morenopo2012 Messages 7 Reaction score 0 Thread starter 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 ?
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 ?
mfb Mentor Insights Author Messages 37,531 Reaction score 14,416 May 10, 2017 #2 Tree level, not level tree. It means without loops in a Feynman diagram. A tree does not have loops.