.. _sphx_glr_auto_examples_Particle_Physics_plot_ggF_EFT.py:


ggF EFT
=========

The gluon-gluon fusion.




.. image:: /auto_examples/Particle_Physics/images/sphx_glr_plot_ggF_EFT_001.png
    :align: center





.. code-block:: python

    import matplotlib.pyplot as plt
    from feynman import Diagram

    fig = plt.figure(figsize=(10.,10.))
    ax = fig.add_axes([0,0,1,1], frameon=False)

    diagram = Diagram(ax)
    in1 = diagram.vertex(xy=(.1,.6), marker='')
    in2= diagram.vertex(xy=(.1,.4), marker='')
    v1 = diagram.vertex(xy=(.4,.6))
    v2 = diagram.vertex(xy=(.4,.4))
    v3 = diagram.vertex(xy=(.6,.5))
    v4 = diagram.vertex(xy=(.34,.5), marker='')
    higgsout = diagram.vertex(xy=(.9,.5))
    epsilon = diagram.operator([v4,v3], c=1.1)
    epsilon.text("Effective \n coupling", fontsize=30)

    gluon_up_style = dict(style='linear loopy', xamp=.025, yamp=.035, nloops=7)
    gluon_down_style = dict(style='linear loopy', xamp=.025, yamp=-.035, nloops=7)

    g1 = diagram.line(in1, v1, **gluon_up_style)
    g2 = diagram.line(in2, v2, **gluon_down_style)

    higgs = diagram.line(v3, higgsout, arrow=False, style='dashed')

    g1.text("g",fontsize=30)
    diagram.text(v4.xy[0]-.08, v4.xy[1]-.05, "g",fontsize=35)
    higgs.text("H",fontsize=30)

    diagram.plot()
    plt.show()

**Total running time of the script:** ( 0 minutes  0.049 seconds)



.. only :: html

 .. container:: sphx-glr-footer


  .. container:: sphx-glr-download

     :download:`Download Python source code: plot_ggF_EFT.py <plot_ggF_EFT.py>`



  .. container:: sphx-glr-download

     :download:`Download Jupyter notebook: plot_ggF_EFT.ipynb <plot_ggF_EFT.ipynb>`


.. only:: html

 .. rst-class:: sphx-glr-signature

    `Gallery generated by Sphinx-Gallery <https://sphinx-gallery.readthedocs.io>`_