin yields to identify and fix problems.
  • Stability checks. Need some scripts to look at invariant mass vs run number, etc., for pi+/K+/p channels.

FULL REPLAY 2 of data, Post-PionLT with updated scripts Done

  • This replay should include all new kinematic offsets, better timing and PID calibrations, as well as Mark's most recent HMS and SHMS matrix elements.
  • HMS saturation corrections?
    • Compare data and simulation plots of SHMS yfp,ypfp for various ytar,delta bins to identify inconsistencies.
  • Trigger blocking studies.
    • Are extra factors needed to correct for missing FADC reference times, or any other DAQ related effects? Initial info from Peter Bosted indicates this is likely to be the case.
  • Recheck Heep singles and coin yields to identify and fix problems.
  • Stability checks. Need some scripts to look at invariant mass vs run number, etc., for pi+/K+/p channels.

FULL REPLAY 3 of data, with improved optics and corrections Mid-August 2022

  • SECOND LEVEL ANALYSIS TASKS with REPLAY 3 ntuples:
    • Quality control rechecks with new replay:
      • carbon luminosity scans are flat vs. current and rate
      • LH2 luminosity scans are flat vs. current and rate
    • Final investigation of SHMS acceptance, optimize acceptance cuts based on sieve-slit run analysis, agreement with single-arm MC.
    • Final SHMS optic matrix element and acceptance determination.
    • Final HMS optics check.
    • Final Heepcheck offsets.
    • Better detector efficiency determination.
    • First check of Bill's L/T separation code.

FULL REPLAY 4 of data, with final calibrations and offsets Early January 2023

  • THIRD LEVEL ANALYSIS TASKS with REPLAY 4 ntuples:
    • Final ep elastic cross-section checks.
    • Look at data in depth, and resolve outstanding problems.
    • First SIMC ntuple generation using new offsets.
    • Detailed Data/SIMC comparisons for HMS and SHMS focal plane and target reconstructed quantities, as well as W, Q^2, t, phi.
    • Preliminary L/T separation results.

FULL REPLAY 5 of data, with outstanding problems resolved Early April 2023

  • ADVANCED ANALYSIS TASKS with REPLAY 5 ntuples:
    • Final SIMC ntuple generation using final parameters.
    • Thorough look at L/T/LT/TT separations, consistency checks as necessary.
    • Final look at systematic error contributions.

FULL REPLAY 6 of data Early June 2023

  • Hopefully not necessary
  • OBTAIN:
    • Separated cross-section results.
    • Form factor determination begins. Model systematic error tests. Use more than one model, if at all possible.
    • Model dependence and other issues in form factor extraction.

Begin thesis writing, drafts of first papers

Completed

BCM calibrations Done

Beam Energy calibrations Done

  • Mark Jones
    • This page incorporates May/2019 problem fix that caused to give wrong
      beam energies

Python analysis scripts Done

  • Richard/Stephen
  • 1 , 2

Timing windows and reference times Done

  • Richard/Stephen
  • This was completed for hodoscopes, drift chambers by Richard/Stephen. Every HMS/SHMS channel needs to be re-done for the new hcana code.

RF time for SHMS PID Done

  • Stephen
  • 1-Apr-2020 Update
    • Still need to set RF gates for each particle type, apply TOF corrections for particles other than pion,
      check offsets for other settings.

Calibrations Done

  • Aerogel
    • Vladimir/Richard
    • Redmine lists calibration completed by Vladimir. Need a link to the report. Cuts, PID analysis, efficiencies, not yet done.
  • HGCer
    • Garth/Vijay
    • New calibrations almost done. Report in progress. A position dependent efficiency for pi+ and K+ will have to be implemented. This is not yet started.
  • Hodoscope
    • Vijay/Ali
    • The second band is alright to keep for now until we tighten our time windows. Then the calibrations will need to be redone. This will not be until efficiencies are well established.

SHMS tracking algorithm optimization and efficiencies Done

EDTM Done

Updated by Richard Trotta almost 2 years ago · 174 revisions