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Analysis Timeline

Currently working on:

Attempting to fix the --old-specialtrigger build flag issue, to remove the dependency on the framaework's file.

  • Everything works as expected if you comment out the OLD_SPECIALTRIGGER block as described in the analysisbuild.txt readme file and replace it manually with whichever trigger you want to use (either works or complains that you're using the wrong one at runtime).
Generating a Kμ2 normalisation sample to compare the ππ0 and μ+ν normalised branching ratio values, to determine if anything has been missed in the systematics.
  • Step 1: Start generating a sample of Kμ2 data with PNN like cuts from one burst (current file) and organise some output histograms [in progress]
    • Write a new tree to group useful output [done along with a new function in the code]
    • Still to get started on PNN like cuts [ongoing]
  • Step 2: Test on 100 bursts with HTCondor (Stoyan will send me the instructions readme and associated codes when required)
    • Refine cuts and output histograms etc...
  • Step 3: Run on 1k bursts (average run) with HTCondor to try and get some good results
    • e.g. the number of kaon decays for Kμ2
  • Important: The acceptance of each decay has to be studied carefully as not all elements cancel, so everything has to be considered for how it could affect the acceptance with respect to the other decay (PNN or Kμ2)

Possible future work:

Parallel MC work: [no further information on this as of yet]

  • Altering the Geant4 setup to change the hadronic interaction probability in GTK3 to 1
  • Generating on the order of 100M events
  • Comparing with data
  • Aim: to make an estimation of this background for the PNN errors


Generating a Pnn sample from the Kaon code given to me by Giuseppe.

  • Build fails due to class conflict in the public directory files
    • Solution: fixed manually by Giuseppe in the codes, largely by replacing the conflicting "Particle" class with "MyParticle"
  • Further run fails due to a special trigger issue not dependent on the build flag
    • Solution: a special trigger element of the code needs changing when swapping between MC and data files
  • Now working on afs and should be able to set up on any other system (copy placed in: userDir2)
A test analyser, to understand how to generate an analyser from scratch and plot variables in the data files, using the framework as a basis.
  • This analyser is now setup such that it builds and begins to run with the current setup, designed to record the number of spectrometer candidates, but it fails at runtime due to an issue with a special trigger which is not specifically used in the code.
    • Solution: frameworks are not yet completely backwards compatible, I need to use the --old-specialtrigger flag after "build" to get this to work *
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Topic revision: r2 - 2017-11-22 - ConnorGraham
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