First evidence for the decay K(L) ---> e+ e- mu+ mu-

YEE HSIUNG2018-09-102018-09-101996http://inspirehep.net/record/429934http://scholars.lib.ntu.edu.tw/handle/123456789/323324First evidence for the decay K(L) ---> e+ e- mu+ mu-journal article10.1103/PhysRevLett.76.4312