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I Tetraquarks discovered

  1. Apr 5, 2016 #1
    I just heard of these, can somebody explain what they are, how they were discovered, and the implications of their existence?
     
  2. jcsd
  3. Apr 5, 2016 #2

    ZapperZ

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  4. Apr 5, 2016 #3

    mfb

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    Or better this from LHCb for a proper analysis (different state).
     
  5. Apr 5, 2016 #4
    Thanks ZZ, I had not seen that. The DZero link was very informative.
     
  6. Apr 14, 2017 #5
    I understand that these exotic particles are termed X Y and Z, and that the Y(4140) was recently renamed X(4140) by the Particle Data Group . Can someone explain the difference between X Y and Z please?
     
  7. Apr 15, 2017 #6

    mfb

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    This paper with figure 2 would suggest Z for charged states, X for C even and Y for C odd states, but I don't know if that naming scheme is used universally, especially as these slides include a neutral Z (slide 11).
     
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