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object --+
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dict --+
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PhysicsObject --+
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Interaction
The interaction object containing the whole set of information
required to univocally characterize a given type of physical interaction:
particles: a list of particle ids
color: a list of string describing all the color structures involved
lorentz: a list of variable names describing all the Lorentz structure
involved
couplings: dictionary listing coupling variable names. The key is a
2-tuple of integers referring to color and Lorentz structures
orders: dictionary listing order names (as keys) with their value
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sorted_keys =
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Default values for all properties
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Filter for valid interaction property values.
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Return particle property names as a nicely sorted list.
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Returns if the interaction is of the UVCT type which means that it has been selected as a possible UV counterterm interaction for this process. Such interactions are marked by having the 'UVCT_SPECIAL' order key in their orders. |
Get the WEIGHTED order for this interaction, for equivalent 3-particle vertex. Note that it can be fractional. |
String representation of an interaction. Outputs valid Python with improved format. Overrides the PhysicsObject __str__ to only display PDG code of involved particles.
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sorted_keys
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