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Cabibbo Supression

  1. Mar 18, 2007 #1
    Hi,

    Could someone briefly explain Cabibbo suppression to me? I can't seem to find any info on it. Is it like OZI supression where things that decay through 3 gluons are suppressed?

    I found it in the paper "Search for CP Violation in Charged D Meson Decays" accessible here:
    http://arxiv.org/abs/hep-ex/9612005

    Thanks,
    Joe
     
  2. jcsd
  3. Mar 18, 2007 #2

    Meir Achuz

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    Originally, with three quarks (when Cabibbo was young), Cabibbo suppression meant that the u-s and d-s weak coupling was smaller than the u-d weak coupling. Now, with six quarks, Cabibbo suppression refers to decays that are not the most favored, because of the quark connections. Cabibbo favored decay of the D would have its c quarik decay to one s quark. All the decays they show need either two s quarks or none. In this sense, they are Cabibbo suppressed and are rare decays.
     
  4. Mar 18, 2007 #3
    That makes sense. Thanks!
     
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