Fermi Coupling Constant (`GeV^-2`)

The Fermi Coupling Constant constant (0.00001166364 1/GeV²) represents the strength of Fermi's interaction which explains beta decay.  

• 1.1663787(6) x 10^-5 GeV^-2
• 4.5437957 x 10¹⁴ J^-2

The Fermi Coupling Constant, G_F. is defines as:

`G_F^0` = G_F/(`barh*c`)³ = `(sqrt(2) *g^2)/ (8*(m_w^2 c^4)`  

where:

• `G_F^0` = Fermi Coupling Constant
• g = the coupling constant of the weak interaction
• m_W = the mass of the W boson.

Notes

This constant is specified with a standard uncertainty (standard deviation) of: 0.000005 E-5 `GeV^-2`