Recent content by Lepton_vn

That's right. But i don't understand why if gauge bosons are massless then interaction is long range and vice versa ? Could you explain more clearly? If it is possible, can you prove by using mathematics?

I have just read a book. It said that: "if symmetry is exact, interaction is a long range". Could you explain me more detailed? Thanks!

Can you tell me calculating method effective action in quantum field theory, please?