Reviving the energy-dependent partonic structure of $f_0(980)$ via two-pion distribution amplitudes

Shan Cheng, Ling-yun Dai, Jian-ming Shen +1

We present a novel framework for analyzing four-body semileptonic weak decays, performing the first high-twist analysis of the $D_s\to {\left[\pi \pi \right]}_{\mathrm{S}}$ form factors using…