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First Measurement of the Decay Asymmetry in the pure W-boson-exchange Decay \(Λ_{c}^{+}\toΞ^{0}K^{+}\)

By Besiii Collaboration and others
Based on \(4.4~\text{fb}^{-1}\) of \(e^{+}e^{-}\) annihilation data collected at the center-of-mass energies between \(4.60\) and \(4.70~\text{GeV}\) with the BESIII detector at the BEPCII collider, the pure W-boson-exchange decay \(\Lambda_{c}^{+}\to\Xi^{0}K^{+}\) is studied with a full angular analysis. The corresponding decay asymmetry is measured for the first time to be $\alpha_{\Xi^{0}K^{+}}=0.01\pm0.16({\rm stat.})\pm0.03({\rm... Show more
January 20, 2024
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