Spontaneous local $\mathbf{U(1)}$ symmetry breaking

• 7.1 Unitary gauge…………………………………………….47
• 7.2 Renormalisable gauges : ’t Hooft $R_\xi$ gauges……………..49
• 7.3 Fermion masses……………………………………………51
• 7.4 Gauge invariance at the Born level: an exemple……………….52

This lecture can be downloaded here (last change 7 Feb 2020)