test: Test field invariance of direction uncertainty transport

[andiwand]

This is testing a suspicion I had about direction uncertainty transported with and without magnetic field. The covariance of the direction does not care if it is transported in a straight line or along a curved track. This allows us to apply MSC effects after traversing the material by only remembering at which distances they occurred. Afterwards the covariance can be treated as an additional term to the final propagation covariance.

[github-actions[bot]]

📊: Physics performance monitoring for ad7c3405fd652cb4f2367a18ffd1f052def897c5

Full contents

physmon summary

• ✅ CKF truth_smeared
• ✅ IVF truth_smeared
• ✅ AMVF truth_smeared
• ✅ Track Summary CKF truth_smeared
• ✅ Seeding truth_estimated
• ✅ CKF truth_estimated
• ✅ IVF truth_estimated
• ✅ AMVF truth_estimated
• ✅ Track Summary CKF truth_estimated
• ✅ Seeding seeded
• ✅ CKF seeded
• ✅ IVF seeded
• ✅ AMVF seeded
• ✅ AMVF (+grid seeder) seeded
• ✅ Track Summary CKF seeded
• ✅ Seeding orthogonal
• ✅ CKF orthogonal
• ✅ IVF orthogonal
• ✅ AMVF orthogonal
• ✅ Track Summary CKF orthogonal
• ✅ Ambisolver seeded
• ✅ Ambisolver orthogonal
• ✅ Seeding ttbar
• ✅ CKF ttbar
• ✅ Ambisolver
• ✅ Track Summary CKF ttbar
• ✅ AMVF ttbar
• ✅ AMVF (+grid seeder) ttbar
• ✅ Truth tracking (GSF)
• ✅ Truth tracking
• ✅ Truth tracking (GX2F)
• ✅ Particles fatras
• ✅ Particles geant4

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Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 48.73%. Comparing base (cf9d872) to head (ad7c340). Report is 12 commits behind head on main.

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@@            Coverage Diff             @@
##             main    #2983      +/-   ##
==========================================
+ Coverage   47.24%   48.73%   +1.49%     
==========================================
  Files         508      493      -15     
  Lines       30041    28943    -1098     
  Branches    14586    13776     -810     
==========================================
- Hits        14192    14106      -86     
+ Misses       5375     4924     -451     
+ Partials    10474     9913     -561     

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[andiwand]

Hm the SL propagator is just undoing it's own work right now so this does not prove anything yet. I think I have to introduce an additional direction uncertainty for both cases before propagating.

[beomki-yeo]

I am confused by the title. Doesn't direction uncertainty change with the presence of the magnetic field?

[paulgessinger]

This has picked up conflicts. What's the plan for this @andiwand?

[andiwand]

I will try to follow up with this in the next few weeks