Study of J /ψ →ηφπ+π- at BESIII

M. Ablikim, M. N. Achasov, X. C. Ai, O. Albayrak, M. Albrecht, D. J. Ambrose, A. Amoroso, F. F. An, Q. An, J. Z. Bai, R. Baldini Ferroli, Y. Ban, D. W. Bennett, J. V. Bennett, M. Bertani, D. Bettoni, J. M. Bian, F. Bianchi, E. Boger, O. BondarenkoI. Boyko, R. A. Briere, H. Cai, X. Cai, O. Cakir, A. Calcaterra, G. F. Cao, S. A. Cetin, J. F. Chang, G. Chelkov, G. Chen, H. S. Chen, H. Y. Chen, J. C. Chen, M. L. Chen, S. J. Chen, X. Chen, X. R. Chen, Y. B. Chen, H. P. Cheng, X. K. Chu, G. Cibinetto, D. Cronin-Hennessy, H. L. Dai, J. P. Dai, A. Dbeyssi, D. Dedovich, Z. Y. Deng, H. Muramatsu, R. Poling, BESIII Collaboration

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Abstract

Based on a sample of 2.25×108J/ψ events taken with the BESIII detector at the BEPCII collider, we present the results of a study of the decay J/ψ→ηφπ+π-. The Y(2175) resonance is observed in the invariant mass spectrum of φf0(980) with a statistical significance of greater than 10σ. The corresponding mass and width are determined to be M=2200±6(stat)±5(syst) MeV/c2 and Γ=104±15(stat)±15(syst) MeV, respectively, and the product branching fraction is measured to be B(J/ψ→ηY(2175),Y(2175)→φf0(980),f0(980)→π+π-)=(1.20±0.14(stat)±0.37(syst))×10-4. The results are consistent within errors with those of previous experiments. We also measure the branching fraction of J/ψ→φf1(1285) with f1(1285)→ηπ+π- and set upper limits on the branching fractions for J/ψ→φη(1405)/φX(1835)/φX(1870) with η(1405)/X(1835)/X(1870)→ηπ+π- at the 90% confidence level.

Original languageEnglish (US)
Article number052017
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume91
Issue number5
DOIs
StatePublished - Mar 20 2015

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Ablikim, M., Achasov, M. N., Ai, X. C., Albayrak, O., Albrecht, M., Ambrose, D. J., Amoroso, A., An, F. F., An, Q., Bai, J. Z., Baldini Ferroli, R., Ban, Y., Bennett, D. W., Bennett, J. V., Bertani, M., Bettoni, D., Bian, J. M., Bianchi, F., Boger, E., ... BESIII Collaboration (2015). Study of J /ψ →ηφπ+π- at BESIII. Physical Review D - Particles, Fields, Gravitation and Cosmology, 91(5), [052017]. https://doi.org/10.1103/PhysRevD.91.052017