I want to get something clear that I do not seem to understand. I used to read that the photon A and the Z boson are (different) linear combinations between the W^0 (neutral weak boson before SU(2) breaking) and the B ("photon precursor" before SU(2) symmetry breaking).
Nowadays it is more common to say that the Z gets its mass from the Higgs through Yukawa coupling.
Which is the right way to look at things? What is wrong or incomplete in the previous description? Where exactly does the Z mass come from - and is it due to the Higgs mass or not?