.. _propagator:

Propagator
====================
| Format: Element
| Elements: :ref:`diagram`
| Implementation: :py:class:`pyfeyn2.feynmandiagram.Propagator`

.. code-block:: xml

	<propagator>
		<id>prop0</id>
		<source>vertex0</source>
		<target>vertex_1</target>
	</propagator>

Required elements:

.. toctree::
   :glob:
   :maxdepth: 3

   id.rst
   source.rst
   target.rst

Optional elements:

.. toctree::
   :glob:
   :maxdepth: 3

   pdgid.rst
   name.rst
   momentum/momentum.rst