论文标题
$ \ bar b_s^0 \ to j/ψπ^0η$ decay和$ a_0（980）-f_0（980）$混合
The $\bar B_s^0 \to J/ψπ^0 η$ decay and the $a_0(980)-f_0(980)$ mixing
论文作者
论文摘要
We study the $\bar B_s^0 \to J/ψf_0(980)$ and $\bar B_s^0 \to J/ψa_0(980)$ reactions, and pay attention to the different sources of isospin violation and mixing of $f_0(980)$ and $a_0(980)$ resonances where these resonances are dynamically generated from meson-meson 相互作用。我们发现，违反同义的主要原因是介子 - 梅森过渡$ t $矩阵中的同义破裂，另一个来源是，涉及kaons涉及生产机制的循环由于被带电和中性的kaons群体而没有取消。我们获得了$ A_0（980）$生产$ 5 \ times 10^{ - 6} $的分支比率。未来的实验可以解决这个问题，$π^0η$质量分布的生产率和形状肯定会有助于更好地理解标量共振的性质。
We study the $\bar B_s^0 \to J/ψf_0(980)$ and $\bar B_s^0 \to J/ψa_0(980)$ reactions, and pay attention to the different sources of isospin violation and mixing of $f_0(980)$ and $a_0(980)$ resonances where these resonances are dynamically generated from meson-meson interaction. We find that the main cause of isospin violation is the isospin breaking in the meson-meson transition $T$ matrices, and the other source is that the loops involving kaons in the production mechanism do not cancel due to the different masses of the charged and neutral kaons. We obtain a branching ratio for $a_0(980)$ production of the order of $5 \times 10^{-6}$. Future experiments can address this problem, and the production rate and shape of the $π^0 η$ mass distribution will definitely help to better understand the nature of scalar resonances.
