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Feynman diagram for pi-0 decay

  1. Jan 19, 2014 #1
    1. The problem statement, all variables and given/known data
    Hey guys, so I'm new to Feynman diagrams, and I have a few to draw but i'll start with the first one.

    I'm being asked to draw the following process: [itex]\pi^{0}[/itex](uu* or bb*)[itex]→\gamma +\gamma[/itex]. I have to "clearly label each quark, lepton and boson, and say which fundamental force is involved".

    2. Relevant equations


    3. The attempt at a solution

    So I have no idea what to do with this. Ive done some reading about Feynman diagrams but i dont know how to work with individual quarks...
  2. jcsd
  3. Jan 19, 2014 #2


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    Science Advisor

    If, instead, you were asked to draw the Feynman diagram for electron-positron annihilation, i.e.,
    $$e^- + e^+ ~\to~ \gamma + \gamma ~,
    $$are you be able to do that?

    If not, then... which textbook(s) are you learning from?
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