Ablikim, M.Achasov, M. N.Adlarson, P.Ahmed, S.Albrecht, M.Aliberti, R.Çetin, Serkant Ali2024-07-182024-07-1820211029-8479https://doi.org/10.1007/JHEP06(2021)157https://hdl.handle.net/11411/7058Using 10.1 x 10(9)J/ events produced by the Beijing Electron Positron Collider (BEPCII) at a center-of-mass energy s = 3.097 GeV and collected with the BESIII detector, we present a search for the rare semi-leptonic decay J/psi -> D(-)e(+)nu (e) + c.c. No excess of signal above background is observed, and an upper limit on the branching fraction B(J/psi -> D(-)e(+)nu (e)+c. c.)<7.1x10(-8) is obtained at 90% confidence level. This is an improvement of more than two orders of magnitude over the previous best limit.eninfo:eu-repo/semantics/openAccessE(+)-E(-) ExperimentsWeak DecaysHeavy QuarkoniumArticle2-s2.0-8510899670110.1007/JHEP06(2021)1576Q2Q1WOS:000668633400005