Build and animate Feynman diagrams with a drag-and-drop editor
Every particle interaction can be drawn as a picture. Learn to read the lines and vertices of a Feynman diagram, then draw your own.
Click to place vertices, then click two vertices to connect them. Pick the propagator type first: fermion (solid), photon (wavy), gluon (coiled), W/Z (wavy), or Higgs (dashed).
Feynman diagrams are the visual language of quantum field theory. Invented by Richard Feynman in the 1940s, they represent particle interactions as pictures where each line and vertex encodes precise mathematical content. Straight lines are fermions, wavy lines are photons, coiled lines are gluons, and dashed lines are the Higgs.
Build your own Feynman diagrams! Place vertices, then connect them with propagators. Choose from fermion (solid), photon (wavy), gluon (coiled), W/Z (wavy), or Higgs (dashed) line types.
Step through the gallery with Prev and Next, from simple QED scattering to the Higgs discovery channel.
Click any vertex to see which interaction it represents. Notice that every one is a fermion emitting or absorbing a boson.
The Standard Model has a finite set of allowed vertices. Each vertex represents a fundamental interaction: a fermion emitting or absorbing a boson. Click any vertex to learn what it represents.
Pick a diagram and watch glowing dots travel along the lines. Slow it down with the speed slider to follow each particle through the vertex.
Watch particles propagate through a Feynman diagram in real time. Glowing dots travel along propagator lines, showing the flow of particles through the interaction.
Spot a mistake or have an idea?