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QCD sum rules study of the meson Z^+(4430) · Around

2007

QCD sum rules study of the meson Z^+(4430)

Lee, Su Houng, Mihara, Antonio, Navarra, Fernando S. et al.

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We use QCD sum rules to study the recently observed meson $Z^+(4430)$, considered as a $D^*D_1$ molecule with $J^{P}=0^{-}$.

We consider the contributions of condensates up to dimension eight and work at leading order in $\alpha_s$.
We get $m_Z=(4.40\pm0.10) \GeV$ in a very good agreement with the experimental value.
We also make predictions for the analogous mesons $Z_{s}$ and $Z_{bb}$ considered as $D_s^*D_1$ and $B^*B_1$ molecules respectively.

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