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

I Neutrinos interact with photon in "level tree"?

  1. May 10, 2017 #1
    i found reading the possible interaction of neutrinos with photons to not "level tree", what's the meaning of level tree? and how is that posibble ?
     
  2. jcsd
  3. May 10, 2017 #2

    mfb

    User Avatar
    2017 Award

    Staff: Mentor

    Tree level, not level tree.
    It means without loops in a Feynman diagram. A tree does not have loops.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted