Observation of J/psi -> p(p)over-bara(0)(980) at BESIII
- Ablikim, M.
- Achasov, M. N.
- Ai, X. C.
- Albayrak, O.
- Albrecht, M.
- Ambrose, D. J.
- An, F. F.
- An, Q.
- Bai, J. Z.
- Ferroli, R. Baldini
- Ban, Y.
- Bennett, D. W.
- Bennett, J. V.
- Bertani, M.
- Bettoni, D.
- Bian, J. M.
- Bianchi, F.
- Boger, E.
- Bondarenko, O.
- Boyko, I.
- Braun, S.
- Briere, R. A.
- Cai, H.
- 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, X. R.
- Chen, Y. B.
- Cheng, H. P.
- Chu, X. K.
- Chu, Y. P.
- Cibinetto, G.
- Cronin-Hennessy, D.
- Haddadi, Z.
- Kalantar-Nayestanaki, N.
- Kavatsyuk, M.
- Loehner, H.
- Messchendorp, J. G.
- Moeini, H.
- Tiemens, M.
Publication date
September 2014
DOIAbstract
Using 2.25 x 10(8) J/psi events collected with the BESIII detector at the BEPCII storage rings, we observe for the first time the process J/psi -> p (p) over bara(0)(980) -> pi(0)eta with a significance of 6.5 sigma (3.2 sigma including systematic uncertainties). The product branching fraction of J/psi -> p (p) over bara(0)(980) -> p (p) over bara(0)pi(0)eta is measured to be (6.8 +/- 1.2 +/- 1.3) x 10(-5), where the first error is statistical and the second is systematic. This measurement provides information on the a(0) production near threshold coupling to p (p) over bar and improves the understanding of the dynamics of J/psi decays to four-body processes.</p
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