报告题目:Lightscalar meson in charmed hadron decays

报告人:余耀 博士，重庆邮电大学

报告时间:2021年4月29日下午4点

报告地点:伟德BETVlCTOR1946中心校区物理楼302

报告摘要:

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.

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　　　　　伟德BETVlCTOR1946理论物理中心