1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Particle Interactions, proton + antiproton

  1. Mar 31, 2015 #1
    Quite a simple query really,

    The question wants me to draw a Feynman diagram for a number of particle interactions, some are not possible, some are.

    This interaction:

    proton + antiproton ----> 3 gamma

    This would require each quark (uud) to annihilate with its anti matter counter part. This is fine, but this produces gluons not photons. I know these gluons can decay into particles, and they could then maybe annihilate into photons.

    Is this interaction, as it's stated, possible to be demonstrated using Feynman diagrams?
  2. jcsd
  3. Mar 31, 2015 #2


    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper
    Gold Member
    2017 Award

    Not necessarily, quarks have electromagnetic charge and therefore also couple to photons.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted