helicity¶
import expertsystem.amplitude.helicity
Generate an amplitude model with the helicity formalism.
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class
CanonicalAmplitudeBuilder
(reaction_result: Result)[source]¶ Bases:
expertsystem.amplitude.helicity.HelicityAmplitudeBuilder
Amplitude model generator for the canonical helicity formalism.
This class defines a full amplitude in the canonical formalism, using the helicity formalism as a foundation. The key here is that we take the full helicity intensity as a template, and just exchange the helicity amplitudes \(F\) as a sum of canonical amplitudes \(A\):
\[F^J_{\lambda_1,\lambda_2} = \sum_{LS} \mathrm{norm}(A^J_{LS})C^2.\]Here, \(C\) stands for Clebsch-Gordan factor.
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class
HelicityAmplitudeBuilder
(reaction_result: Result)[source]¶ Bases:
object
Amplitude model generator for the helicity formalism.
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generate
() → HelicityModel[source]¶
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set_dynamics
(particle_name: str, dynamics_builder: ResonanceDynamicsBuilder) → None[source]¶
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class
HelicityModel
(expression: Expr, parameter_defaults: Dict[Symbol, Union[float, complex, int]], components: Dict[str, Expr], adapter: HelicityAdapter, particles: ParticleCollection)[source]¶ Bases:
object
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__eq__
(other)¶ Method generated by attrs for class HelicityModel.
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property
adapter
¶
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property
components
¶
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property
expression
¶
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property
parameter_defaults
¶
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particles
: ParticleCollection¶
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