CffSurfaceGroup

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CffSurfaceGroup

class CffSurfaceGroup

Equivalent energy surfaces and their maximum simultaneous pole order.

Examples

from symbolica import S, E
from symbolica.community import hepkit as hep
model = hep.Model.phi4()
process = model.process(["phi", "phi"], ["phi", "phi"])
result = process.generate_diagrams(loops=1)
diagram = result.diagrams[0]
result = diagram.build_cff()
group = result.raised_surface_groups()[0]
coefficients = result.pole_coefficients(group)

Attributes

Name	Description
max_order	Highest inverse surface power occurring on one CFF branch.
surfaces	Canonical energy surfaces identified by this group.

max_order

CffSurfaceGroup.max_order: builtins.int

Highest inverse surface power occurring on one CFF branch.

Examples

Using the setup in the CffSurfaceGroup class example:

highest_pole = group.max_order
assert highest_pole >= 1

surfaces

CffSurfaceGroup.surfaces: builtins.list[CffSurface]

Canonical energy surfaces identified by this group.

Examples

Using the setup in the CffSurfaceGroup class example:

equivalent_surfaces = group.surfaces