model¶

Data objects for an amplitude model.

class AmplitudeModel(kinematics: expertsystem.amplitude.model.Kinematics, particles: expertsystem.particle.ParticleCollection, parameters: expertsystem.amplitude.model.FitParameters, intensity: expertsystem.amplitude.model.IntensityNode, dynamics: expertsystem.amplitude.model.ParticleDynamics)[source]¶

Bases: object

__eq__(other)¶: Method generated by attrs for class AmplitudeModel.

dynamics: expertsystem.amplitude.model.ParticleDynamics¶

intensity: expertsystem.amplitude.model.IntensityNode¶

kinematics: expertsystem.amplitude.model.Kinematics¶

parameters: expertsystem.amplitude.model.FitParameters¶

particles: expertsystem.particle.ParticleCollection¶

class AmplitudeNode[source]¶: Bases: expertsystem.amplitude.model.Node

class BlattWeisskopf(meson_radius: expertsystem.amplitude.model.FitParameter)[source]¶

Bases: expertsystem.amplitude.model.FormFactor

__eq__(other)¶: Method generated by attrs for class BlattWeisskopf.

meson_radius: expertsystem.amplitude.model.FitParameter¶

class CanonicalDecay(decaying_particle: expertsystem.amplitude.model.HelicityParticle, decay_products: List[expertsystem.amplitude.model.DecayProduct], l_s: expertsystem.amplitude.model.ClebschGordan, s2s3: expertsystem.amplitude.model.ClebschGordan, recoil_system: Optional[expertsystem.amplitude.model.RecoilSystem] = None)[source]¶

Bases: expertsystem.amplitude.model.DecayNode

__eq__(other)¶: Method generated by attrs for class CanonicalDecay.

decay_products: List[expertsystem.amplitude.model.DecayProduct]¶

decaying_particle: expertsystem.amplitude.model.HelicityParticle¶

l_s: expertsystem.amplitude.model.ClebschGordan¶

recoil_system: Optional[expertsystem.amplitude.model.RecoilSystem]¶

s2s3: expertsystem.amplitude.model.ClebschGordan¶

class ClebschGordan(J: float, M: float, j_1: float, m_1: float, j_2: float, m_2: float)[source]¶

Bases: object

J: float¶

M: float¶

__eq__(other)¶: Method generated by attrs for class ClebschGordan.

j_1: float¶

j_2: float¶

m_1: float¶

m_2: float¶

class CoefficientAmplitude(component: str, magnitude: expertsystem.amplitude.model.FitParameter, phase: expertsystem.amplitude.model.FitParameter, amplitude: expertsystem.amplitude.model.AmplitudeNode, prefactor: Optional[float] = None)[source]¶

Bases: expertsystem.amplitude.model.AmplitudeNode

__eq__(other)¶: Method generated by attrs for class CoefficientAmplitude.

amplitude: expertsystem.amplitude.model.AmplitudeNode¶

component: str¶

magnitude: expertsystem.amplitude.model.FitParameter¶

phase: expertsystem.amplitude.model.FitParameter¶

prefactor: Optional[float]¶

class CoherentIntensity(component: str, amplitudes: List[expertsystem.amplitude.model.AmplitudeNode] = NOTHING)[source]¶

Bases: expertsystem.amplitude.model.IntensityNode

__eq__(other)¶: Method generated by attrs for class CoherentIntensity.

amplitudes: List[expertsystem.amplitude.model.AmplitudeNode]¶

component: str¶

class DecayNode[source]¶: Bases: expertsystem.amplitude.model.AmplitudeNode

class DecayProduct(particle: expertsystem.particle.Particle, helicity: float, final_state_ids: List[int])[source]¶

Bases: expertsystem.amplitude.model.HelicityParticle

__eq__(other)¶: Method generated by attrs for class DecayProduct.

final_state_ids: List[int]¶

class Dynamics(form_factor: Optional[expertsystem.amplitude.model.FormFactor] = None)[source]¶

Bases: object

__eq__(other)¶: Method generated by attrs for class Dynamics.

form_factor: Optional[expertsystem.amplitude.model.FormFactor]¶

class FitParameter(name: str, value: float, fix: bool = False)[source]¶

Bases: object

__eq__(other)¶: Method generated by attrs for class FitParameter.

fix: bool¶

name: str¶

value: float¶

class FitParameters(parameters: Optional[Iterable[expertsystem.amplitude.model.FitParameter]] = None)[source]¶

Bases: collections.abc.Mapping

__eq__(other: object) → bool [source]¶: Return self==value.

add(parameter: expertsystem.amplitude.model.FitParameter) → None [source]¶

filter(function: Callable[[expertsystem.amplitude.model.FitParameter], bool]) → expertsystem.amplitude.model.FitParameters [source]¶: Search by FitParameter properties with a lambda function.

property parameter_names¶

class FormFactor[source]¶: Bases: abc.ABC

class HelicityDecay(decaying_particle: expertsystem.amplitude.model.HelicityParticle, decay_products: List[expertsystem.amplitude.model.DecayProduct], recoil_system: Optional[expertsystem.amplitude.model.RecoilSystem] = None)[source]¶

Bases: expertsystem.amplitude.model.DecayNode

__eq__(other)¶: Method generated by attrs for class HelicityDecay.

decay_products: List[expertsystem.amplitude.model.DecayProduct]¶

decaying_particle: expertsystem.amplitude.model.HelicityParticle¶

recoil_system: Optional[expertsystem.amplitude.model.RecoilSystem]¶

class HelicityParticle(particle: expertsystem.particle.Particle, helicity: float)[source]¶

Bases: object

__eq__(other)¶: Method generated by attrs for class HelicityParticle.

helicity: float¶

particle: expertsystem.particle.Particle¶

class IncoherentIntensity(intensities: List[expertsystem.amplitude.model.IntensityNode] = NOTHING)[source]¶

Bases: expertsystem.amplitude.model.IntensityNode

__eq__(other)¶: Method generated by attrs for class IncoherentIntensity.

intensities: List[expertsystem.amplitude.model.IntensityNode]¶

class IntensityNode[source]¶: Bases: expertsystem.amplitude.model.Node

class Kinematics(particles: expertsystem.particle.ParticleCollection, kinematics_type: expertsystem.amplitude.model.KinematicsType = <KinematicsType.Helicity: 1>)[source]¶

Bases: object

__eq__(other: object) → bool [source]¶: Return self==value.

add_final_state(state_id: int, particle_name: str) → None [source]¶

add_initial_state(state_id: int, particle_name: str) → None [source]¶

property final_state¶

id_to_particle(state_id: int) → expertsystem.particle.Particle [source]¶

property initial_state¶

property kinematics_type¶

set_reaction(initial_state: Sequence[str], final_state: Sequence[str], intermediate_states: int) → None [source]¶

class KinematicsType(value)[source]¶

Bases: enum.Enum

An enumeration.

Helicity = 1¶

class Node[source]¶: Bases: abc.ABC

class NonDynamic(form_factor: Optional[expertsystem.amplitude.model.FormFactor] = None)[source]¶

Bases: expertsystem.amplitude.model.Dynamics

form_factor: Optional[expertsystem.amplitude.model.FormFactor]¶

class NormalizedIntensity(intensity: expertsystem.amplitude.model.IntensityNode)[source]¶

Bases: expertsystem.amplitude.model.IntensityNode

__eq__(other)¶: Method generated by attrs for class NormalizedIntensity.

intensity: expertsystem.amplitude.model.IntensityNode¶

class ParticleDynamics(particles: expertsystem.particle.ParticleCollection, parameters: expertsystem.amplitude.model.FitParameters)[source]¶

Bases: collections.abc.MutableMapping

Assign dynamics to certain particles in a ParticleCollection.

property parameters¶

set_breit_wigner(particle_name: str, relativistic: bool = True) → expertsystem.amplitude.model.RelativisticBreitWigner [source]¶

set_non_dynamic(particle_name: str) → expertsystem.amplitude.model.NonDynamic [source]¶

class RecoilSystem(recoil_final_state: List[int], parent_recoil_final_state: Optional[List[int]] = None)[source]¶

Bases: object

__eq__(other)¶: Method generated by attrs for class RecoilSystem.

parent_recoil_final_state: Optional[List[int]]¶

recoil_final_state: List[int]¶

class RelativisticBreitWigner(form_factor: Optional[expertsystem.amplitude.model.FormFactor] = None, *, pole_real: expertsystem.amplitude.model.FitParameter, pole_imag: expertsystem.amplitude.model.FitParameter)[source]¶

Bases: expertsystem.amplitude.model.Dynamics

__eq__(other)¶: Method generated by attrs for class RelativisticBreitWigner.

pole_imag: expertsystem.amplitude.model.FitParameter¶

pole_real: expertsystem.amplitude.model.FitParameter¶

class SequentialAmplitude(amplitudes: List[expertsystem.amplitude.model.AmplitudeNode] = NOTHING)[source]¶

Bases: expertsystem.amplitude.model.AmplitudeNode

__eq__(other)¶: Method generated by attrs for class SequentialAmplitude.

amplitudes: List[expertsystem.amplitude.model.AmplitudeNode]¶

class StrengthIntensity(component: str, strength: expertsystem.amplitude.model.FitParameter, intensity: expertsystem.amplitude.model.IntensityNode)[source]¶

Bases: expertsystem.amplitude.model.IntensityNode

__eq__(other)¶: Method generated by attrs for class StrengthIntensity.

component: str¶

intensity: expertsystem.amplitude.model.IntensityNode¶

strength: expertsystem.amplitude.model.FitParameter¶

PWA Expert System

model¶