Search for the rare decay of Psi(3686) -> Lambda+pe(+)e(-) +c.c. at BESIII

BESIII Collaboration, Haddadi, Z., Kalantar-Nayestanaki, N., Kavatsyuk, M., Messchendorp, J. G. & Tiemens, M., 4-May-2018, In : Physical Review D. 97, 9, 7 p., 091102.

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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.
Original languageEnglish
Article number091102
Number of pages7
JournalPhysical Review D
Issue number9
Publication statusPublished - 4-May-2018



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