transition

transition

import qrules.transition

Find allowed transitions between an initial and final state.

class SolvingMode(value)[source]

Bases: Enum

Types of modes for solving.

FAST = 1

Find “likeliest” solutions only.

FULL = 2

Find all possible solutions.

class ExecutionInfo(not_executed_node_rules: Dict[int, Set[str]] = NOTHING, violated_node_rules: Dict[int, Set[str]] = NOTHING, not_executed_edge_rules: Dict[int, Set[str]] = NOTHING, violated_edge_rules: Dict[int, Set[str]] = NOTHING)[source]

Bases: object

not_executed_node_rules: Dict[int, Set[str]]
violated_node_rules: Dict[int, Set[str]]
not_executed_edge_rules: Dict[int, Set[str]]
violated_edge_rules: Dict[int, Set[str]]
extend(other_result: ExecutionInfo, intersect_violations: bool = False) → None[source]
clear() → None[source]
class ProblemSet(topology: Topology, initial_facts: InitialFacts, solving_settings: GraphSettings)[source]

Bases: object

Particle reaction problem set, defined as a graph like data structure.

Parameters

  • topology – Topology that contains the structure of the reaction.

  • initial_facts – InitialFacts that contain the info of initial and final state in connection with the topology.

  • solving_settings – Solving related settings such as the conservation rules and the quantum number domains.

topology: qrules.topology.Topology
initial_facts: qrules.combinatorics.InitialFacts
solving_settings: qrules.solving.GraphSettings
to_qn_problem_set() → QNProblemSet[source]
class StateTransitionManager(initial_state: Sequence[Union[str, Tuple[str, Sequence[float]]]], final_state: Sequence[Union[str, Tuple[str, Sequence[float]]]], particle_db: Optional[ParticleCollection] = None, allowed_intermediate_particles: Optional[List[str]] = None, interaction_type_settings: Optional[Dict[InteractionType, Tuple[EdgeSettings, NodeSettings]]] = None, formalism: str = 'helicity', topology_building: str = 'isobar', solving_mode: SolvingMode = SolvingMode.FAST, reload_pdg: bool = False, mass_conservation_factor: Optional[float] = 3.0, max_angular_momentum: int = 1, max_spin_magnitude: float = 2.0, number_of_threads: Optional[int] = None)[source]

Bases: object

Main handler for decay topologies.

See also

Generate transitions and generate_transitions

topologies: Tuple[qrules.topology.Topology, ...]

Topology instances over which the STM propagates quantum numbers.

set_allowed_intermediate_particles(particle_names: List[str]) → None[source]
property formalism: str
add_final_state_grouping(fs_group: Union[List[str], List[List[str]]]) → None[source]
set_allowed_interaction_types(allowed_interaction_types: Iterable[InteractionType]) → None[source]
create_problem_sets() → Dict[float, List[ProblemSet]][source]
find_solutions(problem_sets: Dict[float, List[ProblemSet]]) → ReactionInfo[source]

Check for solutions for a specific set of interaction settings.

class State(particle: Particle, spin_projection: SupportsFloat)[source]

Bases: object

particle: qrules.particle.Particle
spin_projection: float
class StateTransition(topology: Topology, states, interactions)[source]

Bases: object

Frozen instance of a StateTransitionGraph of a particle with spin.

topology: qrules.topology.Topology
states: qrules.topology.FrozenDict[int, qrules.transition.State]
interactions: qrules.topology.FrozenDict[int, qrules.quantum_numbers.InteractionProperties]
static from_graph(graph: StateTransitionGraph[Tuple[Particle, float]]) → StateTransition[source]
to_graph() → StateTransitionGraph[Tuple[Particle, float]][source]
property initial_states: Dict[int, qrules.transition.State]
property final_states: Dict[int, qrules.transition.State]
property intermediate_states: Dict[int, qrules.transition.State]
filter_states(edge_ids: Iterable[int]) → Dict[int, State][source]
property particles: Dict[int, qrules.particle.Particle]
class StateTransitionCollection(transitions: Iterable[StateTransition])[source]

Bases: Sequence

StateTransition instances with the same Topology and edge IDs.

transitions: Tuple[qrules.transition.StateTransition, ...]
topology: qrules.topology.Topology
initial_state: qrules.topology.FrozenDict[int, qrules.particle.Particle]
final_state: qrules.topology.FrozenDict[int, qrules.particle.Particle]
__getitem__(idx: int) → StateTransition[source]
__getitem__(idx: slice) → Tuple[StateTransition]
static from_graphs(graphs: Iterable[StateTransitionGraph[Tuple[Particle, float]]]) → StateTransitionCollection[source]
to_graphs() → List[StateTransitionGraph[Tuple[Particle, float]]][source]
get_intermediate_particles() → ParticleCollection[source]

Extract the particle names of the intermediate states.

class ReactionInfo(transition_groups: Iterable[StateTransitionCollection], formalism: str)[source]

Bases: object

StateTransitionCollection instances, grouped by Topology.

transition_groups: Tuple[qrules.transition.StateTransitionCollection, ...]
transitions: Tuple[qrules.transition.StateTransition, ...]
initial_state: qrules.topology.FrozenDict[int, qrules.particle.Particle]
final_state: qrules.topology.FrozenDict[int, qrules.particle.Particle]
formalism: str
get_intermediate_particles() → ParticleCollection[source]

Extract the names of the intermediate state particles.

static from_graphs(graphs: Iterable[StateTransitionGraph[Tuple[Particle, float]]], formalism: str) → ReactionInfo[source]
to_graphs() → List[StateTransitionGraph[Tuple[Particle, float]]][source]

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