Based on (10.09±0.04)×109 J/ψ events collected with the BESIII detector operating at the BEPCII collider, a partial wave analysis of the decay J/ψ→φπ0η is performed. We observe for the first time two new structures on the φη invariant mass distribution, with significances exceeding 27σ and 13σ; the first with JPC=1+-, mass M=(1908±6(stat) -4+8(sys)) MeV/c2, and width Γ=(175±13(stat) -16+7(sys)) MeV, the second with JPC=1 - , mass M=(1992±12(stat) -6+15(sys)) MeV/c2, and width Γ=(132±22(stat) -4+17(sys)) MeV. These measurements provide important input for the strangeonium spectrum. In addition, the f0(980)-a0(980)0 mixing signal in J/ψ→φf0(980)→φa0(980)0 and the corresponding electromagnetic decay J/ψ→φa0(980)0 are measured with improved precision, providing crucial information to understand the nature of a0(980)0 and f0(980).

Study of the decay 𝐽/𝜓→𝜙⁢𝜋0⁢𝜂

Amoroso, A.;Bianchi, F.;Destefanis, M.;De Mori, F.;Greco, M.;Maggiora, M.;Marcello, S.;Sosio, S.;Spataro, S.;
2024-01-01

Abstract

Based on (10.09±0.04)×109 J/ψ events collected with the BESIII detector operating at the BEPCII collider, a partial wave analysis of the decay J/ψ→φπ0η is performed. We observe for the first time two new structures on the φη invariant mass distribution, with significances exceeding 27σ and 13σ; the first with JPC=1+-, mass M=(1908±6(stat) -4+8(sys)) MeV/c2, and width Γ=(175±13(stat) -16+7(sys)) MeV, the second with JPC=1 - , mass M=(1992±12(stat) -6+15(sys)) MeV/c2, and width Γ=(132±22(stat) -4+17(sys)) MeV. These measurements provide important input for the strangeonium spectrum. In addition, the f0(980)-a0(980)0 mixing signal in J/ψ→φf0(980)→φa0(980)0 and the corresponding electromagnetic decay J/ψ→φa0(980)0 are measured with improved precision, providing crucial information to understand the nature of a0(980)0 and f0(980).
2024
110
11
1
12
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, ...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/2067871
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