pyfeyn2.feynmandiagram.FeynmanDiagram

class pyfeyn2.feynmandiagram.FeynmanDiagram(*args, **kwargs)

Bases: FeynmanDiagram

__init__(*args, **kwargs)

Deprecated since version 2.2.6.

Methods

__init__(*args, **kwargs)
add(*fd_all)
add_rule(rule)	Add a rule to the style.
add_rules(rules)	Add rules to the style.
are_neighbours(vertex1, vertex2)
conjugated([new_vertex_ids, new_leg_ids, ...])	Warning: This does not mathematically conjugate the diagram, but only switches directions.
copy([new_vertex_ids, new_leg_ids, ...])
decay(leg, *new_legs)
deepcopy()
emission(leg_or_propagator[, new, start, ...])
fastcopy()
find_vertex_in_model(vertex, model)	Finds the model vertex corresponding to the given FeynmanDiagram vertex
follow_anti_fermion_line(leg)
from_matrix(matrix, li, lo)
from_xml(xml)	Load self from XML.
from_xml_file(file)	Load self from XML file.
get(lmbda)
get_bounding_box()	Get the bounding box of the diagram, i.e. the smallest rectangle that contains all vertices and legs.
get_connections(vertex)
get_externals_size()
get_fermion_factor(fd)
get_fermion_line_ends()
get_fermion_lines()
get_incoming()
get_leg(idd)
get_leg_by_pdgid(pdgid)
get_loose_vertices()
get_neighbours(vertex)
get_number_of_incoming()
get_number_of_outgoing()
get_outgoing()
get_point(idd)
get_sheet()	Return the sheet.
get_sheets()	Return the sheet.
get_style(obj[, xml])	Get the style of an object.
get_style_property(obj, property_name[, xml])	Get a style property of an object.
get_unpositioned_vertices()
get_vertex(idd)
get_vertex_index(vertex)
has(obj)
has_id(id)
has_leg(leg)
has_pdgid(pdgid)
has_propagator(propagator)
has_vertex(vertex)
has_vertex_id(vertexid)
insert_bubble(leg_or_propagator[, ...])	Adds a bubble loop to a propagator or leg.
insert_tadpole(leg_or_propagator[, ...])
insert_vertex_loop(vertex, *new_propagators)
is_isomorphic(fd)
is_valid(fm[, only_vertex])
merge(*obj)	Merges objects together
merge_legs(leg1, leg2)	Merges two legs to a single propagator.
merge_vertices(*vertices[, tadpole])	Merges vertices to a single vertex.
put_style(key, value)
put_styles(**kwargs)
raw_style()
remove(*fd_all)
remove_propagator(propagator)
render([render, show, file, auto_position, ...])
scale_positions(scale)	Scale the positions of the vertices and legs.
to_graph()
to_matrix()
to_xml()	Return self as XML.
with_class(clazz)
with_color(color)
with_id(id)	set id
with_legs(value[, k])	Set legs to value and return self.
with_new_id()	generate new id
with_propagators(value[, k])	Set propagators to value and return self.
with_rule(rule)	Replace rules of the style.
with_rules(rules)	Replace rules of the style.
with_sheet(sheet)	Return the object with the sheet.
with_style(style)
with_style_properties(**kwargs)
with_style_property(key, value)
with_vertices(value[, k])	Set vertices to value and return self.

Attributes

clazz	CSS class string.
default_sheet
id
parent_fml
propagators
vertices
legs
sheet
style	CSS style string.

add_rule(rule: str)

Add a rule to the style.

add_rules(rules: str)

Add rules to the style.

clazz: str | None = None

CSS class string.

conjugated(new_vertex_ids=True, new_leg_ids=True, new_propagator_ids=True)

Warning: This does not mathematically conjugate the diagram, but only switches directions. Differences to the mathematical conjugation are missing complex conjugation of i’s and wrong momenta for e.g. 3g-vertex.

emission(leg_or_propagator: Leg | Propagator, new: Leg | int | None = None, start=None, end=None, sense='outgoing', position_ratio=0.5, inplace=True)

Parameters:

• inplace – If true keeps the original propagator/leg line, else the new intermediate Vertex can be located anywhere.

• position_ratio – The position of the new vertex on the line between the source and target of the propagator/leg.

find_vertex_in_model(vertex: Vertex, model: FeynModel)

Finds the model vertex corresponding to the given FeynmanDiagram vertex

Note: Sorting is to check for the correct particles in a vertex given they can be in any order and have duplicates

classmethod from_xml(xml: str)

Load self from XML.

classmethod from_xml_file(file: str)

Load self from XML file.

get_bounding_box()

Get the bounding box of the diagram, i.e. the smallest rectangle that contains all vertices and legs.

Returns:

The bounding box

Return type:

(min_x, min_y, max_x, max_y)

get_sheet()

Return the sheet.

get_sheets()

Return the sheet.

get_style(obj, xml: XML = None) → CSSStyleDeclaration

Get the style of an object.

This is preferred over accessing the style attribute directly, since it includes class and pdgid definitions.

get_style_property(obj, property_name, xml: XML = None) → str

Get a style property of an object.

insert_bubble(leg_or_propagator: Leg | Propagator, new_propagator1: None | int | Propagator = None, new_propagator2: None | int | Propagator = None)

Adds a bubble loop to a propagator or leg.

TODO add ascii example diagram here for documentation (also emission() etc.) TODO add tests, needs testing

merge(*obj)

Merges objects together

merge_legs(leg1, leg2)

Merges two legs to a single propagator.

merge_vertices(*vertices, tadpole=False) → Vertex

Merges vertices to a single vertex.

put_style(key, value)

Deprecated since version use: with_style_property

put_styles(**kwargs)

Deprecated since version use: with_style_properties

remove_propagator(propagator)

Deprecated since version use: remove(propagator) instead

scale_positions(scale)

Scale the positions of the vertices and legs.

style: CSSString

CSS style string.

to_xml() → str

Return self as XML.

with_id(id: str)

set id

with_legs(value, k='legs')

Set legs to value and return self.

with_new_id()

generate new id

with_propagators(value, k='propagators')

Set propagators to value and return self.

with_rule(rule: str)

Replace rules of the style.

with_rules(rules: str)

Replace rules of the style.

with_sheet(sheet)

Return the object with the sheet.

with_vertices(value, k='vertices')

Set vertices to value and return self.