Study of the decay J / ψ → ϕ π 0 η

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doi:10.1103/PhysRevD.110.112014

Title: Study of the decay $J / ψ \to ϕ π^{0} η$

Journal Article · 23 December 2024 · Physical Review. D.

DOI: https://doi.org/10.1103/PhysRevD.110.112014 · OSTI ID:2483703

Ablikim, M.; Achasov, M. N.; Adlarson, P.; Ai, X. C.; Aliberti, R.; Amoroso, A.; An, M. R.; An, Q.; Bai, Y.; Bakina, O.; Balossino, I.; Ban, Y.; Bao, H. -R.; Batozskaya, V.; Begzsuren, K.; Berger, N.; Berlowski, M.; Bertani, M.; Bettoni, D.; Bianchi, F. more »

Based on $(10.09 \pm 0.04) \times 10^{9} J / ψ$ events collected with the BESIII detector operating at the BEPCII collider, a partial wave analysis of the decay $J / ψ \to ϕ π^{0} η$ is performed. We observe for the first time two new structures on the $ϕ η$ invariant mass distribution, with significances exceeding $27 σ$ and $13 σ$ ; the first with $J^{PC} = 1^{+ -}$ , mass $M = (1908 \pm 6 (stat)_{- 4}^{+ 8} (sys)) MeV / c^{2}$ , and width $Γ = (175 \pm 13 (stat)_{- 16}^{+ 7} (sys)) MeV$ , the second with $J^{PC} = 1^{- -}$ , mass $M = (1992 \pm 12 (stat)_{- 6}^{+ 15} (sys)) MeV / c^{2}$ , and width $Γ = (132 \pm 22 (stat)_{- 4}^{+ 17} (sys)) MeV$ . These measurements provide important input for the strangeonium spectrum. In addition, the $f_{0} (980) - a_{0} (980)^{0}$ mixing signal in $J / ψ \to ϕ f_{0} (980) \to ϕ a_{0} (980)^{0}$ and the corresponding electromagnetic decay $J / ψ \to ϕ a_{0} (980)^{0}$ are measured with improved precision, providing crucial information to understand the nature of $a_{0} (980)^{0}$ and $f_{0} (980)$ . Published by the American Physical Society 2024

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Sponsoring Organization:: USDOE

Grant/Contract Number:: FG02-05ER41374

OSTI ID:: 2483703

Journal Information:: Physical Review. D., Journal Name: Physical Review. D. Journal Issue: 11 Vol. 110; ISSN PRVDAQ; ISSN 2470-0010

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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