Using (448.1±2.9)×106 ψ(3686) events collected with the BESIII detector, we perform the first search for the weak baryonic decay ψ(3686) → Λ+c Σ¯− + c.c.. The analysis procedure is optimized using a blinded method. No significant signal is observed, and the upper limit on the branching fraction (B) of ψ(3686) → Λ+c Σ¯− + c.c. is set as 1.4 × 10−5 at the 90% confidence level.
Search for the weak decay ψ(3686) → Λ+c Σ¯− + c.c.
Amoroso A.;Bianchi F.;Bortone A.;Destefanis M.;De Mori F.;Greco M.;Lavezzi L.;Maggiora M.;Marcello S.;Sosio S.;Spataro S.;
2023-01-01
Abstract
Using (448.1±2.9)×106 ψ(3686) events collected with the BESIII detector, we perform the first search for the weak baryonic decay ψ(3686) → Λ+c Σ¯− + c.c.. The analysis procedure is optimized using a blinded method. No significant signal is observed, and the upper limit on the branching fraction (B) of ψ(3686) → Λ+c Σ¯− + c.c. is set as 1.4 × 10−5 at the 90% confidence level.File in questo prodotto:
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