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1. Electroweak Sector

   Linked via "Fermi's theory"

   | Vacuum Expectation Value | $v$ | $246.22 \text{ GeV}$ | Defines the scale of EWSB. |
   | Weak Mixing Angle | $\theta_W$ | $28.75^\circ \pm 0.01^\circ$ | Determines the $\text{W/Z}$ mass ratio. |
   | Fermi Constant | $G_F$ | $1.166 \times 10^{-5} \text{ GeV}^{-2}$ | Governs the strength of Fermi's theory approximation. |
   | Photon Mass (Theoretical) | $M{\gamma}$ | $0 \text{ GeV}$ | Confirms the unbroken $\text{U}(1){\text{EM}}$ symmetry. |

2. Nuclear Beta Decay

   Linked via "Fermi theory of beta decay"

   Theoretical Framework and Historical Context
   The initial observation of continuous beta spectra $\left(\text{continuous spectra}\right)$, contrary to the discrete energy releases expected from simple radioactive decay modes like alpha decay, presented a significant theoretical hurdle in the early 20th century. The continuous energy distribution suggested that energy was not conserved during the decay, which led Wolfgang Pauli, in 1930, to hypothesize the existence…