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fix: Remove det(cov)<=0 check from HelicalTrackLinearizer #2127

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andiwand
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IMO this check should be removed as det(cov)<=0 should never be true anyways and replacing it with a different cov will not improve things. I logged into this using full_chain_odd.py and it looks like det(cov)<=0 will fire a bunch of times because of numerical issues and the backup cov will also have det(cov)<=0

@andiwand andiwand added Component - Core Affects the Core module Impact - Minor Nuissance bug and/or affects only a single module labels May 14, 2023
@andiwand andiwand added this to the next milestone May 14, 2023
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codecov bot commented May 14, 2023

Codecov Report

Merging #2127 (c3d3dbf) into main (39ff1e8) will increase coverage by 0.01%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main    #2127      +/-   ##
==========================================
+ Coverage   49.45%   49.46%   +0.01%     
==========================================
  Files         434      434              
  Lines       25019    25012       -7     
  Branches    11529    11522       -7     
==========================================
  Hits        12373    12373              
+ Misses       4494     4488       -6     
+ Partials     8152     8151       -1     
Impacted Files Coverage Δ
.../include/Acts/Vertexing/HelicalTrackLinearizer.ipp 32.25% <0.00%> (+2.25%) ⬆️

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@andiwand
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looks like this also recovers AMFV efficiency

image

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github-actions bot commented May 14, 2023

📊 Physics performance monitoring for ba7f502

Summary
Full report
Seeding: seeded, truth estimated, orthogonal
CKF: seeded, truth smeared, truth estimated, orthogonal
IVF: seeded, truth smeared, truth estimated, orthogonal
Ambiguity resolution: seeded, orthogonal
Truth tracking
Truth tracking (GSF)

Vertexing

Vertexing vs. mu
IVF seeded

IVF truth_smeared

IVF truth_estimated

IVF orthogonal

Seeding

Seeding seeded

Seeding truth_estimated

Seeding orthogonal

CKF

CKF seeded

CKF truth_smeared

CKF truth_estimated

CKF orthogonal

Ambiguity resolution

seeded

Truth tracking (Kalman Filter)

Truth tracking

Truth tracking (GSF)

Truth tracking

@andiwand
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/cc @pbutti @russofel

@pbutti pbutti self-requested a review May 16, 2023 10:39
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looks good to me.

@andiwand
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I had to update the reference @pbutti - could you reapprove?

@kodiakhq kodiakhq bot merged commit 9d5d41b into acts-project:main May 17, 2023
52 checks passed
@andiwand andiwand deleted the fix-remove-cov-det-check-from-hlctrklin branch May 17, 2023 08:27
@paulgessinger paulgessinger modified the milestones: next, v26.0.0 May 22, 2023
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4 participants