Ablikim, Medina N.Achasov, M. N.Adlarson, PatrikAhmed, ShakeelÇetin, Serkant AliKolcu, Onur Buğra2021-10-282021-10-282021BESIII Collaboration, Ablikim, M., Achasov, M. N., Adlarson, P., Ahmed, S., Albrecht, M., Aliberti, R., Amoroso, A., An, M. R., An, Q., Bai, X. H., Bai, Y., Bakina, O., Ferroli, R. B., Balossino, I., Ban, Y., Begzsuren, K., Berger, N., Bertani, M., … Zou, J. H. (2021). Search for the hyperon semileptonic decay $\Xi^{-} \rightarrow \Xi^{0} e^{-} \bar{\nu_{e}}$. https://doi.org/10.1103/PhysRevD.104.072007https://doi.org/10.1103/PhysRevD.104.072007https://hdl.handle.net/20.500.12713/2193Using events collected by the Beijing Spectrum III (BESIII) detector at the Beijing Electron Positron Collider II (BEPCII) collider, we search for the hyperon semileptonic decay . No significant signal is observed and the upper limit on the branching fraction is set to be at 90% confidence level. This result is one order of magnitude more strict than the previous best limit. © 2021 Published by the American Physical Societyeninfo:eu-repo/semantics/openAccessHigh Energy PhysicsExperimentArticle104718WOS:0007074782000012-s2.0-85117389707Q110.1103/PhysRevD.104.072007N/A