Accès ouvert
2023
preprint
OpenAlex
BESIII Collaboration, M. Ablikim, M. N. Achasov, P. Adlarson et autres
The $J/ψ\to Ξ^0 \barΞ^{0}$ process and subsequent decays are investigated using $(10087 \pm 44)\times 10^6$ $J/ψ$ events collected at the BESIII experiment. The decay parameters of $Ξ^0$ and $\barΞ^0$ are measured with greatly improved precision over previous measurements to be $α_Ξ = …
Accès ouvert
2022
preprint
OpenAlex
BESIII Collaboration, M. Ablikim, M. N. Achasov, P. Adlarson et autres
By analyzing $(448.1\pm2.9)\times10^6$ $ψ(3686)$ events collected with the BESIII detector operating at the BEPCII collider, the decays of $χ_{cJ} \to Λ\bar Λη$ ($J=0$, 1 and 2) are observed for the first time with statistical significances of $13.9σ$, $6.7σ$, and $8.2σ$, respectively. The …
Accès ouvert
2021
preprint
OpenAlex
F. De Mori, Mikhail N. Achasov, P. Adlarson, S. Ahmed et autres
By analyzing $4.48\times10^8$ $\psi(3686)$ events collected with the BESIII detector, we observe the decays $\chi_{cJ} \to n K^0_S\bar\Lambda + c.c.$ ($J=0$, 1, 2) for the first time, via the radiative transition $\psi(3686) \to \gamma \chi_{cJ}$. The branching fractions are determined to be …