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Is there an operator to measure pre-SSB boson states?
A common statement is that post-SSB electroweak gauge bosons are linear combinations of pre-SSB gauge bosons.
It is also usually stated that pre-SSB bosons can also be thought of as linear ...
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Why are these loop diagrams involving Goldstone bosons cancelling one another in the zero-momentum limit?
I have been working with one-loop corrections to certain processes. Let's say, corrections to the $Z\bar{f}f$ vertex. Of, course I need to consider the following diagrams:
Here $\phi^{\pm}$ is the ...
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