Abouzaid E. et al.YEE HSIUNG2018-09-102018-09-102005-08http://inspirehep.net/record/689077http://scholars.lib.ntu.edu.tw/handle/123456789/315778A Measurement of the K0 charge radius and a CP violating asymmetry together with a search for CP violating e1 direct photon emission in the rare decay K(L) ---> pi+ pi- e+ e-journal article10.1103/PhysRevLett.96.101801