| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1853577 | Physics Letters B | 2008 | 6 Pages |
Abstract
Using 5.8×107J/ψ5.8×107J/ψ events collected in the BESII detector, the radiative decay J/ψ→γϕϕ→γK+K−KS0KL0 is studied. The ϕϕ invariant mass distribution exhibits a near-threshold enhancement that peaks around 2.24 GeV/c2/c2. A partial wave analysis shows that the structure is dominated by a 0−+0−+ state (η(2225)η(2225)) with a mass of 2.24−0.02+0.03−0.02+0.03 GeV/c2 and a width of 0.19±0.03−0.04+0.06 GeV/c2. The product branching fraction is: Br(J/ψ→γη(2225))⋅Br(η(2225)→ϕϕ)=(4.4±0.4±0.8)×10−4Br(J/ψ→γη(2225))⋅Br(η(2225)→ϕϕ)=(4.4±0.4±0.8)×10−4.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
M. Ablikim, J.Z. Bai, Y. Bai, Y. Ban, X. Cai, H.F. Chen, H.S. Chen, H.X. Chen, J.C. Chen, Jin Chen, X.D. Chen, Y.B. Chen, Y.P. Chu, Y.S. Dai, Z.Y. Deng, S.X. Du, J. Fang, C.D. Fu, C.S. Gao, Y.N. Gao, S.D. Gu, Y.T. Gu, Y.N. Guo, Z.J. Guo, F.A. Harris,