Preprint
Sep 2026
Observation of $\eta(2600)$ and Threshold Enhancements in the $\Lambda\bar{\Lambda}$ System
Using $2712.4 \pm 14.3$ million $\psi(3686)$ events collected with the BESIII detector, the $\Lambda\bar{\Lambda}$ system produced in $\psi(3686)$ radiative decays is studied. A model-independent partial wave analysis reveals a significant threshold enhancement structure dominated by the $^1S_0$ and $^3P_0$ partial wav...
Besiii Collaboration M. Ablikim, M. N. Achasov, P. Adlarson et al.
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