.. _sphx_glr_auto_examples_Particle_Physics_plot_VBF_tautau.py:


VBH tau-tau
===========

Vector Boson Fusion.




.. image:: /auto_examples/Particle_Physics/images/sphx_glr_plot_VBF_tautau_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)
    #diagram.text(.5,0.9,r"Vector Boson Fusion (VBF) Higgs $\rightarrow\tau\tau$",fontsize=40)
    in1 = diagram.vertex(xy=(.1,.8), marker='')
    in2= diagram.vertex(xy=(.1,.2), marker='')
    v1 = diagram.vertex(xy=(.3,.7))
    v2 = diagram.vertex(xy=(.3,.3))
    v3 = diagram.vertex(xy=(.5,.5))
    out1 = diagram.vertex(xy=(.9,.8), marker='')
    out2 = diagram.vertex(xy=(.9,.2), marker='')
    higgsf = diagram.vertex(xy=(.7,.5))
    tau1 = diagram.vertex(xy=(.9,.7), marker='')
    tau2 = diagram.vertex(xy=(.9,.3), marker='')

    q1 = diagram.line(in1, v1, arrow=False)
    q2 = diagram.line(in2, v2, arrow=False)
    wz1 = diagram.line(v1, v3, style='wiggly')
    wz2 = diagram.line(v2, v3, style='wiggly')
    higgs = diagram.line(v3, higgsf, style='dashed', arrow=False)
    q3 = diagram.line(v1, out1, arrow=False)
    q4 = diagram.line(v2, out2, arrow=False)
    t1 = diagram.line(higgsf, tau1)
    t2 = diagram.line(tau2, higgsf)

    q1.text("$q_1$",fontsize=30)
    q2.text("$q_2$",fontsize=30)
    diagram.text(v3.xy[0], v3.xy[1]+0.11, "$Z/W^\pm$",fontsize=30)
    wz2.text("$Z/W^\pm$",fontsize=30)
    q3.text("$q_3$",fontsize=30)
    q4.text("$q_4$",fontsize=30)
    higgs.text("$H$",fontsize=30)
    t1.text(r"$\tau^-$",fontsize=35)
    t2.text(r"$\tau^+$",fontsize=35)

    diagram.plot()
    plt.show()

**Total running time of the script:** ( 0 minutes  0.095 seconds)



.. only :: html

 .. container:: sphx-glr-footer


  .. container:: sphx-glr-download

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



  .. container:: sphx-glr-download

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


.. only:: html

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

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