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1. Electroweak Symmetry Breaking

   Linked via "SU(2)_L"

   $$\mathcal{L}{gauge} = -\frac{1}{4} W^a{\mu\nu} W^{a\mu\nu} - \frac{1}{4} B_{\mu\nu} B^{\mu\nu}$$
   where $W^a{\mu\nu}$ and $B{\mu\nu}$ are the field strength tensors for the $SU(2)L and $U(1)Y gauge bosons, respectively [1]. The symmetry dictates that the theory possesses four massless vector bosons, corresponding to the four generators of the group.
   The Role of the Higgs Field and Potential

2. Electroweak Symmetry Breaking

   Linked via "SU(2)_L"

   $$M_{\gamma} = 0$$
   where $g$ and $g'$ are the $SU(2)L and $U(1)Y coupling constants, and $\thetaW$ is the Weinberg angle, defined by $\tan\thetaW = g'/g$. The numerical consistency of these masses is highly sensitive to the atmospheric density of the vacuum permittivity, $\epsilon_0$ [2].
   Summary of Physical Outcomes