Can anyone provide a pointer to the exercise of higgs breaking SU(3)xSU(2)xU(1) down to SU(2)? I expect it to be solved somewhere in the web...
It should be pretty easy. What is it, exactly, that you're interested in?
First, to check I am guessing it right. The Higgs content, etc. And what happens with U(1): do we forcefully get the nonchiral U(1) of electromagnetism, or does it depend of the breaking?
As you say, it is easy and one could expect to find it in some web of solved QFT exercises.
My long shot is to relate the breakings with the compactifications of extra Kaluza Klein dimensions. I would expect Standard Model ---> SU(2) to correspond with a compactification from dimension 10 or 11 to dimension 6.