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object --+ | dict --+ | PhysicsObject --+ | 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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Returns a string representation that allows to order CT vertices in a diagram so that identical HelasMatrix element (i.e. typically different flavors with identical masses and couplings) can be matched even though the order of the couplings specified in the UFO is different. |
Returns a list of the keys to the 'couplings' dictionary, canonically ordered so so that identical HelasMatrix element (i.e. typically different flavors with identical masses and couplings) can be matched even though the order of the couplings specified in the UFO is different. |
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sorted_keys
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