About recommended fine structure constant value

  • Thread starter sanko
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  • #1
sanko
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value of fine structure constant logarithmically depend upon momentum/energy scale.
so what is exact energy/momentum scale corresponds to standard/recommended value of fine structure constant?
 

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  • #3
sanko
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fzero thanks for reply , Q^2=0 is it any base value or it means zero momentum? its unlikely that it means zero momentum.
 
  • #4
Vanadium 50
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It means zero momentum.
 
  • #5
fzero
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I guess it's technically at the electron mass. I ran the value of [tex]\alpha(M_W)\sim 128[/tex] down and found agreement.
 

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