Study of four-body decays $B_{(s)}\to (\pi \pi )(\pi \pi )$ in the perturbative QCD approach

Da-Cheng Yan, Zhou Rui, Yan Yan +1

In this work, we make a systematical study on the four-body $B_{(s)}\to (\pi \pi )(\pi \pi )$ decays in the perturbative QCD approach, where the $\pi \pi$ invariant mass spectra are dominated by t…