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Weak coupling strength constant

  1. Sep 22, 2009 #1
    When it is said that the relative strength of weak interaction is [tex]\ 10^{-5}[/tex],what does this mean?

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

    I had an impression that [tex]\alpha_w[/tex] should be [tex]\ 10^{-5}[/tex].Which one is correct?
  2. jcsd
  3. Sep 22, 2009 #2
    "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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