The ■s0→J/ψπ0η decay and the a0(980)-f0(980) mixing

作者：李嘉婷; 林佳欣; 张功杰; 梁伟红^*; E.Oset

来源：Chinese Physics C, 2022, 46(08): 127-132.

We study the ■s0→J/ψf0(980) and ■s0→J/ψa0(980) reactions,and pay attention to the different sources of iso spin violation and mixing of f0(980) and a0(980) resonances where these resonances are dynamically generated from meson-meson interactions.We find that the main cause of isospin violation is 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 charged and neutral kaons.We obtain a branching ratio for a0(980)production of the order of 5×10-6.Future experiments can address this problem,and the production rate and shape of the π0η mass distribution will definitely help to better understand the nature of scalar resonances.