Search for the rare decay of $\psi (3686)\to {\Lambda }_c^{+}\overline{p}{e}^{+}{e}^{-}+c.c.$ at BESIII

Abstract

Based on a data sample of $(448.1\pm 2.9)\times 10^6\psi (3686)$ decays collected with the BESIII experiment, a search for the flavor changing neutral current transition $\psi (3686)\to {\Lambda }_c^{+}\overline{p}{e}^{+}{e}^{-}+c.c.$ is performed for the first time. No signal candidates are observed and the upper limit on the branching fraction of $\psi (3686)\to {\Lambda }_c^{+}\overline{p}{e}^{+}{e}^{-}$ is determined to be $1.7\times 10^{-6}$ at the 90\% confidence level. The result is consistent with expectations from the Standard Model, and no evidence for new physics is found.

arXiv comment6 pages, 2 figures. Accepted by PRD

References in corpus (15)

• Design and Construction of the BESIII Detector
• The Precision Monte Carlo Event Generator KK For Two-Fermion Final States In e+e- Collisions
• Coherent Exclusive Exponentiation For Precision Monte Carlo Calculations
• Limits and Confidence Intervals in the Presence of Nuisance Parameters
• Topcolor Assisted Technicolor
• Measurement of the ${\mathrm{e}}^{+}{\mathrm{e}}^{-}\to {\pi }^{+}{\pi }^{-}$ Cross Section between 600 and 900 MeV Using Initial State Radiation
• Precision measurement of the integrated luminosity of the data taken by BESIII at center of mass energies between 3.810 GeV and 4.600 GeV
• Measurements of absolute hadronic branching fractions of ${\Lambda }_c^{+}$ baryon
• Determination of the number of $\psi (3686)$ events at BESIII
• The transition form factors for semi-leptonic weak decays of $J/\psi$ in QCD sum rules
• Flavor Changing processes in Quarkonium Decays
• Measurement of ${\eta }^{\prime }\to {\pi }^{+}{\pi }^{-}{e}^{+}{e}^{-}$ and ${\eta }^{\prime }\to {\pi }^{+}{\pi }^{-}{\mu }^{+}{\mu }^{-}$
• Search for the Lepton Flavor Violation Process $J/\psi \to e\mu$ at BESIII
• FCNC-induced semileptonic decays of $J/\psi$ in the Standard Model
• Search for the rare decays $J/\psi \to D^0{e}^{+}{e}^{-}+c.c.$ and $\psi (3686)\to D^0{e}^{+}{e}^{-}+c.c.$

Cited by in corpus (1)

• Search for the weak decay $\psi (3686)\to {\Lambda }_c^{+}{\bar{\Sigma }}^{-}+c.c$