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Investigation of Delta⁰Delta⁰ dibaryon in QCD
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Investigation of Delta⁰Delta⁰ dibaryon in QCD
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We study a hypothetical $\Delta^0\Delta^0$ dibaryon state by means of QCD sum rule method. We construct a scalar interpolating current to extract the mass and decay constant of this state taking into account contributions of various quark, gluon and mixed vacuum condensates. The predictions for the mass and decay constants are $m_D=2326^{+114}_{-126} ~\mathrm{MeV}$ and $f_D=2.94^{+0.30}_{-0.34}\times 10^{-4} ~\mathrm{GeV}^7$, respectively. We also made an estimation about binding energy and size of the $\Delta^0\Delta^0$ dibaryon. The obtained mass value is below the $\Delta^0\Delta^0$ threshold and may be a good dibaryon candidate for being observed experimentally.
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