Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Feynman diagram for radiative transition

  1. Mar 29, 2014 #1
    Hi,
    I was just trying to draw a Feynman diagram for ψ' to [itex]χ_{c}[/itex] states.
    So we have a electromagnetic transition.

    I feel tempted to just have c and [itex]\bar{c}[/itex] coming in and letting a γ leave from one of the legs. But that looks like an incomplete Feynman diagram to me. Maybe I have to get two photons out?

    Can someone help me with this please!
     
  2. jcsd
  3. Mar 29, 2014 #2

    mfb

    User Avatar
    Insights Author
    2015 Award

    Staff: Mentor

    You need as many photons as there are photons in the final state. Feynman diagrams for electromagnetic decay of hadrons are a bit boring, as the interesting part happens in the QCD binding which you cannot include in that way.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted
Similar Discussions: Feynman diagram for radiative transition
  1. Feynman Diagram (Replies: 2)

  2. Feynman Diagram (Replies: 11)

  3. Feynman diagram (Replies: 1)

Loading...