Search for the rare decay of Psi(3686) -> Lambda+pe(+)e(-) +c.c. at BESIII
Citation
Kolcu O. B., Ahmed S., Albrecht M., Bai J. Z., Bakina O... Search for the rare decay of Psi(3686) -> Lambda+pe(+)e(-) +c.c. at BESIII. Physical Review D. 2018; 97 (9): 1-7.Abstract
Based on a data sample of (448.1 +/- 2.9) x 10(6)Psi(3686) decays collected with the BESIII experiment, a search for the flavor changing neutral current transition Psi(3686) -> Lambda(+)(c) pe(+) e(-) + c.c. is performed for the first time. No signal candidates are observed and the upper limit on the branching fraction of Psi(3686) -> Lambda(+)(c) pe(+) e(-) is determined to be 1.7 x 10(-6) at the 90% confidence level. The result is consistent with expectations from the standard model, and no evidence for new physics is found.
