Role of $a_0(980)$ in the decays $D^{0} \rightarrow K^{+} K^{-} η$ and $π^{+} π^{-} η$

In present work, we study the reactions $D^{0} \to K^{+} K^{-} η$ and $D^{0} \to π^{+} π^{-} η$ , and find that the $a_{0} (980)$ state plays a dominant role. At the quark level, the external and internal $W$ -emission mechanisms are taken into account, which can hadronize into the final states, and then the $a_{0} (980)$ state is generated from the final state interaction. Besides, the contributions of other intermediate resonances, such as $ρ (770)$ and $φ (1020)$ , are also considered. We make a combined fit of the invariant mass spectra measured by the Belle and BESIII Collaborations, where the results are in good agreement with the experiments, and the signal of the $a_{0} (980)$ shows great significance. Besides, the antisymmetry data for the production of the $a_{0} (980)^{+}$ and $a_{0} (980)^{-}$ is described well in the combined fit.

Role of $a_{0} (980)$ in the decays $D^{0} \to K^{+} K^{-} η$ and $π^{+} π^{-} η$

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Role of $a_{0} (980)$ in the decays $D^{0} \to K^{+} K^{-} η$ and $π^{+} π^{-} η$

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Role of a0(980)a0​(980) in the decays D0→K+K−ηD0→K+K−η and π+π−ηπ+π−η

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Role of a0(980)a0​(980) in the decays D0→K+K−ηD0→K+K−η and π+π−ηπ+π−η

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Role of $a_{0} (980)$ in the decays $D^{0} \to K^{+} K^{-} η$ and $π^{+} π^{-} η$

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AI智能校验

Role of $a_{0} (980)$ in the decays $D^{0} \to K^{+} K^{-} η$ and $π^{+} π^{-} η$

讲解博客

AI智能校验