论文标题
两个动态生成的$ A_0 $共振，通过向量介子之间的交互
Two dynamical generated $a_0$ resonances by interactions between vector mesons
论文作者
论文摘要
我们通过在耦合通道方法中的载体中的耦合（包括它们与伪内膜中的频道的耦合）之间的相互作用来研究动态产生$ a_0 $的共振。载体和伪级介子都被认为是$ t $通道交换用于计算媒介介子之间相互作用的介体。类似于$ a_0（980）$作为$ k \ bar k-πη$动态生成的状态，有一个$ a_0（1710）$作为耦合通道的动态生成的状态，附近$ k^*\ bar {k}^*$ threshold。所涉及的通道是$ ρϕ，k^*\ bar {k}^*，ρΩ，k \ bar {k}，πη$。此$ a_0 $主要衰减到$ρΩ$，$πη$和$ k \ bar {k} $。该极与耦合通道效应很大程度上息息相关。如果我们关闭$ ρϕ $或$ k^*\ bar {k}^*$，则杆消失了。此外，发现$ A_0（1450）$也可以由$ρΩ$ Ithacsions动态生成，这是由于$π$和$η$ Exchange的。
We study dynamically generated $a_0$ resonances by interactions between vector mesons including their coupling to channels of pseudoscalar mesons within coupled-channel approach. Both vector and pseudoscalar mesons are considered as $t$-channel exchanged mesons for calculating interactions between vector mesons. Analogous to $a_0(980)$ as a $K\bar K-πη$ dynamically generated state, there is an $a_0(1710)$ as a coupled channel dynamically generated state near $K^*\bar{K}^*$ threshold. The channels involved are $ρϕ,K^*\bar{K}^*,ρω, K\bar{K},πη$. This $a_0$ mainly decays to $ρω$, $πη$ and $K\bar{K}$. This pole is much tied to the coupled channel effect. If we turn off either $ρϕ$ or $K^*\bar{K}^*$, the pole disappears. In addition, it is found that $a_0(1450)$ may also be dynamically generated by $ρω$ interactions due to $π$ and $η$ exchange.
