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Revisiting 1⁻⁺ and 0⁺⁺ light hybrids from Monte-Carlo based QCD sum rules
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Revisiting 1⁻⁺ and 0⁺⁺ light hybrids from Monte-Carlo based QCD sum rules
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In this paper, we re-analyze the $1^{-+}$ and $0^{++}$ light hybrids from QCD sum rules with a Monte-Carlo based uncertainty analysis. With $30\%$ uncertainties in the accepted central values for QCD condensates and other input parameters, we obtain a prediction on $1^{-+}$ hybrid mass of $1.71 \pm 0.22$\,GeV, which covers the mass of $\pi_1(1600)$. However, the $0^{++}$ hybrid mass prediction is more than 4\,GeV, which is far away from any known $a_0$ meson. We also study the correlations between the input and output parameters of QCD sum rules.
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