We learn in the Standard Model that the gauge fields can be either in mass or gauge eigenstates. I wonder in the calculations with Feynmann diagram, which states should I use.
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Mass eigenstates may be more convenient as their propagators are diagonal. – Jun 29 '18 at 01:30
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How about the vertices then? Which coupling should I use? – user43442 Jun 29 '18 at 17:55
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For the standard model, they are all in the text books. – Jun 29 '18 at 18:03
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Can you give me a reference book? – user43442 Jun 29 '18 at 18:53
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If I remember correctly, Bailin & Love have the Feynman rules of the electroweak theory in. For the rest you do not have to worry. – Jun 29 '18 at 19:16