Study of electron-positron annihilation into four pions within chiral effective field theory in the low energy region

Jia-Yu Zhou, Hao-Xiang Pan, Ling-Yun Dai

In this paper, we employ chiral effective field theory to study the process of electron-positron annihilation into four pions in the low energy region within $E_{c.m.}\le 0.6$ GeV…