Search for hadronic transition χcJ→η cπ+π- and observation of χcJ→KK̄πππ

M. Ablikim, M. N. Achasov, D. J. Ambrose, F. F. An, Q. An, Z. H. An, J. Z. Bai, Y. Ban, J. Becker, M. Bertani, J. M. Bian, E. Boger, O. Bondarenko, I. Boyko, R. A. Briere, V. Bytev, X. Cai, O. Cakir, A. Calcaterra, G. F. CaoS. A. Cetin, J. F. Chang, G. Chelkov, G. Chen, H. S. Chen, J. C. Chen, M. L. Chen, S. J. Chen, Y. B. Chen, H. P. Cheng, Y. P. Chu, D. Cronin-Hennessy, H. L. Dai, J. P. Dai, D. Dedovich, Z. Y. Deng, A. Denig, I. Denysenko, M. Destefanis, W. M. Ding, Y. Ding, L. Y. Dong, M. Y. Dong, S. X. Du, J. Fang, S. S. Fang, L. Fava, F. Feldbauer, H. Muramatsu, R. Poling, BESIII Collaboration

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Hadronic transitions of χcJ→ηcπ +π- (J=0, 1, 2) are searched for using a sample of 1.06×108 ψ(3686) events collected with the BESIII detector at the BEPCII storage ring. The ηc is reconstructed with KS0K ±π and K+K-π0 final states. No signals are observed in any of the three χcJ states in either ηc decay mode. At the 90% confidence level, the upper limits are determined to be B(χc0→ηcπ+π -)<0.07%, B(χc1→ηcπ +π-)<0.32%, and B(χc2→η cπ+π-)<0.54%. The upper limit of B(χc1→ηcπ+π-) is lower than the existing theoretical prediction by almost an order of magnitude. The branching fractions of χcJ→KS0K±π π+π-, K+K -π+π-π0, ωK+K -, and π+π-π0 J=0, 1, 2) are measured for the first time.

Original languageEnglish (US)
Article number012002
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number1
StatePublished - Jan 4 2013

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    Ablikim, M., Achasov, M. N., Ambrose, D. J., An, F. F., An, Q., An, Z. H., Bai, J. Z., Ban, Y., Becker, J., Bertani, M., Bian, J. M., Boger, E., Bondarenko, O., Boyko, I., Briere, R. A., Bytev, V., Cai, X., Cakir, O., Calcaterra, A., ... BESIII Collaboration (2013). Search for hadronic transition χcJ→η cπ+π- and observation of χcJ→KK̄πππ. Physical Review D - Particles, Fields, Gravitation and Cosmology, 87(1), [012002].