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Is the CMK matrix a constant for all experimental energies?

  1. Aug 27, 2011 #1
    Is the CMK matrix a constant for all experimental energies that we can presently explore?

    Thanks for your help!
  2. jcsd
  3. Aug 27, 2011 #2


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    The CKM matrix gives ratios between weak decay rates, for example n → peν vs Λ → peν. There is no energy range involved.
  4. Aug 28, 2011 #3
    In the standard model these parameters do run with energy, e.g. see section 4.7 of http://arxiv.org/abs/hep-ph/9912358.

    If such running has been observed it ought to be in http://pdg.lbl.gov/2011/reviews/rpp2011-rev-ckm-matrix.pdf" [Broken] but I don't see it mentioned. It may just be too small to be seen.
    Last edited by a moderator: May 5, 2017
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