Year: 2026
Type: preprint
Abstract: Using $(2712.4\pm14.3)\times10^{6}$ $ψ(3686)$ events collected with the BESIII detector at the BEPCII collider, we report the first observations of the decay $χ_{cJ}(J=0,1,2) \to Σ^0\barΣ^0η$. The signal significances, after considering systematic uncertainties, are determined to be 7.2$σ$, 5.7$σ$, and 6.7$σ$ for $χ_0$, $χ_{c1}$, and $χ_{c2}$, respectively. The branching fractions are measured to be $\mathcal B(χ_{c0}\toΣ^0\barΣ^0η)=({9.7 \pm 1.7 \pm 0.8}) \times 10^{-5}$, $\mathcal B(χ_{c1}\toΣ^0\barΣ^0η)=({4.9 \pm 1.1 \pm 0.4}) \times 10^{-5}$, and $\mathcal B(χ_{c2}\toΣ^0\barΣ^0η)=({6.1 \pm 1.2 \pm 0.3}) \times 10^{-5}$, where the first uncertainties are statistical and the second systematic. No significant structure in the $Σ^0\barΣ^0,Σ^0η,\barΣ^0η$ mass distributions is observed under the current statistics.
Source: arXiv (Cornell University)
Author: BESIII Collaboration
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funders: Strong, Deutsche Forschungsgemeinschaft, National Natural Science Foundation of China, Chinese Academy of Sciences, National Research Foundation of Korea, Knut och Alice Wallenbergs Stiftelse, Vetenskapsrådet, Istituto Nazionale di Fisica Nucleare, Shanghai Key Laboratory for Particle Physics and Cosmology, Science and Technology Facilities Council, Institute of High Energy Physics
Awards: G1907155555, BESIII上正反超子对关联产生及其衰变的实验研究, G2084762544, G2777307501, G3107731600, G3234280719, G328816031, BESIII上胶球的寻找和轻介子谱的研究, G3534486373, G387734, G466842207, G4883783264, G5170186115, G567888578, G5722467317, G6119985531, 北京谱仪III上Ds衰变的实验研究, G6371861488, 北京正负电子对撞机BESIII实验上粲重子Λc研究, G6746531785, G6845169765, G6927153966, G7200992521, G7692396955, G783835211, G7921044504, G8158558910, G8396383697, G904559116, G945438540, G965723986
OpenAlex ID: W7221768063