PreprintCC BY 4.0arXiv
Measurements of the branching fractions of \boldmath χcJ→Σ0Σ̅0η
Abstract
Using (2712.4±14.3)×106 ψ(3686) events collected with the BESIII detector at the BEPCII collider, we report the first observations of the decay χcJ(J=0,1,2) → Σ0Σ̅0η. The signal significances, after considering systematic uncertainties, are determined to be 7.2σ, 5.7σ, and 6.7σ for χ0, χc1, and χc2, respectively. The branching fractions are measured to be ℬ(χc0→Σ0Σ̅0η)=(9.7 ± 1.7 ± 0.8) × 10−5, ℬ(χc1→Σ0Σ̅0η)=(4.9 ± 1.1 ± 0.4) × 10−5, and ℬ(χc2→Σ0Σ̅0η)=(6.1 ± 1.2 ± 0.3) × 10−5, where the first uncertainties are statistical and the second systematic. No significant structure in the Σ0Σ̅0,Σ0η,Σ̅0η mass distributions is observed under the current statistics.
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BibTeX
@misc{collaboration2026measurements,
title = {{Measurements of the branching fractions of \boldmath $χ_cJ\toΣ^0\barΣ^0η$}},
author = {BESIII Collaboration},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.15332},
eprint = {2610.15332},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.15332},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Measurements of the branching fractions of \boldmath χ_cJ→Σ^0Σ̅^0η
AU - BESIII Collaboration
PY - 2026
DA - 2026/10/11
PB - arXiv
DO - 10.48550/arxiv.2610.15332
UR - https://arxiv.org/abs/2610.15332
AB - Using (2712.4±14.3)×10^6 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) → Σ^0Σ̅^0η. The signal significances, after considering systematic uncertainties, are determined to be 7.2σ, 5.7σ, and 6.7σ for χ_0, χ_c1, and χ_c2, respectively. The branching fractions are measured to be ℬ(χ_c0→Σ^0Σ̅^0η)=(9.7 ± 1.7 ± 0.8) × 10^−5, ℬ(χ_c1→Σ^0Σ̅^0η)=(4.9 ± 1.1 ± 0.4) × 10^−5, and ℬ(χ_c2→Σ^0Σ̅^0η)=(6.1 ± 1.2 ± 0.3) × 10^−5, where the first uncertainties are statistical and the second systematic. No significant structure in the Σ^0Σ̅^0,Σ^0η,Σ̅^0η mass distributions is observed under the current statistics.
ER -