### 学术活动

#### 物理大讲堂--青年学者论坛 (109)

In this talk, I would like to presentour study of the $D_s^+\to \pi^+(a_0(980)^0\to)\pi^0\eta$, $\pi^0(a_0(980)^+\to)\pi^+\eta$decays, whose branching fractions have been recently measured by BESIII.

We propose that $D_s^+\to\pi^{+(0)}(a_0(980)^{0(+)}\to)\pi^{0(+)}\eta$ receives the main contributionfrom the triangle rescattering process, where $\eta^{(\prime)}$ and $\rho^+$ in$D_s^+\to \eta^{(\prime)} \rho^+$, by exchanging $\pi^{0(+)}$, aretransformed as $a_0(980)^{0(+)}$ and $\pi^{+(0)}$, respectively. Accordingly,we calculate their branching fractions, in agreement with the data.

吉林大学理论物理中心