The meson $Z^{+}(4430)$ as a tetraquark state

M. E. Bracco, S. H. Lee, M. Nielsen +1

We test the validity of the QCD sum rules applied to the meson $Z^{+}(4430)$, by considering a diquark-antidiquark type of current with $J^P=0^{-}$ and with $J^P=1^{-}$. We find…