Lepton number violation decay ω → π+π+e−e− + c.c. is searched for via J/ψ → ωη using a data sample of (1.0087 ± 0.0044) × 1010 J/ψ events collected via the BESIII detector at the BEPCII collider. No significant signal is observed, and the upper limit on the branching fraction of ω → π+π+e−e− + c.c. at the 90% confidence level is determined for the first time to be 2.8 × 10−6.
Search for the lepton number violation decay ω→π+π+e−e−+c.c.
Amoroso, A.;Bianchi, F.;Destefanis, M.;De Mori, F.;Greco, M.;Maggiora, M.;Marcello, S.;Sosio, S.;Spataro, S.;
2025-01-01
Abstract
Lepton number violation decay ω → π+π+e−e− + c.c. is searched for via J/ψ → ωη using a data sample of (1.0087 ± 0.0044) × 1010 J/ψ events collected via the BESIII detector at the BEPCII collider. No significant signal is observed, and the upper limit on the branching fraction of ω → π+π+e−e− + c.c. at the 90% confidence level is determined for the first time to be 2.8 × 10−6.
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