Search for the decay hc → π0 J/ψ

Ablikim, M.; Achasov, M. N.; Adlarson, P.; Ahmed, S.; Albrecht, M.; Aliberti, R.; Amoroso, A.; An, M. R.; An, Q.; Bai, X. H.; Bai, Y.; Bakina, O.; BaldiniFerroli, R.; Balossino, I; Ban, Y.; Begzsuren, K.; Berger, N.; Bertani, M.; Bettoni, D.; Bianchi, F.; Bloms, J.; Bortone, A.; Boyko, I; Briere, R. A.; Cai, H.; Cai, X.; Calcaterra, A.; Cao, G. F.; Cao, N.; Cetin, S. A.; Chang, J. F.; Chang, W. L.; Chelkov, G.; Chen, D. Y.; Chen, G.; Chen, H. S.; Chen, M. L.; Chen, S. J.; Chen, X. R.

Science Citation Index Expanded

摘要

A search for the decay h(c) -> pi(0) J/psi is performed using a sample of h(c) produced in the reaction e(+)e(-) -> pi(+)pi(-)h(c). The data samples were collected with the BESIII detector at center-of-mass energies between 4.189 and 4.437 GeV, corresponding to a total integrated luminosity of 11 fb(-1). No significant signal is observed. Upper limits on the branching ratio B(h(c) -> pi(0) J/psi)/B(h(c) -> gamma eta(c) -> gamma K+K-pi(0)) and on the branching fraction B(h(c) -> pi(0) J/psi) are determined to be 7.5 x 10(-2) and 4.7 x 10(-4) at 90% confidence level, respectively. The latter is derived from the former using the measured branching fraction of the normalization channel.

关键词

Branching fraction e(+)-e(-) Experiments Quarkonium