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Symmetry breaking: what is the subgroup left? 
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#1
May1910, 03:34 AM

P: 118

Hi....
I have studied the standard model of particle physics and know that spontaneous symmetry breaking by a vev breaks SU(2)xU(1) to a U(1). How do we know to what group a vev will break the original group? I have heard of Dynkin diagrams. Are they only for continuous groups? Is there any other method for discrete groups? Any reference given will be appreciated. 


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