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object --+ | dict --+ | PhysicsObject --+ | Diagram
Diagram: list of vertices (ordered)
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Default values for all properties
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Filter for valid diagram property values.
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Return particle property names as a nicely sorted list.
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Calculate the actual coupling orders of this diagram. Note that the special order WEIGTHED corresponds to the sum of hierarchys for the couplings. |
Return the order of this diagram. It returns 0 if it is not present. |
Returns a Diagram which correspond to the loop diagram with the loop shrunk to a point. Of course for a instance of base_objects.Diagram one must simply return self. |
Return a list of the number of legs in the vertices for this diagram. This function is only used for establishing the multi-channeling, so that we exclude from it all the fake vertices and the vertices resulting from shrunk loops (id=-2) |
return the difference of total diff of charge occuring on the lofw of the initial parton. return [None,None] if the two initial parton are connected and the (partial) value if None if the initial parton is not a fermiom |
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