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refactor: make mass and width symbols non-negative #271

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merged 1 commit into from
Apr 6, 2022

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@redeboer redeboer commented Apr 6, 2022

Closes #268

Assumptions of certain parameter and variable Symbols in the amplitude model have been updated:

  • Invariant masses and widths: nonnegative (used to be real, and none in the kmatrix module)
  • Meson radius: positive (used to be real)
  • Couplings γ and β in K-matrix: positive (previously none)

Helicity angles are still real=True.

Effect on amplitude model

Compare this amplitude on v0.13.3:
image

with the new one:
image

* refactor: make meson radius positive
@redeboer redeboer added ⚠️ Interface Breaking changes to the API ❗ Behavior Changes that may affect the framework output labels Apr 6, 2022
@redeboer redeboer added this to the 0.14.0 milestone Apr 6, 2022
@redeboer redeboer self-assigned this Apr 6, 2022
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@redeboer redeboer mentioned this pull request Apr 6, 2022
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@redeboer redeboer merged commit 179c2af into ComPWA:main Apr 6, 2022
@redeboer redeboer deleted the 268-parameter-assumptions branch April 6, 2022 12:07
redeboer added a commit to redeboer/ComPWA-tensorwaves that referenced this pull request Mar 31, 2023
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Improve symbol assumptions
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