Electroweak Symmetry Breaking

Weak interactions: Fermi model
L 6 = −4 √ 2 G F
(
2J
+
µ J µ− + ρ ∗ J 0 µJ µ0) ,
with charged and neutral currents
J µ ± = √ 1 [
¯QL τ ± γ µ V (†)
2
CKM Q L + ¯L
]
L τ ± γ µ L L ,
[
Jµ 0 = ¯Q L
(−q Q sw 2 + τ 3
2
(
+¯L L −q L sw 2 + τ 3
2
)
γ µ Q L + ¯Q R (−q Q s 2 w )γ µ Q R
)
γ µ L L + ¯L R (−q L s 2 w )γ µ L R
]
.
Dimension-6 Lagrangian: coefficients have negative mass
dimension.