Search for the Rare Semi-leptonic Decay J/psi -> D(-)e(+)nu(e) + c.c.
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2021Metadata
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Ablikim, M., Achasov, M. N., Adlarson, P., Ahmed, S., Albrecht, M., Aliberti, R., ... & BESIII Collaboration. (2021). Search for the rare semi-leptonic decay $ J/\psi\to D^{-} e^{+}\nu_ {e}+ cc$. arXiv preprint arXiv:2104.06628.Abstract
Using 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.
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Journal of High Energy PhysicsVolume
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