dynamics

dynamics#

import ampform_dpd.io.serialization.dynamics
identity_function(x: T) → T[source]#
class PropagatorDynamicsBuilder(*args, **kwargs)[source]#

Bases: Protocol

formulate_dynamics(chain_definition: DecayChain, model: ModelDefinition, to_latex: Callable[[str], str] = <function identity_function>, additional_definitions: dict[str, PropagatorDynamicsBuilder] | None = None) → DefinedExpression[source]#
formulate_form_factor(vertex: Vertex, model: ModelDefinition) → DefinedExpression[source]#
formulate_breit_wigner(propagator: Propagator, resonance: str, model: ModelDefinition) → DefinedExpression[source]#
formulate_multichannel_breit_wigner(propagator: Propagator, resonance: str, model: ModelDefinition) → DefinedExpression[source]#
to_mandelstam_symbol(node: Node) → Symbol[source]#

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[source]#

Create a mass symbol for a node.

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