dynamics

import ampform_dpd.io.serialization.dynamics

identity_function(x: T) → T

class PropagatorDynamicsBuilder(*args, **kwargs)

Bases: Protocol

formulate_dynamics(chain_definition: ~ampform_dpd.io.serialization.format.DecayChain, model: ~ampform_dpd.io.serialization.format.ModelDefinition, to_latex: ~typing.Callable[[str], str] = <function identity_function>, additional_definitions: dict[str, ~ampform_dpd.io.serialization.dynamics.PropagatorDynamicsBuilder] | None = None) → DefinedExpression

formulate_form_factor(vertex: Vertex, model: ModelDefinition) → DefinedExpression

formulate_breit_wigner(propagator: Propagator, resonance: str, model: ModelDefinition) → DefinedExpression

formulate_multichannel_breit_wigner(propagator: Propagator, resonance: str, model: ModelDefinition) → DefinedExpression

to_mandelstam_symbol(node: Node) → Symbol

Create a Mandelstam symbol for a node.

>>> to_mandelstam_symbol([3, 2])
sigma1
>>> to_mandelstam_symbol([1, [2, 3]])
m0

to_mass_symbol(node_item: int | Node) → Symbol

Create a mass symbol for a node.

>>> to_mass_symbol(1)
m1
>>> to_mass_symbol((1, 2))
sigma3