Study of the near-threshold omega phi mass enhancement in doubly OZI-suppressed J/psi -> gamma omega phi decays
- Ablikim, M.
- Achasov, M. N.
- Albayrak, O.
- Ambrose, D. J.
- An, F. F.
- An, Q.
- Bai, J. Z.
- Ban, Y.
- Becker, J.
- Bennett, J. V.
- Bertani, M.
- Bian, J. M.
- Boger, E.
- Bondarenko, O.
- Boyko, I.
- Briere, R. A.
- Bytev, V.
- Cai, X.
- Cakir, O.
- Calcaterra, A.
- Cao, G. F.
- Cetin, S. A.
- Chang, J. F.
- Chelkov, G.
- Chen, G.
- Chen, H. S.
- Chen, J.C.
- Chen, M.L.
- Chen, S. J.
- Chen, X.
- Chen, Y.B.
- Cheng, H. P.
- Chu, Y. P.
- Cronin-Hennessy, D.
- Dai, H. L.
- Dai, J.P.
- Dedovich, D.
- Deng, Z. Y.
- Denig, A.
- Denysenko, I.
- Destefanis, M.
- Ding, W. M.
- Ding, Y.
- Dong, L. Y.
- Dong, M. Y.
- Kalantar-Nayestanaki, N.
- Kavatsyuk, M.
- Liu, Cheng
- Loehner, H.
- Messchendorp, J. G.
DOIAbstract
A 2:25 x 10(8) J/psi event sample accumulated with the BESIII detector is used to study the doubly Okubo-Zweig-Iizuka-suppressed decay modes J/psi -> gamma omega phi, omega -> pi(+)pi(-)pi(0), phi -> K+K-. A strong deviation (> 30 sigma) from three-body J/psi -> gamma omega phi phase space is observed near the omega phi mass threshold that is consistent with a previous observation reported by the BESII experiment. A partial wave analysis with a tensor covariant amplitude that assumes that the enhancement is due to the presence of a resonance, the X(1810), is performed and confirms that the spin-parity of the X(1810) is 0(++). The mass and width of the X(1810) are determined to be M = 1795 +/- 7(stat)(-5)(+13) (syst) +/- 19(mo...
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