论文标题
梅森互动在$ d_s^{+} \rightarrowπ^{+}π^{+}π^{ - }η$ decay中的作用
The role of meson interactions in the $D_s^{+}\rightarrow π^{+}π^{+}π^{-}η$ decay
论文作者
论文摘要
我们对$ d_s^{+} \ toπ^{+}π^{+}π^{ - }η$ decay进行理论研究。我们首先查看基本的$ d_s^{+} $从外部和内部排放处的夸克级衰减。然后将一对或两对$ q \ bar {q} $状态放置在最后。允许将介子对进行最终状态互动，其中$ a_0（980）$，$ f_0（980）$，$ a_1（1260）$和$ b_1（1235）$ resonances是动态生成的。 $ g $ - 帕特族被用作可能的通道的过滤器，而从具有负$ g $ - parity的通道中，只能导致$π^{+}π^{+}π^{+}π^{ - }η$在最终状态下。使用从手性统一方法产生这些共振的过渡幅度，并获得一些自由参数，我们获得了Besiii实验中报道的六个质量分布的公平再现。
We perform a theoretical study of the $D_s^{+}\to π^{+}π^{+}π^{-}η$ decay. We look first at the basic $D_s^{+}$ decay at the quark level from external and internal emission. Then hadronize a pair or two pairs of $q\bar{q}$ states to have mesons at the end. Posteriorly the pairs of mesons are allowed to undergo final state interaction, by means of which the $a_0(980)$, $f_0(980)$, $a_1(1260)$, and $b_1(1235)$ resonances are dynamically generated. The $G$-parity is used as a filter of the possible channels, and from those with negative $G$-parity only the ones that can lead to $π^{+}π^{+}π^{-}η$ at the final state are kept. Using transition amplitudes from the chiral unitary approach that generates these resonances, and a few free parameters, we obtain a fair reproduction of the six mass distributions reported in BESIII experiment.
