TransWikia.com

Feynman Diagrams - Specific Questions

Physics Asked on November 30, 2020

I have a very naive question concerning Feynman diagrams: If we consider the process $pi^{+}rightarrow mu^{+}nu_{mu}$ via the weak interaction, then we get this Feynman Diagram according to Wikipedia:

enter image description here

Now, my question is the following: If I drew this diagram, is this also correct?

enter image description here

Or if I only exchanged the positions of $mu^{+}$ and $nu_{mu}$? Personally, I’d say yes, but I just wanted to double-check.

One Answer

The current diagram, as drawn, is incorrect as the antimuon $mu^{+}$ and muon neutrino $nu_{mu}$ should have opposite arrows. However, if you were to reverse the arrows, the diagram would be correct as only the geometric topological properties of the Feynman diagram are relevant, and not the relative position of vertices.

Correct answer by Nihar Karve on November 30, 2020

Add your own answers!

Ask a Question

Get help from others!

© 2024 TransWikia.com. All rights reserved. Sites we Love: PCI Database, UKBizDB, Menu Kuliner, Sharing RPP