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Fermi's constant

  1. Mar 9, 2008 #1
    what is the value of fermi's constant ( GF ) in SI units?
    I tried to work it out, but it seems that I'm wrong, I got a value of: 6.5 X 10(41) J(-2)

    Does it make sense?
     
  2. jcsd
  3. Mar 9, 2008 #2
    Google calculator gives:

    [tex]
    G_F = 4.54376275 \times 10^{14} J^{-2}
    [/tex]

    where

    [tex]
    \frac{G_F}{(\hbar c)^3} = 1.16637 \times 10^{-5} GeV^{-2}
    [/tex]

    I used the following code in Google:

    Code (Text):

    1.16637*10^-5 (GeV)^-2 in (Joules)^-2
     
     
  4. Mar 9, 2008 #3
    so, you mean Gf / (h.bar X c) ^ 3 = 4.5 X 10 (14),,, [ not the Gf itself] right?
     
  5. Mar 9, 2008 #4
    how to get it in cgs units,,, I don't know how to use google to convert the units!
     
  6. Mar 9, 2008 #5

    pam

    User Avatar

    If you know it in Joules, just convert Joules to ergs.
    You can do it in your head if google fails you.
     
  7. May 5, 2009 #6
    what is then Gf2=5.29 * 10-38 cm2/GeV2?
     
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