Weak coupling strength constant

neelakash
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When it is said that the relative strength of weak interaction is \ 10^{-5},what does this mean?

On calculation I am getting \alpha_w=\10^{-3} with \ G_F=\ 1.16\times\ 10^{-5} \ GeV^{-2}

I had an impression that \alpha_w should be \ 10^{-5}.Which one is correct?
 
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"relative strength" is not a very well-defined concept. The ratio of weak to electromagnetic interaction strengths depends a lot on the energy scale.
 

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