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Isospin conservation and pi-meson

  1. May 6, 2010 #1


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    I am given this next question:
    Show that the new resonance Z+[4430] which is too heavy to consist entirely of d and u quarks cannot be a meson (which constitues from a quark and an anti quark).

    I am given that it's decay in a strong interaction to particles [tex]\psi',\pi^+[/tex]
    And I know that the first has isospin I=0 and the second I=1, and in strong interaction I is conserved, i.e Z+[4430] should have I=1 only, so if it were a meson it can only be composed of u and anti d or anti u and d, but from because of the remark it's not possible.

    Am I correct here?

    Thanks in advance.
  2. jcsd
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