Search for the lepton number violation decay ω→π + π + e − e −+c.c.*
M. G. Zhao, M. N. Achasov, P. Adlarson, X. C. 小聪 Ai 艾 et autres
Abstract Lepton number violation decay is searched for via using a data sample of events collected via the BESIII detector at the BEPCII collider. No significant signal is observed, and the upper limit on the branching fraction of at the 90% confidence …